Mettle MCP server

by Creed-Space·io.github.Creed-Space/mettle-mcp·v0.5.2

Experimental machine-oriented challenges and signed results. Does not verify identity or substrate.

A86/100grade A

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A86/100

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

write = sends, deletes, buys or posts

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

mettle_get_round_feedback
Read the recorded feedback for one completed novel-reasoning round.
mettle_list_suites
List authenticated METTLE suites and their availability.

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

1 medium

Code scan28 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 6 days ago15/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year9/10

mediumeval / new Function usedexec.eval

mettle_verifier-0.5.2/mettle/legacy_session_store.py: ….shield( self.redis.eval( _LOCK_RELEASE_S…

Overall 86/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

claude mcp add mettle-mcp -- uvx mettle-verifier

Is Mettle MCP server safe?: Yes, by our scan: it is graded A (86/100). Read the Mettle safety report
How do I install Mettle?: It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.
Does Mettle need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Mettle maintained?: The last commit was 7 days ago (2026-09-14). The latest release is v0.5.2.