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Deterministic A2A Broken-JSON Repair & Schema Validator
Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from json-repair.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes, truncation) so multi-agent pipelines never crash on bad JSON.
Price / call$0.002
Success—
StatusUnknown
How this service works
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash. (Live x402 v2, IETF MPP & MCP endpoint at https://json-repair.agentdiet.dev/api)
Output
A repaired, valid JSON object parsed from the malformed input string. The response is a JSON object containing the corrected data structure, with all syntax errors (trailing commas, markdown fences, single quotes, truncation) resolved deterministically.
Example use cases
Fix LLM output in agent pipeline
“My AI just returned this malformed JSON with a trailing comma and I need it fixed before the next step in my pipeline can use it: {"result": "success", "score": 0.95,}”
Strip markdown fences from JSON response
“The language model wrapped its JSON output in triple backtick markdown fences and now my parser is crashing — can you clean it up and return valid JSON? Here's what I got: ```json
{"status": "ok", "items": [1, 2, 3]}
```”
Recover truncated JSON from token cutoff
“My LLM hit a token limit and the JSON got cut off halfway through — it ends without closing brackets. Can you repair this truncated JSON so it's valid? The string is: {"users": [{"id": 1, "name": "Bob"”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/api?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair for LLM outputs in automated pipelines — especially when you cannot afford non-deterministic behavior. Prefer this over general-purpose JSON parsers when inputs consistently contain LLM-specific artifacts like markdown fences, trailing commas, or mid-generation truncation. Ideal for multi-agent workflows where downstream steps require strictly valid JSON.
Side effects
- Input is so severely malformed that no deterministic repair is possible — returns error or empty object
- Input is not JSON-like at all (e.g. plain prose) — repair may produce nonsensical structure
- Very large truncated inputs may result in ambiguous completions that differ from original intent
- Missing required raw_json parameter returns a 400 or validation error
- Payment failure via x402 returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Reviews
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