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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) 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/structured-output)
Output
A repaired, valid JSON object parsed from the malformed input string, with all syntax errors corrected — trailing commas removed, markdown fences stripped, single quotes converted to double quotes, and truncated structures closed.
Example use cases
Fix LLM output in agent pipeline
“My agent just got this malformed JSON back from GPT-4 and the pipeline crashed — it has trailing commas and is wrapped in markdown backticks. Can you repair it into valid JSON? Here it is: ```{"status": "ok", "items": [1, 2, 3,],}```”
Repair single-quoted JSON from chatbot
“I got this response from a chatbot that used single quotes instead of double quotes and now my JSON parser is failing. Can you fix it into proper valid JSON? The string is: {"user": 'john', 'active': true}”
Recover truncated structured output
“My LLM response got cut off mid-generation and I ended up with a truncated JSON object that's missing its closing braces. Can you deterministically repair this fragment so I can continue processing? Here's what I have: {"report": {"section": "summary", "data": [1, 2”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/structured-output?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an LLM or agent pipeline produces malformed JSON that needs deterministic, rule-based repair rather than AI-based reinterpretation. Ideal when you need predictable, repeatable fixes for known JSON syntax errors like trailing commas, markdown code fences, and single-quoted keys — without the cost or latency of sending the data back to an LLM for re-generation.
Side effects
- Input JSON is too severely malformed or truncated to deterministically repair — returns error
- Empty or null raw_json input — returns validation error
- JSON is structurally ambiguous after truncation — repair may not match original intent
- Payment required (HTTP 402) if x402 payment header is missing or insufficient
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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