{"id":"60d3cd7b-f5f7-4622-ba59-1caba7a6731f","shortId":"RjHAm5","kind":"x402","title":"Pay-per-call notification endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call notification endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" notification resource at `/api/v1/notifications/65`. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled on the Base network using USDC via the x402 protocol.\n\nThe specific `/api/v1/notifications/65` endpoint accepts POST requests and returns `application/json`. Payment is handled inline: callers attach an `X-PAYMENT` header containing a signed x402 payment for up to 20,000 base units of USDC (i.e., $0.02) on Base. No API keys, subscriptions, or rate limits are advertised — access is purely pay-per-use. The payment recipient address is `0x1A2B…85F3` and the USDC contract used is the canonical Base USDC (`0x8335…2913`).\n\nBecause the endpoint path includes a numeric ID (`/notifications/65`), it likely retrieves or triggers a specific notification resource, but no further documentation, request body schema, or response schema is available from the crawled material. The platform's landing page lists many other endpoints (sentiment analysis, text summarization, geocoding, price feeds, etc.) all at the same $0.02 price point, suggesting a uniform pricing model across the service. Documentation pages (`/api`, `/pricing`, `/README`) returned only a wallet-connect prompt with no additional technical detail.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","notification-api","no-api-key","json-response"],"categories":["notifications","infrastructure"],"synonyms":["notification endpoint","premium API","pay-per-request API","x402 notification","lowpaymentfee","USDC micropayment API","Base network API"],"warnings":["No request body schema or response schema available for /api/v1/notifications/65","Documentation pages (/api, /pricing, /README) returned no useful content — only a wallet-connect prompt","The purpose of the /notifications/65 endpoint is unclear; the numeric ID suggests a specific resource but no context is provided","No OpenAPI spec or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/notifications/65","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/notifications/65","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 captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation on what the notifications endpoint actually does, no request/response schema, and no examples. The crawled docs pages were empty beyond a wallet-connect prompt. This is effectively a stub 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'/api/v1/notifications/65':45,92 '/notifications/65':172 '/pricing':233 '/readme':234 '/request':16,32 '0.02':15,31,75,126,219 '000':120 '0x1a2b':150 '0x8335':162 '20':119 '2913':163 '85f3':151 'Base network API' 'USDC micropayment API' 'accept':94 'access':41,138 'across':227 'addit':244 'address':148 'advertis':137 'ai/ml':65 'analysi':208 'analyt':64 'api':40,60,130 'application/json':99 'attach':105 'avail':193 'base':8,24,82,121,128,160 'base-network' 'bodi':187 'broader':51 'call':4,20,59 'caller':104 'canon':159 'connect':240 'contain':111 'contract':155 'crawl':196 'data':63,68 'detail':246 'document':185,230 'dozen':54 'endpoint':6,22,34,61,93,166,206 'etc':214 'feed':213 'finance/web3':67 'geocod':211 'handl':102 'header':110 'i.e':125 'id':171 'includ':168 'infer':66 'infrastructur':70 'inlin':103 'json-response' 'key':131 'land':201 'like':174 'limit':135 'list':203 'lowpaymentfee' 'lowpaymentfee.com':36 'mani':204 'materi':197 'model':226 'network':83 'no-api-key' 'notif':5,21,42,180 'notification endpoint' 'notification-api' 'numer':170 'offer':53 'page':202,231 'part':48 'path':167 'pay':2,18,57,142 'pay-per-cal':1,17,56 'pay-per-call' 'pay-per-request API' 'pay-per-us':141 'payment':100,109,115,146 'per':3,19,58,76,143 'platform':52,199 'point':221 'post':95 'premium':39 'premium API' 'price':73,212,220,225 'prompt':241 'protocol':89 'provid':37 'pure':140 'rate':134 'recipi':147 'request':77,96,186 'resourc':43,181 'respons':190 'retriev':175 'return':98,235 'schema':188,191 'sentiment':207 'servic':229 'settl':11,27,79 'sign':113 'span':62 'specif':91,179 'subscript':132 'suggest':222 'summar':210 'technic':245 'text':209 'trigger':177 'uniform':224 'unit':122 'usdc':13,29,85,124,154,161 'usdc-settlement' 'use':84,144,156 'util':71 'via':9,25,86 'wallet':239 'wallet-connect':238 'x':108 'x-payment':107 'x402':10,26,88,114 'x402 notification' 'x402-payment'","prices":[{"id":"a44b8083-100e-4c4b-a00d-92cfef0e0474","listingId":"60d3cd7b-f5f7-4622-ba59-1caba7a6731f","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/notifications/65","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:31.875Z"}],"sources":[{"listingId":"60d3cd7b-f5f7-4622-ba59-1caba7a6731f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/notifications/65","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:31.875Z","lastSeenAt":"2026-04-22T04:02:46.307Z"}],"details":{"listingId":"60d3cd7b-f5f7-4622-ba59-1caba7a6731f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/notifications/65 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-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 requiring USDC payment of 20,000 base units ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/notifications/65"},{"claim":"The USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/notifications/65"},{"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 platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Triggering or retrieving a specific notification via a single paid API call","Integrating pay-per-use notification delivery into agent workflows","Testing x402 payment flows against a low-cost live endpoint"],"bestFor":["Agents needing simple pay-per-call notification access without API keys","Developers experimenting with x402 protocol payments on Base","Low-volume, on-demand notification retrieval"],"notFor":["High-volume notification streaming where per-call costs add up","Users who need detailed API 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":"2026-02-17T23:12:51.773Z"},"updatedAt":"2026-04-22T04:02:46.307Z"}}