{"id":"a08075f3-373e-47ef-aeb5-fbadd008c010","shortId":"LAKt84","kind":"x402","title":"Premium API access via x402 payment on Base network, paid per-request in USDC.","tagline":"Premium API access via x402 payment on Base network, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" gated behind an x402 payment challenge. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints use the x402 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/174` is labeled \"Premium API Access\" and costs up to $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme to a designated wallet address on Base. The endpoint accepts POST requests and returns application/json responses. However, the exact functionality behind this particular subscription endpoint is not documented beyond its title — it may represent a bundled or premium-tier access path distinct from the individual utility endpoints listed on the site's homepage.\n\nDocumentation is extremely sparse: the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","micropayment API","lowpaymentfee","crypto-gated API"],"warnings":["No API documentation available — docs/pricing/README pages only show 'Connect wallet'","No OpenAPI spec or request/response schema provided","Actual functionality of this specific endpoint is unclear — 'Premium API Access' is not descriptive","The endpoint path includes 'stripe/subscriptions' which is unusual for an x402-gated endpoint and may indicate incomplete or experimental implementation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/174","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/subscriptions/174","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no request/response schema, no examples, and the actual functionality behind this 'Premium API Access' endpoint is undefined. Effectively a stub 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'0.02':103,115 '000':107 '20':106 '6':113 'Base network API' 'USDC API access' 'accept':76,133 'access':3,18,38,98,164 'addit':198 'address':128 'ai/ml':59 'analyt':58 'api':2,17,37,55,81,97,184 'application/json':138 'avail':214 'base':8,23,74,108,130 'behind':40,144 'beyond':152 'bundl':159 'challeng':44 'collect':49 'commit':88 'connect':193 'content':218 'cost':100 'crawl':217 'crypto-gated API' 'data':57,62 'decim':114 'design':126 'detail':200 'distinct':166 'doc':183 'document':151,178,209 'endpoint':32,67,92,132,148,171 'exact':122,142 'exampl':213 'extrem':180 'finance/web3':61 'function':143 'gate':39 'homepag':177 'host':47 'howev':140 'individu':169 'infer':60 'infrastructur':64 'json-response' 'key':82 'label':95 'limit':85 'list':172 'lowpaymentfee' 'lowpaymentfee.com':34 'made':118 'may':156 'micropayment API' 'network':9,24,75 'no-api-key' 'openapi':204 'page':188 'paid':10,25 'particular':146 'path':165 'pay':52 'pay-per-call API' 'pay-per-request':51 'payment':6,21,43,78,116 'per':12,27,53,104 'per-request':11,26 'post':134 'post-method' 'premium':1,16,36,96,162 'premium-ti':161 'price':185 'prompt':195 'protocol':71 'provid':35 'rate':84 'readm':187 'render':190 'repres':157 'request':13,28,54,105,135 'request/response':207 'requir':89 'respons':139 'return':137 'schema':208 'scheme':123 'site':46,175 'span':56 'spars':181 'spec':205 'specif':91 'subscript':147 'technic':199 'tier':163 'titl':154 'unit':109 'usag':212 'usdc':15,30,77,111 'usdc-base-network' 'use':68 'util':65,170 'via':4,19,119 'wallet':127,194 'x402':5,20,42,70,121 'x402 API' 'x402-payment'","prices":[{"id":"cee88318-a769-4484-9a4d-025ca32a04e1","listingId":"a08075f3-373e-47ef-aeb5-fbadd008c010","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/subscriptions/174","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:35.507Z"}],"sources":[{"listingId":"a08075f3-373e-47ef-aeb5-fbadd008c010","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/174","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:35.507Z","lastSeenAt":"2026-04-22T15:02:03.514Z"}],"details":{"listingId":"a08075f3-373e-47ef-aeb5-fbadd008c010","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/174 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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, accepting USDC on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/174"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/174"}],"useCases":["Accessing premium API services without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven API consumption with per-request crypto payments"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation before integrating","High-volume use cases where per-request pricing may add up","Developers without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.183Z"},"updatedAt":"2026-04-22T15:02:03.514Z"}}