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SignalHarness NFT Royalty Calculator
x402
SignalHarness NFT Royalty Calculator 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).
Calculates NFT royalty amounts based on caller-supplied NFT transaction or sale data
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing the computed NFT royalty calculation result, any warnings about the input data, an evidence scope indicator (caller_supplied_data), the service ID, and a full receipt with payment details, execution metadata, and a SHA256 result hash for verification.
Example use cases
Secondary market royalty payout verification
“I just sold an NFT from the Azuki collection for 3.8 ETH on a secondary marketplace. The creator royalty is set at 7.5%. Can you calculate the exact royalty amount the original creator should receive from this transaction?”
NFT marketplace royalty compliance check
“We're building an NFT marketplace and need to verify royalty calculations. For a sale of 500 USDC on token #1023 with a 5% royalty rate, what is the royalty amount owed to the creator?”
Creator earnings estimation from NFT resale
“As an NFT creator I set a 10% royalty on my collection. Someone just resold one of my pieces for 1.2 ETH — use the royalty calculator to tell me exactly how much I should be receiving.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/nft_royalty_calculate/invokeWhen to prefer
Choose this endpoint when you need a fast, per-call computation of NFT royalty amounts based on caller-supplied transaction data without requiring on-chain lookups. Ideal for marketplace builders, NFT creators, or agents reconciling royalty payouts who already have the relevant sale and royalty parameters available. At $0.005 USDC per call via x402, it suits high-frequency per-transaction checks.
Side effects
- Invalid or malformed nft_royalty_request string returns an error
- Request string below minimum length (2 chars) rejected with validation error
- Missing required nft_royalty_request field returns 400-level error
- Ambiguous or incomplete royalty data may return warnings in the result
- Payment failure via x402 protocol results in 402 response before execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| nft_royalty_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Royalty configuration and enforceability are not independently verified."
],
"service_id": "nft_royalty_calculate",
"evidence_scope": "caller_supplied_data",
"nft_royalty_calculation": "{\"basis_points\":500,\"royalty_atomic\":\"500\",\"sale_atomic\":\"10000\",\"seller_proceeds_before_fees_atomic\":\"9500\"}"
},
"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_royalty_calculate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "dd59eb1aae7d7cf86a56c6302bf1876a304fe43ca30791e9be7203989721fb42",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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