Mmcp.market

Is Blackwall X402 Guardrail MCP server safe?

Yes, with the usual care.

A87/100grade A

Passed every safety check we run. Maintained, authenticated, reachable, clean scan.

No critical or high findings in the latest scan.

Public scan report

scanner v0.1.9 · 2026-09-21 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 188ms20/20
  • Tool poisoning1 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 27 days ago15/15
  • Maintainer identitynamespace and repository owner differ; website matches verified namespace5/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Other servers that do what Blackwall X402 Guardrail does

  • POPCORN MCP
    Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
    B
  • Pulse Verity
    Read crypto reference prices and verify signed receipts. Includes limited keyless samples.
    B
  • X402 Payment Safety
    Authorize x402 payments before signing with request-bound, signed safety decisions.
    A

Blackwall X402 Guardrail reviews, tools and install