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SignalHarness NFT Collection Change Detector
x402
SignalHarness NFT Collection Change Detector is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).
Analyzes a described NFT collection and identifies or reports changes, events, or shifts in that collection based on caller-supplied data.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a structured result containing identified NFT collection changes derived from the caller-supplied request description, along with any warnings about data limitations, an evidence scope indicator ('caller_supplied_data'), and a signed receipt with payment and execution metadata confirming the call was processed.
Example use cases
Post-mint collection shift analysis
“I just launched a new NFT drop for my collection 'Neon Wolves' — can you analyze what changed in the collection after the mint event, including any new owners or floor price movement?”
Monitoring suspicious NFT activity
“I'm tracking the 'CryptoPunks' collection and I think there's been unusual transfer activity in the last 24 hours — can you identify what specifically changed and flag anything worth noting?”
Pre-trade collection due diligence
“Before I buy into the 'Azuki' NFT collection, can you tell me what significant changes have happened to it recently, like metadata updates, new mints, or large wallet movements?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/nft_collection_change/invokeWhen to prefer
Choose this endpoint when you need to extract or summarize changes in an NFT collection based on a textual or structured description of the collection and its recent events, especially in an agent-native workflow where micropayment-per-call (x402) is acceptable. It is well-suited for on-demand, single-call NFT change analysis rather than continuous streaming monitoring.
Side effects
- Empty or too-short request string (minLength:2 not met) returns validation error
- Ambiguous or insufficient collection description may produce empty or low-confidence change results
- Network or payment settlement failure returns non-succeeded status in receipt
- Service unavailability returns error status with no result body
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| nft_collection_change_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Snapshots are caller supplied and not chain verified."
],
"service_id": "nft_collection_change",
"evidence_scope": "caller_supplied_data",
"nft_collection_changes": "{\"added\":[\"2\"],\"changed\":[\"1\"],\"removed\":[],\"unchanged_count\":0}"
},
"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": "nft_collection_change",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "48b6b88108aadad1e8bcafcd1752aa94bc9f3254c1bf88ecaedb6b2cfa837c1e",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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