loadbay
Server Details
Catalog of 370+ open-source AI-agent harnesses. Search, list your own, earn USDC tips via x402.
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP
- URL
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Tool Definition Quality
Average 3.7/5 across 6 of 6 tools scored.
Each tool has a distinct purpose: retrieving a single harness, listing domains, searching, submitting, and two different tipping targets (builder vs. author). No overlap in functionality.
All tools follow a consistent verb_noun snake_case pattern (e.g., get_harness, list_domains, search_harnesses, submit_harness, tip_harness). The only exception is support_loadbay, which still follows the pattern with a verb (support) and noun (loadbay).
6 tools is an appropriate number for a harness catalog market. Each tool serves a core function without redundancy, and the set is neither too sparse nor overwhelming.
The tool surface covers search, details, domain listing, submission, and tipping. Missing update or delete for submitted harnesses, but these are less critical for the catalog's core purpose. A tool to list user submissions would be a minor addition.
Available Tools
6 toolsget_harnessBInspect
Get full details for one harness by its slug.
| Name | Required | Description | Default |
|---|---|---|---|
| slug | Yes | the harness slug, e.g. browser-use |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must disclose all behavioral traits. It does not mention read-only nature, permissions, or what 'full details' entails. The agent lacks information on side effects or safety.
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 a single sentence that is directly front-loaded with the verb. It is concise with no wasted words.
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 1-parameter tool with no output schema, the description is adequate but lacks details on return format or error conditions. It does not fully prepare the agent for using the 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%, and the description redundantly says 'by its slug.' The schema already defines the slug parameter. Description adds no extra semantic meaning beyond what the schema provides.
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 'Get full details for one harness by its slug' clearly states the action (get details), resource (harness), and method (by slug). It distinguishes from siblings like search_harnesses (search) and list_domains (domains).
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?
No explicit guidance on when to use this tool versus alternatives like search_harnesses. The description only implies usage when you have a specific slug, but does not mention exclusions or scenarios.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
list_domainsAInspect
List the harness domains (categories) in the Loadbay catalog.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries full burden. The description does not explicitly state that the tool is read-only or safe, but for a simple list operation with no parameters, the lack of detail is acceptable. A score of 3 indicates adequate transparency given the tool's simplicity.
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 a single sentence that clearly conveys the tool's purpose with no unnecessary words. It is optimally concise and well-structured.
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 no output schema, the description is nearly complete. It could mention that it returns a list or is a simple enumeration, but the context provided (harness domains in Loadbay catalog) is sufficient for a straightforward tool. A score of 4 reflects minor room for improvement.
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 tool has no parameters, and schema coverage is 100%. The description adds context that the domains are from the Loadbay catalog, which is helpful. With zero parameters, a baseline of 4 is appropriate.
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 precisely states the tool lists harness domains (categories) in the Loadbay catalog. The verb 'list' and resource 'harness domains' are clear, and distinct from sibling tools like get_harness or search_harnesses.
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?
No explicit when-to-use or when-not-to-use guidance is provided. The context is implied by the tool's name and description, but alternatives are not discussed. A score of 3 reflects the lack of explicit usage direction.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
search_harnessesAInspect
Search the Loadbay catalog of harnesses for AI agents. Filter by free-text query, domain, and/or capability trait.
| Name | Required | Description | Default |
|---|---|---|---|
| limit | No | max results, default 20 | |
| query | No | free-text over name, author, summary, integrations | |
| trait | No | require a capability trait | |
| domain | No | domain key: trading | coding | browser | productivity | data | social | health | science | gaming | media | robotics |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, and the description does not disclose behavioral traits such as whether the operation is read-only, idempotent, or has side effects. The word 'search' implies a read operation, but this is not explicitly stated.
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 a single sentence front-loaded with the action, and it conveys all key features without redundancy.
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?
The description lacks details about return format or pagination, which would be helpful given no output schema. However, the schema covers parameters well, making the description minimally complete for a search 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 each parameter having a description. The description merely summarizes the filter categories without adding new meaning beyond what the schema already provides.
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 starts with the verb 'search' and specifies the resource 'Loadbay catalog of harnesses'. It mentions filtering by query, domain, and capability trait, clearly distinguishing from sibling tools like get_harness (single retrieval) and list_domains (domain listing).
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 lists filter options but does not explicitly state when to use this tool versus alternatives. Usage is implied for general searching, but no guidance on when not to use or when to prefer get_harness for specific items.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
submit_harnessAInspect
List a new harness on Loadbay. The repo MUST be a public, open-source GitHub repository. Optionally include a Base USDC address to receive tips. The listing appears immediately, tagged as community-added (unverified).
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | harness name, e.g. my-coinbase-harness | |
| repo | Yes | public GitHub repo URL — must be open source (have a license) | |
| author | No | your GitHub handle (defaults to the repo owner) | |
| domain | Yes | domain key, one of: trading | coding | browser | productivity | data | social | health | science | gaming | media | robotics | |
| traits | No | capability traits | |
| summary | Yes | what it connects to, what tools it exposes, how an agent uses it | |
| language | No | primary language, e.g. TypeScript | |
| integrations | No | what it connects to, e.g. ["Coinbase","Slack"] | |
| solanaAddress | No | Solana wallet (base58) to receive USDC (SPL) tips — optional, alongside or instead of Base | |
| baseUsdcAddress | No | Base USDC wallet (0x…) to receive tips — only if you want to get paid |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description discloses key behavioral traits: listing appears immediately and is tagged as community-added (unverified). It could further mention uniqueness constraints or auth needs.
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 concise sentences, front-loaded with the core action and essential conditions. No wasted words.
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 10 parameters and no output schema, the description covers the core purpose and key rule but omits details like domain enum values, trait meanings, or error handling.
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%, so baseline is 3. The description adds marginal context (e.g., why baseUsdcAddress is optional) but does not significantly enhance understanding beyond 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 the tool's action ('List a new harness on Loadbay') and distinguishes it from siblings like get_harness and search_harnesses through context.
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 provides essential usage requirements (repo must be public, open-source; optional tip address) but does not explicitly compare to sibling tools or state 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.
support_loadbayBInspect
Support the Loadbay builder with a USDC tip over x402. Returns the payable endpoint — GET it with your own x402 wallet to send the tip. Loadbay never holds funds; your wallet is the payer.
| Name | Required | Description | Default |
|---|---|---|---|
| amount | No | tip amount in USD (default 5); the builder receives USDC |
Tool Definition Quality
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Discloses that the tool returns a payable endpoint and that Loadbay never holds funds, which is good. However, missing details on side effects, idempotency, or any prerequisites (e.g., needing an x402 wallet setup).
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, no redundancy, front-loaded with actionable information. Every sentence 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?
Covers the essential flow (returns endpoint, user GETs it) and a key property (no fund holding). Lacks detail on the response format (e.g., URL) and any prerequisites, but sufficient for a simple tool with one parameter.
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 only parameter 'amount' is fully described in the schema (tip amount in USD, default 5, builder receives USDC). The tool description adds no additional semantic value beyond that.
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 the tool is for supporting the Loadbay builder with a USDC tip via x402, distinguishing it from sibling tools like tip_harness which likely targets generic harnesses.
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?
No explicit guidance on when to use this tool versus alternatives (e.g., tip_harness). The description implies the user must GET the endpoint with their own x402 wallet, but doesn't set conditions or restrictions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
tip_harnessAInspect
Tip a harness author in USDC over x402. Returns the payable endpoint and its payment details — GET it with an x402-capable client/wallet to actually send the tip (the agent's own wallet pays; Loadbay never holds funds).
| Name | Required | Description | Default |
|---|---|---|---|
| slug | Yes | the harness slug to tip | |
| amount | No | tip amount in USD (default 1); the author receives USDC |
Tool Definition Quality
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 discloses that the agent's wallet pays, Loadbay never holds funds, and that the tool returns a payable endpoint that must be GETted. This provides good security and flow transparency, though it could include rate limits or auth details.
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 with no waste. The description is front-loaded with the action and key details, making it easy to scan.
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?
No output schema, but the description explains what is returned (payable endpoint and payment details). For a payment initiation tool, this adequately covers the flow and expected response.
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%, so the description adds minimal value beyond schema definitions. It clarifies that amount is in USD and author receives USDC, which is helpful context but not essential given the schema already describes both parameters.
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 the action (tip), resource (harness author), and currency (USDC) via x402. It distinguishes itself from sibling tools (get, list, search, submit, support) 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 implies usage for tipping but does not explicitly state when to use this tool versus alternatives or provide any exclusions. It mentions the x402 requirement but lacks clear context for decision-making.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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