{"id":"f449b253-a8d0-4d33-977e-25155604e0ed","shortId":"mG8Xkn","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 95 via a POST request, gated behind an x402 payment challenge. It is hosted on lowpaymentfee.com, a platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per call and settled in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/nfts/95/metadata` returns JSON (MIME type `application/json`) and requires an x402 payment header with a maximum amount of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the \"exact\" scheme, with a timeout of 300 seconds.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, the actual content returned by this NFT metadata endpoint is not documented — there is no OpenAPI schema, no example response, and no detailed documentation beyond the landing page listing. The broader site offers many other endpoints (sentiment analysis, text summarization, geocoding, price feeds, etc.) all at the same $0.02 price point, but specifics about the NFT metadata payload are unknown.","tags":[],"capabilities":["nft-metadata","x402-payment","usdc-settlement","base-network","pay-per-request","json-response"],"categories":["web3","nft"],"synonyms":["NFT metadata API","token metadata","NFT token info","on-chain metadata","x402 NFT endpoint","Base USDC API"],"warnings":["No documentation exists for the NFT metadata response schema or fields","No example responses available — actual payload content is unknown","Only token ID 95 is referenced; unclear if other token IDs are supported at similar paths","Broader site pages (/api, /pricing, /README) returned no useful content beyond 'Connect wallet'"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/95/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/95/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 example request/response, no documentation of what the NFT metadata payload contains, and the crawled pages beyond the landing page returned only 'Connect wallet' with no useful content. This is effectively a stub 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'/request':16,32 '0.02':15,31,81,131,211 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':139 '0x8335':119 '20':113 '2913':120 '300':148 '6':126 '95':41 'Base USDC API' 'NFT metadata API' 'NFT token info' 'access':161 'actual':164 'address':138 'advertis':152 'ai/ml':72 'amount':111 'analysi':200 'analyt':71 'api':68,154 'application/json':101 'base':5,21,90,115,122 'base-network' 'behind':47 'beyond':187 'broader':193 'call':9,25,83 'challeng':51 'content':165 'data':70 'decim':127 'detail':185 'document':174,186 'endpoint':3,19,34,94,171,198 'etc':206 'exact':142 'exampl':181 'feed':205 'finance/web3':74 'gate':46 'geocod':203 'header':107 'host':54 'howev':162 'id':40 'infer':73 'infrastructur':76 'instant':160 'json':98 'json-response' 'key':155 'land':189 'limit':158 'list':191 'lowpaymentfee.com':56 'made':136 'mani':196 'maximum':110 'metadata':2,18,37,170,219 'mime':99 'network':91 'nft':1,17,36,169,218 'nft-metadata' 'offer':60,195 'on-chain metadata' 'openapi':178 'page':190 'pay':7,23,65 'pay-per-cal':6,22 'pay-per-request':64 'payload':220 'payment':50,106,134 'per':8,24,66,82,132 'platform':58,151 'point':213 'post':44 'price':79,204,212 'rate':157 'request':45,67,133 'requir':103 'respons':182 'return':97,166 'schema':179 'scheme':143 'second':149 'sentiment':199 'serv':35 'settl':85 'sinc':123 'site':194 'span':69 'specif':93,215 'summar':202 'text':201 'timeout':146 'token':39 'token metadata' 'translat':129 'type':100 'unit':116 'unknown':222 'usdc':13,29,87,118,124 'usdc-settlement' 'use':125,140 'util':77 'varieti':62 'via':10,26,42 'x402':11,27,49,105 'x402 NFT endpoint' 'x402-payment'","prices":[{"id":"4cc70587-7128-447e-9dcf-b4c825aa0855","listingId":"f449b253-a8d0-4d33-977e-25155604e0ed","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/95/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":"2026-04-21T18:32:32.378Z"}],"sources":[{"listingId":"f449b253-a8d0-4d33-977e-25155604e0ed","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/95/metadata","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.378Z","lastSeenAt":"2026-04-22T09:02:26.114Z"}],"details":{"listingId":"f449b253-a8d0-4d33-977e-25155604e0ed","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/95/metadata \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/95/metadata"},{"claim":"Max amount required is 20000 base units of USDC (6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/nfts/95/metadata"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/95/metadata"}],"useCases":["Retrieving metadata for NFT token ID 95 programmatically","Integrating NFT metadata into a dApp or marketplace UI","Agent-driven NFT data retrieval with micropayments"],"bestFor":["Developers needing on-demand NFT metadata without API key management","Agents that can settle x402 payments in USDC on Base","Low-volume or sporadic NFT metadata lookups at $0.02/call"],"notFor":["Bulk NFT metadata retrieval across many token IDs (only token 95 is documented at this path)","Users who cannot settle USDC payments on the Base network","Applications requiring detailed schema guarantees or SLA commitments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:51.077Z"},"updatedAt":"2026-04-22T09:02:26.114Z"}}