{"id":"35b61cec-cbe3-472d-8809-495b3dcf61ab","shortId":"KKPq6X","kind":"x402","title":"NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.","tagline":"NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.","description":"This endpoint serves NFT metadata for token ID 96 via the x402 payment protocol. It is hosted on lowpaymentfee.com, a platform that offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or upfront commitments required.\n\nThe specific endpoint at `/api/v1/nfts/96/metadata` accepts POST requests and returns JSON. The x402 challenge confirms it is live, advertising a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 `exact` scheme to the payTo address, with a 300-second timeout window.\n\nBecause the endpoint path is scoped to a single NFT token ID (96), it likely returns metadata (name, description, image, attributes) for that specific NFT. The broader platform lists many other endpoints but no OpenAPI schema, request/response examples, or detailed documentation was found during the crawl. The actual content and structure of the metadata response is unknown.","tags":[],"capabilities":["nft-metadata","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["nft","web3"],"synonyms":["NFT metadata API","token metadata","NFT attributes","ERC-721 metadata","on-chain NFT data","x402 NFT endpoint"],"warnings":["No OpenAPI or schema documentation available for this endpoint","Response structure is entirely unknown — no example responses found","Endpoint is scoped to a single NFT token ID (96); unclear if other IDs are available at similar paths","Platform pages beyond the landing page returned only 'Connect wallet' with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/96/metadata","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/nfts/96/metadata","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page listing, and the endpoint is scoped to a single NFT token ID with unknown response 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'/request':16,32 '0.02':15,31,85,140 '000':129 '0x8335':134 '20':128 '2913':135 '300':160 '6':144 '96':41,176 'ERC-721 metadata' 'NFT attributes' 'NFT metadata API' 'accept':110 'actual':211 'address':157 'advertis':123 'ai/ml':68 'amount':126 'analyt':67 'api':64,97 'attribut':184 'base':5,21,93,130,137 'base-network' 'broad':57 'broader':190 'call':9,25 'catalog':58 'challeng':118 'commit':103 'confirm':119 'content':212 'crawl':209 'data':66 'decim':145 'descript':182 'detail':203 'document':204 'endpoint':3,19,34,75,107,166,195 'equal':139 'exact':152 'exampl':201 'finance/web3':70 'found':206 'given':141 'host':49 'id':40,175 'imag':183 'infer':69 'infrastructur':72 'json':115 'key':98 'like':178 'limit':100 'list':192 'live':122 'lowpaymentfee.com':51 'made':148 'mani':193 'max':125 'metadata':2,18,37,180,217 'model':83 'name':181 'network':94 'nft':1,17,36,173,188 'nft-metadata' 'no-api-key' 'offer':55 'on-chain NFT data' 'openapi':198 'path':167 'pay':7,23,61 'pay-per-cal':6,22 'pay-per-request':60 'payment':45,146 'payto':156 'per':8,24,62,86 'platform':53,78,191 'post':111 'price':82 'protocol':46 'rate':99 'request':63,87,112 'request/response':200 'requir':104 'respons':218 'return':114,179 'schema':199 'scheme':153 'scope':169 'second':161 'serv':35 'settl':88 'share':79 'singl':172 'span':65 'specif':106,187 'structur':214 'timeout':162 'token':39,174 'token metadata' 'uniform':81 'unit':131 'unknown':220 'upfront':102 'usdc':13,29,90,133,142 'usdc-settlement' 'util':73 'via':10,26,42,149 'window':163 'x402':11,27,44,117,151 'x402 NFT endpoint' 'x402-payment'","prices":[{"id":"24eee410-2e2b-46e8-b4cb-b4d633311158","listingId":"35b61cec-cbe3-472d-8809-495b3dcf61ab","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/nfts/96/metadata","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.201Z"}],"sources":[{"listingId":"35b61cec-cbe3-472d-8809-495b3dcf61ab","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/96/metadata","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.201Z","lastSeenAt":"2026-04-22T10:33:06.002Z"}],"details":{"listingId":"35b61cec-cbe3-472d-8809-495b3dcf61ab","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/96/metadata \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/96/metadata"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/96/metadata"}],"useCases":["Retrieving metadata (name, image, attributes) for NFT token ID 96","Integrating NFT display data into a wallet or marketplace UI","Programmatic access to NFT metadata without API key management"],"bestFor":["Agents or apps needing on-demand NFT metadata with crypto micropayments","Developers who want keyless, pay-as-you-go API access on Base","Projects already using x402-compatible payment flows"],"notFor":["Bulk retrieval of metadata across many NFT collections (single token ID scoped)","Users who cannot pay in USDC on the Base network","Applications requiring detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:51.313Z"},"updatedAt":"2026-04-22T10:33:06.002Z"}}