{"id":"4954da42-a4e3-4445-b25a-7a084d4cac0b","shortId":"EqFYhF","kind":"x402","title":"Pay-per-call token data API on Base via x402 — $0.02/request in USDC, no API keys required.","tagline":"Pay-per-call token data API on Base via x402 — $0.02/request in USDC, no API keys required.","description":"lowpaymentfee.com hosts a collection of pay-per-request APIs gated by the x402 protocol on the Base network. The specific endpoint `/api/v1/tokens/FLR` appears to serve token-related data for FLR (Flare). Payment is settled in USDC (contract 0x8335…2913 on Base) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, accounts, or rate limits are advertised — callers simply attach an x402 payment header to each POST request.\n\nThe broader platform offers endpoints across several categories: data & analytics (metrics, reports, insights, data export), AI/ML (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available from the crawled material. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the actual response format for a paid request is unknown.","tags":[],"capabilities":["x402-payment","token-data","per-request-pricing","usdc-settlement","base-network","no-api-key","crypto-market-data"],"categories":["crypto","finance","data"],"synonyms":["FLR token data","Flare token API","crypto token quotes","x402 token endpoint","pay-per-call crypto API","lowpaymentfee","Base USDC API"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema for request or response bodies","Actual response payload for /api/v1/tokens/FLR is completely undocumented","Platform appears to be a generic multi-category API host; quality and reliability of individual endpoints is unverifiable"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/FLR","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/FLR","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 spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The actual data returned for FLR tokens is entirely 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'/request':13,32,163 '0.02':12,31,86,162 '000':90 '0x8335':78 '20':89 '2913':79 '402':215 '6':94 'Base USDC API' 'FLR token data' 'Flare token API' 'account':99 'across':121 'actual':220 'advertis':104 'ai/ml':131 'analysi':133 'analyt':125 'api':7,17,26,36,48,97,172 'appear':62 'attach':107 'avail':202 'base':9,28,56,81,91 'base-network' 'broader':117 'call':4,23 'caller':105 'categori':123 'challeng':217 'classif':136 'collect':42 'confirm':210 'connect':181 'contract':77 'convers':153 'cost':84 'crawl':205 'crypto token quotes' 'crypto-market-data' 'data':6,25,68,124,129 'decim':95 'detail':188 'doc':171 'document':166,197 'embed':137 'endpoint':60,120,156,208 'estim':147 'exampl':200 'exchang':142 'export':130 'extrem':168 'feed':141 'financ':138 'flare':71 'flr':70 'format':222 'gas':146 'gate':49 'generat':154 'geocod':151 'header':111 'host':40 'infrastructur':149 'insight':128 'key':18,37,98 'limit':102 'list':158 'live':211 'lowpaymentfee' 'lowpaymentfee.com':39 'materi':206 'metric':126 'network':57 'no-api-key' 'offer':119 'openapi':192 'page':176 'paid':225 'pay':2,21,45 'pay-per-cal':1,20 'pay-per-call crypto API' 'pay-per-request':44 'payload':201 'payment':72,110 'per':3,22,46,87 'per-request-pricing' 'platform':118 'point':165 'post':114 'price':140,164,173 'prompt':183 'proper':214 'protocol':53 'quot':145 'rate':101,143 'readm':175 'relat':67 'render':178 'report':127 'request':47,88,115,226 'request/response':195 'requir':19,38 'respons':221 'return':212 'schema':196 'sentiment':132 'serv':64 'settl':74 'sever':122 'simpli':106 'spars':169 'spec':193 'specif':59 'summar':135 'technic':187 'text':134 'token':5,24,66,144 'token-data' 'token-rel':65 'unit':92 'unknown':228 'usdc':15,34,76 'usdc-settlement' 'util':150 'valid':152 'via':10,29 'wallet':182 'web3':139 'x402':11,30,52,109,216 'x402 token endpoint' 'x402-payment'","prices":[{"id":"f5a0b2bd-16f6-4dd8-82d7-1ae7c6bea491","listingId":"4954da42-a4e3-4445-b25a-7a084d4cac0b","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/FLR","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:00.441Z"}],"sources":[{"listingId":"4954da42-a4e3-4445-b25a-7a084d4cac0b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/FLR","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:00.441Z","lastSeenAt":"2026-04-24T10:32:05.053Z"}],"details":{"listingId":"4954da42-a4e3-4445-b25a-7a084d4cac0b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/FLR \\\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 a 402 x402 challenge with maxAmountRequired 20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/FLR"},{"claim":"All endpoints priced at $0.02/request with 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/FLR"},{"claim":"Platform offers endpoints across data & analytics, AI/ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching real-time or on-demand data for the FLR (Flare) token","Agent-driven crypto data retrieval with micropayments","Integrating token information into trading bots or dashboards without managing API keys"],"bestFor":["AI agents or bots that need keyless, pay-as-you-go token data","Developers prototyping crypto data integrations without signup friction","Low-volume or sporadic token data lookups where per-call pricing is economical"],"notFor":["High-volume production workloads where $0.02/request adds up quickly","Users who need detailed API documentation or guaranteed SLAs before integrating","Non-crypto use cases (though the platform advertises other endpoint categories)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.116Z"},"updatedAt":"2026-04-24T10:32:05.053Z"}}