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Directory / Mend

Mend

Q: Is Mend MCP server safe?

QAmcp's test on 2 Nov 2026: None of the hidden-instruction wordings we know were found in its tool descriptions. Its error messages showed no secrets or internal details. All 4 of its tools are labeled read-only. Overall it scored 95/100 on 2 Nov 2026. A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

by mend.clawhard.com · https://mend.clawhard.com/mcp

Repair broken JSON without changing values, find the exact error, outline or query big payloads.

4 tools✓ all read-only✓ no account neededPricing: not listed

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95 /100

PASS · WITH NOTES

12 of 12 checks · 2 Nov 2026

Is Mend MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
Its error messages showed no secrets or internal details.
All 4 of its tools are labeled read-only.
Overall it scored 95/100 on 2 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What it can do

4 tools, in the server's own words.

mend_repair_jsonread-only

Use when JSON from an LLM, API, log, config or copy-paste fails to parse (JSON.parse error, "Unexpected token", "Expecting property name"), or the user pastes …

mend_check_jsonread-only

Use when you need to know whether text is strictly valid JSON, and if not, exactly where it breaks.

mend_outline_jsonread-only

Use before reading a big JSON response, log or export into context: returns a compact outline of the structure (keys, types, array lengths, one example per rep…

mend_query_jsonread-only

Use when you need specific fields from a JSON document without reading all of it: $.users[0].name, $.items[*].id, $.a.b[-1], $.list[1:3], $..email (recursive).

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
✓
ConnectsConnected in 222 ms
pass
✓
Lists its toolsFound 4 tools
pass
✓
Every tool is describedAll 4 tools and their inputs are described
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Tools work with good inputs
All good
- ✓mend_repair_json: Answered with an error, probably because of our sample input: No JSON found. Expected an object { } or array [ ].
- ✓mend_check_json: Worked (57 ms)
- ✓mend_outline_json: Answered with an error, probably because of our sample input: No JSON found. Expected an object { } or array [ ].
- ✓mend_query_json: Answered with an error, probably because of our sample input: No JSON found. Expected an object { } or array [ ].
pass
✓
Bad inputs give a clean error
All good
- ✓mend_repair_json: Refused missing required input "text" with a clear error
- ✓mend_repair_json: Refused wrong type for "text" with a clear error
- ✓mend_check_json: Refused missing required input "text" with a clear error
- ✓mend_check_json: Refused wrong type for "text" with a clear error
- ✓mend_outline_json: Refused missing required input "text" with a clear error
- ✓mend_outline_json: Refused wrong type for "text" with a clear error
- ✓mend_query_json: Refused missing required input "text" with a clear error
- ✓mend_query_json: Refused wrong type for "text" with a clear error
pass
✓
Fast enough
All good
- ✓Connecting took 222 ms
- ✓Listing tools took 46 ms
- ✓Average tool answer: 43 ms
- ✓mend_check_json: Slowest tool: mend_check_json (57 ms)
pass
✓
No secrets leakedChecked 11 error messages: no secrets or internal details
pass
✓
Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guide
pass
✓
Resources and prompts work
All good (6 resources, 1 prompt)
- ✓Opened 6 of 6 resources
- ✓An address that does not exist gets a clean "not found" error
- ✓Opened 1 of 1 prompts
pass
–
Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://mend.clawhard.com/mcp

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[![QAmcp score](https://qamcp.dev/s/com-clawhard-mend.svg)](https://qamcp.dev/s/com-clawhard-mend.html)

Score over time

2 Nov 202695

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Mend, signed in with GitHub, one per person. Reviews never change the score.

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