Paid API Benchmark Lab

x402 Paid API Benchmarks

This view filters the benchmark lab to x402 endpoints only. It is safe for agents to crawl because the scoring path never signs or settles a payment.

5matching endpoints

87.0average score

4ready or better

0paid settlements

What Ontario offers

A pre-payment evidence layer for agent APIs.

Ontario turns paid API claims into crawlable proof: discovery surfaces, unpaid x402 checks, benchmark scoring, comparisons, and machine-readable datasets.

Discovery surface Agents can inspect the paid API before signing anything.

#1 · x402 Valid x402 Paid API Fixture 98/100 · excellent #2 · x402 Ontario Agent Trust Scan 95/100 · excellent #3 · x402 Header-Only x402 Fixture 93/100 · excellent

Compare endpoints Machine endpoint

Benchmark table Open JSON

Rank	Endpoint	Score	Grade	Evidence	Price	Network
#1	Valid x402 Paid API Fixture Ontario Fixture Lab · `POST https://valid.example/api/paid`	98/100	excellent	x402 25/25 schema 15/15 3 reports	0.01 USDC	`base` `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`
#2	Ontario Agent Trust Scan Ontario Protocol · `POST https://ontarioprotocol.com/api/x402/agent-trust-scan`	95/100	excellent	x402 25/25 schema 15/15 2 reports	0.01 USDC	`base` `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`
#3	Header-Only x402 Fixture Ontario Fixture Lab · `POST https://header-only.example/api/paid`	93/100	excellent	x402 25/25 schema 13/15 2 reports	0.01 USDC	`base` `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`
#4	Ontario Agent Reputation Ontario Protocol · `GET https://ontarioprotocol.com/api/x402/reputation/test-id`	90/100	excellent	x402 25/25 schema 13/15 1 reports	0.001 USDC	`base` `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`
#5	Invalid x402 Common Mistakes Fixture Ontario Fixture Lab · `POST https://invalid.example/api/paid`	59/100	needs work	x402 16/25 schema 11/15 2 reports	$0.01	`base` `asset missing`

JSON: /api/benchmarks?protocol=x402 Well-known: /.well-known/paid-api-benchmarks.json Methodology: score weights