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RedHold

diagrams-so

Official
by RedHold

Server Configuration

Describes the environment variables required to run the server.

NameRequiredDescriptionDefault
DIAGRAMS_API_KEYNoAPI key for CI and headless use; normally login is used instead.
DIAGRAMS_BROWSERNoSpecify a non-default browser to use for login, e.g. 'Google Chrome'.
DIAGRAMS_API_BASENoBase URL for the Diagrams.so API. Defaults to https://api.diagrams.so/api/v2https://api.diagrams.so/api/v2
DIAGRAMS_NO_BROWSERNoSet to any value to prevent login from opening a browser; the URL is printed instead.
DIAGRAMS_NO_AUTO_LOGINNoSet to any value to disable automatic login in tools; unauthenticated tools will prompt to run login.
DIAGRAMS_API_TIMEOUT_MSNoPer-request timeout in milliseconds. Defaults to 450000.450000

Capabilities

Features and capabilities supported by this server

CapabilityDetails
tools
{
  "listChanged": true
}

Tools

Functions exposed to the LLM to take actions

NameDescription
generate_diagramA

Create a new cloud architecture diagram from a natural-language prompt. Returns the diagram id, its draw.io XML, Well-Architected warnings, score, and credits used. Costs credits.

edit_diagramA

Apply a natural-language change to an existing diagram (e.g. 'add a Redis cache'). Creates a new version and returns the updated XML. Costs credits. Confirm with the user before calling — it mutates the diagram.

fix_warningA

Resolve a single Well-Architected warning (from get_warnings), leaving the rest of the diagram untouched. Creates a new version. Costs credits.

relayout_diagramA

Automatically re-arrange a diagram's layout for readability (async). Starts the job and waits for it to finish, returning the re-laid XML + fresh warnings/score. Every re-layout costs credits based on the tokens it uses (like edit/fix) and requires confirm=true. If the job is still running when the wait elapses, returns a job_id you can poll with get_relayout_status.

import_diagramA

Import an existing draw.io (mxGraphModel/mxfile) XML document as a new diagram in your account. Validated and sanitized. Free (no AI).

update_diagramA

Update a diagram's metadata or XML: rename it, change visibility (public/private — paid plans for private), or replace its XML. Pass only the fields you want to change. Free (no AI).

delete_diagramA

Delete (soft-delete) a diagram you own. It stops appearing in list_diagrams and can no longer be fetched. Confirm with the user before calling — this is destructive.

revert_diagramA

Revert a diagram to an earlier version (from list_versions). Pass either version_id or version_number. Free (no AI).

get_diagramA

Fetch a diagram by id — returns its title, draw.io XML, and Well-Architected score.

list_diagramsA

List your diagrams (newest first, cursor-paginated). Returns id, title, cloud, type.

get_warningsA

List the Well-Architected findings for a diagram (each has type, component, message). Free.

export_diagramA

Export a diagram as a raw file: drawio (open at app.diagrams.net) or svg. Returns the file content directly. SVG export is a paid feature.

list_versionsA

List a diagram's version history (ascending; is_current marks the live one). Use with revert_diagram / get_version.

get_versionA

Fetch a specific version's XML + Well-Architected score (e.g. to inspect before reverting). Free.

get_relayout_statusA

Check the status of an async re-layout job started by relayout_diagram. Returns pending/done/failed; when done+applied it includes the re-laid XML + fresh warnings/score. Free.

search_galleryA

Search public community diagrams and curated library templates to reuse as a starting point. Returns id, title, and source (community/library). Fork one with fork_template.

fork_templateA

Copy a PUBLIC gallery diagram or curated library template into your own account (private) so you can edit it. Returns the new diagram id.

enhance_promptC

Turn a rough idea into a detailed generation prompt. Free.

clarify_promptA

Get 1–3 clarifying questions (and a suggested diagram type) for a vague prompt, before generating. Free.

get_usageA

Show your current plan, credits remaining, and per-action cost estimates. Free.

get_usage_historyA

List how much credit each past task (generate/edit/fix/relayout) charged — newest first, with the diagram it touched and the surface (api/sdk/mcp) that ran it. Use this to answer 'how much did each task cost?'. Also shows a running tally of tasks performed in THIS session. Free (read-only).

whoamiA

Show the account, plan, scopes, and live/test mode of the configured API key. Free.

list_capabilitiesA

Discover the valid diagram types, cloud providers, and export formats the API supports — so you pass valid values to generate_diagram / export_diagram. Free.

Prompts

Interactive templates invoked by user choice

NameDescription

No prompts

Resources

Contextual data attached and managed by the client

NameDescription

No resources

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