{"id":"9341e191-eb7c-4b54-9afc-768468372b50","shortId":"pCDDen","kind":"x402","title":"Database snapshot (2023-04) via x402 micropayment on Base — $0.02 per request.","tagline":"Database snapshot (2023-04) via x402 micropayment on Base — $0.02 per request.","description":"This endpoint serves a database snapshot for the period 2023-04, hosted on lowpaymentfee.com. It is part of a broader suite of x402-gated APIs covering data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform follow the same pricing model: $0.02 per request, settled in USDC on the Base network via the x402 protocol.\n\nThe specific endpoint at `/api/v1/database/snapshots/2023-04` accepts POST requests and returns `application/json`. Payment is handled inline — no API keys, no account registration, and no rate limits are advertised. The x402 challenge confirms the endpoint is live, requesting a maximum of 20,000 base units of USDC (0.02 USDC, i.e. $0.02) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nDocumentation on the site 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 description of what the snapshot data actually contains or what fields are returned. The endpoint's purpose must be inferred entirely from its URL path and the generic \"Premium API Access\" label.","tags":[],"capabilities":["x402-payment","usdc-base","database-snapshot","json-response","no-api-key","per-request-pricing"],"categories":["data","storage"],"synonyms":["database snapshot API","historical data export","2023 April snapshot","x402 data endpoint","micropayment database access","USDC API","Base network API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No request or response schema provided; unknown what data the snapshot contains","No OpenAPI spec or ai-plugin manifest found","Endpoint purpose inferred solely from URL path; actual content is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/database/snapshots/2023-04","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/database/snapshots/2023-04","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing, but there is zero documentation on what the snapshot contains, no request/response schema, and no examples. The docs pages are empty. This is effectively a stub 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'/api/v1/database/snapshots/2023-04':88 '0.02':10,22,70,129,132 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '20':123 '2023':3,15,34 '2023 April snapshot' 'Base network API' 'USDC API' 'accept':89 'access':206 'account':103 'actual':182 'address':137 'advertis':110 'ai/ml':54 'analyt':53 'api':50,100,151,205 'application/json':94 'base':9,21,78,125,140 'broader':44 'call':134 'challeng':113 'confirm':114 'connect':159 'contain':183 'content':165 'cover':51 'data':52,181 'databas':1,13,29 'database snapshot API' 'database-snapshot' 'descript':176 'doc':149 'document':141 'endpoint':26,61,86,116,190 'entir':196 'extrem':146 'field':186 'finance/web3':56 'follow':65 'gate':49 'generic':203 'handl':97 'historical data export' 'host':36 'i.e':131 'infer':55,195 'infrastructur':58 'inlin':98 'json-response' 'key':101 'label':207 'limit':108 'live':118 'lowpaymentfee.com':38 'maximum':121 'micropay':7,19 'micropayment database access' 'model':69 'must':193 'network':79 'no-api-key' 'openapi':169 'page':154 'paid':135 'part':41 'path':200 'payment':95 'per':11,23,71,133 'per-request-pricing' 'period':33 'platform':64 'post':90 'premium':204 'price':68,150 'prompt':161 'protocol':83 'purpos':192 'rate':107 'readm':153 'registr':104 'render':156 'request':12,24,72,91,119 'request/response':172 'return':93,188 'schema':173 'serv':27 'settl':73 'site':144 'snapshot':2,14,30,180 'spec':170 'specif':85 'suit':45 'thin':147 'unit':126 'url':199 'usdc':75,128,130 'usdc-base' 'util':59 'via':5,17,80 'wallet':160 'x402':6,18,48,82,112 'x402 data endpoint' 'x402-gated':47 'x402-payment'","prices":[{"id":"31ee2300-4d2c-4f5e-a6ee-317d5e7aa74c","listingId":"9341e191-eb7c-4b54-9afc-768468372b50","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/database/snapshots/2023-04","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T05:29:49.952Z"}],"sources":[{"listingId":"9341e191-eb7c-4b54-9afc-768468372b50","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/database/snapshots/2023-04","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:49.952Z","lastSeenAt":"2026-04-22T08:31:59.137Z"}],"details":{"listingId":"9341e191-eb7c-4b54-9afc-768468372b50","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/database/snapshots/2023-04 \\\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":"Endpoint returns 402 with x402 challenge requesting 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/database/snapshots/2023-04"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/database/snapshots/2023-04"}],"useCases":["Retrieving a historical database snapshot for April 2023","Programmatic access to archived data without account signup","Agent-driven data retrieval with inline USDC micropayment"],"bestFor":["Agents or scripts that need one-off access to a specific historical snapshot","Developers who want keyless, pay-per-call data access on Base","Workflows requiring no subscription commitment for occasional data pulls"],"notFor":["Users who need documentation or schema guarantees before integrating","Bulk or streaming data access where per-request fees would accumulate quickly","Anyone needing current/real-time data (this is a fixed April 2023 snapshot)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.567Z"},"updatedAt":"2026-04-22T08:31:59.137Z"}}