PayAPI Market

Search settlement-verified x402 APIs. Discovery is free. Agents pay the provider in USDC on Base.

Should I use this

Quality & Safety

A
Description quality
100%
Schema completeness
90%
Naming quality
100%
Poisoning risk
80%
Permission match
100%
Protocol compliance
100%

Findings (2)

  • HIGHTool poisoning patterns detected
  • MEDIUMTool description contains URL to non-standard domainin get_api

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~459Tokens (tool definitions)
~864 BTypical response size
Minimal attention impact (0.36% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "marketplace": {
      "url": "https://payapi.market/mcp"
    }
  }
}

Remote endpoints

https://payapi.market/mcpstreamable-http

What it can do

Tool inventory

Tools (3)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢search_apis(query, verified_only, limit)

Free-text search across the live catalogue. Matches listing name, description, category and provider name. Returns settlement-verified listings only unless verified_only is false. Free and read-only; spends nothing.

Input Schema

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "What you are looking for, e.g. \"uk property\" or \"sanctions screening\"."
    },
    "verified_only": {
      "type": "boolean",
      "default": true,
      "description": "Restrict to settlement-verified listings. Default true."
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100,
      "default": 20
    }
  },
  "required": [
    "query"
  ],
  "additionalProperties": false
}
🟢list_apis(category, verified_only, limit)

Browse the live catalogue, optionally filtered to one category. Omit category for everything. Returns settlement-verified listings only unless verified_only is false. Free and read-only; spends nothing.

Input Schema

{
  "type": "object",
  "properties": {
    "category": {
      "type": "string",
      "description": "Exact category name. Call with no category first to see the valid values."
    },
    "verified_only": {
      "type": "boolean",
      "default": true
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100,
      "default": 50
    }
  },
  "additionalProperties": false
}
🟢get_api(id)

Fetch a single live listing by its id or slug, including base_url, price range, network and verification state. Also returns a reliability object: score (0 to 100 or null), band (strong, established, thin, caution or unscored) and computed_at. Reliability is a running score from paid verifications, health history and payTo integrity, not a star rating and not a guarantee; unscored means it has not been computed for that listing yet. Method: https://payapi.market/how-an-agent-finds-payapi. Returns the listing whether or not it is verified, and reports payment_verified honestly. Free and read-only; spends nothing.

Input Schema

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Listing uuid or slug, as returned by search_apis or list_apis."
    }
  },
  "required": [
    "id"
  ],
  "additionalProperties": false
}

Recommended Prompts

search_research
Search for information about [topic] using PayAPI Market
Expected tools: search_apis
find_specific
Find [specific item] using PayAPI Market
Expected tools: search_apis
retrieve_data
Get details about [item] from PayAPI Market
Expected tools: get_api
fetch_info
Fetch [information type] using PayAPI Market
Expected tools: get_api
list_items
List all [items] available in PayAPI Market
Expected tools: list_apis

Community

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Evidence

Recent observations

verifiedversion not recorded3 tools
verifiedversion not recorded3 tools