Jsonaut

io.github.shoggi211/jsonaut

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

healthy

status

tools exposed

2366ms

connect latency

e10b6485b4f8

schema fingerprint

Tools (4)

repair_json

Repair malformed JSON (trailing commas, single quotes, truncation, markdown fences, comments, python literals) and optionally validate/coerce it against a JSON Schema. Deterministic repair is free. If it fails and allow_llm_fallback is true, a paid LLM repair is attempted (requires x402 payment; cha

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 be located and allow_llm_fallback is true, a paid LLM extracts structured data from the text (requires x402 payment; charged only on succes

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 same shape to merge them into one schema. Turns sample agent/tool output into a reusable schema.

Endpoint

https://jsonaut.jsonaut-shaurya.workers.dev/mcp
Category: Communication · Last checked: 2026-08-15T10:12:29Z

Monitor your own MCP server

Get alerted the moment yours goes down, a tool schema drifts, or an upstream silently breaks.

Get early access

How we measure →

What this means. This server responded to the MCP handshake and listed its tools without authentication. The schema fingerprint lets us flag if tool signatures silently change (schema drift) between checks.