{"id":"ce5095c9-fe4b-4949-8f42-6a6fffa07927","shortId":"WJLTRe","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/wire/26` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform offers 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 listed at the same $0.02/request price point.\n\nThis particular endpoint (`/api/v1/wire/26`) does not have detailed documentation beyond its title \"Premium API Access.\" The crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional content. Without further documentation it is unclear what data or functionality this specific wire endpoint provides — it may be a generic or placeholder entry. The payment mechanism is confirmed live: the 402 challenge specifies USDC on Base (contract 0x8335…2913) with a max amount of 20,000 base units ($0.02).","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-platform","crypto"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","USDC pay-per-call","Base network API","micropayment API","402 payment API"],"warnings":["No documentation available for /api/v1/wire/26 — its actual functionality is unknown","Docs, pricing, and README pages all return only 'Connect wallet' with no content","No OpenAPI or schema definition found","The endpoint name 'Premium API Access' is generic and does not describe functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/26","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/wire/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation for what /api/v1/wire/26 actually returns, no OpenAPI schema, no request/response examples, and the docs/pricing/README pages are all blank beyond a wallet connect prompt. The endpoint's purpose is essentially 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'/request':13,28,156 '0.02':12,27,78,155,240 '000':72,237 '0x8335':229 '20':71,236 '2913':230 '402':66,222 '402 payment API' 'Base network API' 'USDC pay-per-call' 'accept':46 'access':62,92,173 'across':112 'addit':190 'advertis':83 'ai':122 'amount':234 'analysi':126 'analyt':116 'api':5,20,38,61,85,172 'attach':95 'base':8,23,51,73,227,238 'beyond':168 'broader':108 'call':4,19,80 'caller':93 'categori':114 'challeng':67,223 'classif':129 'confirm':219 'connect':185 'content':191 'contract':228 'convers':146 'crawl':175 'data':115,119,199 'detail':166 'doc':176 'document':167,194 'embed':130 'endpoint':55,111,149,161,205 'entri':214 'estim':140 'exchang':135 'export':120 'feed':134 'financ':131 'four':113 'function':201 'gas':139 'generat':147 'generic':211 'geocod':144 'header':100 'http-post' 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'key':86 'learn':124 'limit':89 'list':58,151 'live':220 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':123 'max':233 'may':208 'mechan':217 'metric':117 'micropayment API' 'network':9,24,52 'no-api-key' 'offer':110 'page':180 'particular':160 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,99,105,216 'per':3,18,36,79 'placehold':213 'platform':6,21,39,82,109 'point':158 'premium':60,171 'price':133,157,177 'prompt':187 'proof':106 'protocol':44 'provid':206 'quot':138 'rate':88,136 'readm':179 'report':118 'request':37,68 'return':64,182 'sentiment':125 'simpli':94 'specif':54,203 'specifi':224 'summar':128 'text':127 'titl':170 'token':137 'unclear':197 'unit':74,239 'usdc':15,30,47,76,225 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':186 'web3':132 'wire':204 'without':192 'x':98 'x-payment':97 'x402':11,26,43,104 'x402 API' 'x402-payment'","prices":[{"id":"49f41545-5d88-4b2b-945e-278c117d51ce","listingId":"ce5095c9-fe4b-4949-8f42-6a6fffa07927","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/wire/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:03.482Z"}],"sources":[{"listingId":"ce5095c9-fe4b-4949-8f42-6a6fffa07927","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/26","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:03.482Z","lastSeenAt":"2026-04-22T18:04:39.707Z"}],"details":{"listingId":"ce5095c9-fe4b-4949-8f42-6a6fffa07927","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/26 \\\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":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/26"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/26"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Integrating pay-as-you-go API calls into agent workflows without API key management","Testing x402 protocol payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.394Z"},"updatedAt":"2026-04-22T18:04:39.707Z"}}