{"id":"6d78b436-0b63-4fc4-9680-9cdd53bd5cfe","shortId":"Sqtq6T","kind":"x402","title":"Berkshire Hathaway (BRK.B) earnings data via pay-per-call x402 endpoint on Base.","tagline":"Berkshire Hathaway (BRK.B) earnings data via pay-per-call x402 endpoint on Base.","description":"This endpoint at lowpaymentfee.com provides earnings data for Berkshire Hathaway Class B shares (ticker BRK.B) through the x402 payment protocol. Each request costs $0.02 in USDC on the Base network — no API keys, no subscriptions, and no rate limits. The endpoint accepts POST requests and returns JSON.\n\nThe provider, lowpaymentfee.com, operates a broader catalog of pay-per-request APIs spanning finance, analytics, AI/ML, crypto, and utility services, all priced at $0.02 per call and settled in USDC on Base. This specific endpoint sits under the Finance & Web3 category alongside price feeds, exchange rates, token quotes, and gas estimates.\n\nDocumentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns a valid x402 402 challenge), but the exact request body format and response structure for earnings data are unknown and must be discovered by the caller.","tags":[],"capabilities":["stock-earnings-data","brk-b-ticker","x402-payment","usdc-base-settlement","pay-per-request","json-response","no-api-key"],"categories":["finance"],"synonyms":["Berkshire Hathaway earnings","BRK.B earnings API","stock earnings data","equity earnings report","financial data API","x402 finance endpoint"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all return only a wallet-connect prompt with no content.","No OpenAPI or output schema provided; request body format and response structure are unknown.","Earnings data scope, freshness, and source are undocumented — data quality cannot be verified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/finance/BRK.B/earnings","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/finance/BRK.B/earnings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no examples, and all documentation pages are empty stubs. The actual data content and format are entirely 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'/docs':134 '/pricing':136 '/readme':138 '0.02':52,100 '402':174 'BRK.B earnings API' 'Berkshire Hathaway earnings' 'accept':70 'ai/ml':92 'alongsid':118 'analyt':91 'api':60,88 'avail':164 'b':40 'base':14,28,57,108 'berkshir':1,15,37 'bodi':180 'brk-b-ticker' 'brk.b':3,17,43 'broader':81 'call':10,24,102 'caller':196 'catalog':82 'categori':117 'challeng':175 'class':39 'confirm':168 'connect':144 'content':150 'cost':51 'crawl':133 'crypto':93 'data':5,19,35,187 'discov':193 'document':128,159 'earn':4,18,34,186 'endpoint':12,26,30,69,111,166 'equity earnings report' 'estim':127 'exact':178 'exampl':162 'exchang':121 'extrem':130 'feed':120 'financ':90,115 'financial data API' 'format':181 'gas':126 'hathaway':2,16,38 'json':75 'json-response' 'key':61 'limit':67 'live':169 'lowpaymentfee.com':32,78 'must':191 'network':58 'no-api-key' 'openapi':154 'oper':79 'page':139 'pay':8,22,85 'pay-per-cal':7,21 'pay-per-request':84 'payload':163 'payment':47 'per':9,23,86,101 'post':71 'price':98,119 'prompt':146 'protocol':48 'provid':33,77 'quot':124 'rate':66,122 'request':50,72,87,179 'request/response':157 'respons':183 'return':74,141,170 'schema':158 'servic':96 'settl':104 'share':41 'sit':112 'span':89 'spars':131 'spec':155 'specif':110 'stock earnings data' 'stock-earnings-data' 'structur':184 'subscript':63 'ticker':42 'token':123 'unknown':189 'usdc':54,106 'usdc-base-settlement' 'util':95 'valid':172 'via':6,20 'wallet':145 'web3':116 'x402':11,25,46,173 'x402 finance endpoint' 'x402-payment'","prices":[{"id":"9d3fd85d-3d51-4b0b-9371-cb4e297dc950","listingId":"6d78b436-0b63-4fc4-9680-9cdd53bd5cfe","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/finance/BRK.B/earnings","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:38.606Z"}],"sources":[{"listingId":"6d78b436-0b63-4fc4-9680-9cdd53bd5cfe","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/finance/BRK.B/earnings","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:38.606Z","lastSeenAt":"2026-04-23T20:01:27.578Z"}],"details":{"listingId":"6d78b436-0b63-4fc4-9680-9cdd53bd5cfe","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/finance/BRK.B/earnings \\\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 a valid x402 402 challenge with maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/finance/BRK.B/earnings"},{"claim":"The provider advertises $0.02 per request, no API keys, no rate limits, instant access, Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base.","source_url":"https://lowpaymentfee.com"},{"claim":"Finance & Web3 category includes price feeds, exchange rates, token quotes, and gas estimates alongside this endpoint.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving Berkshire Hathaway (BRK.B) earnings data for financial analysis","Programmatic access to stock earnings without API key management","Agent-driven portfolio research that needs on-demand earnings lookups"],"bestFor":["Developers or agents needing quick BRK.B earnings data without subscriptions","x402-compatible agents that can pay per request in USDC on Base","Lightweight financial data retrieval without rate-limit concerns"],"notFor":["Bulk historical earnings across many tickers (only BRK.B at this endpoint)","Users who need detailed API documentation or guaranteed response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:46:03.643Z"},"updatedAt":"2026-04-23T20:01:27.578Z"}}