Payments on Base + Solana
usaref.dev has 19 x402 endpoints in our catalog. Right now: 11 proceed, 8 caution. 11 passed a real paid test: we paid the listed price and got what the listing promised. Best grade: B.
Best grades first. Open an endpoint for its full history: uptime, price and payout-wallet changes, and paid-test results with signed receipts.
| Endpoint | Grade | Verdict | Uptime (7 days) | Response time | Paid test passed |
|---|---|---|---|---|---|
| /v1/all | B | Proceed | 90% | 1,610 ms | Yes |
| /v1/answers/employment-cost | B | Proceed | 91% | 1,682 ms | Yes |
| /v1/answers/income-tax | B | Proceed | 91% | 1,582 ms | Yes |
| /v1/answers/settlement-date | B | Proceed | 91% | 1,683 ms | Yes |
| /v1/answers/statutory-interest | B | Proceed | 92% | 1,704 ms | Yes |
| /v1/answers/vat | B | Proceed | 92% | 1,602 ms | Yes |
| /v1/answers/wage-check | B | Proceed | 91% | 1,570 ms | Yes |
| /v1/answers/working-days | B | Proceed | 91% | 1,586 ms | Yes |
| /v1/compare | B | Proceed | 92% | 1,535 ms | Yes |
| /v1/vat/determine | B | Proceed | 91% | 1,502 ms | Yes |
| /v1/taxid/validate | B | Proceed | 92% | 1,512 ms | Yes |
| /v1/jobs/charge-sale | C | Caution | 92% | 1,541 ms | – |
| /v1/jobs/charge-sale/certified | C | Caution | 92% | 1,486 ms | – |
| /v1/jobs/cost-hire | C | Caution | 91% | 1,514 ms | – |
| /v1/jobs/evidence-pack | C | Caution | 92% | 1,428 ms | – |
| /v1/jobs/hire-compare | C | Caution | 91% | 1,496 ms | – |
| /v1/jobs/hire-compare/multi | C | Caution | 92% | 1,494 ms | – |
| /v1/jobs/invoice-payable | C | Caution | 92% | 1,517 ms | – |
| /v1/jobs/next-filings | C | Caution | 91% | 1,484 ms | – |
11 of usaref.dev's endpoints are rated Proceed: reliable in monitoring with a stable price and payout wallet, and the best ones delivered in a real paid test. Grades are per endpoint, so look up the one your agent is about to pay.
Lumière PayCheck checks every endpoint about every 30 minutes: does it answer with a valid x402 quote, is the price and payout wallet stable. Then we pay some of them for real and check the response against what the listing promised. Failures are re-tested before they count. How it works.
Yes, for free. Call check_payment (API or MCP) with the endpoint, amount and payTo from the 402 quote, and pay only if it returns allow. Check an endpoint now.