{"uid":"cap_Ql6arz5KEd12EajXcNRt_","slug":"signalharness-nft-collection-change-detector-5044bc8e","name":"SignalHarness NFT Collection Change Detector","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/nft_collection_change/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"nft_collection_change_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"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"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QwtYL61UsdnW59ovxO4Zu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes a described NFT collection and identifies or reports changes, events, or shifts in that collection based on caller-supplied data.","exampleAgentPrompt":"Can you check what's changed recently in the Bored Ape Yacht Club NFT collection — things like new listings, sales, or ownership shifts?","exampleUseCases":[{"title":"Post-mint collection shift analysis","prompt":"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?"},{"title":"Monitoring suspicious NFT activity","prompt":"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?"},{"title":"Pre-trade collection due diligence","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:56:15.001Z","isFirstParty":false}