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Deterministic LLM JSON Repair & Schema Validator
Deterministic LLM 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 malformed, truncated, or markdown-wrapped LLM JSON outputs (trailing commas, single quotes, markdown fences) to prevent multi-agent pipeline crashes
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/llm-json-schema-healer)
Output
A repaired, valid JSON object with all syntax errors corrected — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed — ready for immediate use in downstream pipeline steps.
Example use cases
Fix LLM output before database write
“The agent upstream gave me this JSON but it has single quotes instead of double quotes and a trailing comma — heal it so I can safely write it to the database: {'user': 'bob', 'status': 'active',}”
Repair truncated JSON mid-pipeline
“My pipeline step got this truncated JSON from the model and now the next step is crashing — can you repair it and return a valid object? Here's the broken output: {"items": [{"id": 1, "name": "Widget"”
Strip markdown fences from agent response
“The LLM wrapped its JSON output in triple-backtick markdown fences and now my parser throws an error — please clean it up and give me back raw valid JSON: ```json
{"status": "ok", "count": 5}
```”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/llm-json-schema-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives LLM-generated JSON that is syntactically broken (trailing commas, markdown fences, single quotes, truncation) and you need a deterministic, rule-based fix rather than asking another LLM to rewrite it. Ideal for production pipelines where reliability and repeatability matter more than creative reinterpretation of ambiguous structure.
Side effects
- Input JSON is so severely malformed that deterministic repair is impossible — returns an error indicating the string is unrecoverable
- Empty or missing raw_json parameter causes a validation error
- Input is not JSON at all (e.g. plain prose) and cannot be coerced into a valid object
- Extremely long or deeply nested JSON may exceed processing limits
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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