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LLM JSON Repair & Schema Validator
LLM JSON Repair & Schema Validator is a paid API for AI agents from shopify-intel.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Deterministically repairs malformed, truncated, or markdown-wrapped LLM JSON outputs (trailing commas, single quotes, markdown fences) so multi-agent pipelines can continue without crashing.
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://shopify-intel.agentdiet.dev/v1/llm-json-schema-healer)
Output
A repaired, valid JSON object that has had common LLM output defects corrected, including removal of markdown code fences, conversion of single quotes to double quotes, removal of trailing commas, and completion of truncated structures. The response is a JSON object ready for downstream parsing.
Example use cases
Fixing LLM output in agentic pipeline
“My agent just got this response from a language model but it has single quotes and a trailing comma and it's breaking the next step — can you repair it into valid JSON? Here's the raw output: {'user': 'Bob', 'active': true,}”
Stripping markdown fences from JSON
“The model wrapped its JSON response in triple-backtick markdown fences again and now my parser is failing — please strip the fences and fix any syntax errors so I get clean JSON back. Input: ```json
{"items": [1, 2, 3,]}
```”
Recovering truncated JSON from partial LLM output
“The LLM got cut off mid-response and I'm left with an incomplete JSON object that's missing closing brackets — can you deterministically repair and complete it so it's valid? Here it is: {"order": {"id": 99, "status": "pending"”
Technical details
Endpoint
GEThttps://shopify-intel.agentdiet.dev/v1/llm-json-schema-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when a multi-agent pipeline receives LLM-generated JSON that fails standard parsing due to common syntax issues like trailing commas, single quotes, or markdown fences, and you need a deterministic (not generative) fix rather than asking the LLM to retry. Ideal for high-throughput pipelines where reliability and cost matter at $0.002 per call.
Side effects
- Input JSON is so severely malformed that deterministic repair is impossible, returning an error
- Truncation is too severe to infer the intended structure
- Ambiguous single-quote vs apostrophe usage prevents reliable repair
- Rate limiting or payment failure returns HTTP 402
- Input string is empty or missing (minLength:1 not met)
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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