{"id":"945a4813-043b-4432-b07a-df2881ff6645","shortId":"vYpAzd","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/accounts/127` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-payment scheme. The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 USD per call. No API keys are required; callers authenticate purely through the x402 payment header. The provider advertises no rate limits and instant access.\n\nWhile the landing page lists numerous endpoints across categories (sentiment analysis, text summarization, price feeds, geocoding, etc.), this specific listing covers the `/api/v1/accounts/127` path. Documentation is extremely sparse — the docs, pricing, API, 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 examples of what this particular accounts endpoint returns. The actual functionality behind this path is unclear from available materials.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-marketplace","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific functionality of /api/v1/accounts/127 is unknown from available materials","No examples or sample responses provided by the provider"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/127","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/accounts/127","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 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the actual functionality of the /api/v1/accounts/127 path is undocumented. This is effectively a stub 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'/request':13,28 '0.02':12,27,76,121 '000':113 '0x8335':97 '20':112 '2913':98 '6':118 'Base network API' 'USDC micropayment API' 'accept':81 'access':7,22,38,146 'account':210 'across':154 'actual':214 'advertis':108,140 'ai':65 'analysi':157 'analyt':64 'api':6,21,37,126,178 'authent':131 'avail':222 'base':9,24,92,114 'behind':216 'broad':60 'call':4,19,124 'caller':130 'catalog':61 'categori':155 'challeng':107 'connect':186 'contract':96 'cover':167 'data':63 'decim':119 'detail':193 'doc':176 'document':171,202 'endpoint':32,52,80,153,211 'equal':120 'etc':163 'exact':102 'exact-pay':101 'exampl':205 'extrem':173 'feed':161 'financ':68 'function':215 'geocod':162 'header':137 'host':58 'infrastructur':71 'instant':145 'json':86 'json-response' 'key':127 'land':149 'learn':67 'limit':143 'list':151,166 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'mani':51 'materi':223 'maxamountrequir':110 'network':93 'no-api-key' 'numer':152 'offer':53 'one':49 'openapi':197 'page':150,181 'particular':209 'path':46,170,218 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,87,103,136 'per':3,18,77,123 'post':82 'post-method' 'premium':5,20,36 'premium API' 'price':74,160,177 'prompt':188 'protocol':43 'provid':35,56,139 'pure':132 'rate':142 'readm':180 'render':183 'request':78,83 'request/response':200 'requir':129 'return':85,212 'schema':201 'scheme':104 'sentiment':156 'settl':89 'span':62 'spars':174 'spec':198 'specif':45,165 'summar':159 'technic':192 'text':158 'unclear':220 'unit':115 'usd':122 'usdc':15,30,95 'usdc-base-network' 'use':94 'util':72 'via':10,25,39 'wallet':187 'web3':69 'x402':11,26,41,106,135 'x402 endpoint' 'x402-payment'","prices":[{"id":"064d3ea8-58c4-4065-b730-a7a86480389b","listingId":"945a4813-043b-4432-b07a-df2881ff6645","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/accounts/127","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:50.980Z"}],"sources":[{"listingId":"945a4813-043b-4432-b07a-df2881ff6645","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/127","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:50.980Z","lastSeenAt":"2026-04-23T07:30:57.640Z"}],"details":{"listingId":"945a4813-043b-4432-b07a-df2881ff6645","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/127 \\\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 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/127"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/127"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic account data retrieval via x402 payment protocol"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.966Z"},"updatedAt":"2026-04-23T07:30:57.640Z"}}