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SignalHarness Text Deduplication
x402
SignalHarness Text Deduplication 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).
Identifies and groups exact and normalized duplicate strings within a list or document, returning canonical representatives and deduplication metadata.
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object with the total item count, a retained-order array of deduplicated items, grouped exact duplicates, normalized duplicate groups, and canonical representative strings for each group, along with a payment receipt and execution metadata.
Example use cases
Clean up email subscriber list
“I have a list of 200 email addresses from different sources and I need to remove duplicates — can you deduplicate them case-insensitively and show me which ones were duplicates of each other?”
Deduplicate scraped article headlines
“I scraped 100 news headlines and suspect many are near-identical reposts — deduplicate this list and group the exact duplicates so I can see which headlines appeared more than once.”
Normalize tag taxonomy for content library
“Here are the tags from our content library as a list of strings — deduplicate them with case-insensitive matching and return the canonical representative for each duplicate group so I can standardize the taxonomy.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/text_deduplicate/invokeWhen to prefer
Choose this endpoint when you need to programmatically deduplicate string arrays or text documents with explicit grouping of duplicates and canonical representatives, especially when you require both exact and normalized (case-insensitive) duplicate detection. Prefer it over simple set-based deduplication when you need to understand which items were duplicates of each other, not just the final deduplicated list.
Side effects
- Array exceeds 256 items — request rejected with validation error
- Individual string exceeds 65536 characters — item rejected
- Empty array provided — minItems constraint violated
- Document field empty or missing when required — validation error
- Payment not included or insufficient — 402 response before execution
- Malformed JSON body — 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | |
| document | string | |
| caseSensitive | boolean |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"itemCount": 1,
"retainedOrder": [
0
],
"exactDuplicateGroups": [
"example"
],
"canonicalRepresentatives": [
{
"text": "Example caller-supplied content.",
"ordinal": 0,
"exactHash": "0000000000000000000000000000000000000000000000000000000000000000",
"normalizedHash": "0000000000000000000000000000000000000000000000000000000000000000"
}
],
"normalizedDuplicateGroups": [
"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": "text_deduplicate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "a4de56c0c6db65a7f92cfe363edd6deecdc15d4ff6e95cfff323ae8db68c24d5",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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