{"id":"104ca59e-85ca-4ab5-ac5f-2506f96423c7","shortId":"zqJh94","kind":"x402","title":"Pay-per-call Stripe invoice endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call Stripe invoice endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoices resource via the x402 payment protocol. The specific path `/api/v1/stripe/invoices/10` suggests retrieval or creation of a Stripe invoice (likely invoice ID 10). Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). The endpoint accepts POST requests and returns application/json.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto data feeds, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. Each endpoint uses the x402 protocol on Base, meaning callers attach an X-PAYMENT header with a signed USDC payment to authenticate and pay in a single step.\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 from the crawled content. The endpoint is confirmed live (returns a proper 402 challenge), but the actual behavior and response format of the Stripe invoices endpoint remain undocumented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoices","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice api","x402 stripe","pay-per-request api","usdc api payment","base network api","micropayment api","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or schema definition for request or response payloads","Unclear what the Stripe invoices endpoint actually returns or requires as input","The endpoint path includes a hardcoded ID (/invoices/10) which may indicate a demo or limited resource","No evidence of rate limits, SLAs, or uptime guarantees"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/10","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts payments. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The actual functionality of the Stripe invoices endpoint is unclear — it could be a demo or placeholder. This is effectively a stub 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'/request':17,34 '0.02':16,33,90,137 '000':85 '0x8335':77 '10':66 '20':84 '2913':78 '402':228 '6':95 'accept':99 'access':40 'actual':232 'advertis':109 'ai/ml':121 'analysi':124 'analyt':120 'api':117,142,185 'application/json':104 'attach':160 'authent':172 'avail':215 'base':9,26,72,86,157 'base network api' 'base-network' 'behavior':233 'broader':106 'call':4,21,116 'caller':159 'challeng':229 'classif':126 'commit':149 'confirm':223 'connect':194 'content':219 'contract':76 'cost':82 'crawl':218 'creation':58 'data':119,129 'decim':96 'detail':201 'doc':184 'document':179,210 'embed':127 'endpoint':7,24,36,98,151,221,241 'equal':89 'exampl':214 'extrem':181 'feed':130 'finance/crypto':128 'format':236 'header':165 'id':65 'infer':122 'infrastructur':132 'invoic':6,23,44,62,64,240 'json-response' 'key':143 'like':63 'limit':146 'live':224 'lowpaymentfee' 'lowpaymentfee.com':38,107 'maximum':81 'mean':158 'micropayment api' 'network':73 'no-api-key' 'openapi':205 'page':189 'path':53 'pay':2,19,114,174 'pay-per-cal':1,18,113 'pay-per-call' 'pay-per-request api' 'payment':49,67,164,170 'per':3,20,91,115,138 'platform':108 'post':100 'price':135,186 'prompt':196 'proper':227 'protocol':50,155 'provid':39 'rate':145 'readm':188 'remain':242 'render':191 'request':92,101,139 'request/response':208 'resourc':45 'respons':235 'retriev':56 'return':103,225 'schema':209 'sentiment':123 'settl':12,29,69 'sign':168 'singl':177 'span':118 'spars':182 'spec':206 'specif':52 'step':178 'stripe':5,22,43,61,239 'stripe invoice api' 'stripe-invoices' 'suggest':55 'suit':111 'summar':125 'technic':200 'undocu':243 'unit':87 'usag':213 'usdc':14,31,75,93,169 'usdc api payment' 'usdc-settlement' 'use':74,94,152 'util':133 'via':10,27,46 'wallet':195 'x':163 'x-payment':162 'x402':11,28,48,154 'x402 stripe' 'x402-payment'","prices":[{"id":"6c779bb0-43be-4dc4-8919-c36e69927fec","listingId":"104ca59e-85ca-4ab5-ac5f-2506f96423c7","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:24.081Z"}],"sources":[{"listingId":"104ca59e-85ca-4ab5-ac5f-2506f96423c7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:24.081Z","lastSeenAt":"2026-04-25T16:03:44.416Z"}],"details":{"listingId":"104ca59e-85ca-4ab5-ac5f-2506f96423c7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/10 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","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 maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/10"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/10"},{"claim":"The platform offers APIs across data analytics, AI/ML, finance/crypto, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatically retrieving or creating Stripe invoices via a pay-per-call model without needing API keys","Integrating invoice data into agent workflows that can settle payments on Base in USDC","Testing x402 payment protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that need Stripe invoice access without managing API credentials","Low-volume, pay-as-you-go invoice operations"],"notFor":["High-volume Stripe integrations where direct Stripe API access is more cost-effective","Users who need detailed documentation or guaranteed SLAs","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.714Z"},"updatedAt":"2026-04-25T16:03:44.416Z"}}