{"id":"9cd3d8be-ddb8-4eac-981d-50a1639a3716","shortId":"UxGbfn","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.","description":"This endpoint at lowpaymentfee.com exposes a Stripe invoice resource (`/api/v1/stripe/invoices/85`) behind an x402 payment challenge. It is part of a broader platform that offers dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint listed here is labeled \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme: callers include an X-PAYMENT header with a signed payment to the provider's address on Base. The response MIME type is application/json. The endpoint accepts POST requests and is discoverable. No API keys or rate limits are advertised; access is purely payment-gated.\n\nDocumentation on the site is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact data returned by this Stripe invoices endpoint is unknown from the available material. The platform appears to be a demonstration or early-stage deployment of x402-powered microservices.","tags":[],"capabilities":["x402-payment-gating","usdc-base-network","stripe-invoice-access","pay-per-request","json-response","no-api-key-required"],"categories":["finance","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Stripe invoice API","Base network API","lowpaymentfee","402 payment required API"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages are all empty beyond a wallet connect prompt","No request or response schema provided; the exact data returned by this endpoint is unknown","The endpoint path references a specific Stripe invoice ID (85), which may be a demo or placeholder resource","Platform appears to be early-stage or a proof-of-concept; reliability and longevity are uncertain"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/85","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/stripe/invoices/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, and all documentation pages are empty stubs. The purpose and output of this specific Stripe invoices endpoint cannot be determined from available 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'/api/v1/stripe/invoices/85':38 '/docs':168 '/pricing':169 '/readme':172 '0.02':94 '000':98 '20':97 '402 payment required API' '6':104 'Base network API' 'Stripe invoice API' 'USDC micropayment API' 'accept':140 'access':91,154 'address':129 'advertis':153 'ai/ml':63 'analyt':62 'api':59,90,147 'appear':216 'application/json':137 'avail':198,212 'base':8,22,78,99,131 'behind':39 'broader':49 'call':12,26 'caller':114 'challeng':43 'connect':178 'content':184 'cost':93 'crypto':66 'data':61,201 'decim':105 'demonstr':220 'deploy':225 'discover':145 'document':160,193 'dozen':53 'earli':223 'early-stag':222 'endpoint':6,20,30,84,139,207 'exact':112,200 'exampl':196 'expos':33 'extrem':165 'financ':65 'gate':3,17,71,159 'header':120 'includ':115 'infer':64 'invoic':5,19,36,206 'json-response' 'key':148 'label':88 'limit':151 'list':85 'lowpaymentfee' 'lowpaymentfee.com':32 'made':108 'materi':213 'microservic':230 'mime':134 'network':79 'no-api-key-required' 'offer':52 'openapi':188 'page':173 'part':46 'pay':10,24,56 'pay-per-cal':9,23 'pay-per-call API' 'pay-per-request':55 'payload':197 'payment':42,106,119,124,158 'payment-g':157 'per':11,25,57,95 'platform':50,215 'post':141 'power':229 'premium':89 'prompt':180 'protocol':75 'provid':127 'pure':156 'rate':150 'render':175 'request':58,96,142 'request/response':191 'resourc':37 'respons':133 'return':202 'schema':192 'scheme':113 'servic':69 'sign':123 'site':163 'span':60 'spars':166 'spec':189 'specif':83 'stage':224 'stripe':4,18,35,205 'stripe-invoice-access' 'type':135 'unit':100 'unknown':209 'usdc':14,28,81,102 'usdc-base-network' 'use':80 'util':68 'via':72,109 'wallet':179 'x':118 'x-payment':117 'x402':2,16,41,74,111,228 'x402 API' 'x402-gated':1,15 'x402-payment-gating' 'x402-powered':227","prices":[{"id":"d05d8b6d-e39d-4f50-a685-ebcb3110edc5","listingId":"9cd3d8be-ddb8-4eac-981d-50a1639a3716","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/stripe/invoices/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:09.099Z"}],"sources":[{"listingId":"9cd3d8be-ddb8-4eac-981d-50a1639a3716","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:09.099Z","lastSeenAt":"2026-04-25T05:33:15.626Z"}],"details":{"listingId":"9cd3d8be-ddb8-4eac-981d-50a1639a3716","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/85 \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 in USDC","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/85"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/85"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a Connect wallet prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving Stripe invoice data without traditional API key authentication","Programmatic access to invoice records via crypto micropayments","Agent-driven invoice lookups settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-use access to invoice data","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or response schemas before integrating","High-volume invoice retrieval where per-call pricing adds up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.526Z"},"updatedAt":"2026-04-25T05:33:15.626Z"}}