Mend MCP

Mend is an MCP server that repairs broken JSON syntax (trailing commas, single quotes, comments, cut-off output) without altering data values, validates strict JSON, outlines large payloads, and queries specific fields by path. It runs in the browser with no account required.

Visit Clawhard Studio

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-02Operated by Clawhard Studio

MCP endpoint (Streamable HTTP)

https://mend.clawhard.com/mcp

Vendor documentation

What its tools do

4 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

4 of 4 have a description · 4 of 4 declare behavior hints · 4 of 4 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 2, 2026, 9:52 PM UTC
Passed Official MCP Registry namespace is tied to clawhard.com · Nov 2, 2026, 9:49 PM UTC
Passed Endpoint is on the registry namespace domain · Nov 2, 2026, 9:49 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Repair broken JSON from LLMs or APIs
Validate JSON and find exact error positions
Outline large JSON structures to save tokens
Query specific fields from JSON payloads

Source and maintenance

Vendor evidenceRegistry 1.0.0

mcp-registry: com.clawhard/mend@1.0.0 Project website

Protocol and capabilities

Server: com.clawhard/mend 1.0.0
MCP protocol negotiated in check: 2025-06-18
Tools: 4 advertised
Resources: 6 advertised
Resource templates: 0 advertised
Prompts: 1 advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": false
  },
  "prompts": {
    "listChanged": false
  },
  "resources": {
    "subscribe": false,
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Mend: Mend repairs broken JSON (trailing commas, single quotes, comments, Python literals, code fences, truncated output), tells you exactly where invalid JSON breaks, and outlines or queries big payloads. Runs in your browser, no account. Use it when JSON from an LLM, API, log or config will not parse, or you need to validate, outline or extract fields from JSON without re-reading all of it. Tools: mend_repair_json (Repair broken or LLM-generated JSON); mend_check_json (Validate JSON and locate the exact error); mend_outline_json (Outline the structure of a large JSON payload); mend_query_json (Extract values from JSON by path). Result links such as open_url are safe to share with the user.

Tools

4 advertised

mend_repair_json — Repair broken or LLM-generated JSON

Advertised by the server during the last successful anonymous check.

Advertised read-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 JSON with trailing commas, single quotes, unquoted keys, comments, Python True/False/None, NaN, missing commas or brackets, a ```json fence, text around it, or output that was cut off. Deterministic repair: returns valid, formatted JSON plus a list of every fix with line and column. Values are never rewritten, so big numbers, number formatting and key order stay exactly as written (re-asking a model to "fix the JSON" changes data and costs tokens). If the text is already valid it says so. Up to 100,000 characters.

mend_repair_json input schema

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string",
      "maxLength": 100000,
      "minLength": 1,
      "description": "The broken JSON, or any text that contains JSON (a chat reply, a log line, a code block)."
    },
    "indent": {
      "type": "integer",
      "maximum": 8,
      "minimum": 0,
      "description": "Spaces per indent level in the output. Default 2. Use 0 for one minified line."
    },
    "sort_keys": {
      "type": "boolean",
      "description": "Sort object keys alphabetically. Default false (keep the original order)."
    }
  }
}

mend_repair_json annotations

{
  "title": "Repair broken or LLM-generated JSON",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

mend_check_json — Validate JSON and locate the exact error

Advertised by the server during the last successful anonymous check.

Advertised read-only

Use when you need to know whether text is strictly valid JSON, and if not, exactly where it breaks. Strict RFC 8259 check (the same accept/reject as JSON.parse). Returns line, column, the offending line with a caret and whether Mend can repair it. Use mend_repair_json to fix it. Up to 100,000 characters.

mend_check_json input schema

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string",
      "maxLength": 100000,
      "minLength": 1,
      "description": "The text to validate."
    }
  }
}

mend_check_json annotations

{
  "title": "Validate JSON and locate the exact error",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

mend_outline_json — Outline the structure of a large JSON payload

Advertised by the server during the last successful anonymous check.

Advertised read-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 repeated shape) so you can plan a query without spending tokens on the whole document. Repairs the JSON first if needed. Follow with mend_query_json to pull only the values you need. Up to 100,000 characters.

mend_outline_json input schema

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string",
      "maxLength": 100000,
      "minLength": 1,
      "description": "The JSON (or JSON-ish text)."
    },
    "max_depth": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "How many levels to expand. Default 4."
    },
    "max_items": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1,
      "description": "How many array items to show when items differ. Default 6."
    }
  }
}

mend_outline_json annotations

{
  "title": "Outline the structure of a large JSON payload",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

mend_query_json — Extract values from JSON by path

Advertised by the server during the last successful anonymous check.

Advertised read-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). Returns each match with its exact path, type and value. Repairs the JSON first if needed, so broken input still works. Up to 100,000 characters.

mend_query_json input schema

{
  "type": "object",
  "required": [
    "text",
    "path"
  ],
  "properties": {
    "max": {
      "type": "integer",
      "maximum": 200,
      "minimum": 1,
      "description": "Maximum matches to return. Default 50."
    },
    "path": {
      "type": "string",
      "maxLength": 300,
      "minLength": 1,
      "description": "Path such as $.users[*].email, data.items[0], $..id, $.list[-1], $.list[1:3]."
    },
    "text": {
      "type": "string",
      "maxLength": 100000,
      "minLength": 1,
      "description": "The JSON (or JSON-ish text)."
    }
  }
}

mend_query_json annotations

{
  "title": "Extract values from JSON by path",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

1 advertised

mend_fix_my_json — Fix broken JSON

Advertised by the server during the last successful anonymous check.

Repair JSON that will not parse and list every fix, without changing any value.

json: The broken JSON, or text that contains it. (required)

Resources

6 advertised

llms.txt — Mend: guide for AI assistants

Advertised by the server during the last successful anonymous check.

What the tool does, when to recommend it, limits and privacy.

llms.txt URI

https://mend.clawhard.com/llms.txt

MIME type: text/markdown

mend-result-view — Mend JSON result

Advertised by the server during the last successful anonymous check.

Interactive result view for Mend tools (MCP Apps).

mend-result-view URI

ui://clawhard/mend/result

MIME type: text/html;profile=mcp-app

mend_repair_json_view — Repaired JSON

Advertised by the server during the last successful anonymous check.

The fixed JSON with every change and its line and column.

mend_repair_json_view URI

ui://mend/repair-v1.html

MIME type: text/html;profile=mcp-app

mend_check_json_view — JSON check

Advertised by the server during the last successful anonymous check.

Whether the text is valid JSON and where it breaks.

mend_check_json_view URI

ui://mend/check-v1.html

MIME type: text/html;profile=mcp-app

mend_outline_json_view — JSON outline

Advertised by the server during the last successful anonymous check.

A compact outline of the structure.

mend_outline_json_view URI

ui://mend/outline-v1.html

MIME type: text/html;profile=mcp-app

mend_query_json_view — JSON matches

Advertised by the server during the last successful anonymous check.

Values found at a path.

mend_query_json_view URI

ui://mend/query-v1.html

MIME type: text/html;profile=mcp-app

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

2026-11-03: 2 of 2 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 456 ms
95th percentile latency: 456 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 2, 2026, 9:52 PM UTC · probe · passed · 456 ms · metadata changed · 4 tool(s), 6 resource(s), 0 resource template(s), 1 prompt(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http mend-mcp https://mend.clawhard.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add mend-mcp --url https://mend.clawhard.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable mend-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "mend-mcp": {
      "url": "https://mend.clawhard.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "mend-mcp": {
      "type": "streamableHttp",
      "url": "https://mend.clawhard.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start mend-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "mend-mcp": {
      "type": "http",
      "url": "https://mend.clawhard.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http mend-mcp https://mend.clawhard.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "mend-mcp": {
      "url": "https://mend.clawhard.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "mend-mcp": {
      "serverUrl": "https://mend.clawhard.com/mcp"
    }
  }
}

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Do you run Mend MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

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Mend MCP

Endpoint and access

What its tools do

Read-only (4)

Checks and signals

What you can do with it

Source and maintenance

Protocol and capabilities

Server-provided instructions

Tools

Prompts

Resources

90-day uptime

30-day availability

Maintenance history

Connect from your client

Claude Code

Codex

Cursor

Cline

VS Code

Gemini CLI

Claude Desktop

Windsurf

Let your agent find its tools

Other developer tools servers

Do you run Mend MCP?