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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 2026-10-23).
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash
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 repaired, syntactically valid JSON object with all common LLM output corruption fixed — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures completed where possible.
Example use cases
Fix LLM output before database write
“The agent just returned this JSON but it has single quotes and a trailing comma and my pipeline is crashing — please repair it into valid JSON so I can store it: {'user': 'bob', 'score': 42,}”
Strip markdown fences from agent response
“My LLM wrapped its JSON output in triple-backtick markdown code fences again and now the parser is failing. Can you clean this up and return just the raw valid JSON object?”
Recover truncated JSON mid-pipeline
“This JSON got cut off mid-string by the token limit and now nothing downstream can parse it. Try to deterministically repair it and give me back whatever valid JSON you can reconstruct: {"items": [{"id": 1, "name": "widget",”
Technical details
Endpoint
POSThttps://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 rather than probabilistic LLM re-generation — ideal for multi-agent pipelines where consistency and reproducibility matter. Best for fixing known LLM output artifacts like trailing commas, markdown fences, and single-quoted keys. Prefer over asking a second LLM to reformat JSON when you want guaranteed structural fixes without stochastic variation.
Side effects
- JSON too severely malformed to recover deterministically — returns error indicating irreparable input
- Empty or whitespace-only input rejected with validation error
- Input that is not JSON-like at all may fail schema repair with an error response
- Network or payment authorization failure returns HTTP 402 or 5xx
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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