{"id":"2926179e-6d14-4f7c-8a08-619b03839343","shortId":"mcT2ZW","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 lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource path `/api/v1/wire/147` is not individually described in the provider's documentation, but the site hosts a broad catalog of API endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request and payable in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain using USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). No API keys are required; callers pay per request by attaching an X-PAYMENT header. The provider advertises no rate limits and instant access.\n\nNote that the specific functionality behind `/api/v1/wire/147` is not documented on the provider's site — the crawled pages only list endpoints under `/api/v1/analytics/`, `/api/v2/ai/`, `/api/v1/finance/`, `/api/v1/crypto/`, and `/api/v1/utils/` paths. The \"wire/147\" path may be an internal or unlisted endpoint. Without further documentation or an OpenAPI schema, the exact input/output behavior of this particular endpoint cannot be confirmed.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","post-method","no-api-key","on-chain-settlement"],"categories":["api-marketplace","infrastructure"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The path /api/v1/wire/147 is not listed among the provider's documented endpoints — its functionality is unknown","No OpenAPI schema or request/response examples are available","Documentation pages (/docs, /api, /pricing, /README) all return only a 'Connect wallet' prompt with no substantive content","The exact behavior and output of this endpoint cannot be verified without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/147","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/147","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific /api/v1/wire/147 path is not documented anywhere on the provider's site. No OpenAPI schema, no input/output examples, and docs/pricing/API pages all render only a 'Connect wallet' prompt with no useful content. The actual functionality of this endpoint is 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'/api/v1/crypto':184 '/api/v1/finance':183 '/api/v1/utils':186 '/api/v1/wire/147':48,165 '/api/v2/ai':182 '/request':13,28 '0.02':12,27,82,129 '000':124 '0x8335':114 '20':123 '2913':115 '6':132 'Base network API' 'USDC API' 'accept':102 'access':7,22,38,158 'advertis':152 'ai':71 'amount':121 'analyt':70 'api':6,21,37,66,135 'attach':144 'base':9,24,91,117,125 'behavior':208 'behind':164 'broad':63 'call':4,19 'caller':139 'cannot':213 'catalog':64 'chain':110 'challeng':95 'confirm':96,215 'contract':113 'crawl':175 'data':69 'decim':133 'describ':52 'document':57,168,200 'endpoint':32,67,98,179,197,212 'equal':128 'exact':206 'financ':74 'function':163 'header':149 'host':61 'individu':51 'infrastructur':77 'input/output':207 'instant':157 'intern':194 'key':136 'learn':73 'limit':155 'list':178 'live':100 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':72 'maximum':120 'may':191 'micropayment API' 'network':92 'no-api-key' 'note':159 'on-chain':108 'on-chain-settlement' 'openapi':203 'page':176 'particular':211 'path':47,187,190 'pay':2,17,140 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':86 'payment':42,105,148 'per':3,18,83,141 'post':103 'post-method' 'premium':5,20,36 'premium API' 'price':80 'protocol':43 'provid':35,55,151,171 'rate':154 'request':84,104,142 'requir':138 'resourc':46 'schema':204 'settl':107 'site':60,173 'span':68 'specif':45,162 'unit':126 'unlist':196 'usdc':15,30,88,112,130 'usdc-base' 'use':111,131 'util':78 'via':10,25,39 'web3':75 'wire/147':189 'without':198 'x':147 'x-payment':146 'x402':11,26,41,94 'x402 endpoint' 'x402-payment'","prices":[{"id":"a91fa1ee-cad2-4a8d-887a-81247e0d0130","listingId":"2926179e-6d14-4f7c-8a08-619b03839343","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/147","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:48.370Z"}],"sources":[{"listingId":"2926179e-6d14-4f7c-8a08-619b03839343","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/147","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:48.370Z","lastSeenAt":"2026-04-22T13:31:59.719Z"}],"details":{"listingId":"2926179e-6d14-4f7c-8a08-619b03839343","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/147 \\\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 provider lists APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories, all priced at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns 402 with maxAmountRequired 20000 in USDC (6 decimals = $0.02) on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/147"}],"useCases":["Programmatic access to a pay-per-call API without needing API keys or subscriptions","Agent-driven workflows that settle per-request payments in USDC on Base","Accessing premium data or utility services with on-chain micropayments"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents with x402-compatible payment capabilities","Users who prefer on-chain USDC settlement over traditional billing"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","High-volume callers who want bulk pricing or subscription discounts","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.116Z"},"updatedAt":"2026-04-22T13:31:59.719Z"}}