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Is JsonMend reliable?

Reliable (measured) Yes. Faceabot measured JsonMend 13 times: 100% of checks succeeded, including the last 13 in a row (last check 2026-10-19 10:10 UTC). It answers, but its real task has not worked yet (0/13 real results): see "Does it actually do the job?" below.

Last check: 2026-10-19 10:10 UTC · answered in 7069 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Repair broken JSON from LLM output and validate it against a JSON Schema.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 0.1.3 · publisher website
Connect your agent
{
  "mcpServers": {
    "jsonmend": {
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp"
    }
  }
}
Or ask Faceabot first: MCP tool check_reliability {"id":"dev.workers.mike-tusa.jsonmend/jsonmend"} on https://faceabot.com/api/mcp.
Does it actually do the job?

Fails real tasks — Faceabot asked repair_json to do a small read-only task 13 time(s): 0 returned a real result. Last result: tool_error (the tool answered with an error for the neutral sample input) in 2651 ms.

Sample input: {"input":"hello world"}. A success means a non-empty result without error; it does not certify the accuracy or safety of the content.
Other proven tools for the same job

FixMyJSON Reliable (measured) · 100%
Repair broken LLM JSON and check it against a JSON Schema. Flags cut-off output. Free trial. · https://fixmyjson-api.onrender.com/mcp

json-repair-mcp Reliable (measured) · 100%
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, unquoted keys). · https://json-repair-72343955726.us-central1.run.app/mcp/json-repair

jsonaut Reliable (measured) · 100%
Repair malformed JSON from LLM/agent output; optional JSON Schema coercion. Free + x402 paid. · https://jsonaut.jsonaut-shaurya.workers.dev/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…
Faceabot measurements
WhenAnswersReal taskLatency
2026-10-19 10:10 UTC✅ ok❌ tool_error7069 ms
2026-10-18 17:20 UTC✅ ok❌ tool_error8215 ms
2026-10-18 05:40 UTC✅ ok❌ tool_error6465 ms
2026-10-17 21:45 UTC✅ ok❌ tool_error5458 ms
2026-10-17 13:15 UTC✅ ok❌ tool_error6405 ms
2026-10-17 05:35 UTC✅ ok❌ tool_error5475 ms
2026-10-16 21:50 UTC✅ ok❌ tool_error4520 ms
2026-10-16 14:40 UTC✅ ok❌ tool_error6736 ms
2026-10-16 07:40 UTC✅ ok❌ tool_error6856 ms
2026-10-16 00:45 UTC✅ ok❌ tool_error7467 ms
2026-10-15 17:51 UTC✅ ok❌ tool_error6518 ms
2026-10-15 11:06 UTC✅ ok❌ tool_error4636 ms
2026-10-15 04:30 UTC✅ ok❌ tool_error4022 ms
Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

Find tools similar to JsonMend →

Publisher of JsonMend?

Show your measured reliability on your README or website:

Faceabot reliability badge for JsonMend

[![Measured by Faceabot](https://faceabot.com/badge/dev.workers.mike-tusa.jsonmend/jsonmend.svg)](https://faceabot.com/tools/dev.workers.mike-tusa.jsonmend/jsonmend)
Data in JSON: /api/catalog?id=dev.workers.mike-tusa.jsonmend/jsonmend · Stop probes: POST /api/reliability/opt-out

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