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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 hn-pulse.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs malformed, truncated, or markdown-wrapped JSON strings from LLM outputs so multi-agent pipelines can parse 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://hn-pulse.agentdiet.dev/v1/schema-repair)
Output
A repaired, valid JSON object parsed from the input malformed string, with common issues like trailing commas, markdown fences, single quotes, and truncation resolved deterministically.
Example use cases
Fix LLM output before downstream agent
“My language model just returned this JSON but it has single quotes and a trailing comma and it's breaking my pipeline — fix it for me: {"user": 'Bob', "score": 42,}”
Strip markdown fences from JSON response
“The AI wrapped its JSON in triple backtick markdown fences and now my parser is crashing — can you clean up this response so I just get plain valid JSON? Here it is: ```json
{"result": "success"}
```”
Recover truncated streaming JSON
“My streaming LLM response got cut off halfway and the JSON is incomplete — it ends with just `{"items": [{"id": 1, "name": "foo"` — can you repair and close it into valid JSON?”
Technical details
Endpoint
GEThttps://hn-pulse.agentdiet.dev/v1/schema-repair?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair rather than LLM-based guessing — ideal for multi-agent pipelines where predictability and speed matter. Prefer it over re-prompting the LLM when the malformation pattern is structural (trailing commas, markdown fences, single quotes, truncation) rather than semantic.
Side effects
- Input string is so corrupted that deterministic repair is impossible — returns error or partial result
- JSON structure is ambiguous after truncation — repair may not match original intent
- Very long JSON strings may hit query parameter length limits since raw_json is passed via GET query
- Non-JSON input (e.g. plain text or XML) may produce unexpected repair attempts
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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