FluxMCP
Summary: FluxMCP lets you generate and edit AI images, generate FLUX 3 videos, and manage asynchronous Flux tasks through MCP tools.
Generate images from text prompts with Flux models and configurable size, model, image count, and callback URL (
flux_generate_image).Edit existing images from a direct image URL using text instructions (
flux_edit_image).Generate FLUX 3 videos in text-to-video, image-to-video, video-to-video, or owned-draft-enhancement modes, with async/sync, duration, resolution, aspect ratio, audio, safety, and callback options (
flux_generate_video).Check the status/result of a single image or video generation task (
flux_get_task).Query multiple image or video task statuses in one request, up to about 50 tasks (
flux_get_tasks_batch).Browse available Flux models and their capabilities (
flux_list_models).Browse available Flux tools, use cases, and workflow guidance (
flux_list_actions).
Provides tools for AI image generation and editing using Flux models (flux-dev, flux-pro, flux-pro-1.1, flux-pro-1.1-ultra, flux-kontext-pro, and flux-kontext-max) via the AceDataCloud platform, enabling text-to-image generation and context-aware image modification.
FluxMCP
A Model Context Protocol (MCP) server for AI image generation and editing using Flux through the AceDataCloud platform.
Generate and edit stunning AI images with Flux models (flux-dev, flux-pro, flux-kontext) directly from Claude, Cursor, or any MCP-compatible client.
Features
Image Generation - Generate images from text prompts with 6 Flux models
Image Editing - Edit existing images with context-aware Flux Kontext models
Task Management - Track async generation tasks and batch status queries
Model Guide - Built-in model selection and prompt writing guidance
Dual Transport - stdio (local) and HTTP (remote/cloud) modes
Docker Ready - Containerized with K8s deployment manifests
Secure - Bearer token auth with per-request isolation in HTTP mode
Related MCP server: DiffuGen
Tool Reference
Tool | Description |
| Generate AI images from a text prompt using Flux. |
| Edit an existing image using Flux with a text prompt. |
| List all available Flux models and their capabilities. |
| List all available Flux tools and their use cases. |
| Query the status and result of a Flux image generation task. |
| Query multiple Flux image generation tasks at once. |
Connect: hosted OAuth, API token, or local stdio
The hosted endpoint is https://flux.mcp.acedata.cloud/mcp. Choose one route for the MCP client:
Route | When to use it | Credential setup |
Hosted OAuth | The client supports remote MCP OAuth | Add only the URL, then sign in to AceDataCloud and approve access. No token needs to be pasted into client configuration. |
Hosted API token | The client cannot finish OAuth, or you need an explicit integration credential | Send an AceDataCloud API token in the |
Local stdio | The client runs a local MCP process | Install |
The hosted service advertises OAuth metadata and Dynamic Client Registration (DCR). DCR registers the client application; it is not an API key. OAuth signs you in and the client sends the resulting Bearer token; it may reuse or create an API credential for the account. Browser sign-in still requires an AceDataCloud account. The hosted service can be metered: review current service documentation and displayed pricing before a real operation. Do not configure both an OAuth login and a fixed Authorization header for the same server.
Hosted OAuth examples
Claude and Claude Desktop chat: Add a remote custom connector in
Customize → Connectors → Add custom connector, enterhttps://flux.mcp.acedata.cloud/mcp, select sign-in, and choose Register automatically if Claude asks how to register its OAuth client. Complete consent. Claude Desktop's localclaude_desktop_config.jsonis a separate setup. Claude connector guide.Claude Code:
claude mcp add --transport http --scope user flux https://flux.mcp.acedata.cloud/mcp, thenclaude mcp login flux. Check/mcp. Claude Code MCP guide.Cursor: Add a remote server with only
https://flux.mcp.acedata.cloud/mcp. For a project, merge the entry below into<project>/.cursor/mcp.json; for personal use, use~/.cursor/mcp.json. Cursor MCP guide.VS Code / Copilot: Run MCP: Add Server, select HTTP, enter
https://flux.mcp.acedata.cloud/mcp, then finish the browser sign-in. New portable workspace configs use<project>/.mcp.json; the VS Code-specific format below uses<project>/.vscode/mcp.jsonor the user profile. Check MCP: List Servers. VS Code MCP setup.Codex:
codex mcp add flux --url https://flux.mcp.acedata.cloud/mcp, thencodex mcp login flux. Its user settings are in~/.codex/config.toml. Official Codex MCP guide.
Cursor project config (OAuth):
{
"mcpServers": {
"flux": {"url": "https://flux.mcp.acedata.cloud/mcp"}
}
}VS Code-specific workspace config (OAuth):
{
"servers": {
"flux": {"type": "http", "url": "https://flux.mcp.acedata.cloud/mcp"}
}
}Hosted API token
Sign in at AceDataCloud Platform, open the service page, and obtain an API credential. A fixed Bearer header is useful when your client lacks OAuth; an invalid header does not fall back to OAuth in Claude Code. The header value is sensitive, so keep it out of committed files and screenshots.
For Claude Code, the shell expands the token when you add the server; treat the saved user MCP config as a secret:
export ACEDATACLOUD_API_TOKEN='YOUR_API_TOKEN'
claude mcp add --transport http --scope user flux https://flux.mcp.acedata.cloud/mcp \
--header "Authorization: Bearer $ACEDATACLOUD_API_TOKEN"For a Claude Code project config, put a variable reference in <project>/.mcp.json and set that variable in the environment that launches Claude Code:
{
"mcpServers": {
"flux": {
"type": "http",
"url": "https://flux.mcp.acedata.cloud/mcp",
"headers": {"Authorization": "Bearer ${ACEDATACLOUD_API_TOKEN}"}
}
}
}Cursor uses a different environment-variable syntax in ~/.cursor/mcp.json or an uncommitted project config:
{
"mcpServers": {
"flux": {
"url": "https://flux.mcp.acedata.cloud/mcp",
"headers": {"Authorization": "Bearer ${env:ACEDATACLOUD_API_TOKEN}"}
}
}
}In VS Code, run MCP: Open User Configuration and merge this server plus its masked input; ${input:...} is for VS Code's user/workspace format and is not portable to the Agent Host .mcp.json format:
{
"inputs": [
{"id": "acedata-flux-token", "type": "promptString", "description": "AceDataCloud API token", "password": true}
],
"servers": {
"flux": {
"type": "http",
"url": "https://flux.mcp.acedata.cloud/mcp",
"headers": {"Authorization": "Bearer ${input:acedata-flux-token}"}
}
}
}For Cline, use its MCP configuration UI or CLI file ~/.cline/data/settings/cline_mcp_settings.json; its remote transport value is streamableHttp. For JetBrains AI Assistant, add a remote URL from Settings → Tools → AI Assistant → Model Context Protocol (MCP). For Zed, use a context_servers entry with the URL only for OAuth or add a local Bearer header. These clients have different configuration schemas; follow their current UI rather than copying another client's JSON. Cline · JetBrains · Zed.
Local stdio
Install the package and give the local process an API token:
python -m pip install mcp-flux-pro
export ACEDATACLOUD_API_TOKEN='YOUR_API_TOKEN'
mcp-flux-proFor Claude Desktop local MCP, merge this entry into the file opened by its developer settings (~/Library/Application Support/Claude/claude_desktop_config.json on macOS). uvx requires uv on PATH:
{
"mcpServers": {
"flux": {
"command": "uvx",
"args": ["mcp-flux-pro"],
"env": {"ACEDATACLOUD_API_TOKEN": "YOUR_API_TOKEN"}
}
}
}Keep this user-level file private. Self-hosted HTTP uses mcp-flux-pro --transport http --port 8000; expose it only with suitable network and TLS controls. Local execution still calls the AceDataCloud API.
Check before using the service
https://flux.mcp.acedata.cloud/healthreturning{"status":"ok"}checks endpoint reachability only.Confirm that the MCP client loads tools.
flux_list_modelsis a reference tool; it does not verify downstream API access or balance.If you need a full API check, call
flux_generate_imagewith your own valid input after reviewing current service documentation and displayed pricing. If the result contains a task ID, callflux_get_taskon that same ID until terminal success or failure. Do not resubmit the operation just to check progress.
For 401, check which auth route the client used and whether the token or OAuth session is valid. A 403 may mean an account permission or content moderation failure; read the returned error. Insufficient balance and downstream service failures need their own diagnosis. A listed tool or submitted task does not prove a successful result.
Available Tools
Tool | Description |
| Generate images from text prompts with model selection |
| Edit existing images with text instructions |
| Query status of a single generation task |
| Query multiple task statuses at once |
| List all available Flux models and capabilities |
| Show all tools and workflow examples |
Available Prompts
Prompt | Description |
| Guide for choosing the right tool and model |
| Best practices for writing effective prompts |
| Common workflow patterns and examples |
Supported Models
Model | Quality | Speed | Size Format | Best For |
| Good | Fast | Pixels (256-1440px) | Quick prototyping |
| High | Medium | Pixels (256-1440px) | Production use |
| High | Medium | Aspect ratios | Image editing |
| Highest | Slower | Aspect ratios | Complex editing |
| High | Fast | Aspect ratios | Flux 2 balanced quality |
| Higher | Medium | Aspect ratios | Flux 2 production |
| Highest | Slower | Aspect ratios | Flux 2 maximum quality |
| Good | Fast | Aspect ratios | Flux 2 efficient output |
Usage Examples
Generate an Image
"Generate a photorealistic mountain landscape at golden hour"
→ flux_generate_image(prompt="...", model="flux-2-max", size="16:9")Edit an Image
"Add sunglasses to the person in this photo"
→ flux_edit_image(prompt="Add sunglasses", image_url="https://...", size="1:1", model="flux-kontext-pro")Check Task Status
"What's the status of my generation?"
→ flux_get_task(task_id="...")Environment Variables
Variable | Required | Default | Description |
| Yes (stdio) | — | API token from AceDataCloud |
| No |
| API base URL |
| No | — | OAuth client ID (hosted mode) |
| No |
| Platform base URL |
| No |
| Request timeout in seconds |
| No |
| MCP server name |
| No |
| Logging level |
Development
Setup
git clone https://github.com/AceDataCloud/FluxMCP.git
cd FluxMCP
pip install -e ".[all]"
cp .env.example .env
# Edit .env with your API tokenLint & Format
ruff check .
ruff format .
mypy core tools main.pyTest
# Unit tests
pytest --cov=core --cov=tools
# Skip integration tests
pytest -m "not integration"
# With coverage report
pytest --cov=core --cov=tools --cov-report=htmlGit Hooks
git config core.hooksPath .githooksAPI Reference
This MCP server uses the AceDataCloud Flux API:
POST /flux/images — Generate or edit images
POST /flux/tasks — Query task status (single or batch)
Full API documentation: platform.acedata.cloud
Documentation
License
MIT License — see LICENSE for details.
Links
FLUX 3 video
Use flux_generate_video with a structured request for t2v, i2v, v2v or draft_enhance. For example: {"mode":"t2v","prompt":"Waves at sunset","duration":5,"resolution":"hd","generate_audio":false}. Image mode requires keyframes; video mode requires start_video. Draft enhancement uses an owned platform draft_task_id and requires the temporary draft cache still to be available.
Video generation uses POST /flux/videos with action=generate (default) and mode=t2v/i2v/v2v/draft_enhance. Each generation mode accepts its own fields. Tools return task IDs asynchronously by default; use flux_get_task for the final video. Set async=false in the request to wait synchronously.
Available Tools
7 toolsflux_edit_imageAInspect
Edit an existing image using Flux with a text prompt.
This allows you to modify an existing image based on a text description.
The kontext models (flux-kontext-pro, flux-kontext-max) are specifically
designed for high-quality image editing and style transfer.
Use this when:
- You want to modify or transform an existing image
- You want to change specific elements in an image
- You want to apply style changes or artistic effects
- You want to add, remove, or replace objects in an image
For generating new images from scratch, use flux_generate_image instead.
Returns:
Task ID and edited image information including URLs.
| Name | Required | Description | Default |
|---|---|---|---|
| size | Yes | Required output image size. For kontext models: aspect ratios like '1:1', '16:9'. For other models: pixel dimensions like '1024x1024'. | |
| model | No | Flux model to use for editing. Recommended models for editing: - flux-kontext-pro: Best for context-aware editing and style transfer (recommended) - flux-kontext-max: Maximum context for complex edits - flux-dev: Basic editing support Other models also support editing but kontext models give best results. | flux-kontext-pro |
| prompt | Yes | Description of how to edit the image. Be specific about what changes to make. Examples: 'Change the background to a sunset beach', 'Add sunglasses to the person', 'Make it look like a watercolor painting', 'Replace the car with a bicycle' | |
| image_url | Yes | URL of the image to edit. Must be a direct image URL (JPEG, PNG, etc.), not a web page containing an image. | |
| callback_url | No | Webhook callback URL for asynchronous notifications. |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It explains the edit operation and mentions kontext model specifics but doesn't disclose async behavior (callback_url suggests it), rate limits, or auth requirements. Adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Well-structured with clear sections, front-loaded purpose, and a concise returns line. Slightly long but every sentence adds value for usage guidance.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Covers purpose, usage, alternatives, and parameter guidance. The output schema exists and the return statement is brief; however, missing behavioral details (async, callback semantics) and no explicit when-not-to-use beyond generation, but sufficient for a complex multi-model tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with descriptions for all parameters. The description adds value by elaborating on recommended models and giving prompt examples beyond the schema, though not deeply for other params.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states 'Edit an existing image using Flux with a text prompt' with specific verbs and resource. It clearly distinguishes from flux_generate_image by explicitly noting the sibling for generation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Provides explicit 'Use this when' list with four concrete scenarios and names the alternative tool (flux_generate_image) for when not to use it.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
flux_generate_imageAInspect
Generate AI images from a text prompt using Flux.
Flux is a family of fast, high-quality image generation models by Black Forest Labs.
Different models offer different tradeoffs between speed, quality, and capabilities.
Use this when:
- You want to create new images from a text description
- You need high-quality AI-generated artwork or photos
- You want fast image generation with good prompt following
For editing existing images, use flux_edit_image instead.
Returns:
Task ID and generated image information including URLs.
| Name | Required | Description | Default |
|---|---|---|---|
| size | Yes | Required image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. | |
| count | No | Number of images to generate. Only supported for generate action. Default is 1. | |
| model | No | Flux model to use for generation. Options: - flux-dev: Fast development model, good balance of speed and quality (default) - flux-pro: Higher quality production model - flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32) - flux-2-pro: Flux 2 professional model, high quality - flux-2-max: Flux 2 maximum-quality model - flux-2-klein: Flux 2 klein model, efficient generation - flux-kontext-pro: Context-aware model for editing and style transfer - flux-kontext-max: Maximum context model for complex editing tasks | flux-dev |
| prompt | Yes | Description of the image to generate. Be descriptive about style, subject, lighting, and composition. Examples: 'A majestic mountain landscape at golden hour, photorealistic', 'Cyberpunk street scene with neon lights and rain, cinematic', 'Minimalist logo design of a phoenix, vector art style' | |
| callback_url | No | Webhook callback URL for asynchronous notifications. When provided, the API will POST to this URL when the image is generated. |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full transparency burden. It mentions returning a 'Task ID and generated image information including URLs,' which hints at async/task-based behavior. However, it does not explain whether generation is synchronous, how long it may take, whether it should be polled via flux_get_task, or side effects such as cost/rate limits. Some insight is given, but it is not comprehensive.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The structure is effective: a one-sentence purpose, brief context, use-case bullets, a sibling-tool contrast, and a returns section. It is slightly wordier than necessary—some model-family background could be trimmed—but every section earns its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a 5-parameter image-generation tool, the description provides enough high-level context: generation purpose, model family tradeoff, use cases, editing alternative, and output type. It does not explicitly mention how to monitor task progress or poll until successful generation, but the 'Task ID' return value and the presence of flux_get_task make a workable inference.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the baseline is 3. The description refers to prompts and mentions high-quality generation, but does not add substantial meaning beyond the schema's parameter descriptions. The schema already documents model recommendations, size formats, count/defaults, and callback_url semantics.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description opens with a specific verb and resource: 'Generate AI images from a text prompt using Flux.' It clearly distinguishes this tool from flux_edit_image by explicitly stating that editing existing images should use the sibling tool.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The 'Use this when' section lists three concrete scenarios for new image generation, and explicitly states that editing existing images should use flux_edit_image instead. This provides clear when-to-use and when-not-to-use guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
flux_generate_videoBInspect
Generate text/image/video-to-video or enhance an owned temporary draft. Poll flux_get_task.
| Name | Required | Description | Default |
|---|---|---|---|
| request | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description carries the full burden. It discloses the async/polling implication and warns that draft availability is temporary, which is real behavioral value, but it says nothing about auth/permissions, cost, rate limits, or what async=false does.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences, front-loaded with the capability and ending with the follow-up action. No filler. Slightly compressed phrasing ('owned temporary draft') costs a little clarity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
An output schema exists so return values need not be explained, and the polling hint covers the async lifecycle. However, the four-way oneOf with zero schema descriptions and no textual explanation of mode-specific required fields leaves genuine gaps for a fairly complex tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Only one top-level parameter ('request'), but it is a oneOf over four nested request shapes with 0% description coverage, so the schema supplies no prose. The description sketches the mode space but does not explain per-mode requirements (keyframes, start_video, duration caps, safety_tolerance).
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a clear verb+resource (generate video) and enumerates the supported input modes (text/image/video-to-video) plus the draft-enhance variant, which maps onto the schema's mode discriminator. It distinguishes the tool from flux_generate_image, though it does not name that sibling explicitly.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
'Poll flux_get_task' gives useful post-call guidance for the default async flow, but the description never says when to pick draft_enhance versus a generate mode, or when async=false is appropriate. Usage is implied rather than stated.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
flux_get_taskAInspect
Query the status and result of a Flux image or video generation task.
Use this to check if a generation is complete and retrieve the resulting
image/video URLs and metadata.
Use this when:
- You want to check if an image generation has completed
- You need to retrieve image URLs from a previous generation
- You used async callback and want to check results later
- The initial generation returned a task_id without immediate results
Returns:
Task status and generation result including image URLs.
| Name | Required | Description | Default |
|---|---|---|---|
| task_id | Yes | The task ID returned from a generation or edit request. This is the 'task_id' field from any flux_generate_image, flux_edit_image or a FLUX video tool response. |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations, so the description carries the full burden. It discloses the async polling role and that results contain image/video URLs and metadata, but says nothing about the possible task states, whether results expire, or auth requirements — real gaps for a no-annotation tool, though the core behavior is conveyed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Front-loaded purpose sentence followed by scannable bullets; every line is relevant. Minor redundancy in the 'Returns' block, which restates output already covered by the output schema.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a one-parameter read tool with a full output schema and 100% schema coverage, this is nearly complete. The redundant Returns section and the missing batch-sibling routing are the only shortfalls.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% and the single task_id parameter is fully documented in the schema, including its origin fields. The description adds no parameter detail beyond that, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb+resource: 'Query the status and result of a Flux image or video generation task.' Clear that this is a polling/retrieval tool distinct from the generation siblings, but it never differentiates itself from flux_get_tasks_batch, the obvious plural counterpart.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Four explicit when-to-use bullets cover the polling scenarios (checking completion, retrieving URLs, async callback follow-up, task_id with no immediate result). No when-not-to-use guidance and no pointer to flux_get_tasks_batch for multi-task retrieval, so it stops short of a 5.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
flux_get_tasks_batchAInspect
Query multiple Flux image or video generation tasks at once.
Efficiently check the status of multiple tasks in a single request.
More efficient than calling flux_get_task multiple times.
Use this when:
- You have multiple pending generations to check
- You want to get status of several images at once
- You're tracking a batch of generations
Returns:
Status and result information for all queried tasks.
| Name | Required | Description | Default |
|---|---|---|---|
| task_ids | Yes | List of task IDs to query. Maximum recommended batch size is 50 tasks. |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It confirms this is a read-style status check returning 'status and result information for all queried tasks', but discloses nothing about permissions, rate limits, or failure behavior for missing/invalid task IDs. Adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Front-loaded with the core purpose, then a scannable usage list and a short returns note. The bullet list is somewhat redundant ('check status of several images' vs 'tracking a batch'), keeping it just short of a 5.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple one-parameter read tool with an output schema present, the description covers purpose, usage, and a return-value hint without needing to detail the response shape. Nothing critical to correct invocation is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, and the schema itself documents the single task_ids parameter including the recommended max batch of 50. The description adds no parameter-level detail beyond the schema, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ('Query multiple Flux image or video generation tasks at once') and explicitly differentiates from the sibling flux_get_task by name. An agent can immediately tell it is the batch variant of a task-status query.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Provides an explicit 'Use this when' list of three qualifying scenarios and directly names the alternative ('More efficient than calling flux_get_task multiple times'), so the routing decision is unambiguous.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
flux_list_actionsAInspect
List all available Flux tools and their use cases.
Reference guide for what each tool does and when to use it.
Returns:
Categorized list of all tools with descriptions.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description bears the full burden. It states the return type ('categorized list of all tools with descriptions') but doesn't disclose behavioral traits like no side effects, idempotency, or performance characteristics. For a list operation, this is adequate but not exemplary.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Three sentences, no waste. The first sentence immediately states the core purpose, the second explains its role, and the third describes the return. Front-loaded and efficient.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no parameters and the presence of an output schema, the description sufficiently explains what the tool does and what it returns. It is complete for a simple listing tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has zero parameters, and the description adds value by confirming that it lists 'all' available tools, implying no filtering options. With 100% schema coverage, the description reinforces the simplicity.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states 'List all available Flux tools and their use cases,' which is a specific verb-resource combination. It distinguishes from sibling tools like flux_generate_image and flux_list_models, which have different purposes.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description frames it as a 'reference guide for what each tool does and when to use it,' implying it should be used to understand other tools. While it doesn't explicitly state when not to use it, the sibling context makes its utility clear.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
flux_list_modelsAInspect
List all available Flux models and their capabilities.
Reference guide for choosing the right Flux model for your use case.
Returns:
Detailed list of all Flux models with descriptions and recommendations.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description fully bears the burden of disclosure. It adequately describes the behavior: listing models with capabilities and recommendations, implying a read-only, non-destructive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise with three short sentences covering what, why, and return. It is front-loaded with the primary action and adds value without verbosity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no parameters and an output schema, the description is fairly complete. It explains the purpose, return value, and use case, though it could explicitly state it is read-only.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
There are no parameters, and schema coverage is 100%. The description adds context by stating the return content (detailed list with descriptions and recommendations), which is not in the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states that the tool lists all available Flux models and their capabilities, with a specific verb (List) and resource (Flux models). This distinguishes it from sibling tools that edit, generate, or retrieve tasks.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description mentions it is a 'Reference guide for choosing the right Flux model for your use case,' implying usage before model-dependent operations, but it does not explicitly exclude other uses or mention alternative tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
2 tool updates
v0.1.12- Added
flux_generate_video - Changed
flux_get_task1 field changed- changed
Input schema / properties / task_id / descriptionPrevious value: -"The task ID returned from a generation or edit request. This is the 'task_id' field from any flux_generate_image or flux_edit_image tool response."New value: +"The task ID returned from a generation or edit request. This is the 'task_id' field from any flux_generate_image, flux_edit_image or a FLUX video tool response."
2 tool updates
v0.1.9- Changed
flux_edit_image5 fields changed- removed
Input schema / properties / size / anyOfRemoved value: -[ - { - "type": "string" - }, - { - "type": "null" - } -] - removed
Input schema / properties / size / defaultRemoved value: -null - changed
Input schema / properties / size / descriptionPrevious value: -"Output image size. For kontext models: aspect ratios like '1:1', '16:9'. For other models: pixel dimensions like '1024x1024'."New value: +"Required output image size. For kontext models: aspect ratios like '1:1', '16:9'. For other models: pixel dimensions like '1024x1024'." - added
Input schema / properties / size / typeAdded value: +"string" - changed
Input schema / requiredPrevious value: -[ - "prompt", - "image_url" -]New value: +[ + "prompt", + "image_url", + "size" +]
- Changed
flux_generate_image5 fields changed- removed
Input schema / properties / size / anyOfRemoved value: -[ - { - "type": "string" - }, - { - "type": "null" - } -] - removed
Input schema / properties / size / defaultRemoved value: -null - changed
Input schema / properties / size / descriptionPrevious value: -"Image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. Default varies by model."New value: +"Required image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'." - added
Input schema / properties / size / typeAdded value: +"string" - changed
Input schema / requiredPrevious value: -[ - "prompt" -]New value: +[ + "prompt", + "size" +]
2 tool updates
v0.1.7- Changed
flux_edit_image1 field changed- changed
Input schema / properties / model / enumPrevious value: -[ - "flux-dev", - "flux-pro", - "flux-kontext-pro", - "flux-kontext-max", - "flux-2-flex", - "flux-2-pro", - "flux-2-max" -]New value: +[ + "flux-dev", + "flux-pro", + "flux-kontext-pro", + "flux-kontext-max", + "flux-2-flex", + "flux-2-pro", + "flux-2-max", + "flux-2-klein" +]
- Changed
flux_generate_image2 fields changed- changed
Input schema / properties / model / descriptionPrevious value: -"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32)\n- flux-2-pro: Flux 2 professional model, high quality\n- flux-2-max: Flux 2 maximum-quality model\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks"New value: +"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32)\n- flux-2-pro: Flux 2 professional model, high quality\n- flux-2-max: Flux 2 maximum-quality model\n- flux-2-klein: Flux 2 klein model, efficient generation\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks" - changed
Input schema / properties / model / enumPrevious value: -[ - "flux-dev", - "flux-pro", - "flux-kontext-pro", - "flux-kontext-max", - "flux-2-flex", - "flux-2-pro", - "flux-2-max" -]New value: +[ + "flux-dev", + "flux-pro", + "flux-kontext-pro", + "flux-kontext-max", + "flux-2-flex", + "flux-2-pro", + "flux-2-max", + "flux-2-klein" +]
1 tool update
v0.1.6- Changed
flux_generate_image2 fields changed- changed
Input schema / properties / model / descriptionPrevious value: -"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-pro-1.1: Improved production model with better prompt following\n- flux-pro-1.1-ultra: Highest quality, supports aspect ratios instead of pixel sizes\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks"New value: +"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32)\n- flux-2-pro: Flux 2 professional model, high quality\n- flux-2-max: Flux 2 maximum-quality model\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks" - changed
Input schema / properties / size / descriptionPrevious value: -"Image size. For flux-dev/pro/pro-1.1: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-pro-1.1-ultra and kontext models: aspect ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. Default varies by model."New value: +"Image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. Default varies by model."
6 tool updates
v0.1.3- Added
flux_edit_image - Added
flux_generate_image - Added
flux_get_task - Added
flux_get_tasks_batch - Added
flux_list_actions - Added
flux_list_models
6 tool updates
v0.1.2- Removed
flux_edit_image - Removed
flux_generate_image - Removed
flux_get_task - Removed
flux_get_tasks_batch - Removed
flux_list_actions - Removed
flux_list_models
6 tool updates
v0.1.0- First observed
flux_edit_image - First observed
flux_generate_image - First observed
flux_get_task - First observed
flux_get_tasks_batch - First observed
flux_list_actions - First observed
flux_list_models
TDQS
Scored across 7 tools
flux_generate_image and flux_edit_image are clearly distinguished by their generation vs. editing semantics, and flux_get_task vs. flux_get_tasks_batch differ by singular/plural. However, the action of checking generation status is split across three tools (get_task, get_tasks_batch, and the generate_* tools that return task IDs), which could create minor confusion about when to poll.
All tools follow a consistent flux_verb_noun pattern: get_task, edit_image, get_tasks_batch, generate_video, generate_image, list_actions, list_models. The only variation is the plural 'tasks' in get_tasks_batch, which is a natural and readable exception.
Seven tools is well-scoped for an image/video generation service. It covers generation, editing, status checking, batch status, and two reference lists without redundancy.
Core workflows are covered: generate image/video, edit image, poll status (single and batch), and list models/actions. Minor gaps include no explicit cancellation or deletion of tasks, and no way to list past tasks, but agents can work around these.
Maintenance
Related MCP Connectors
AI image, video & music generation. Flux, Veo 3.1, Suno V5. Free tier included.
Generate, edit, and explore AI images. Flux, Imagen, LoRA identity swap, upscale, and more.
Best Image and video generation: 20+ models (Kling, Seedance, Veo, NB, FLUX.2), OAuth, pay-per-use.
Official FLUX MCP server. Generate, edit, vary, and browse images from Black Forest Labs.
Related MCP Servers
- AlicenseBqualityDmaintenanceA server that integrates Flux's advanced image generation and manipulation features into AI coding assistants, enabling seamless text-to-image and image control workflows in IDEs like Cursor and Windsurf.410 npm25MIT
- AlicenseNot gradedqualityDmaintenancePowerful image generation system leveraging multiple Stable Diffusion models (flux-schnell, flux-dev, sdxl, sd3, sd15) for creating high-quality AI-generated images with precise customization.20MIT
- AlicenseBqualityFmaintenanceEnables seamless integration with Fal.ai's 600+ image generation models including Flux and Stable Diffusion. Supports real-time streaming, workflow execution, and unified access to AI image generation through natural language.523 npmMIT
- AlicenseAqualityDmaintenanceEnables AI image generation using FLUX models through ComfyUI with GPU acceleration, supporting image generation, 4x upscaling, and background removal with optimized Docker deployment.64MIT