{"id":"ffa901e0-669d-4aa1-82b5-82829dfe2a78","shortId":"t5DhJg","kind":"x402","title":"x402-gated premium API access on Base network, pay-per-request with USDC.","tagline":"x402-gated premium API access on Base network, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints on the platform, which offers data & analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities—all gated behind per-request USDC micropayments on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/106` is listed as \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme: callers include an X-PAYMENT header with a signed payment to the specified address on Base. No API keys, rate limits, or subscriptions are required—just a funded wallet.\n\nThe platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, the specific functionality behind the `/api/v1/stripe/invoices/106` path is not well-documented beyond the generic \"Premium API Access\" label. The endpoint accepts POST requests and returns application/json responses.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","stripe invoices API","402 payment required"],"warnings":["No documentation available for this specific endpoint's functionality or expected input/output","Docs, pricing, and API pages all render only 'Connect wallet' with no content","The endpoint path '/api/v1/stripe/invoices/106' suggests invoice-related functionality but this is unconfirmed","No OpenAPI spec or schema available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/106","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/106","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation on what this specific endpoint does, no request/response schema, no examples, and the crawled docs/pricing/API pages are all blank beyond a 'Connect wallet' prompt. The endpoint path suggests Stripe invoice functionality but nothing confirms 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'0.02':88,100 '000':92 '20':91 '402 payment required' '6':98 'Base network API' 'USDC pay-per-call' 'accept':190 'access':6,21,38,85,186 'address':123 'advertis':141 'ai/ml':57 'analysi':150 'analyt':56 'api':5,20,37,84,127,185 'application/json':195 'base':8,23,74,93,125 'base-network' 'behind':66,172 'beyond':181 'caller':109 'categori':142 'classif':153 'convers':165 'cost':87 'data':55,60,146 'decim':99 'document':180 'embed':154 'endpoint':32,49,78,189 'estim':162 'exact':107 'exchang':157 'export':147 'feed':156 'finance/web3':59 'function':171 'fund':137 'gas':161 'gate':3,18,65 'generat':167 'generic':183 'geocod':163 'header':115 'howev':168 'includ':110,143 'infer':58 'infrastructur':62 'insight':148 'json-response' 'key':128 'label':187 'limit':130 'list':81 'lowpaymentfee' 'lowpaymentfee.com':34 'made':103 'mani':48 'metric':144 'micropay':71 'micropayment API' 'network':9,24,75 'no-api-key' 'offer':54 'one':46 'path':175 'pay':11,26 'pay-per-request':10,25 'payment':42,101,114,119 'per':12,27,68,89 'per-request':67 'platform':52,140 'post':191 'premium':4,19,36,83,184 'price':155 'protocol':43 'provid':35 'quot':160 'rate':129,158 'report':145 'request':13,28,69,90,192 'requir':134 'respons':196 'return':194 'scheme':108 'sentiment':149 'sign':118 'specif':77,170 'specifi':122 'stripe invoices API' 'subscript':132 'summar':152 'text':151 'token':159 'unit':94 'usdc':15,30,70,96 'usdc-micropayment' 'util':63 'valid':164 'via':39,104 'wallet':138 'well':179 'well-docu':178 'x':113 'x-payment':112 'x402':2,17,41,106 'x402 API' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"42790ae6-7409-41e7-98be-17fdff76a245","listingId":"ffa901e0-669d-4aa1-82b5-82829dfe2a78","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/106","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:31.260Z"}],"sources":[{"listingId":"ffa901e0-669d-4aa1-82b5-82829dfe2a78","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/106","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:31.260Z","lastSeenAt":"2026-04-25T14:32:46.687Z"}],"details":{"listingId":"ffa901e0-669d-4aa1-82b5-82829dfe2a78","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/106 \\\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 USDC base units","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/106"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/106"}],"useCases":["Programmatic access to premium data or services without subscription commitments","Agent-driven API consumption with per-call crypto payments","Testing x402 payment protocol integrations"],"bestFor":["Developers wanting pay-per-use API access without API keys","AI agents with USDC wallets on Base network","Low-volume or sporadic API consumers who don't want subscriptions"],"notFor":["High-volume consumers who need bulk pricing or rate guarantees","Users without a Base network wallet or USDC holdings","Anyone needing detailed documentation on what the endpoint actually returns"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.303Z"},"updatedAt":"2026-04-25T14:32:46.687Z"}}