{"id":"046c4b9f-2044-41f5-b12f-8b0b3ca734d3","shortId":"rFSUP2","kind":"x402","title":"Query Alpha Vantage stock market data via an x402-payable agent endpoint on Base Sepolia.","tagline":"Query Alpha Vantage stock market data via an x402-payable agent endpoint on Base Sepolia.","description":"This endpoint exposes an Alpha Vantage API MCP server as an x402-payable agent, hosted by Questflow. It accepts a natural-language text input and returns a string response, enabling LLMs and agentic workflows to retrieve real-time and historical stock market data without managing API keys directly. Payment is handled via the x402 protocol using USDC on the Base Sepolia testnet.\n\nThe agent is accessed by sending a POST request with an `input` field (your message/query) and including an `X-PAYMENT` header that satisfies the x402 challenge. The maximum payment required per call is 100,000 units of the USDC asset (contract `0x036CbD53842c5426634e7929541eC2318f3dCF7e`) on Base Sepolia, with a maximum timeout of 1,200 seconds. The response is a JSON object containing a `response` string field.\n\nDocumentation is minimal. There is no OpenAPI spec, no dedicated docs page, and no detailed description of which Alpha Vantage endpoints or functions are available through this agent. The hosting platform (Questflow / intra-tls2.dctx.link) is primarily marketed as an AI clone trading platform, and this particular agent appears to be one of many deployable agents on that infrastructure. Because the network is Base Sepolia (a testnet), this endpoint is likely in a development or preview state and should not be relied upon for production workloads.","tags":[],"capabilities":["stock-market-data","alpha-vantage-proxy","x402-payment","natural-language-query","base-sepolia-usdc","agent-endpoint"],"categories":["finance","llm"],"synonyms":["Alpha Vantage API","stock data API","market data agent","financial data endpoint","Questflow agent","x402 stock API","real-time stock prices","historical stock data"],"warnings":["Endpoint is on Base Sepolia (testnet) — likely not production-ready","No OpenAPI or documentation available; all capability details are inferred from the x402 challenge","The hosting platform (Questflow) markets itself as an AI clone trading platform; the Alpha Vantage agent is a secondary offering with unclear maintenance status","Exact Alpha Vantage functions/endpoints accessible through this agent are undocumented","Example response is fabricated for illustration — actual format may differ"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x407f86ab87AcCbe739aE15b08093D079059525b1","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963","description":"The official Alpha Vantage API MCP server enables LLMs and agentic workflows to seamlessly interact with real-time and historical stock market data. | Powered by Questflow","outputSchema":{"input":{"type":"http","method":"POST","bodyFields":{"input":{"type":"string","required":true,"description":"Your message to the agent"}},"discoverable":true},"output":{"response":{"type":"string","required":true,"description":"Response from the agent"}}},"maxAmountRequired":"100000","maxTimeoutSeconds":1200}]},"qualityScore":"0.250","qualityRationale":"No OpenAPI spec, no docs page, no detailed capability list, and the endpoint runs on a testnet (Base Sepolia). The only schema information comes from the x402 challenge's outputSchema. The response example is entirely 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'0x036cbd53842c5426634e7929541ec2318f3dcf7e':140 '1':149 '100':132 '200':150 'Alpha Vantage API' 'Questflow agent' 'accept':52 'access':101 'agent':12,28,47,67,99,190,208,216 'agent-endpoint' 'ai':201 'alpha':2,18,37,181 'alpha-vantage-proxy' 'api':39,81 'appear':209 'asset':138 'avail':187 'base':15,31,95,142,224 'base-sepolia-usdc' 'call':130 'challeng':124 'clone':202 'contain':158 'contract':139 'data':6,22,78 'dedic':172 'deploy':215 'descript':178 'detail':177 'develop':234 'direct':83 'doc':173 'document':163 'enabl':64 'endpoint':13,29,34,183,229 'expos':35 'field':110,162 'financial data endpoint' 'function':185 'handl':86 'header':119 'histor':75 'historical stock data' 'host':48,192 'includ':114 'infrastructur':219 'input':58,109 'intra-tls2.dctx.link':195 'json':156 'key':82 'languag':56 'like':231 'llms':65 'manag':80 'mani':214 'market':5,21,77,198 'market data agent' 'maximum':126,146 'mcp':40 'message/query':112 'minim':165 'natur':55 'natural-languag':54 'natural-language-query' 'network':222 'object':157 'one':212 'openapi':169 'page':174 'particular':207 'payabl':11,27,46 'payment':84,118,127 'per':129 'platform':193,204 'post':105 'preview':236 'primarili':197 'product':245 'protocol':90 'queri':1,17 'questflow':50,194 'real':72 'real-tim':71 'real-time stock prices' 'reli':242 'request':106 'requir':128 'respons':63,153,160 'retriev':70 'return':60 'satisfi':121 'second':151 'send':103 'sepolia':16,32,96,143,225 'server':41 'spec':170 'state':237 'stock':4,20,76 'stock data API' 'stock-market-data' 'string':62,161 'testnet':97,227 'text':57 'time':73 'timeout':147 'trade':203 'unit':134 'upon':243 'usdc':92,137 'use':91 'vantag':3,19,38,182 'via':7,23,87 'without':79 'workflow':68 'workload':246 'x':117 'x-payment':116 'x402':10,26,45,89,123 'x402 stock API' 'x402-payable':9,25,44 'x402-payment'","prices":[{"id":"7972347c-54af-4c85-a8ab-87978bece20b","listingId":"046c4b9f-2044-41f5-b12f-8b0b3ca734d3","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"100000","chain":"base-sepolia","payTo":"0x407f86ab87AcCbe739aE15b08093D079059525b1","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x407f86ab87AcCbe739aE15b08093D079059525b1","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963","description":"The official Alpha Vantage API MCP server enables LLMs and agentic workflows to seamlessly interact with real-time and historical stock market data. | Powered by Questflow","outputSchema":{"input":{"type":"http","method":"POST","bodyFields":{"input":{"type":"string","required":true,"description":"Your message to the agent"}},"discoverable":true},"output":{"response":{"type":"string","required":true,"description":"Response from the agent"}}},"maxAmountRequired":"100000","maxTimeoutSeconds":1200}],"asset_contract":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","max_timeout_seconds":1200},"createdAt":"2026-04-18T06:06:22.930Z"}],"sources":[{"listingId":"046c4b9f-2044-41f5-b12f-8b0b3ca734d3","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T06:06:22.930Z","lastSeenAt":"2026-04-22T02:30:07.548Z"}],"details":{"listingId":"046c4b9f-2044-41f5-b12f-8b0b3ca734d3","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{\"input\": \"What is the current price of AAPL?\"}'","exampleRequest":{"input":"What is the current price of AAPL?"},"exampleResponse":{"response":"The current price of AAPL (Apple Inc.) is $198.50 as of the latest trading session."},"schema":{"input":{"type":"http","method":"POST","bodyFields":{"input":{"type":"string","required":true,"description":"Your message to the agent"}},"discoverable":true},"output":{"response":{"type":"string","required":true,"description":"Response from the agent"}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge requires USDC payment on Base Sepolia with maxAmountRequired of 100000 and maxTimeoutSeconds of 1200","source_url":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963"},{"claim":"The agent accepts a POST with an 'input' string field and returns a 'response' string field","source_url":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963"},{"claim":"Description states it enables LLMs and agentic workflows to interact with real-time and historical stock market data","source_url":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68dba0e582f61ca4a1686963"},{"claim":"Questflow is marketed as an AI Clone platform aggregating onchain markets","source_url":"https://api-dev.intra-tls2.dctx.link"}],"useCases":["Querying real-time stock quotes via natural language from an AI agent","Retrieving historical stock price data within an agentic workflow","Integrating stock market lookups into LLM tool-use pipelines with x402 micropayments"],"bestFor":["Developers experimenting with x402 payment-gated agent APIs on testnet","AI agent builders needing stock market data as a tool","Prototyping agentic financial research workflows"],"notFor":["Production financial applications requiring guaranteed uptime and mainnet settlement","Users needing direct, structured Alpha Vantage API access with full endpoint control","Low-latency trading systems (max timeout is 1200 seconds)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:52.065Z"},"updatedAt":"2026-04-22T02:30:07.548Z"}}