{"id":"dcf742f8-0297-4e55-bfd0-b0ca9f1270d5","shortId":"upXrXG","kind":"x402","title":"Pay-per-call stock quote for NOC (Northrop Grumman) via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock quote for NOC (Northrop Grumman) via x402 on Base, settled in USDC.","description":"This endpoint provides stock data for the ticker NOC (Northrop Grumman) through a simple POST request, paid per call using the x402 protocol. It is part of a broader suite of APIs hosted at lowpaymentfee.com that span data analytics, AI/ML inference, finance, crypto, and utility services — all sharing the same pay-per-request pricing model.\n\nThe endpoint accepts x402 payments on the Base network using USDC (contract 0x8335…2913). The maximum amount required per request is 20,000 base units of USDC, which at 6 decimals equals $0.02 USD. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The response MIME type is application/json.\n\nDocumentation beyond the landing page is extremely thin: the /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no sample request/response, and no description of the JSON fields returned for a stock quote. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation means callers must discover the response shape empirically.","tags":[],"capabilities":["stock-quote","per-call-payment","x402","usdc-settlement","base-network","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["stock price API","NOC stock data","Northrop Grumman quote","equity data endpoint","x402 stock API","pay-per-call stock quote","micropayment stock data"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt with no content.","No OpenAPI or JSON schema describing the request body or response fields for the stock quote.","Response structure must be discovered empirically; there is no guarantee of what fields are returned.","The broader lowpaymentfee.com platform lists many endpoints but provides no detailed docs for any of them."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/NOC","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/stocks/NOC","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 well-formed x402 challenge with clear pricing, but there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty stubs. The actual stock data payload is completely 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'/docs':166 '/pricing':167 '/readme':170 '0.02':123 '000':113 '0x8335':103 '20':112 '2913':104 '402':211 '6':120 'NOC stock data' 'Northrop Grumman quote' 'accept':93 'ai/ml':74 'amount':107 'analyt':73 'api':66,128 'application/json':156 'attach':139 'base':14,31,98,114 'base-network' 'beyond':158 'broader':63 'call':4,21,53 'caller':137,219 'challeng':212 'commit':136 'confirm':206 'connect':176 'content':182 'contract':102 'crypto':77 'data':39,72 'decim':121 'descript':193 'discov':221 'document':157,217 'empir':225 'endpoint':36,92,204 'equal':122 'equity data endpoint' 'extrem':163 'field':197 'financ':76 'grumman':10,27,45 'header':144 'host':67 'infer':75 'json':196 'json-response' 'key':129 'lack':215 'land':160 'limit':132 'live':207 'lowpaymentfee.com':69 'maximum':106 'mean':218 'micropayment stock data' 'mime':153 'model':90 'must':220 'network':99 'no-api-key' 'noc':8,25,43 'northrop':9,26,44 'openapi':186 'page':161,171 'paid':51 'part':60 'pay':2,19,86 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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/stocks/NOC","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:19.271Z"}],"sources":[{"listingId":"dcf742f8-0297-4e55-bfd0-b0ca9f1270d5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/NOC","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:19.271Z","lastSeenAt":"2026-04-23T20:01:25.984Z"}],"details":{"listingId":"dcf742f8-0297-4e55-bfd0-b0ca9f1270d5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/NOC \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\"","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/stocks/NOC"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/stocks/NOC"},{"claim":"The site advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) contain only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching current or recent stock data for Northrop Grumman (NOC) in an automated trading or research pipeline","Integrating low-friction, keyless stock data access into an AI agent workflow","Paying per request for occasional stock lookups without maintaining a subscription"],"bestFor":["Agents or bots that need on-demand stock data without API key management","Low-volume, pay-as-you-go stock data consumers","Developers experimenting with x402 payment-gated APIs"],"notFor":["High-frequency trading requiring sub-millisecond latency and guaranteed SLAs","Users who need comprehensive historical OHLCV data or full market coverage (only NOC ticker at this path)","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T08:05:33.759Z"},"updatedAt":"2026-04-23T20:01:25.984Z"}}