{"id":"a63efca2-aeda-478c-bce7-2d9f8847106c","shortId":"2wkTRC","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/wire/120` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol — no API keys, accounts, or rate limits are required; callers simply attach an X-PAYMENT header with a valid payment proof.\n\nThe platform advertises four endpoint 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 uniformly priced at $0.02 per request.\n\nHowever, documentation is extremely thin. 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 usage examples available from the crawled content. The specific functionality of the `/api/v1/wire/120` endpoint (labeled \"Premium API Access\") is not described anywhere on the site, making it unclear what data or service it actually returns. The endpoint is confirmed live via a valid 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","wire API"],"warnings":["The specific functionality of /api/v1/wire/120 ('Premium API Access') is not documented anywhere on the site","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content","No OpenAPI spec, request schema, or response schema is available","No examples of request bodies or response payloads exist in the crawled material","The endpoint name 'wire/120' does not correspond to any of the listed API categories on the homepage"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/120","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/120","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 x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response examples, and the specific purpose of the /api/v1/wire/120 endpoint is entirely undescribed. The docs pages are empty beyond a wallet-connect 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'make':229 'metric':129 'micropayment API' 'network':64 'no-api-key' 'offer':10,29 'openapi':196 'page':180 'pay':2,21,54 'pay-per-cal':1,20 'pay-per-call API' 'pay-per-request':53 'payment':92,114,119 'per':3,22,55,81,167 'platform':6,25,46,122 'premium':73,219 'price':145,164,177 'prompt':187 'proof':120 'protocol':98 'provid':48 'quot':150 'rate':104,148 'readm':179 'render':182 'report':130 'request':56,168 'request/response':199 'requir':107 'return':238 'schema':200 'sentiment':137 'servic':235 'settl':58 'simpli':109 'site':228 'spec':197 'specif':66,212 'summar':140 'technic':191 'text':139 'thin':173 'token':149 'unclear':231 'uniform':163 'unit':86 'usag':204 'usdc':9,28,60,88 'usdc-settlement' 'util':15,34,155 'valid':118,157,246 'via':95,244 'wallet':186 'web3':144 'wire API' 'x':113 'x-payment':112 'x402':43,97 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"ee6eae19-cb10-444f-9315-aea14dfb0d34","listingId":"a63efca2-aeda-478c-bce7-2d9f8847106c","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/120","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:28.239Z"}],"sources":[{"listingId":"a63efca2-aeda-478c-bce7-2d9f8847106c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/120","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:28.239Z","lastSeenAt":"2026-04-22T21:31:49.124Z"}],"details":{"listingId":"a63efca2-aeda-478c-bce7-2d9f8847106c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/120 \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/120"},{"claim":"All endpoints are 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":"The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/120"}],"useCases":["Programmatic access to API services without account registration or API keys","Agent-driven workflows that need on-demand paid API calls settled in crypto","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers wanting zero-signup API access via crypto micropayments","AI agents that can autonomously pay for API calls using x402","Users already holding USDC on Base who want frictionless API consumption"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Production systems requiring well-documented request/response schemas","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.101Z"},"updatedAt":"2026-04-22T21:31:49.124Z"}}