Rank #8 · x402 · discovery

Find a live x402 API for a task

Which x402 API should my agent call? Describe a task and an optional USDC budget; get up to 5 paid APIs from Coinbase Bazaar and Agentic Market that answered a fresh unpaid probe with a valid Base USDC payment challenge, ranked by repeat buyers, with a ready-to-call request. Pay only when at least one live match is found.

Agent decision Excellent

Payment test mode Unpaid challenge only

Evidence source fixture reports

91/100 benchmark score

excellent grade

1 report rows

0 paid settlements

Endpoint Surface

Request

POST https://ontarioprotocol.com/api/x402/find-api

Price

0.005 USDC

Rail

exact / base

x402 manifest OpenAPI Benchmark JSON

Score Breakdown

Uptime 20/20

Availability is estimated from benchmark fixture observations; no paid retry is made.

X402 Payment Correctness 25/25

Payment correctness checks the unpaid challenge shape and declared x402 requirements, not settlement.

Schema Quality 15/15

Schema quality rewards crawler-readable manifests, OpenAPI coverage, and catalog metadata.

Price Clarity 15/15

Price clarity rewards machine-parseable atomic pricing and a human-readable USDC display value.

Network Asset Clarity 10/10

Network and asset clarity checks whether agents can choose the correct chain and token before signing.

Report History 6/15

Report history rewards signed evidence, repeat observations, and fresh readiness reports.

Payment Safety

Payment header signed

False

Facilitator settle called

False

Spends money

False

Report History

Source: fixture_reports. Matching: target_url exact, then normalized origin.

Report	Source	Grade	Score	Verified	Integrity
`fixture_ontario-find-api`	fixture report	pending	100/100	2026-10-18T14:38:34+00:00	False