x402 Precheck is answering right now. Last checked 12 min ago. It exposes 1 tools.
Check an x402 payment challenge before your agent pays: network, USDC, amount, payTo, facilitator.
Today is the operative word: we check x402 Precheck every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.
claude mcp add precheck --transport http https://x402-precheck.w0arvg81zlgf.workers.dev/mcp
https://x402-precheck.w0arvg81zlgf.workers.dev/mcp
[mcp_servers.precheck]
url = "https://x402-precheck.w0arvg81zlgf.workers.dev/mcp"
{
"mcpServers": {
"precheck": {
"url": "https://x402-precheck.w0arvg81zlgf.workers.dev/mcp"
}
}
}
{
"servers": {
"precheck": {
"type": "http",
"url": "https://x402-precheck.w0arvg81zlgf.workers.dev/mcp"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
x402_precheck
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://x402-precheck.w0arvg81zlgf.workers.dev/mcp | streamable-http | answering | 260 ms | 12 min ago |
Find and vet x402 payment APIs before your agent pays one: uptime, price, on-chain volume.
Check an x402 endpoint's payment challenge and discovery metadata before paying.
Check x402 endpoints before your AI agent pays: grades, payment checks, refunds, receipts.
Check tokens, pages and x402 payments before your agent trusts them. Offline verdicts.
Check supported assets and verify x402 payments on Celo
Verified directory for machine payments (x402 & MPP): check services and wallets before agents pay.
Check x402 endpoint reliability on Algorand before an agent routes a payment there.
Pre-payment merchant trust checks for x402 agents on Base and Solana.
Answers built from our own checks of this server.