{"uid":"cap_ljQhZijudjdwYU-yxn2SO","slug":"signalharness-nft-metadata-validator-a574bf04","name":"SignalHarness NFT Metadata Validator","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_metadata_validate/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"nft_metadata_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Validation does not fetch media or authenticate the collection."],"service_id":"nft_metadata_validate","evidence_scope":"caller_supplied_data","nft_metadata_validation":"{\"errors\":[],\"supplied_fields\":[\"attributes\",\"image\",\"name\"],\"valid\":true}"},"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_metadata_validate","executionId":"example-execution","startedAtMs":0,"amountAtomic":"5000","resultSha256":"529b9d3a8492c95115b1036cbe8feccc4890670969cbf582db02d8f0c2e0a01d","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_dC4YlhBuoeEsQ_oB0zjVI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates NFT metadata supplied by the caller and returns structured validation results with warnings and evidence scope.","exampleAgentPrompt":"Can you validate this NFT metadata for me and flag any warnings or issues before I mint: '{\"name\":\"CryptoKitty #42\",\"description\":\"A rare orange tabby\",\"image\":\"ipfs://Qm...\",\"attributes\":[{\"trait_type\":\"Color\",\"value\":\"Orange\"}]}'?","exampleUseCases":[{"title":"Pre-mint metadata quality check","prompt":"Before I mint this NFT, can you validate the metadata JSON I'm about to submit and tell me if there are any warnings or problems: '{\"name\":\"Pixel Punk #7\",\"description\":\"A pixelated punk character\",\"image\":\"ipfs://QmXyz...\",\"attributes\":[{\"trait_type\":\"Hat\",\"value\":\"Cap\"}]}'?"},{"title":"NFT collection metadata audit","prompt":"I'm launching a 10k NFT collection and want to make sure the metadata template is solid — can you validate this sample metadata entry and list any warnings: '{\"name\":\"AstroApe #1\",\"description\":\"Space-faring ape\",\"external_url\":\"https://astroapes.io\",\"image\":\"ipfs://QmAbc...\",\"attributes\":[]}'?"},{"title":"Marketplace listing compliance check","prompt":"I need to list an NFT on a major marketplace and want to make sure the metadata passes validation — please check this and tell me what's wrong: '{\"name\":\"SkyDragon\",\"image\":\"https://cdn.example.com/dragon.png\",\"attributes\":[{\"trait_type\":\"Rarity\",\"value\":\"Legendary\"}]}'?"}],"resultDescription":"Returns a JSON object with a 'result' field containing: 'nft_metadata_validation' (the main validation output), 'warnings' (an array of warning strings found in the metadata), and 'evidence_scope' (indicating the data source, e.g. 'caller_supplied_data'). Also includes a 'status' field ('succeeded' on success), a signed receipt with payment and execution details, and an artifacts array.","failureModes":["Invalid or malformed JSON string input — returns error status","Input string too short (below minLength of 2) or too large (above maxLength of 65536)","Payment failure or insufficient USDC balance — request blocked before execution","Network or service unavailability — returns non-success status","Metadata content that cannot be parsed as NFT metadata — may return empty or minimal validation result"],"whenToPreferThis":"Choose this endpoint when you need a quick, programmatic, per-call NFT metadata validation with a structured warning list and evidence scope — especially useful for pre-mint checks, marketplace submission pipelines, or automated collection auditing. At $0.005 USDC per call it is cost-effective for single-item or batch-level spot checks. Prefer this over generic JSON schema validators when you need NFT-domain-aware validation logic and a tamper-evident receipt.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T13:06:55.707Z","isFirstParty":false}