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Semahash MCP server

by emergent-wisdom·io.github.emergent-wisdom/semahash·v0.5.5
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Content-addressed semantics: fail-closed handshakes over 457 cognitive patterns.

B83/100grade B
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Safety scan
B83/100

full report

Adoption
Growing

13 stars

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

Semahash tools (13)

write = sends, deletes, buys or posts

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

  • sema_graph_skeleton

    Ultra-minimal graph overview (~150 tokens). Shows regions, hubs, and recent activity.

  • sema_handshake

    Byte-level definition agreement check between two agents.

  • sema_lookup

    Lookup a pattern by its Sema reference (Handle#stub).

  • sema_propose_context

    Propose a shared definition set for multi-agent coordination.

  • sema_reset_session

    Reset the session pattern cache.

  • sema_resolve

    Get a pattern with its dependencies expanded.

  • sema_root

    Get both aggregate roots of the active vocabulary.

  • sema_search

    Search Sema patterns by name, description, or meaning (semantic search).

  • sema_stats

    Get statistics about the Sema vocabulary.

  • sema_tree

    Browse the vocabulary structure organized by layer and category.

  • sema_use

    Switch the active vocabulary database without restarting.

  • sema_validate

    Validate a pattern JSON using the same rules as the mint pipeline.

  • sema_verify_context

    Verify a semantic context proposed by another agent.

Public scan report

scanner v0.1.9 · 2026-09-20 · same rubric, same numbers if you re-run it

1 medium
  • Code scan515 source files scanned20/25
  • –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 9 days ago15/15
  • Maintainer identityregistry namespace matches repository owner7/10

Findings (1)

  • mediumeval / new Function usedexec.eval
    semahash-0.5.5/src/sema/server/static/assets/GraphPage-2VgYBBGA.js: …n;function e(s,a){let o=t(s,a),{Body:l}=new Function(o)();return l}function t(s,a){return` ${…
Overall 83/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install directly

claude mcp add semahash -- uvx semahash
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Semahash: common questions

Is Semahash MCP server safe?
Mostly: it is graded B (83/100). Read the Semahash safety report
How do I install Semahash?
It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.
Does Semahash need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Semahash maintained?
The last commit was 10 days ago (2026-09-10). The latest release is v0.5.5.

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