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SignalHarness Agent Handoff Validate
x402
SignalHarness Agent Handoff 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 a JSON payload representing an agent handoff request, returning structural analysis, warnings, and a verifiable execution receipt.
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing a status field ('succeeded' or error), an analysis_json string with structural findings, a list of warnings about the submitted data, an evidence_scope indicator, and a cryptographically verifiable receipt including a SHA-256 result hash, payment ID, request ID, execution ID, network (Base/EIP-155:8453), and USDC amount charged.
Example use cases
Pre-flight check before agent delegation
“Before I hand off this task to my research sub-agent, can you validate this handoff JSON and flag any issues? The payload is: {"agent":"research_bot","task":"find top 10 competitors","priority":"high"}”
Multi-agent pipeline integrity check
“I'm building a multi-agent pipeline and I need to verify that each handoff JSON between agents is structurally valid — can you check this one: {"from":"planner","to":"executor","instructions":"deploy service","params":{"env":"prod"}}”
Debugging malformed agent handoff
“My agent orchestration system is failing at the handoff step — can you run this handoff JSON through validation and tell me what warnings or errors come back? Here's the JSON: {"handoff_type":"delegation","payload":null}”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/agent_handoff_validate/invokeWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call validation of an agent handoff JSON payload before committing to an agent-to-agent delegation in a multi-agent workflow. Useful for pre-flight checks in automated pipelines where structural correctness of handoff instructions is critical and you want an auditable, receipted validation step on Base/USDC infrastructure.
Side effects
- Invalid or non-JSON string in request_json — may return a parsing error or schema violation
- Payload exceeds 65536 character limit — request rejected
- Malformed JSON string shorter than 2 characters — rejected by minLength constraint
- Network or payment settlement failure on Base chain — receipt shows failed status
- Caller-supplied data warnings always included — results are not independently verified by the service
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": "agent_handoff_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": "agent_handoff_validate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "0e9f17ba3b897ec4c0e4e3459ceefdf795ef8dacd32a191b20209b6c62dc9a7a",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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