X402 Payment Safety MCP server

• guild_x402_payment_safetyFree

  PAID. Call this immediately BEFORE signing an x402 payment envelope. Returns one short-lived, Guild-signed AGPD-1 allow/block credential bound to the exact target payment: scheme, CAIP-2 network, asset contract, atomic amount, payee and resource URL, plus optional capability and policy thresholds. Verify it offline with POST /wallet-binding/decision/verify. This is the native MCP transport for the existing HTTP POST /wallet-binding/decision product. An unpaid call returns a complete x402 v2 challenge for the exact request digest. Retry with the official ``_meta['x402/payment']`` carrier; adapters that cannot set request metadata may pass the identical signed PaymentPayload as ``x402_payment``. Conflicting carriers fail closed before facilitator verification or settlement. The decision is issued before metering, so malformed inputs or signing failures are never charged. ``api_key`` uses sandbox credits and is never external revenue. The free identity-only alternative is GET /wallet-binding/resolve.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 717ms20/20
• Tool poisoning1 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancelast push 4 days ago15/15
• Maintainer identityregistry namespace matches repository owner6/10

X402 Payment Safety: common questions

Is X402 Payment Safety MCP server safe?

Yes, by our scan: it is graded A (88/100). Read the X402 Payment Safety safety report

How do I install X402 Payment Safety?

It runs remotely at agent-guild-5d5r.onrender.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does X402 Payment Safety need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is X402 Payment Safety maintained?

The last commit was 4 days ago (2026-09-15). The latest release is v2.7.0.

Is X402 Payment Safety up?

100% of our last 2 checks got an answer. We check remote servers about four times a day.

What can I use instead of X402 Payment Safety?

Servers from other publishers that do the same job: PipRail MCP server, POPCORN MCP server and X402 Data Gateway MCP server. Compare all X402 Payment Safety alternatives.