{"id":"77edcdc4-b124-41fb-a367-53aa2cbad380","shortId":"WvSP87","kind":"x402","title":"Pay-per-call token data API on Base — $0.02/request via x402, no API keys required.","tagline":"Pay-per-call token data API on Base — $0.02/request via x402, no API keys required.","description":"lowpaymentfee.com exposes a suite of pay-per-request APIs gated by the x402 payment protocol on the Base network. The specific endpoint `/api/v1/tokens/BNB` returns token-level data for BNB, settling each call in USDC on Base at a cost of $0.02 (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are advertised — callers simply attach an x402 payment header to each request.\n\nThe broader platform lists endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (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 priced uniformly at $0.02 per request.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, 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 crawl. The endpoint is confirmed live (returns a valid x402 402 challenge), but the actual response format for a paid request is unknown.","tags":[],"capabilities":["x402-payment","token-data","per-call-pricing","base-network","usdc-settlement","no-api-key","crypto-market-data"],"categories":["finance","crypto"],"synonyms":["BNB token data","token price API","crypto token info","x402 API","pay-per-call API","Base USDC API","lowpaymentfee"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README all render only a wallet-connect prompt","No OpenAPI or JSON schema describing request parameters or response format","Response payload structure for /api/v1/tokens/BNB is entirely unknown","The platform lists many endpoint categories (AI, analytics, infrastructure) but none have documented behavior — quality of underlying services is unverifiable"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/BNB","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/BNB","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 ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, and all documentation pages are empty stubs showing only 'Connect wallet'. The actual data returned for a paid call is completely 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'/api/v1/tokens/bnb':58 '/docs':161 '/pricing':162 '/readme':165 '/request':11,28 '0.02':10,27,77,153 '000':79 '20':78 '402':205 '6':85 'BNB token data' 'Base USDC API' 'account':90 'across':111 'actual':209 'advertis':95 'ai':121 'analysi':125 'analyt':115 'api':7,15,24,32,44,88 'attach':98 'avail':192 'base':9,26,53,72,80 'base-network' 'bnb':65 'broader':107 'call':4,21,68 'caller':96 'categori':113 'challeng':206 'classif':128 'confirm':199 'connect':171 'convers':145 'cost':75 'crawl':195 'crypto token info' 'crypto-market-data' 'data':6,23,63,114,118 'decim':86 'detail':178 'document':156,187 'embed':129 'endpoint':57,110,148,197 'estim':139 'exampl':190 'exchang':134 'export':119 'expos':36 'extrem':158 'feed':133 'financ':130 'format':211 'four':112 'gas':138 'gate':45 'generat':146 'geocod':143 'header':102 'infrastructur':141 'insight':120 'key':16,33,89 'learn':123 'level':62 'limit':93 'list':109 'live':200 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':122 'metric':116 'network':54 'no-api-key' 'openapi':182 'page':166 'paid':214 'pay':2,19,41 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':40 'payload':191 'payment':49,101 'per':3,20,42,154 'per-call-pricing' 'platform':108 'price':132,150 'prompt':173 'protocol':50 'quot':137 'rate':92,135 'render':168 'report':117 'request':43,105,155,215 'request/response':185 'requir':17,34 'respons':210 'return':59,201 'schema':186 'sentiment':124 'settl':66 'simpli':97 'spars':159 'spec':183 'specif':56 'suit':38 'summar':127 'technic':177 'text':126 'token':5,22,61,136 'token price API' 'token-data' 'token-level':60 'uniform':151 'unit':81 'unknown':217 'usdc':70,83 'usdc-settlement' 'util':142 'valid':144,203 'via':12,29 'wallet':172 'web3':131 'x402':13,30,48,100,204 'x402 API' 'x402-payment'","prices":[{"id":"ef70091c-053a-4219-a7b1-c64e1f59f30b","listingId":"77edcdc4-b124-41fb-a367-53aa2cbad380","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/BNB","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:10.130Z"}],"sources":[{"listingId":"77edcdc4-b124-41fb-a367-53aa2cbad380","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/BNB","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:10.130Z","lastSeenAt":"2026-04-23T20:01:30.438Z"}],"details":{"listingId":"77edcdc4-b124-41fb-a367-53aa2cbad380","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/BNB \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/BNB"},{"claim":"All endpoints 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/BNB"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching BNB token data on-demand without managing API keys","Integrating token information into agent workflows that support x402 payments","Building crypto dashboards that pay per data request"],"bestFor":["Agents or bots that can settle x402 payments on Base","Developers wanting zero-setup, keyless access to token data","Low-volume or sporadic queries where per-call pricing is economical"],"notFor":["High-volume production use where per-call costs add up quickly","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:16:19.97Z"},"updatedAt":"2026-04-23T20:01:30.438Z"}}