{"id":"0e7ab1f4-8fc5-4dae-a249-33801377c2ed","shortId":"F49KgF","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 provides access to a Stripe invoice resource (invoice ID 151) behind an x402 paywall. The endpoint accepts POST requests and returns application/json responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals).\n\nThe parent site lowpaymentfee.com hosts a broader catalog of x402-gated APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are advertised at $0.02 per request with no API keys, no rate limits, and instant access.\n\nDocumentation is extremely sparse — 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. The specific purpose and data returned by the /stripe/invoices/151 endpoint is unclear beyond the generic \"Premium API Access\" label. The x402 challenge was successfully captured (HTTP 402), confirming the endpoint is live.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid endpoint","USDC micropayment API","pay-per-request API","Base network API","lowpaymentfee"],"warnings":["No OpenAPI spec or request/response schema available","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content","The specific data returned by /stripe/invoices/151 is undocumented — 'Premium API Access' is the only description","Purpose of exposing a single Stripe invoice (ID 151) behind a paywall is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/151","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and network details, but there is zero documentation on request format, response schema, or what data the endpoint actually returns. The /docs, /pricing, and /README pages are all empty beyond a wallet-connect prompt. The specific purpose of 'stripe/invoices/151' is 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'/docs':146 '/pricing':148 '/readme':150 '/stripe/invoices/151':186 '0.02':73,128 '000':77 '0x8335':66 '151':42 '20':76 '2913':67 '402':204 '6':81 'Base network API' 'USDC micropayment API' 'accept':49 'access':34,140,195 'advertis':126 'ai/ml':99 'analysi':102 'analyt':98 'api':95,133,194 'application/json':54 'avail':177 'base':8,22,61,78 'base-network' 'behind':43 'beyond':190 'broader':89 'call':12,26 'captur':202 'catalog':90 'challeng':199 'classif':104 'confirm':205 'connect':156 'contract':65 'convers':121 'cost':71 'data':97,182 'decim':82 'detail':163 'document':141,172 'embed':105 'endpoint':6,20,30,48,124,187,207 'estim':115 'exampl':176 'exchang':110 'extrem':143 'feed':109 'financ':106 'gas':114 'gate':3,17,94 'generat':122 'generic':192 'geocod':119 'host':87 'http':203 'id':41 'infer':100 'infrastructur':117 'instant':139 'invoic':5,19,38,40 'key':134 'label':196 'limit':137 'live':209 'lowpaymentfee' 'lowpaymentfee.com':32,86 'maximum':70 'network':62 'no-api-key' 'openapi':167 'page':151 'parent':84 'pay':10,24 'pay-per-cal':9,23 'pay-per-call' 'pay-per-request API' 'payment':56 'paywal':46 'per':11,25,74,129 'post':50 'premium':193 'price':108 'prompt':158 'provid':33 'purpos':180 'quot':113 'rate':111,136 'render':153 'request':51,75,130 'request/response':170 'resourc':39 'respons':55 'return':53,183 'schema':171 'sentiment':101 'settl':58 'site':85 'span':96 'spars':144 'spec':168 'specif':179 'stripe':4,18,37 'stripe invoice API' 'stripe-invoice' 'success':201 'summar':103 'technic':162 'token':112 'unclear':189 'unit':79 'usag':175 'usdc':14,28,64 'usdc-settlement' 'use':63 'util':118 'valid':120 'wallet':157 'web3':107 'x402':2,16,45,93,198 'x402 paid endpoint' 'x402-gated':1,15,92 'x402-payment'","prices":[{"id":"fe86dbb1-906a-417c-b404-65d25acb89a5","listingId":"0e7ab1f4-8fc5-4dae-a249-33801377c2ed","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:41.457Z"}],"sources":[{"listingId":"0e7ab1f4-8fc5-4dae-a249-33801377c2ed","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/151","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:41.457Z","lastSeenAt":"2026-04-25T13:03:04.248Z"}],"details":{"listingId":"0e7ab1f4-8fc5-4dae-a249-33801377c2ed","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/151 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge, confirming it is live on Base network using USDC","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/151"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/151"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) contain only 'Connect wallet' text","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving Stripe invoice data via a single micropayment without API key registration","Programmatic access to invoice #151 for automated billing workflows","Agent-driven payment-gated API consumption on Base L2"],"bestFor":["Developers wanting keyless, pay-per-call access to invoice data","AI agents that can settle x402 payments in USDC on Base","Prototyping micropayment-gated API patterns"],"notFor":["Users needing detailed API documentation or request/response schemas before integrating","Bulk invoice retrieval or batch processing across many invoices","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.858Z"},"updatedAt":"2026-04-25T13:03:04.248Z"}}