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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 onchain-risk.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) into valid, parseable JSON deterministically.
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://onchain-risk.agentdiet.dev/v1/malformed-json-healer)
Output
A JSON object containing the deterministically repaired, valid JSON — free of trailing commas, markdown fences, single-quote issues, and truncation artifacts, ready to parse without errors.
Example use cases
Fix crashed LLM pipeline JSON
“Our language model returned this malformed JSON with trailing commas and it's breaking our downstream parser — can you clean it up and give me valid JSON? The raw output is: {"status": "ok", "results": [1, 2, 3,],}”
Strip markdown fences from agent response
“My AI agent wrapped its JSON output in triple backtick markdown fences and now I can't parse it programmatically — can you repair this into plain valid JSON: ```json
{"user": "bob", "score": 42}
```”
Repair single-quoted JSON from scraper
“I got this JSON-like string back from a scraper but it uses single quotes instead of double quotes and has a missing closing bracket — can you fix it into proper JSON? Here it is: {'name': 'widget', 'price': 9.99”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/malformed-json-healer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair for LLM outputs in automated pipelines — especially when the malformation patterns are known (trailing commas, markdown fences, single quotes, truncation). Prefer it over LLM-based re-generation when you need reproducible, fast, low-cost fixes without hallucination risk.
Side effects
- Input JSON is so severely malformed that repair is ambiguous or impossible — returns error
- Raw input string is empty or whitespace — returns validation error
- JSON structure is too deeply truncated to infer correct closing — may return partial or error
- Network/payment failure results in HTTP 402 or 5xx response
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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