{"id":"9a9c1755-efa4-43cc-83b9-02bc5a91f8c3","shortId":"JK6tNE","kind":"x402","title":"x402-gated backup/data endpoint on Base, paying $0.02 per request in USDC.","tagline":"x402-gated backup/data endpoint on Base, paying $0.02 per request in USDC.","description":"lowpaymentfee.com hosts a collection of x402-protocol pay-per-request API endpoints on the Base network, settling payments in USDC. The specific endpoint at `/api/v1/backups/2024-07` is listed under \"Premium API Access\" and returns JSON data upon payment. 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.\n\nThe broader platform offers endpoints across several categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nThis particular endpoint's path (`/api/v1/backups/2024-07`) suggests it serves backup or archived data from July 2024, though no detailed documentation or schema for the response body is available. The endpoint is live and responds with a proper x402 version 1 challenge on POST requests. Documentation pages on the site (docs, pricing, README) appear to require wallet connection and provide no additional readable content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","backup-data"],"categories":["storage","data"],"synonyms":["data backup API","archived data endpoint","x402 paid API","USDC micropayment API","Base network API","premium data access","pay-per-call API"],"warnings":["No OpenAPI or response schema available for this endpoint","Documentation, pricing, and README pages require wallet connection and yield no readable content","The exact data returned by /api/v1/backups/2024-07 is undocumented — 'backups' and '2024-07' are inferred from the URL path only","No rate limit or uptime guarantees documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2024-07","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/backups/2024-07","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live with a valid x402 challenge, but there is no OpenAPI schema, no response examples, and documentation pages are empty (wallet-gated). The purpose of the specific /backups/2024-07 path is unclear beyond the generic 'Premium API Access' label. Effectively a stub 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'0.02':9,22,85,137 '000':74 '0x8335':79 '1':191 '20':73 '2024':167 '2913':80 '6':89 'Base network API' 'USDC micropayment API' 'access':59 'across':96 'addit':212 'advertis':69 'ai':106 'analysi':110 'analyt':100 'api':39,58,142 'appear':204 'archiv':163 'archived data endpoint' 'avail':179 'backup':161 'backup-data' 'backup/data':4,17 'base':7,20,43,75,82 'base-network' 'bodi':177 'broader':92 'categori':98 'challeng':68,192 'classif':113 'collect':30 'commit':150 'connect':208 'content':214 'convers':130 'data':63,99,103,164 'data backup API' 'decim':90 'detail':170 'doc':201 'document':171,196 'embed':114 'endpoint':5,18,40,51,95,133,154,181 'equal':84 'estim':124 'exchang':119 'export':104 'feed':118 'financ':115 'gas':123 'gate':3,16 'generat':131 'geocod':128 'given':86 'host':28 'infrastructur':126 'insight':105 'json':62 'json-response' 'juli':166 'key':143 'learn':108 'limit':146 'list':55 'live':183 'lowpaymentfee.com':27 'machin':107 'maxamountrequir':71 'metric':101 'minimum':149 'network':44 'no-api-key' 'offer':94 'page':197 'particular':153 'path':156 'pay':8,21,36 'pay-per-call API' 'pay-per-request':35 'payment':46,65 'per':10,23,37,138 'platform':93 'post':194 'premium':57 'premium data access' 'price':117,135,202 'proper':188 'protocol':34 'provid':210 'quot':122 'rate':120,145 'readabl':213 'readm':203 'report':102 'request':11,24,38,139,195 'requir':151,206 'respond':185 'respons':176 'return':61 'schema':173 'sentiment':109 'serv':160 'settl':45 'sever':97 'site':200 'specif':50 'suggest':158 'summar':112 'text':111 'though':168 'token':121 'unit':76 'upon':64 'usdc':13,26,48,78,87 'usdc-settlement' 'util':127 'valid':129 'version':190 'wallet':207 'web3':116 'x402':2,15,33,67,189 'x402 paid API' 'x402-gated':1,14 'x402-payment' 'x402-protocol':32","prices":[{"id":"277decfb-eeb4-48a4-9a2f-4e9ebd30ebfd","listingId":"9a9c1755-efa4-43cc-83b9-02bc5a91f8c3","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/backups/2024-07","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:49.847Z"}],"sources":[{"listingId":"9a9c1755-efa4-43cc-83b9-02bc5a91f8c3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2024-07","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:49.847Z","lastSeenAt":"2026-04-22T16:32:25.955Z"}],"details":{"listingId":"9a9c1755-efa4-43cc-83b9-02bc5a91f8c3","quickStartSnippet":"# Requires an x402-compatible client to attach payment header\ncurl -X POST https://lowpaymentfee.com/api/v1/backups/2024-07 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-07"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","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":["Retrieving archived or backup data from July 2024 via a single paid request","Integrating pay-per-use data access into agent workflows without API key management","Programmatic access to premium data exports settled in USDC on Base"],"bestFor":["Agents or applications needing on-demand backup data without subscription overhead","Developers wanting keyless, crypto-settled API access on Base","Low-frequency data retrieval where per-call pricing is cost-effective"],"notFor":["High-volume bulk data retrieval where per-request costs would accumulate","Users without a Base-compatible USDC wallet or x402 client","Anyone needing detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.139Z"},"updatedAt":"2026-04-22T16:32:25.955Z"}}