{"id":"5471bf14-18f0-4371-a83a-f2c80d49181a","shortId":"FtjVAU","kind":"x402","title":"Database snapshot (2024-03) via x402 micropayment on Base — $0.02 per request.","tagline":"Database snapshot (2024-03) via x402 micropayment on Base — $0.02 per request.","description":"This endpoint serves a database snapshot for the period 2024-03, hosted on lowpaymentfee.com. It is part of a broader suite of x402-payable APIs covering data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 \"exact\" scheme.\n\nThe x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this equals $0.02 per request — consistent with the provider's published flat pricing of $0.02/request across all endpoints. No API keys are required; access is granted instantly upon payment. The provider claims no rate limits and no minimum commitments.\n\nDocumentation 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, and no description of what the \"database snapshots/2024-03\" dataset actually contains. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what data is returned or what POST body, if any, is expected.","tags":[],"capabilities":["x402-payment","usdc-base","database-snapshot","json-response","per-request-micropayment","no-api-key"],"categories":["data","storage"],"synonyms":["database export","data snapshot","2024-03 snapshot","lowpaymentfee API","x402 data endpoint","micropayment database","Base USDC API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet' with no technical content.","No request body schema or response schema provided; it is unknown what data this endpoint returns.","The nature of the 'database snapshots/2024-03' dataset is completely undocumented.","No OpenAPI or ai-plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/database/snapshots/2024-03","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/2024-03","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response schema, and no description of what the snapshot data actually contains. This is effectively a stub 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'/api':147 '/docs':146 '/pricing':148 '/readme':150 '/request':116 '0.02':10,22,103,115 '000':93 '0x8335':78 '20':92 '2024':3,15,34 '2024-03 snapshot' '2913':79 '402':190 '6':99 'Base USDC API' 'accept':62 'access':125 'across':117 'actual':181 'advertis':88 'ai/ml':54 'analyt':53 'api':50,121 'base':9,21,73,94 'bodi':205 'broader':44 'challeng':87,191 'claim':133 'commit':140 'connect':156 'consist':106 'contain':182 'contract':77 'cover':51 'data':52,199 'data snapshot' 'databas':1,13,29,178 'database export' 'database-snapshot' 'dataset':180 'decim':100 'descript':174 'detail':163 'document':141,194 'endpoint':26,61,119,184 'equal':102 'exact':83 'expect':209 'extrem':143 'finance/web3':56 'flat':112 'grant':127 'host':36 'infer':55 'infrastructur':58 'instant':128 'json':67 'json-response' 'key':122 'limit':136 'live':186 'lowpaymentfee API' 'lowpaymentfee.com':38 'maxamountrequir':90 'micropay':7,19 'micropayment database' 'minimum':139 'network':74 'no-api-key' 'openapi':167 'page':151 'part':41 'payabl':49 'payment':68,130 'per':11,23,104 'per-request-micropayment' 'period':33 'post':63,204 'price':113 'prompt':158 'provid':109,132 'publish':111 'rate':135 'render':153 'request':12,24,64,105 'request/response':170 'requir':124 'return':66,187,201 'schema':171 'scheme':84 'serv':27 'settl':70 'sinc':96 'snapshot':2,14,30 'snapshots/2024-03':179 'spars':144 'spec':168 'suit':45 'technic':162 'unclear':197 'unit':95 'upon':129 'usdc':76,97 'usdc-base' 'use':75,98 'util':59 'valid':189 'via':5,17 'wallet':157 'without':193 'x402':6,18,48,82,86 'x402 data endpoint' 'x402-payable':47 'x402-payment'","prices":[{"id":"73eca17a-d13a-495c-81d2-90f522ffac7a","listingId":"5471bf14-18f0-4371-a83a-f2c80d49181a","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/2024-03","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T05:29:58.238Z"}],"sources":[{"listingId":"5471bf14-18f0-4371-a83a-f2c80d49181a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/database/snapshots/2024-03","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:58.238Z","lastSeenAt":"2026-04-22T07:32:06.877Z"}],"details":{"listingId":"5471bf14-18f0-4371-a83a-f2c80d49181a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/database/snapshots/2024-03 \\\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 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/database/snapshots/2024-03"},{"claim":"Flat pricing of $0.02 per request across all endpoints, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/database/snapshots/2024-03"}],"useCases":["Retrieving a historical database snapshot for March 2024","Programmatic data access without API key registration","Agent-driven data procurement via x402 micropayments"],"bestFor":["Agents that need one-shot data retrieval with crypto micropayments","Developers wanting keyless, pay-per-use database access on Base","Automated pipelines that settle payments in USDC on Base L2"],"notFor":["Users who need detailed documentation or schema guarantees before purchasing","Bulk or streaming data access (each request costs $0.02 individually)","Non-crypto users who cannot settle USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.143Z"},"updatedAt":"2026-04-22T07:32:06.877Z"}}