Schemaguard MCP server

by sethclawd-prog·io.github.sethclawd-prog/schemaguard·v0.1.2

API Schema Drift Monitor — detect breaking changes in OpenAPI specs

B72/100grade B

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Safety scan

B72/100

Adoption

New

0 stars28 downloads/wk

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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.

schemaguard_check
CI-style check: compare spec against baseline and report if breaking changes exist. Returns a clear pass/fail verdict.
schemaguard_diff
Compare two OpenAPI specs and detect breaking vs non-breaking changes. Use when reviewing API changes, validating PRs that modify API specs, or checking backward compatibility.
schemaguard_lint
Validate an OpenAPI spec for quality issues. Checks for missing operationIds, descriptions, security schemes, etc.

scanner v0.1.10 · 2026-09-28 · same rubric, same numbers if you re-run it

no findings

Code scan14 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 220 days ago4/15
Maintainer identityregistry namespace matches repository owner6/10

Overall 72/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 72/100; higher than 38% of 48,255 servers
Tools: 3; the typical server has 7
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
Downloads a week: 28; more than 15% of 12,191 servers with a package

What its tools let an agent do: 3 read

Runs npx -y @sethclawd/schemaguard on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add schemaguard -- npx -y @sethclawd/schemaguard

Is Schemaguard MCP server safe?: Mostly: it is graded B (72/100). Read the Schemaguard safety report
How do I install Schemaguard?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Schemaguard need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Schemaguard maintained?: The last commit was 257 days ago (2026-02-21). The latest release is v0.1.2.
How does Schemaguard compare with other MCP servers?: safety score 72/100 (higher than 38% of 48,255 servers); tools 3 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.