# What Agents Buy API API

**Canonical:** https://apis.io/apis/whatagentsbuy-com/what-agents-buy-api-api/  
**Provider:** whatagentsbuy-com — https://apis.io/providers/whatagentsbuy-com/  
**Base URL:** https://whatagentsbuy.com  
**Documentation:** https://whatagentsbuy.com/openapi.json

What Agents Buy API API is one of 2 APIs that [whatagentsbuy-com](https://apis.io/providers/whatagentsbuy-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. The published artifact set on APIs.io includes an OpenAPI specification.

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.

## Operations (9)

| Method | Path | Summary |
|---|---|---|
| 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 |

## Machine-readable artifacts (1)

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

## Other whatagentsbuy-com APIs (1)

- [What Agents Buy API](https://apis.io/apis/whatagentsbuy-com/what-agents-buy-api/)

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/whatagentsbuy-com/what-agents-buy-api-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/whatagentsbuy-com/.