whatagentsbuy-com

What Agents Buy API API

Independent trust, discovery and delivery data for the APIs behind agentic commerce. Free JSON endpoints plus one paid x402 lookup. No key required for the free data.

GitHub OpenAPI

Operations 9

GET /x402/service Everything known about one x402 seller, by host
GET /api/catalog.json Every payable endpoint, searchable, with price, chains, reliability and delivery
GET /api/probe.json The whole directory checked free: who answers, price and payTo honesty, reliability
GET /api/delivery.json Paid delivery checks: does the API return what it promised, with the real response shape
GET /api/leaderboard.json Who actually gets paid, cross-chain (Base + Solana)
GET /api/ratings.json Grades earned by paying each service
GET /api/receipts.json Dispute receipts: one self-verifying record per paid call, promise vs delivery with a three-level verifiable verdict
GET /api/preflight.json Preflight: one CLEAR/HOLD/ABORT pre-payment verdict per seller, the check an agent runs before the 402
GET /api/categories.json The accuracy corpus: every objective-category seller graded against a primary source, ranked by deviation then price

Specifications

⚙
OpenAPI
https://artifacts.apis.io/whatagentsbuy-com/openapi/_original/whatagentsbuy-com-api-openapi.json

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OpenAPI Specification

whatagentsbuy-com-api-openapi.json Raw ↑ 
{
 "openapi": "3.1.0",
 "info": {
  "title": "What Agents Buy API",
  "version": "1.0.0",
  "description": "Independent trust, discovery and delivery data for the APIs behind agentic commerce. Free JSON endpoints plus one paid x402 lookup. No key required for the free data.",
  "license": {
   "name": "CC BY 4.0"
  },
  "contact": {
   "url": "https://whatagentsbuy.com"
  }
 },
 "servers": [
  {
   "url": "https://whatagentsbuy.com"
  }
 ],
 "paths": {
  "/x402/service": {
   "get": {
    "summary": "Everything known about one x402 seller, by host",
    "description": "Grade earned by paying, live-vs-listed price honesty, payTo stability, demand shape, Organic Demand Score and delivery verification for one host. Paid $0.001 USDC on Base via x402; the free bulk data is at /api/catalog.json.",
    "parameters": [
     {
      "name": "host",
      "in": "query",
      "required": true,
      "schema": {
       "type": "string"
      },
      "example": "blockrun.ai"
     }
    ],
    "x-402": {
     "price": "0.001",
     "currency": "USDC",
     "network": "eip155:8453",
     "payTo": "0xC533Bf5268A2F64aDDe58dcE380651f70Aa92D7A"
    },
    "responses": {
     "200": {
      "description": "Seller trust and delivery record"
     },
     "402": {
      "description": "Payment required (x402 challenge)"
     }
    }
   }
  },
  "/api/catalog.json": {
   "get": {
    "summary": "Every payable endpoint, searchable, with price, chains, reliability and delivery",
    "responses": {
     "200": {
      "description": "The payable market"
     }
    }
   }
  },
  "/api/probe.json": {
   "get": {
    "summary": "The whole directory checked free: who answers, price and payTo honesty, reliability",
    "responses": {
     "200": {
      "description": "Probe results"
     }
    }
   }
  },
  "/api/delivery.json": {
   "get": {
    "summary": "Paid delivery checks: does the API return what it promised, with the real response shape",
    "responses": {
     "200": {
      "description": "Delivery verifications"
     }
    }
   }
  },
  "/api/leaderboard.json": {
   "get": {
    "summary": "Who actually gets paid, cross-chain (Base + Solana)",
    "responses": {
     "200": {
      "description": "Settlement leaderboard"
     }
    }
   }
  },
  "/api/ratings.json": {
   "get": {
    "summary": "Grades earned by paying each service",
    "responses": {
     "200": {
      "description": "Ratings"
     }
    }
   }
  },
  "/api/receipts.json": {
   "get": {
    "summary": "Dispute receipts: one self-verifying record per paid call, promise vs delivery with a three-level verifiable verdict",
    "responses": {
     "200": {
      "description": "The dispute ledger"
     }
    }
   }
  },
  "/api/preflight.json": {
   "get": {
    "summary": "Preflight: one CLEAR/HOLD/ABORT pre-payment verdict per seller, the check an agent runs before the 402",
    "responses": {
     "200": {
      "description": "Pre-payment verdicts by host"
     }
    }
   }
  },
  "/api/categories.json": {
   "get": {
    "summary": "The accuracy corpus: every objective-category seller graded against a primary source, ranked by deviation then price",
    "responses": {
     "200": {
      "description": "Per-category accuracy leaderboards"
     }
    }
   }
  }
 },
 "x-mcp": {
  "url": "https://whatagentsbuy.com/mcp",
  "transport": "streamable-http",
  "install": "claude mcp add --transport http whatagentsbuy https://whatagentsbuy.com/mcp"
 }
}