JsonMend

{
  "mcpServers": {
    "dev.workers.mike-tusa.jsonmend/jsonmend": {
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

2 shown · authentication unknown

• Repair broken JSON (LLM output) and list the fixes

  repair_json

  Turn broken or messy JSON text into valid JSON. Strips Markdown code fences and prose before/after the JSON, removes comments and trailing commas, converts single/curly quotes, quotes unquoted keys, maps Python None/True/False, inserts missing commas, closes truncated strings/arrays/objects, and wraps NDJSON / several concatenated objects into one array. Returns the parsed value (json), the repaired text, and the list of fixes applied; valid input passes through unchanged with no fixes. Optional schema (+ coerce) also validates the result. Fails with isError (code unrepairable / no_json_found) when nothing JSON-like can be recovered. Pure computation: read-only, no network access, inputs not stored. Same engine and limits as POST /api/v1/repair.

  Schema valid · SHA-256 e0682e5ba33b…

  View input schema

  {
    "type": "object",
    "properties": {
      "input": {
        "type": "string",
        "minLength": 1,
        "maxLength": 102400,
        "description": "The raw (possibly broken) JSON text, e.g. an LLM reply with code fences and prose around the JSON. Max 102,400 bytes (UTF-8)."
      },
      "format": {
        "type": "string",
        "enum": [
          "compact",
          "pretty",
          "preserve"
        ],
        "default": "compact",
        "description": "Layout of the returned text: compact (default), pretty (2-space indent), or preserve (jsonrepair's output, keeps original spacing and long-number digits)."
      },
      "schema": {
        "type": "object",
        "description": "A JSON Schema (draft 2020-12 by default; 2019-09, 7 and 4 also supported). Only local $refs (#/...) resolve; remote $refs are an error. Max 32 KB."
      },
      "coerce": {
        "type": "boolean",
        "default": false,
        "description": "Convert values toward the schema's declared types before validating: \"42\" → 42, \"true\" → true, \"null\" → null, 5 → \"5\", x → [x]. Each change is listed in coercions."
      },
      "draft": {
        "type": "string",
        "enum": [
          "2020-12",
          "2019-09",
          "7",
          "4"
        ],
        "description": "JSON Schema draft. Default: from the schema's $schema, else 2020-12."
      }
    },
    "required": [
      "input"
    ],
    "additionalProperties": false
  }