Payments on Base + Solana
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Is this x402 API safe to pay? Paste the endpoint URL and see its grade, uptime, price and payout-wallet history, and whether it delivered when we paid it. Free, no sign-up.
125,957 x402 endpoints graded so far. Or browse every seller.
A to F, and proceed, caution or avoid, refreshed every monitoring cycle.
We pay endpoints the listed price and check the response against the listing, with signed receipts.
Raised prices and swapped payout wallets show up before your agent pays.
Cheaper copies of known sellers with a different wallet get flagged.
Before paying a 402 quote, send the endpoint and the quote's terms. Pay only if allow is true:
curl -X POST https://lumierepaycheck.org/v1/check-payment -H "content-type: application/json" \
-d '{"url":"https://api.seller.example/data","amount":"10000","payTo":"0xSELLER_WALLET","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}'Same thing over MCP with the check_payment tool. Integration guide · MCP server
Paste its URL above. You get a grade from A to F and a verdict (proceed, caution or avoid) built from checks about every 30 minutes and real paid tests across 125,957 endpoints. An agent can do the same with the free check_payment tool, using the exact amount and payTo from the 402 quote.
Whether the endpoint answers with a valid x402 quote, how often it's up, its response time, whether its price or payout wallet changed, whether it looks like an imitation of a known seller, and whether it delivered what its listing promised when we paid it.
Look it up anyway. If it answers with a real x402 quote, we add it to the catalog and start checking it, whether or not it's listed in the x402 Bazaar.
Yes. Lookups on the site, the API (60 requests a minute without a key, more with a free key) and the MCP server are all free.
The Bazaar helps agents find endpoints and ranks them by usage. It doesn't pay them to check the response. Read the x402 Bazaar vs. a trust layer.