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Deterministic JSON Repair & Schema Validator
Deterministic 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, fenced code blocks) so they become valid, parseable 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://polymarket-odds.agentdiet.dev/v1/structured-output)
Output
Returns a repaired, valid JSON object where all syntax errors — trailing commas, markdown fences, single quotes, truncation — have been deterministically corrected, ready to be parsed or passed to the next stage of an agent pipeline.
Example use cases
Fixing LLM output in agent pipeline
“My AI model just returned a JSON response that has trailing commas and is wrapped in markdown fences. Can you clean it up and give me valid JSON? Here's what it returned: ```json {'name': 'Bob', 'score': 42,} ```”
Recovering truncated JSON from long generation
“This JSON got cut off mid-generation and now it's invalid — can you repair and close it so it parses correctly? The broken string is: {"results": [{"id": 1, "value": "foo"}, {"id": 2”
Sanitizing single-quote JSON before database insert
“I have a JSON blob from an older LLM that used single quotes instead of double quotes throughout. Fix it to proper JSON so I can parse and store it: {'user': 'carol', 'active': true, 'score': 98}”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/structured-output?utm_source=zero.xyzWhen to prefer
Use this endpoint when an LLM or agent in your pipeline produces structurally invalid JSON that would crash a downstream parser — especially when the issues are predictable syntax errors like trailing commas, markdown wrapping, or single quotes. Prefer this over re-prompting the LLM when speed and determinism matter more than semantic correction. Ideal for multi-agent workflows where you cannot afford pipeline failures due to malformed JSON.
Side effects
- Input is so severely malformed that deterministic repair is impossible — may return an error or best-effort partial result
- Input string is not JSON-like at all (e.g. plain text prose) — repair may fail or produce nonsensical output
- Extremely long truncated JSON may not be recoverable without missing context
- Rate limiting or payment failure via x402 if USDC balance is insufficient
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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