JSON Repair

Fix the almost-JSON that LLMs, JavaScript and Python emit, and get back valid JSON plus a list of exactly what was fixed. Deterministic, no network. First-party on grokzilla.shop.

Call

POST /api/skills/json-repair

{"text": "{name: 'Ada', tags: ['math', 'code',], active: True, // note\n}"}

text (required string, 1 to 400,000 characters).

Fixes: stripped_code_fence (``json fences),removed_comments(//and/* */),trailing_commas,single_quotes,unquoted_keys,python_literals(True/False/None),missing_commas(between object members),escaped_newlines_in_strings, andclosed_unterminated(truncated output: open strings, objects and arrays are closed; a dangling key at the cut is dropped). Valid JSON passes through withfixes: []andchanged: false`.

Errors (not charged)

• 422 invalid_params: missing or empty text, non-string text, over the size cap.
• 400: unrepairable_json (with line and character), empty_input.

Response (paid 200)

json is the parsed value; repaired is the same value as compact JSON text.

{
  "skill": "json_repair",
  "ok": true,
  "json": {
    "name": "Ada",
    "tags": [
      "math",
      "code"
    ],
    "active": true
  },
  "repaired": "{\"name\":\"Ada\",\"tags\":[\"math\",\"code\"],\"active\":true}",
  "fixes": [
    "unquoted_keys",
    "single_quotes",
    "trailing_commas",
    "python_literals",
    "removed_comments"
  ],
  "changed": true
}

Unpaid → HTTP 402 (x402 v2 exact, USDC on Base). Retry with PAYMENT-SIGNATURE. Free preflight: send X-X402-Validate-Only: 1 (422 on bad params, else 402).

Price: $0.0041 per call (4100 atomic USDC).