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Passage Protocol MCP server

by hawthornhollows·io.github.hawthornhollows/passage-protocol·v0.1.7
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Departure and admission records for AI agents with Ed25519/P-256 signatures.

C69/100grade C
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Safety scan
C69/100

full report

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If you have run it, two minutes of your experience saves the next person an afternoon.

Passage Protocol tools (9, 2 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • counter_sign_exit_marker

    Add a counter-signature to a signed EXIT marker, attesting agreement with the departure record

  • create_exit_markerwrite action

    Create and sign a departure marker. Uses session identity or generates a new one.

  • evaluate_admission

    Check whether an EXIT marker meets an admission policy without creating an arrival

  • generate_identity

    Generate a new Ed25519 DID keypair for signing EXIT markers

  • list_admission_policies

    List available admission policy presets and their configurations

  • quick_exit

    One-shot create and sign a departure marker. Generates a new identity if none exists.

  • verify_and_admit

    Verify an EXIT marker, evaluate an admission policy, and create a signed arrival marker

  • verify_exit_marker

    Verify a signed EXIT marker from its JSON representation

  • verify_transferwrite action

    Verify a complete EXIT→ENTRY transfer: check both markers and continuity

Public scan report

scanner v0.1.10 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings
  • Code scan5 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 202 days ago4/15
  • Maintainer identitynamespace and repository owner differ4/10
Overall 69/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install Passage Protocol in Claude Code, Cursor or VS Code

Runs npx -y @cellar-door/mcp-server on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add passage-protocol -- npx -y @cellar-door/mcp-server
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Passage Protocol: common questions

Is Passage Protocol MCP server safe?
With care: it is graded C, so read the findings first (69/100). Read the Passage Protocol safety report
How do I install Passage Protocol?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Passage Protocol need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Passage Protocol maintained?
The last commit was 217 days ago (2026-03-10). The latest release is v0.1.7.

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