{"id":"6eb249a1-606d-47e8-a6f0-ed3a8d480ce2","shortId":"PLCrQQ","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":"This endpoint at lowpaymentfee.com provides access to a resource described as \"Premium API Access\" at the path `/api/v1/backups/2026-12`. It is part of a broader platform offering dozens of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.\n\nThe specific `/api/v1/backups/2026-12` path suggests a dated backup or snapshot resource (December 2026), though the provider does not document this endpoint separately from its general \"Premium API Access\" label. The x402 challenge is live and well-formed: it requires an exact-scheme payment of 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 given USDC's 6 decimals. Payment is sent to `0x1A2B…85F3` with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.\n\nDocumentation is extremely thin — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples. The platform's landing page lists many endpoints but provides no detail on request formats or response structures. Prospective callers should be prepared to experiment or contact the provider for integration guidance.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","backup-data","post-method"],"categories":["storage","data"],"synonyms":["backup API","data snapshot","premium API","x402 backup","lowpaymentfee","USDC API","Base network API","paid data endpoint"],"warnings":["No documentation available for this specific endpoint — request and response schemas are unknown.","The path '/api/v1/backups/2026-12' suggests a future-dated resource (Dec 2026); purpose is unclear.","Docs, pricing, API, and README pages all render only 'Connect wallet' with no usable content.","No OpenAPI spec or ai-plugin manifest found.","This endpoint is not listed among the provider's advertised APIs on the landing page."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-12","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/2026-12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint exists and its pricing. However, there is zero documentation on request/response schemas, no OpenAPI spec, and the specific backup endpoint is not described anywhere on the site. The docs/pricing/README pages are all empty beyond a wallet-connect 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'0.02':9,22,76,143 '000':133 '0x1a2b':153 '0x8335':138 '20':132 '2026':98 '300':157 '6':147 '85f3':154 'Base network API' 'USDC API' 'accept':162 'access':32,40,113 'ai/ml':66 'analyt':65 'api':39,62,112,175 'application/json':167 'backup':93 'backup API' 'backup-data' 'backup/data':4,17 'base':7,20,84,134,140 'base-network' 'broader':50 'call':61 'caller':221 'challeng':117 'connect':183 'contact':228 'content':189 'data':64,69 'data snapshot' 'date':92 'decemb':97 'decim':148 'describ':36 'detail':213 'doc':173 'document':104,168 'dozen':53 'endpoint':5,18,28,106,161,209 'equal':142 'exact':128 'exact-schem':127 'exampl':201 'experi':226 'extrem':170 'finance/web3':68 'form':123 'format':216 'gate':3,16 'general':110 'given':144 'guidanc':233 'infer':67 'infrastructur':71 'integr':232 'json-response' 'label':114 'land':205 'list':207 'live':119 'lowpaymentfee' 'lowpaymentfee.com':30 'mani':208 'network':85 'offer':52 'openapi':193 'page':178,206 'paid data endpoint' 'part':47 'path':43,89 'pay':8,21,59 'pay-per-cal':58 'pay-per-request' 'payment':130,149 'per':10,23,60,77 'platform':51,203 'post':163 'post-method' 'premium':38,111 'premium API' 'prepar':224 'price':74,174 'prompt':185 'prospect':220 'protocol':57 'provid':31,101,211,230 'readm':177 'render':180 'request':11,24,78,164,215 'request/response':196 'requir':125 'resourc':35,96 'respons':218 'return':166 'schema':197 'scheme':129 'second':158 'sent':151 'separ':107 'settl':79 'snapshot':95 'span':63 'spec':194 'specif':87 'structur':219 'suggest':90 'thin':171 'though':99 'timeout':159 'unit':135 'usag':200 'usdc':13,26,81,137,145 'usdc-settlement' 'util':72 'wallet':184 'well':122 'well-form':121 'x402':2,15,56,116 'x402 backup' 'x402-gated':1,14 'x402-payment' 'x402-protocol':55","prices":[{"id":"9b73147c-2568-4716-8dec-6a27663db9eb","listingId":"6eb249a1-606d-47e8-a6f0-ed3a8d480ce2","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/2026-12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:32.848Z"}],"sources":[{"listingId":"6eb249a1-606d-47e8-a6f0-ed3a8d480ce2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-12","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:32.848Z","lastSeenAt":"2026-04-22T08:31:57.553Z"}],"details":{"listingId":"6eb249a1-606d-47e8-a6f0-ed3a8d480ce2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-12 \\\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 requires 20,000 base units of USDC on Base ($0.02) per request.","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-12"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-12"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no further content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a dated backup or data snapshot for December 2026","Programmatic access to premium data resources via micropayment","Agent-driven data retrieval with no API key required"],"bestFor":["Agents or scripts that need keyless, pay-per-call data access on Base","Users comfortable with x402 payment protocol and USDC on Base","Low-friction one-off data retrieval without subscription commitments"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume consumers who would prefer subscription-based pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.634Z"},"updatedAt":"2026-04-22T08:31:57.553Z"}}