{"id":"8dbaed10-fde9-4f5a-8499-e96f0fa54f31","shortId":"k7x9GP","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/46`. 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 in USDC on the Base network via the x402 protocol.\n\nThe specific `/api/v1/notifications/46` 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) to the payee address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. No API keys, accounts, or rate limits are advertised — access is purely gated by micropayment.\n\nDocumentation beyond the landing page is sparse. The `/api`, `/pricing`, and `/README` routes all resolve to a wallet-connect stub with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact purpose of the \"notifications/46\" resource (whether it sends, retrieves, or manages a notification) cannot be confirmed from the available material.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","notifications","json-api","no-api-key","micropayment"],"categories":["notifications","infrastructure"],"synonyms":["notification API","x402 notification","pay-per-request API","USDC micropayment API","Base network API","lowpaymentfee","premium API access"],"warnings":["No OpenAPI or schema documentation available for this endpoint.","The exact purpose of /api/v1/notifications/46 (send, retrieve, manage?) is undocumented.","All non-root pages (/api, /pricing, /README) returned only a wallet-connect stub with no content.","No example request or response payloads are available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/notifications/46","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation for this specific endpoint, and the exact functionality of /notifications/46 is unknown. Score reflects a near-stub level of available 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'/api/v1/notifications/46':45,92 '/pricing':156 '/readme':158 '/request':16,32 '0.02':15,31,75,126 '000':120 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':131 '20':119 'Base network API' 'USDC micropayment API' 'accept':94 'access':41,141 'account':135 'addit':170 'address':130 'advertis':140 'ai/ml':65 'analyt':64 'api':40,60,133 'application/json':99 'attach':105 'avail':186,207 'base':8,24,84,121 'beyond':148 'broader':51 'call':4,20,59 'caller':104 'cannot':202 'confirm':204 'connect':166 'contain':111 'data':63,68 'detail':172 'document':147,181 'dozen':54 'endpoint':6,22,34,61,93 'exact':188 'exampl':184 'finance/web3':67 'gate':144 'handl':102 'header':110 'i.e':125 'infer':66 'infrastructur':70 'inlin':103 'json-api' 'key':134 'land':150 'limit':138 'lowpaymentfee' 'lowpaymentfee.com':36 'manag':199 'materi':208 'micropay':146 'micropayment' 'network':85 'no-api-key' 'notif':5,21,42,201 'notification API' 'notifications' 'notifications/46':192 'offer':53 'openapi':176 'page':151 'part':48 'pay':2,18,57 'pay-per-cal':1,17,56 'pay-per-call' 'pay-per-request API' 'paye':129 'payload':185 'payment':100,109,115 'per':3,19,58,76 'platform':52 'post':95 'premium':39 'premium API access' 'price':73 'protocol':89 'provid':37 'pure':143 'purpos':189 'rate':137 'request':77,96 'request/response':179 'resolv':161 'resourc':43,193 'retriev':197 'return':98 'rout':159 'schema':180 'send':196 'settl':11,27,79 'sign':113 'span':62 'spars':153 'spec':177 'specif':91 'stub':167 'technic':171 'unit':122 'usdc':13,29,81,124 'usdc-base' 'util':71 'via':9,25,86 'wallet':165 'wallet-connect':164 'whether':194 'x':108 'x-payment':107 'x402':10,26,88,114 'x402 notification' 'x402-payment'","prices":[{"id":"b33f641e-8a99-4450-b52e-20f42cdf0543","listingId":"8dbaed10-fde9-4f5a-8499-e96f0fa54f31","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:29.163Z"}],"sources":[{"listingId":"8dbaed10-fde9-4f5a-8499-e96f0fa54f31","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/notifications/46","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:29.163Z","lastSeenAt":"2026-04-22T02:32:10.755Z"}],"details":{"listingId":"8dbaed10-fde9-4f5a-8499-e96f0fa54f31","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/notifications/46 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\" \\\n  -d '{}'","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/notifications/46"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/notifications/46"}],"useCases":["Triggering or retrieving notifications via a single paid API call","Integrating pay-per-use notification delivery into agent workflows","Testing x402 micropayment flows against a live endpoint"],"bestFor":["Agents or bots that need simple, keyless API access gated by micropayment","Developers experimenting with x402 protocol integrations on Base","Low-volume, on-demand notification requests without subscription overhead"],"notFor":["High-volume notification pipelines where per-call payment overhead is impractical","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:56.581Z"},"updatedAt":"2026-04-22T02:32:10.755Z"}}