MCP Observatory
2m ago Tracked 26,747 Last 2m ago 24h 1,611
npm JavaScript analyzed 0.1.1

402coffee-mcp

v0.1.1
npm

MCP server for 402.coffee — the trust layer for agent payments (x402 on Base). Free tools: verify any agent's credential (with offline Ed25519 signature check), browse the conformance menu, read the arbiter policy. Paid tools (x402 USDC, non-custodial loc

maintainer
englishdoggy
license
MIT
first seen
2026-07-11
last seen
2026-07-29
releases · 30d
2
short id
risk 28/100 · heuristic grade
B low
  • capability exposure inferred + 24
  • inherited (deps) attested + 15
  • trust mitigators mixed − 11

attested inferred mixed

The A–E grade is our heuristic synthesis — a "review this" prompt, not a verdict. Each factor is tagged by what backs it: attested (a verifiable record), reported (a third party's claim), or inferred (our own heuristic, e.g. permissions). See methodology.

graded 9m ago · see ecosystem CVEs →

risk trajectory 2 movements
  • A · 4 → B · 28
  • A · 0 → A · 4
capability exposure grade factor +24
Inferred surface — each links to servers holding it:
vulnerabilities 0 CVEs

No known CVEs for this server.

inherited (deps) · grade factor +15

inherited via dependencies 3
HIGH
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse via @modelcontextprotocol/sdk · 1 hop CVE-2026-25536 fixed in 1.26.0
HIGH
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability via @modelcontextprotocol/sdk · 1 hop CVE-2026-0621 fixed in 1.25.2
HIGH
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default via @modelcontextprotocol/sdk · 1 hop CVE-2025-66414 fixed in 1.24.0
tool safety 2 findings · grade factor +0
  1. low dangerous code

    env-secret-flows-to-network-js: A process environment value (often a secret/token) flows into a network call — possible credential exfiltration. (package/index.js:36)

  2. low dangerous code

    env-secret-flows-to-network-js: A process environment value (often a secret/token) flows into a network call — possible credential exfiltration. (package/index.js:46)

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Heuristic, inferred signals — false positives (legitimately powerful tools, forks, language ports) are expected. Treat each as "review this", not a verdict. See the ecosystem-wide picture on the security hub, or the fleet security of englishdoggy.