Tarnak x402 Toolkit — JSON Repair API

x402

Tarnak x402 Toolkit — JSON Repair API is a paid API for AI agents from api.capousd-student-tools.me, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Repairs malformed JSON text by auto-detecting and fixing syntax errors (trailing commas, missing quotes, etc.) and returns the corrected value along with a list of applied fixes.

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Keyless pay-per-call APIs for AI agents on Base: token risk verdict, rug/honeypot report, gas estimate, URL-to-markdown and more. x402 v2, USDC, no API key or signup. 10 free verdicts per IP per day.

Output

Returns a JSON object with: 'ok' boolean indicating success, 'error' string or null, 'value' containing the parsed and repaired JSON value, 'applied' array listing the names of repairs that were applied (e.g. 'removed_trailing_comma'), and 'repaired' boolean indicating whether any fixes were needed.

Example use cases

Fix LLM-generated malformed JSON

“The AI just returned this JSON but it has trailing commas and I can't parse it — can you repair it? {"items": ["a", "b",], "count": 2,}”

Recover corrupted config file JSON

“My config file JSON got corrupted and now has syntax errors. Can you fix this so it's valid again? {"host": "localhost" "port": 8080}”

Sanitize user-submitted JSON input

“A user submitted this JSON form data but it's malformed with extra commas and missing brackets — please repair it so I can process it: {"email": "foo@bar.com", "tags": ["admin",]}”

Technical details

Endpoint

POSThttps://api.capousd-student-tools.me/v1/repair?utm_source=zero.xyz

When to prefer

Use this endpoint when you have a JSON string that fails to parse due to common syntax issues like trailing commas, unquoted keys, or minor formatting errors, especially from LLM outputs or user-submitted data. It is keyless and pay-per-call via x402/USDC, making it ideal for AI agents that need lightweight, no-signup JSON cleanup without maintaining API credentials.

Side effects

JSON is too malformed to recover — returns ok:false with an error message
Input is not JSON at all (e.g. plain text or binary) — returns error
Empty input or missing 'json' field — returns validation error
Payment failure via x402 — 402 response if USDC payment not provided correctly

Input

Schema · Request body

Field	Type	Description
json	string	Malformed JSON text.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "error": null,
    "value": {
      "a": 1
    },
    "applied": [
      "removed_trailing_comma"
    ],
    "repaired": true
  }
}

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