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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 truncated or malformed LLM-generated JSON (trailing commas, markdown fences, single quotes) so multi-agent pipelines can continue 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/json-validator)
Output
A JSON object containing the repaired, syntactically valid JSON string derived from the malformed input, suitable for direct parsing by downstream agents or systems.
Example use cases
Fix LLM response before downstream processing
“The LLM just returned this JSON with trailing commas and it's breaking my pipeline — can you repair it so I can parse it? Here's the raw string: {"status": "ok", "items": [1, 2, 3,]}”
Strip markdown fences from agent output
“My AI agent wrapped its JSON response in triple backtick markdown fences and now my parser crashes. Please clean it up: ```json {"result": "success", "count": 5} ```”
Recover truncated JSON from a cut-off response
“The model got cut off mid-response and I ended up with incomplete JSON — something like {"user": "Bob", "score": 99, "tags": ["a", "b" — can you try to repair it so it's valid?”
Technical details
Endpoint
GEThttps://hn-pulse.agentdiet.dev/v1/json-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your multi-agent pipeline receives raw LLM JSON outputs that are syntactically invalid due to common issues like trailing commas, markdown fences, or single-quoted keys, and you need a deterministic (non-generative) repair rather than asking the LLM to re-generate the JSON. Particularly valuable in high-throughput pipelines where re-prompting is too slow or costly.
Side effects
- Input is so severely truncated it cannot be deterministically completed — returns an error or best-effort partial result
- Input is not JSON at all (e.g., plain text or binary) — may return validation failure
- Ambiguous repair cases (e.g., conflicting quote styles) may produce unexpected output
- Payment failure via x402 returns HTTP 402 before processing occurs
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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