{"id":"ff635b08-1ab5-432b-a657-cf32a67a1402","shortId":"hgDSPa","kind":"x402","title":"Pay-per-call token data API for STX — $0.02 per request via x402 on Base.","tagline":"Pay-per-call token data API for STX — $0.02 per request via x402 on Base.","description":"This endpoint at lowpaymentfee.com provides token data for STX (Stacks) via a simple POST request, settled with USDC on the Base network using the x402 payment protocol. Each call costs $0.02 (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — payment is handled inline via the X-PAYMENT header.\n\nThe endpoint is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 market data, and utility services, all priced uniformly at $0.02 per request. The specific `/api/v1/tokens/STX` route appears to fall under the Finance & Web3 category, likely returning price or market data for the STX token, though the exact response schema is not documented.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response format beyond the MIME type `application/json`. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` in USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.","tags":[],"capabilities":["token-data","stx-price","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","json-response"],"categories":["finance","crypto"],"synonyms":["STX token price","Stacks token data","crypto token quote","STX market data","x402 crypto API","pay-per-request token API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available — response format is entirely undocumented","All doc/pricing/API pages return only a 'Connect wallet' prompt with no usable content","Exact fields returned for /api/v1/tokens/STX are unknown; 'token data' is inferred from the URL pattern","No SLA, rate-limit, or uptime guarantees documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/STX","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/STX","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages render only 'Connect wallet'. The actual data returned is 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'0.02':10,26,63,124 '000':65 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':218 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':221 '20':64 '6':71 'STX market data' 'STX token price' 'Stacks token data' 'accept':214 'address':217 'ai/ml':112 'analyt':111 'api':7,23,74,108,165 'appear':131 'application/json':198 'base':16,32,53,66,223 'base-network' 'beyond':194 'broader':99 'call':4,20,61,107 'categori':138 'challeng':201 'commit':80 'confirm':208 'connect':171 'cost':62 'crypto token quote' 'data':6,22,39,110,116,144 'decim':72 'descript':189 'detail':177 'doc':162 'document':156,157 'dozen':102 'endpoint':34,94,210 'exact':151 'exampl':184 'extrem':159 'fall':133 'financ':136 'finance/web3':114 'form':207 'format':193 'handl':85 'header':92 'infer':113 'inlin':86 'json-response' 'key':75 'like':139 'limit':77 'live':203 'lowpaymentfee' 'lowpaymentfee.com':36 'market':115,143 'mime':196 'network':54 'no-api-key' 'offer':101 'openapi':181 'oper':212 'page':166 'part':96 'pay':2,18,105 'pay-per-cal':1,17,104 'pay-per-call' 'pay-per-request token API' 'payload':186 'payment':58,83,91,215 'per':3,11,19,27,106,125 'platform':100 'post':46 'price':121,141,163 'prompt':173 'protocol':59 'provid':37 'rate':76 'render':168 'request':12,28,47,126 'request/response':185 'requir':82 'respons':152,192 'return':140 'rout':130 'schema':153 'servic':119 'settl':48 'simpl':45 'span':109 'spars':160 'spec':182 'specif':128 'stack':42 'stx':9,25,41,147 'stx-price' 'though':149 'token':5,21,38,148 'token-data' 'type':197 'uniform':122 'unit':67 'upfront':79 'usdc':50,69,220 'usdc-settlement' 'use':55 'util':118 'via':13,29,43,87 'wallet':172 'web3':137 'well':206 'well-form':205 'x':90 'x-payment':89 'x402':14,30,57,200 'x402 crypto API' 'x402-payment'","prices":[{"id":"23c10510-5ad9-4f13-b0c0-70cda1f9606d","listingId":"ff635b08-1ab5-432b-a657-cf32a67a1402","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/STX","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:17.652Z"}],"sources":[{"listingId":"ff635b08-1ab5-432b-a657-cf32a67a1402","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/STX","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:17.652Z","lastSeenAt":"2026-04-23T20:03:02.918Z"}],"details":{"listingId":"ff635b08-1ab5-432b-a657-cf32a67a1402","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/STX \\\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":"Endpoint returns 402 with x402 challenge accepting USDC on Base at 20000 base units (~$0.02)","source_url":"https://lowpaymentfee.com/api/v1/tokens/STX"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/STX"},{"claim":"Docs, pricing, API, and README pages all render only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching current STX token price or market data in an automated pipeline","Agent-driven portfolio tracking that needs on-demand token quotes","Building a dashboard that pulls live STX data without managing API keys"],"bestFor":["AI agents or bots that can settle x402 payments on Base","Developers who want zero-signup, pay-as-you-go token data","Low-volume or bursty workloads where per-call pricing is economical"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need detailed historical OHLCV data (response schema unknown)","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.218Z"},"updatedAt":"2026-04-23T20:03:02.918Z"}}