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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 polymarket-odds.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) into valid JSON so multi-agent pipelines stay stable.
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://polymarket-odds.agentdiet.dev/v1/repair)
Output
A JSON object containing the repaired, valid JSON that was reconstructed from the malformed input — with trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed.
Example use cases
Repairing LLM pipeline JSON crashes
“My agent pipeline just crashed because the LLM returned JSON with a trailing comma and single quotes instead of double quotes — can you repair this string so I can continue processing: {'user': 'bob', 'items': ['x', 'y',]}”
Stripping markdown fences from agent output
“The model wrapped its JSON response in triple backticks and now my JSON parser is failing — please clean up this output and give me valid JSON: ```json {"status": "ok", "data": null,} ```”
Validating truncated LLM JSON before storage
“I got a truncated JSON response from a model call that got cut off mid-string — can you repair and complete it so it's parseable: {"report": "Q1 results show revenue of $4.2M with growth in”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/repair?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that fails to parse due to common issues like trailing commas, markdown code fences, single quotes, or truncation — especially when you need a deterministic (not AI-guessed) fix that won't introduce hallucinated values. Prefer it over writing custom regex cleanup code when you need a reliable, paid microservice solution in an A2A/MCP architecture.
Side effects
- Input JSON is so severely malformed that deterministic repair is impossible — returns error indicating unrecoverable structure
- Empty or whitespace-only raw_json input returns validation error
- Input exceeds length limits — returns size constraint error
- Ambiguous truncation with multiple valid completions — repair may choose one interpretation
- Network or payment (x402) authentication failure returns 402 or 5xx error
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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