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SignalHarness Search Result Filter
x402
SignalHarness Search Result Filter is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Filters and validates a JSON search result payload, returning a schema-validated analysis with warnings about caller-supplied data integrity.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a succeeded status with an analysis_json field containing schema-valid analysis of the submitted data, a warnings array highlighting any data integrity concerns (e.g. reminders to verify caller-supplied data), a service receipt with payment details (network, amount, asset), a SHA-256 hash of the result, and execution metadata including request/execution IDs and latency.
Example use cases
Validate search API response before processing
“I just got this JSON back from a search API and I want to make sure it's schema-valid and flag any issues before I feed it into my pipeline — can you run it through the SignalHarness search result filter? Here's the raw response: {"hits":[{"id":"1","relevance":0.85,"snippet":"Best practices for agent design"}]}”
Filter agent-retrieved search data
“My agent fetched some search results and I need to validate and filter the output before storing it — please send this JSON through the SignalHarness search result filter and tell me if there are any warnings: {"items":[{"url":"https://example.com","title":"Agent frameworks","score":0.77}]}”
Integrity check on third-party search payload
“Before I trust this third-party search result payload, can you pass it through the SignalHarness filter to get an integrity analysis and any red flags? The JSON is: {"results":[{"source":"partner-api","content":"Some result text","rank":1}]}”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/search_result_filter/invokeWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call validation and filtering pass on a JSON search result payload before using it in an agent pipeline. It is best suited for agents operating in the x402 micropayment ecosystem on Base that need a fast, auditable integrity check with cryptographic receipts, rather than a full-featured search indexing or ranking service.
Side effects
- Invalid or malformed JSON string in request_json field causes rejection
- Payload exceeds 65536 character limit returns an error
- Empty or too-short input (minLength 2) is rejected
- Payment failure on the x402 protocol causes the call not to execute
- Network issues on Base chain may delay receipt settlement
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Verify the caller-supplied data before relying on this result."
],
"service_id": "search_result_filter",
"analysis_json": "{\"example\":\"schema-valid caller-supplied data\"}",
"evidence_scope": "caller_supplied_data"
},
"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": "search_result_filter",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "d6867aba3ff5959d2d27f8838354255eb0548f9392a5f959eaaab0f66be218d5",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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