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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 serp-extract.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs truncated or malformed JSON strings (trailing commas, markdown fences, single quotes) produced by LLMs so multi-agent pipelines can process them 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://serp-extract.agentdiet.dev/v1/schema-repair)
Output
A repaired, valid JSON object derived from the malformed input string, with all common LLM-introduced errors corrected including trailing commas removed, markdown code fences stripped, single quotes converted to double quotes, and truncated structures closed.
Example use cases
Fixing LLM output in agent pipeline
“The AI just returned this malformed JSON with a trailing comma and markdown fences and my downstream agent is crashing — can you repair it so I get clean valid JSON? Here it is: ```{"results": ["foo", "bar",]}```”
Sanitizing single-quoted JSON before storage
“I've got a JSON blob from a language model that uses single quotes instead of double quotes and I need it fixed before I write it to the database — please repair this string: {'user': 'bob', 'score': 42}”
Recovering truncated JSON from streamed response
“The streaming API cut off mid-response and I ended up with a truncated JSON object that's missing its closing braces — can you repair this broken string and return a valid JSON object? Here's what I got: {"status": "ok", "data": [{"id": 1, "value": "test"”
Technical details
Endpoint
GEThttps://serp-extract.agentdiet.dev/v1/schema-repair?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic (non-AI) repair of LLM-generated JSON in a multi-agent or automation pipeline, especially when you cannot afford non-deterministic behavior or extra latency from a second LLM call. Prefer it over regex hacks or custom parsers when dealing with common LLM failure modes like trailing commas, markdown fences, and single quotes at scale.
Side effects
- Input JSON is so severely malformed that deterministic repair is impossible — returns error or partial result
- Input string is not JSON at all (plain text, HTML, binary) — may return an error response
- Ambiguous truncation points where multiple valid completions exist — repair may be semantically incorrect
- Very long JSON strings may time out or exceed query parameter length limits via GET method
- Nested or deeply escaped JSON strings may confuse the parser
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Reviews
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