passmcp-serverSAFE
An MCP server exposing passmcp's diagnostics as read-only tools: evaluate an MCP server, or verify an attestation, from inside the agent.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
passmcp-server
passmcp, the Model Context Protocol server diagnostic, as MCP tools — so an agent can evaluate a server, or check an attestation about one, from inside the editor. Read-only, allowlisted, and it never sends a credential.
8187b80ba22cOBSERVED · 2026-10-11Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add passmcp-server:0.0.5 -- docker run -i --rm ghcr.io/sebastienrousseau/passmcp-server:0.0.5:None
Trust audit
SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | PASS |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (1 observation(s))
- Network
- declared (3 observation(s))
- Shell
- none-observed
- Dependencies
- pinned
- Secrets in source
- none-found
Findings (11)
.codespellrc
.compliance.yml
.gitleaks.toml
.golangci.yml
.goreleaser.yaml
Type "passmcp call --stdio passmcp_check --arg endpoint=http://127.0.0.1:17802/mcp -- passmcp-server" Sleep 400ms Enter
`http://127.0.0.1:3000/mcp`, ask the agent:
> Evaluate my MCP server at <http://127.0.0.1:3000/mcp> with passmcp and fix what fails.
`passmcp check http://127.0.0.1:3000/mcp --auth none --output json` and
{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"passmcp_check","arguments":{"endpoint":"http://127.0.0.1:3000/mcp","phases":["handshake","catalog"]}}}Gates applied: no_behavioural_pass.
8187b80ba22cfull audit observations/trust-audit/mcp-server/sebastienrousseau__passmcp-server.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-11 | 8187b80ba22c | SAFE | B | 89 | first audit |
Questions
What is the passmcp-server MCP server?
An MCP server exposing passmcp's diagnostics as read-only tools: evaluate an MCP server, or verify an attestation, from inside the agent.
Is passmcp-server safe to connect to an agent?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.
What credentials does passmcp-server need?
No credential environment variables were found in its source, so it appears to need none.
How does passmcp-server run?
It speaks stdio, so it runs as a local process your client starts.
How current is this page?
The grade is for one exact copy of the source (8187b80ba22c), read on 2026-10-11. The repository is watched and re-audited when it changes.