{"id":"4af3a0d8-9cbb-4539-8cc0-087fc1b2cfdc","shortId":"bGD9Uw","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at `/api/v1/wire/52` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are gated via the x402 protocol, settling payments in USDC on the Base network. The specific endpoint probed (`/api/v1/wire/52`) is labeled \"Premium API Access\" but its exact functionality is not documented — it does not correspond to any of the named endpoints listed on the site's landing page.\n\nPricing is $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which at 6 decimals equals $0.02). The platform advertises no API keys, no rate limits, no minimums, and instant access. Payment is handled entirely through the x402 payment header using USDC (contract `0x8335…2913`) on Base.\n\nDocumentation is extremely sparse. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The site lists many other endpoints (analytics, AI inference, finance, utilities) all at the same $0.02 price point, but none include detailed documentation. Because the specific wire/52 endpoint is not described anywhere on the site, its actual behavior and response format remain unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["api-gateway","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["The endpoint /api/v1/wire/52 does not appear in the site's listed API catalog — its actual functionality is unknown.","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content.","No OpenAPI spec, request schema, or response schema is available.","No usage examples or error documentation exist."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/52","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear at $0.02/request in USDC on Base. However, the specific /api/v1/wire/52 endpoint is not documented anywhere on the site, there is no OpenAPI spec, no request/response schema, no examples, and all documentation pages are empty. This is effectively a stub 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'/api/v1/wire/52':34,82 '/docs':171 '/pricing':173 '/readme':175 '/request':13,28 '0.02':12,27,114,135,216 '000':125 '0x8335':162 '20':124 '2913':163 '6':132 'Base network API' 'USDC micropayment API' 'access':7,22,87,149 'actual':237 'addit':186 'advertis':120,138 'ai':54,208 'analyt':53,207 'anywher':232 'api':6,21,50,86,140 'avail':200 'base':9,24,76,126,165 'base-network' 'behavior':238 'call':4,19 'challeng':119 'collect':44 'connect':181 'content':187 'contract':161 'correspond':98 'crypto-paid API' 'data':52 'decim':133 'describ':231 'detail':222 'document':94,166,223 'endpoint':32,63,80,104,206,228 'entir':153 'equal':134 'exact':90 'exampl':199 'extrem':168 'financ':57,210 'format':241 'function':91 'gate':65 'handl':152 'header':158 'includ':221 'infer':209 'infrastructur':60 'instant':148 'key':141 'label':84 'land':110 'learn':56 'limit':144 'list':105,203 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':55 'mani':204 'maxamountrequir':122 'minimum':146 'name':103 'network':77 'no-api-key' 'none':220 'offer':42 'openapi':191 'page':111,176 'part':36 'pay':2,17,47 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':46 'payment':71,150,157 'per':3,18,48,115 'platform':40,137 'point':218 'premium':5,20,85 'price':112,217 'probe':81 'prompt':183 'protocol':69 'rate':143 'remain':242 'render':178 'request':49,116 'request/response':194 'respons':240 'schema':195 'settl':70 'site':108,202,235 'span':51 'spars':169 'spec':192 'specif':79,226 'unit':127 'unknown':243 'usag':198 'usdc':15,30,73,129,160 'usdc-settlement' 'use':159 'util':61,211 'via':10,25,66 'wallet':182 'web3':58 'wire/52':227 'x402':11,26,68,118,156 'x402 API' 'x402-payment'","prices":[{"id":"2032573f-4f85-4767-8ce5-9a36904a658c","listingId":"4af3a0d8-9cbb-4539-8cc0-087fc1b2cfdc","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:15.557Z"}],"sources":[{"listingId":"4af3a0d8-9cbb-4539-8cc0-087fc1b2cfdc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/52","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:15.557Z","lastSeenAt":"2026-04-22T08:31:54.948Z"}],"details":{"listingId":"4af3a0d8-9cbb-4539-8cc0-087fc1b2cfdc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/52 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The site lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request.","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, no minimums, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/wire/52"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to various data and utility endpoints"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or rate-limit guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.812Z"},"updatedAt":"2026-04-22T08:31:54.948Z"}}