{"id":"bb0521f0-7b16-47df-8e28-a769fcb6993e","shortId":"WQZGW6","kind":"x402","title":"Pay-per-call token data API for APT via x402 on Base network, $0.02/request in USDC.","tagline":"Pay-per-call token data API for APT via x402 on Base network, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides token data for APT (Aptos) via a simple POST request, settled per-call using the x402 protocol on the Base network. Payment is made in USDC at $0.02 per request with no API keys, no rate limits, and no subscriptions required.\n\nThe provider operates a broader platform offering multiple API categories including data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing model.\n\nThe specific endpoint `/api/v1/tokens/APT` appears to be a token information or quote endpoint for the APT token. The x402 challenge confirms the endpoint is live, accepts USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), and requires a maximum payment of 20000 base units (i.e., $0.02 given USDC's 6 decimals). No OpenAPI schema or detailed documentation was found beyond the landing page listing.","tags":[],"capabilities":["token-data","crypto-quotes","x402-payment","per-call-billing","base-network","usdc-settlement"],"categories":["crypto","finance"],"synonyms":["APT token data","Aptos price API","crypto token quotes","x402 crypto API","pay-per-call token endpoint","lowpaymentfee"],"warnings":["No API documentation or schema available — request body and response format are unknown","Docs, pricing, and README pages are empty (just show 'Connect wallet')","The exact data returned for /api/v1/tokens/APT is not documented anywhere in the crawl"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/APT","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/tokens/APT","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear. However, there is no OpenAPI schema, no documented request/response format, no examples, and the docs/pricing/README pages all just show 'Connect wallet' with no useful content. The actual data returned by this endpoint is 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'/request':16,34,128 '0.02':15,33,70,127,172 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':161 '20000':168 '6':176 'APT token data' 'Aptos price API' 'accept':156 'ai':97 'analysi':101 'analyt':96 'api':7,25,75,92 'appear':135 'apt':9,27,45,146 'apto':46 'base':13,31,62,159,169 'base-network' 'beyond':186 'broader':88 'call':4,22,55 'categori':93 'challeng':150 'classif':103 'confirm':151 'contract':160 'convers':120 'crypto token quotes' 'crypto-quotes' 'data':6,24,43,95 'decim':177 'detail':182 'document':183 'embed':104 'endpoint':38,123,133,143,153 'estim':114 'exchang':109 'feed':108 'financ':105 'found':185 'gas':113 'generat':121 'geocod':118 'given':173 'i.e':171 'includ':94 'inform':140 'infrastructur':116 'key':76 'land':188 'learn':99 'limit':79 'list':190 'live':155 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':98 'made':66 'maximum':165 'model':130 'multipl':91 'network':14,32,63 'offer':90 'openapi':179 'oper':86 'page':189 'pay':2,20 'pay-per-cal':1,19 'pay-per-call token endpoint' 'payment':64,166 'per':3,21,54,71 'per-cal':53 'per-call-billing' 'platform':89 'post':50 'price':107,129 'protocol':59 'provid':41,85 'quot':112,142 'rate':78,110 'request':51,72 'requir':83,163 'schema':180 'sentiment':100 'settl':52 'share':124 'simpl':49 'specif':132 'subscript':82 'summar':102 'token':5,23,42,111,139,147 'token-data' 'unit':170 'usdc':18,36,68,157,174 'usdc-settlement' 'use':56 'util':117 'valid':119 'via':10,28,47 'web3':106 'x402':11,29,58,149 'x402 crypto API' 'x402-payment'","prices":[{"id":"2d65a4f3-86a0-4532-8723-9ff8776f8e76","listingId":"bb0521f0-7b16-47df-8e28-a769fcb6993e","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/tokens/APT","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:23.446Z"}],"sources":[{"listingId":"bb0521f0-7b16-47df-8e28-a769fcb6993e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/APT","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:23.446Z","lastSeenAt":"2026-04-24T10:32:02.899Z"}],"details":{"listingId":"bb0521f0-7b16-47df-8e28-a769fcb6993e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/APT \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\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 accepting USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/tokens/APT"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/APT"}],"useCases":["Fetching current APT token information or price data on demand","Integrating token data into trading bots or portfolio dashboards without API key management","Agent-driven lookups of APT token metadata with micropayment settlement"],"bestFor":["Developers needing keyless, pay-per-use crypto token data","AI agents that can settle x402 payments autonomously on Base","Low-volume or bursty workloads where subscriptions are wasteful"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk pricing","Users who need historical time-series data (no evidence this is supported)","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.844Z"},"updatedAt":"2026-04-24T10:32:02.899Z"}}