{"id":"d8cde98d-d9bb-4423-bad2-ecb60fdae080","shortId":"XHRHjC","kind":"x402","title":"x402-gated backup data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated backup data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a backup resource dated 2023-01 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/backups/2023-01` accepts POST requests and is gated by an x402 payment challenge settled in USDC on the Base network. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is made via the `exact` scheme to the specified payTo address, with a timeout of 300 seconds. The response MIME type is `application/json`.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and more — all at the same $0.02 price point. However, documentation beyond the landing page is extremely sparse; the docs, API, pricing, 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 example payloads available for this or any other endpoint on the platform.","tags":[],"capabilities":["x402-payment","usdc-base","backup-data","json-response","per-request-pricing","no-api-key"],"categories":["storage","data"],"synonyms":["backup API","data backup endpoint","x402 backup","lowpaymentfee backup","USDC API payment","Base network API","pay-per-request backup"],"warnings":["No OpenAPI or schema documentation available for any endpoint on the platform","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","The purpose and contents of the /api/v1/backups/2023-01 resource are undocumented — it may be demo/test data","No request body schema or response schema is documented anywhere","The platform lists many diverse API categories but provides no evidence of actual functionality behind them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2023-01","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/2023-01","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no example payloads. The purpose of the 'backups/2023-01' resource is unclear — it could be test/demo data. The docs, pricing, and README pages are all empty beyond a wallet connect 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'/api/v1/backups/2023-01':96 '0.02':10,24,79,130,180 '000':121 '20':120 '2023':40 '300':147 '6':126 'Base network API' 'USDC API payment' 'accept':97 'access':34 'address':142 'advertis':158 'ai':68 'amount':117 'analysi':162 'analyt':67 'api':63,84,194 'application/json':154 'avail':224 'backup':4,18,37 'backup API' 'backup-data' 'base':8,22,113,122 'beyond':185 'broader':156 'categori':64 'challeng':107 'classif':165 'commit':91 'connect':203 'convers':173 'data':5,19,66 'data backup endpoint' 'date':39 'decim':127 'detail':210 'doc':193 'document':184,219 'embed':166 'endpoint':6,20,30,52,95,159,230 'equal':129 'exact':136 'exampl':222 'exchang':169 'extrem':190 'feed':168 'financ':71 'gate':3,17,102 'geocod':171 'host':59 'howev':183 'includ':65 'infrastructur':74 'json-response' 'key':85 'land':187 'learn':70 'limit':88 'lowpaymentfee backup' 'lowpaymentfee.com':32,56 'machin':69 'made':133 'mani':51 'maximum':116 'mime':151 'network':114 'no-api-key' 'offer':53 'one':49 'openapi':214 'page':188,198 'pay':9,23 'pay-per-request backup' 'payload':223 'payment':45,106,131 'payto':141 'per':11,25,80 'per-request-pricing' 'platform':57,157,233 'point':182 'post':98 'price':77,167,181,195 'prompt':205 'protocol':46 'provid':33 'rate':87,170 'readm':197 'render':200 'request':12,26,81,99 'request/response':217 'requir':92,118 'resourc':38 'respons':150 'schema':218 'scheme':137 'second':148 'sentiment':161 'settl':108 'spars':191 'spec':215 'specif':94 'specifi':140 'summar':164 'technic':209 'text':163 'timeout':145 'type':152 'unit':123 'usdc':14,28,110,125 'usdc-base' 'util':75 'valid':172 'varieti':61 'via':42,134 'wallet':204 'web3':72 'x402':2,16,44,105 'x402 backup' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"538e80c9-6139-44ab-bbda-c187c04906c1","listingId":"d8cde98d-d9bb-4423-bad2-ecb60fdae080","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/2023-01","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:52.228Z"}],"sources":[{"listingId":"d8cde98d-d9bb-4423-bad2-ecb60fdae080","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2023-01","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:52.228Z","lastSeenAt":"2026-04-22T16:32:26.076Z"}],"details":{"listingId":"d8cde98d-d9bb-4423-bad2-ecb60fdae080","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-01 \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-01"},{"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"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived backup data from January 2023","Programmatic access to backup snapshots via micropayment","Agent-driven data retrieval with on-chain USDC settlement"],"bestFor":["Agents needing pay-per-call access to backup data without API key management","Developers experimenting with x402 payment-gated endpoints","Accessing archived data snapshots with minimal friction"],"notFor":["Users needing detailed API documentation or request/response schemas before integrating","High-volume bulk data retrieval where per-request costs add up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.015Z"},"updatedAt":"2026-04-22T16:32:26.076Z"}}