{"id":"aa42e897-7635-4eb8-be8a-4ed0547f7c19","shortId":"zYQGCv","kind":"x402","title":"Pay-per-call stock data for ticker APD via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock data for ticker APD via x402 on Base, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides stock data for the ticker APD (Air Products & Chemicals) via an x402-gated API call. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe provider, lowpaymentfee.com, hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per request. The specific endpoint probed here (/api/v1/stocks/APD) is a stock-data endpoint, though the crawled landing page does not list a dedicated \"stocks\" category — it may be part of the Finance & Web3 grouping or an unlisted route. No OpenAPI schema, detailed documentation, or example responses were found in the crawl; the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content.\n\nBecause no response schema or sample output is available, the exact fields returned (e.g., price, volume, historical data) are unknown. Agents should expect a JSON payload related to APD stock information, but the structure must be discovered at call time.","tags":[],"capabilities":["stock-data","per-call-payment","x402-protocol","usdc-settlement","base-network","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["stock price API","APD stock data","Air Products stock","equity data endpoint","pay-per-call stock API","x402 stock data","USDC micropayment API"],"warnings":["No OpenAPI or response schema available — output fields are unknown","The /api/v1/stocks/ path is not listed on the provider's landing page; it may be undocumented or experimental","Docs, pricing, and API pages returned only 'Connect wallet' with no substantive content","No example responses or field descriptions found anywhere in the crawl"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/APD","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/APD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) with clear pricing ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation, no example request/response, and the stocks endpoint is not even listed on the provider's landing page. Effectively a stub with minimal verifiable 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'0.02':77,131 '000':81 '20':80 '6':85 'APD stock data' 'Air Products stock' 'USDC micropayment API' 'accept':56 'agent':221 'ai/ml':121 'air':44 'analyt':120 'apd':9,25,43,229 'api':52,88,117,188 'attach':97 'avail':209 'base':13,29,67,82 'base-network' 'broader':110 'call':4,20,53,116,239 'caller':95 'categori':157 'chemic':46 'coin':72 'connect':194 'content':200 'cost':75 'crawl':148,183 'crypto':124 'data':6,22,39,119,144,218 'decim':86 'dedic':155 'detail':174 'discov':237 'doc':185 'document':175 'e.g':214 'endpoint':34,55,136,145 'equity data endpoint' 'exact':211 'exampl':177 'expect':223 'field':212 'financ':123,164 'found':180 'gate':51 'group':166 'header':101 'histor':217 'host':108 'infer':122 'inform':231 'json':61,225 'json-response' 'key':89 'land':149 'limit':92 'list':153 'lowpaymentfee.com':36,107 'may':159 'must':235 'network':68 'no-api-key' 'openapi':172 'output':207 'page':150,189 'part':161 'pay':2,18,114 'pay-per-cal':1,17,113 'pay-per-call stock API' 'payload':226 'payment':62,100 'per':3,19,78,115,132 'per-call-payment' 'post':57 'price':129,186,215 'probe':137 'product':45 'prompt':196 'provid':37,106 'rate':91 'relat':227 'request':58,79,104,133 'requir':94 'respons':178,203 'return':60,191,213 'rout':170 'sampl':206 'schema':173,204 'servic':127 'settl':14,30,64 'simpli':96 'span':118 'specif':135 'stock':5,21,38,143,156,230 'stock price API' 'stock-data':142 'structur':234 'suit':111 'though':146 'ticker':8,24,42 'time':240 'unit':83 'unknown':220 'unlist':169 'usd':71 'usdc':16,32,70 'usdc-settlement' 'use':69 'util':126 'via':10,26,47 'volum':216 'wallet':195 'web3':165 'x402':11,27,50,99 'x402 stock data' 'x402-gated':49 'x402-protocol'","prices":[{"id":"c031bcf5-10d9-4475-81a1-25d7975e05cd","listingId":"aa42e897-7635-4eb8-be8a-4ed0547f7c19","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/stocks/APD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:18.043Z"}],"sources":[{"listingId":"aa42e897-7635-4eb8-be8a-4ed0547f7c19","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/APD","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:18.043Z","lastSeenAt":"2026-04-23T20:01:25.923Z"}],"details":{"listingId":"aa42e897-7635-4eb8-be8a-4ed0547f7c19","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/APD \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base network at maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/stocks/APD"},{"claim":"Provider lists all APIs at $0.02 per request with no API keys, no rate limits, and Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/APD"}],"useCases":["Fetching current or recent stock data for APD (Air Products & Chemicals)","Integrating real-time equity information into trading bots or dashboards","Agent-driven portfolio monitoring that pays per query with no subscription"],"bestFor":["Agents needing on-demand stock data without API key management","Low-volume or sporadic stock data lookups where per-call pricing is economical","Crypto-native workflows that can settle payments in USDC on Base"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need comprehensive historical stock datasets in batch","Anyone unable to settle USDC payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T19:02:29.669Z"},"updatedAt":"2026-04-23T20:01:25.923Z"}}