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Json Tools MCP server

by mrfentmen·io.github.mrfentmen/json-tools-mcp·v1.0.0
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Validate, format, and inspect JSON locally. No network and no key.

C65/100grade C
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Safety scan
C65/100

full report

Adoption
Not measured yet

Usage numbers are collected on the next scan

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

Json Tools tools (3)

write = sends, deletes, buys or posts

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

  • format_json

    Pretty print a JSON string.

  • json_info

    Return the top level type and key count of JSON.

  • validate_json

    Check if a string is valid JSON and report errors.

Public scan report

scanner v0.1.9 · 2026-09-22 · 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
  • Maintenancerepository not readable: repo not found3/15
  • Maintainer identityno repository or website to verify2/10
Overall 65/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install directly

Runs npx -y json-tools-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add json-tools-mcp -- npx -y json-tools-mcp
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Json Tools: common questions

Is Json Tools MCP server safe?
With care: it is graded C, so read the findings first (65/100). Read the Json Tools safety report
How do I install Json Tools?
It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.
Does Json Tools need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Json Tools maintained?
The latest release is v1.0.0.
What can I use instead of Json Tools?
Servers from other publishers that do the same job: Semiotic MCP server, Firefox DevTools MCP server and Compartment MCP server. Compare all Json Tools alternatives.

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