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SignalHarness Search Filter Validate
x402
SignalHarness Search Filter Validate is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Validates and analyzes caller-supplied JSON data against a search/filter schema, returning a structured analysis with warnings about data quality.
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a structured result containing an analysis_json field with the parsed assessment of the input data, a warnings array listing any data quality concerns, an evidence_scope field indicating the data source was caller-supplied, and a full receipt with payment confirmation, request/execution IDs, latency, and a SHA-256 hash of the result for integrity verification.
Example use cases
Pre-flight JSON validation for agent pipelines
“Before I submit this search request to the next service, validate this JSON for me and tell me if there are any warnings: {"search_term": "laptop", "category": "computers", "sort_by": "price_asc"}.”
Filter parameter integrity check
“I have some filter parameters I built dynamically and I want to make sure they're valid before using them — can you run this through validation: {"min_price": 100, "max_price": 50, "brand": "acme"}?”
Agent data quality audit
“My agent just assembled this JSON payload from user input and I want to catch any issues before it gets processed — please validate it and give me back any warnings: {"user_id": "abc123", "preferences": null, "filters": ["new", "sale"]}.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/search_filter_validate/invokeWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call JSON validation and analysis step within an agent pipeline — particularly when you want warnings about caller-supplied data quality before passing it downstream. Ideal for agentic workflows where data provenance matters and you want an immutable receipt (with SHA-256 result hash) proving what was validated. Less suitable for schema validation against a custom user-defined schema or for large-scale batch validation.
Side effects
- Invalid or malformed JSON string input returns an error without analysis
- Empty or too-short request_json (minLength: 2) triggers validation failure
- Payload exceeding 65536 characters is rejected
- Network or service timeout may result in failed status with no analysis
- Payment failure via x402 protocol prevents execution
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_filter_validate",
"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_filter_validate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "4de4b32ee30076c849505153b35edb0ca0ba4fb734f01794db8eca32dacfe85f",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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