MCP server

jsonaut

By shoggi211

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

Listed on

First seen 2 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.

Directories

3 via MCP Toplist

Tools

From an anonymous probe

ToolBench grade

Not graded by Arcade

GitHub stars

From MCP Toplist

Tools

Tool	Description	Behaviour
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 success). Pass a JSON Schema to shape the output.	Not declared
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.	Not declared
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; charged only on success).	Not declared
validate_json	Validate a JSON string against a JSON Schema. Free. Returns validity and a list of violations.	Not declared

Directory listings
Directory	Listing	Tier	First seen
Official MCP Registry	io.github.shoggi211/jsonaut	-	2 Oct 2026
Glama	Listed there according to MCP Toplist’s dataset; not collected by InvokeRank.
mcp.so	Listed there according to MCP Toplist’s dataset; not collected by InvokeRank.
PulseMCP	Listed there according to MCP Toplist’s dataset; not collected by InvokeRank.

Other listings grouped here
Listings with the same name that we group under this server, and why. Account names differ across directories, so a grouped listing is often the same publisher.
Listing	Publisher	Why it is grouped here
jsonaut	progamerplayzyt97	Near-identical description