{"id":"d70400bf-78f3-4495-b022-92c2f0aebfbb","shortId":"x6GE2K","kind":"x402","title":"Pay-per-call FLOW token data via x402 on Base — $0.02/request in USDC, no API keys required.","tagline":"Pay-per-call FLOW token data via x402 on Base — $0.02/request in USDC, no API keys required.","description":"This endpoint at lowpaymentfee.com provides token data for FLOW via a simple POST request, paid per-call using the x402 protocol. The payment is settled in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe endpoint is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all priced uniformly at $0.02 per request. The specific `/api/v1/tokens/FLOW` path sits within the Finance & Web3 category, likely returning token price or market data for the FLOW token.\n\nDocumentation is extremely sparse. The landing page lists available endpoints and pricing, but the /docs, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed field-level documentation available from the crawl. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the exact response schema and accepted request body fields are unknown.","tags":[],"capabilities":["x402-payment","per-call-pricing","usdc-base-settlement","token-data","no-api-key","crypto-market-data"],"categories":["finance","crypto"],"synonyms":["FLOW token price","FLOW token data","crypto token API","pay-per-call token data","x402 token endpoint","FLOW market data","micropayment API"],"warnings":["No API documentation available — /docs, /pricing, and /README pages all render only 'Connect wallet' with no content","No OpenAPI or JSON schema describing request parameters or response format","Response structure for /api/v1/tokens/FLOW is entirely unknown — cannot confirm what token data fields are returned","The endpoint description is generic ('Premium API Access') and does not describe the specific FLOW token data provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/FLOW","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/FLOW","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 with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and documentation pages are empty stubs. The exact data returned and accepted request parameters are 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'/docs':176 '/pricing':177 '/readme':179 '/request':13,32 '0.02':12,31,72,138 '000':78 '20':77 '402':219 '6':82 'FLOW market data' 'FLOW token data' 'FLOW token price' 'accept':228 'account':87 'ai/ml':127 'analyt':126 'api':17,36,85,120 'attach':95 'avail':170,207 'base':11,30,69,79 'bodi':230 'broader':113 'call':4,23,56,119 'caller':93 'categori':150 'challeng':221 'confirm':214 'connect':185 'content':191 'crawl':210 'crypto token API' 'crypto-market-data' 'data':7,26,45,125,157 'decim':83 'detail':202 'document':162,206 'endpoint':40,108,171,212 'exact':224 'exampl':199 'extrem':164 'field':204,231 'field-level':203 'financ':129,148 'flow':5,24,47,160 'header':100 'infer':128 'infrastructur':132 'key':18,37,86 'land':167 'level':205 'like':151 'limit':90 'list':169 'live':215 'lowpaymentfee.com':42,123 'market':156 'maxamountrequir':75 'micropayment API' 'network':70 'no-api-key' 'offer':121 'openapi':195 'page':168,180 'paid':53 'part':110 'path':144 'pay':2,21,117 'pay-per-cal':1,20,116 'pay-per-call token data' 'payment':62,99,105 'per':3,22,55,73,118,139 'per-cal':54 'per-call-pricing' 'post':51 'price':135,154,173 'prompt':187 'proof':106 'proper':218 'protocol':60 'provid':43 'rate':89 'render':182 'request':52,74,140,229 'request/response':198 'requir':19,38,92 'respons':225 'return':152,216 'schema':196,226 'settl':64 'simpl':50 'simpli':94 'sit':145 'span':124 'spars':165 'specif':142 'substant':190 'suit':114 'token':6,25,44,153,161 'token-data' 'uniform':136 'unit':80 'unknown':233 'usdc':15,34,66 'usdc-base-settlement' 'use':57 'util':133 'valid':103 'via':8,27,48 'wallet':186 'web3':130,149 'within':146 'x':98 'x-payment':97 'x402':9,28,59,104,220 'x402 token endpoint' 'x402-payment'","prices":[{"id":"a0325b24-11cf-4bce-9c68-14260df1b8ea","listingId":"d70400bf-78f3-4495-b022-92c2f0aebfbb","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/FLOW","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:00.521Z"}],"sources":[{"listingId":"d70400bf-78f3-4495-b022-92c2f0aebfbb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/FLOW","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:00.521Z","lastSeenAt":"2026-04-23T20:01:29.708Z"}],"details":{"listingId":"d70400bf-78f3-4495-b022-92c2f0aebfbb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/FLOW \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/tokens/FLOW"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/FLOW"}],"useCases":["Fetching current FLOW token price or market data without needing an API key","Integrating FLOW token information into an agent workflow with per-call micropayments","Building crypto dashboards that pay per data request via x402"],"bestFor":["Agents needing on-demand FLOW token data without subscription commitments","Low-volume or sporadic crypto data lookups at $0.02 per call","x402-native workflows on the Base network"],"notFor":["High-frequency trading requiring sub-second latency and bulk pricing","Users who need comprehensive historical FLOW token data or OHLCV candles (no evidence this is supported)","Developers who need detailed API documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:01:46.811Z"},"updatedAt":"2026-04-23T20:01:29.708Z"}}