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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) so multi-agent pipelines never crash
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/paid)
Output
A repaired, syntactically valid JSON object with all malformations fixed — trailing commas removed, markdown fences stripped, single quotes normalized to double quotes, truncated structures closed, and missing delimiters added — ready for downstream parsing.
Example use cases
Fix LLM JSON before database insert
“The structured extraction step returned this JSON but it has a trailing comma and single quotes — clean it up so I can insert it into the database: {'user': 'bob', 'score': 42,}”
Repair truncated agent response payload
“My agent pipeline got a truncated JSON back from the model — it looks like it got cut off mid-object. Can you repair this and return a valid JSON object: {"items": [{"id": 1, "name": "widget"”
Strip markdown fences from code-block JSON
“The LLM wrapped its JSON output in a markdown code block and now my parser is crashing. Strip the fences and fix any syntax issues so I get clean parseable JSON: ```json
{"status": "ok", "results": [1, 2, 3],}
```”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/paid?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that frequently contains syntax errors like trailing commas, markdown code fences, single quotes, or truncation. It is particularly valuable in production A2A pipelines where a downstream JSON parse failure would crash the workflow. Prefer it over generic JSON parsers when you need deterministic repair logic specifically tuned for LLM output artifacts.
Side effects
- Input is so severely malformed that deterministic repair is impossible — returns error or best-effort partial result
- Input is not JSON at all (plain text, binary) — repair may fail or return unexpected structure
- Extremely long truncated JSON may have ambiguous intended structure — repair result may not match original intent
- Payment failure via x402 — endpoint returns 402 before processing
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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