io.github.shoggi211/jsonaut

up checked 2026-11-10T23:38:03.572Z

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Publisher-provided description

Repair malformed JSON from LLM/agent output; optional JSON Schema coercion. Free + x402 paid.

Summary by lookupd

Repairs malformed JSON, extracts JSON from text, infers and validates JSON Schemas, with optional schema-based coercion.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http jsonaut https://jsonaut.jsonaut-shaurya.workers.dev/mcp

Codex, remote (streamable-http)

codex mcp add jsonaut --url https://jsonaut.jsonaut-shaurya.workers.dev/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "jsonaut": {
      "url": "https://jsonaut.jsonaut-shaurya.workers.dev/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

repair_json Repair malformed JSON (trailing commas, single quotes, truncation, markdown fences, comments, python literals) and optionally validate/coerce it against a JSON
validate_json Validate a JSON string against a JSON Schema. Free. Returns validity and a list of violations.
extract_json Extract JSON embedded in arbitrary text — LLM prose, chat messages, logs, emails — then repair and validate it. Deterministic extraction is free. If no JSON can
infer_schema Infer a JSON Schema (draft 2020-12) from an example JSON value. Free and deterministic. Set as_samples=true when the input is an array of example objects of the

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