{"id":"764ceaca-e49e-471a-b574-b401978adfa2","shortId":"zYGQ2q","kind":"x402","title":"x402-gated Stripe charges endpoint on Base, paying $0.02 per request in USDC.","tagline":"x402-gated Stripe charges endpoint on Base, paying $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. The specific resource `/api/v1/stripe/charges/123` accepts POST requests and requires a per-call USDC payment on the Base network. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe provider's landing page lists a broad catalog of API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and instant access. However, the specific endpoint being listed here (`/api/v1/stripe/charges/123`) appears to be a Stripe charges resource, which doesn't clearly map to any of the documented categories. No OpenAPI schema, request/response examples, or detailed documentation were found; the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no substantive content.\n\nBecause the endpoint path references \"stripe/charges/123\" — suggesting it may proxy or wrap a Stripe charge lookup or creation — its exact functionality is unclear from available materials. The x402 challenge confirms the endpoint is live and accepting payment-gated POST requests, but what it returns after payment is not documented.","tags":[],"capabilities":["x402-payment-gated","usdc-base-network","per-request-billing","post-method","stripe-charges"],"categories":["finance","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","Stripe charges proxy","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","Docs, pricing, and API pages all render only a 'Connect wallet' prompt with no substantive content","The endpoint path '/api/v1/stripe/charges/123' references a specific charge ID — unclear if this is a demo, a proxy, or a real Stripe resource","Exact request body format and response structure are unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/123","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/charges/123","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no request/response documentation, and no examples. The endpoint path (stripe/charges/123) is ambiguous and undocumented. Docs pages returned only wallet-connect prompts with no 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'0.02':10,24,80,122 '000':69 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':91 '0x8335':74 '20':68 '2913':75 '300':94 '6':84 'Base network API' 'Stripe charges proxy' 'USDC micropayment endpoint' 'accept':46,223 'access':36,134 'address':90 'advertis':64 'ai':111 'analyt':110 'api':35,107,127,175 'appear':143 'avail':212 'base':8,22,59,70,77 'behind':37 'broad':104 'call':54 'catalog':105 'categori':108,160 'challeng':63,216 'charg':5,19,148,202 'clear':153 'confirm':217 'connect':181 'content':187 'creation':205 'data':109 'decim':85 'detail':167 'doc':172 'document':159,168,237 'doesn':151 'endpoint':6,20,30,138,190,219 'equal':79 'exact':207 'exampl':165 'financ':114 'found':170 'function':208 'gate':3,17,226 'given':81 'howev':135 'infrastructur':117 'instant':133 'key':128 'land':100 'learn':113 'limit':131 'list':102,140 'live':221 'lookup':203 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':112 'map':154 'materi':213 'maxamountrequir':66 'may':196 'network':60 'openapi':162 'page':101,176 'path':191 'pay':9,23 'pay-per-call API' 'payment':40,56,86,225,234 'payment-g':224 'per':11,25,53,123 'per-cal':52 'per-request-billing' 'post':47,227 'post-method' 'premium':34 'price':120,173 'prompt':183 'provid':33,98 'proxi':197 'rate':130 'refer':192 'request':12,26,48,124,228 'request/response':164 'requir':50 'resourc':44,149 'return':178,232 'schema':163 'second':95 'sent':88 'specif':43,137 'stripe':4,18,147,201 'stripe-charges' 'stripe/charges/123':193 'substant':186 'suggest':194 'timeout':96 'unclear':210 'unit':71 'usdc':14,28,55,73,82 'usdc-base-network' 'util':118 'wall':41 'wallet':182 'web3':115 'wrap':199 'x402':2,16,39,62,215 'x402 API' 'x402-gated':1,15 'x402-payment-gated'","prices":[{"id":"92e48288-6569-486b-848b-bfa4113bd745","listingId":"764ceaca-e49e-471a-b574-b401978adfa2","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/charges/123","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:51.298Z"}],"sources":[{"listingId":"764ceaca-e49e-471a-b574-b401978adfa2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/123","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:51.298Z","lastSeenAt":"2026-04-26T01:02:47.463Z"}],"details":{"listingId":"764ceaca-e49e-471a-b574-b401978adfa2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/123 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/stripe/charges/123","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-payment-header>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/123"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/123"},{"claim":"All listed APIs priced at $0.02 per request with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Payment timeout is 300 seconds, payTo address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/123"}],"useCases":["Programmatic access to a Stripe charges resource via x402 micropayment","Agent-driven payment flows where no API key registration is needed","Exploring x402 protocol integration with USDC on Base"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access on Base","Use cases requiring low-friction micropayment-gated endpoints"],"notFor":["Users needing well-documented API contracts with clear request/response schemas","Production workloads requiring guaranteed SLAs or detailed error handling documentation","Anyone looking for free or subscription-based API access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:57.128Z"},"updatedAt":"2026-04-26T01:02:47.463Z"}}