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SignalHarness JSON Repair & Normalize
x402
SignalHarness JSON Repair & Normalize is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Repairs malformed JSON text, normalizes its structure, and reports duplicate keys and applied fixes
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing: the repaired and normalized JSON value, a list of repairs applied, the normalized JSON as a string, and any duplicate keys detected. Also includes a receipt with payment confirmation, latency, and execution metadata.
Example use cases
Fix LLM-generated malformed JSON
“The model returned this JSON but it has syntax errors and won't parse — can you repair it and give me back a clean, valid object? Here's the broken output: {"status": "ok", "items": [1, 2, 3,], "meta": {"count": 3}”
Detect duplicate keys in API response
“I got this JSON back from a third-party API and I suspect it has duplicate keys that are causing issues downstream — can you normalize it and tell me exactly which keys are duplicated? Here's the payload: {"id": 42, "id": 99, "value": "test"}”
Clean up user-submitted JSON config
“A user pasted this config JSON into our form but it's malformed — missing some closing brackets and has trailing commas. Can you repair and normalize it so I can safely store it? Here's what they submitted: {"timeout": 30, "retries": 3, "host": "localhost",}”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/json_repair_normalize/invokeWhen to prefer
Choose this endpoint when you have a JSON string that fails to parse and you need it repaired automatically without writing custom fix logic. It is especially useful for cleaning up LLM-generated JSON, recovering data from corrupted API responses, or normalizing inconsistently formatted JSON before storage or further processing. Prefer it over a generic JSON validator when you need actual repair and normalization, not just error detection.
Side effects
- Input text is empty or exceeds 65536 characters — validation error
- Input is so severely malformed that no valid JSON can be recovered — result may be empty or partial
- Payment not received or insufficient USDC balance — 402 response before execution
- Network or service timeout — no result returned
- Text is valid JSON already — repairs list will be empty but result is still returned normally
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"value": {},
"repairs": [
"example"
],
"normalized": "example",
"duplicateKeys": [
"example"
]
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "json_repair_normalize",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "e48ba9ab26657e6400a15821bea7d81c48a83c84ad80cca5b9efd7ff621753e0",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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