{"id":"4ae5c4aa-116a-4359-9488-114c2360ed3f","shortId":"rf44t6","kind":"x402","title":"Chat-based Web3 trading agent powered by Questflow, payable via x402 on Base Sepolia","tagline":"Chat-based Web3 trading agent powered by Questflow, payable via x402 on Base Sepolia","description":"Web3 Trader is an x402-enabled AI agent endpoint hosted by Questflow. It accepts a text message via POST and returns a response from an autonomous Web3 trading agent. The endpoint uses the x402 payment protocol on the Base Sepolia testnet, requiring USDC payment (up to 0.50 USDC per request, using the 6-decimal USDC contract at 0x036CbD53842c5426634e7929541eC2318f3dCF7e) before the agent processes your query.\n\nQuestflow's platform aggregates multiple onchain markets — including Polymarket, Pump.fun, Opinion Labs, and OKX — and provides AI \"clones\" that scan for trading opportunities, execute trades, and generate signals. This particular endpoint exposes a Web3 Trader agent that can be interacted with conversationally. The input schema is simple: a single JSON body field \"input\" (string) containing your message, and the output is a \"response\" (string) from the agent.\n\nNote that this endpoint is on a development API server (api-dev) and uses the Base Sepolia testnet, indicating it is likely a staging or test deployment rather than a production service. No formal API documentation, OpenAPI spec, or detailed usage guides were found beyond the x402 challenge metadata and the Questflow landing page.","tags":[],"capabilities":["x402-payment","web3-trading-agent","chat-interface","base-sepolia-testnet","usdc-payment","onchain-market-aggregation","conversational-ai"],"categories":["crypto","llm","trading"],"synonyms":["Web3 trading bot","crypto trading agent","Questflow agent","onchain trading AI","prediction market agent","x402 trading endpoint","Web3 chat agent"],"warnings":["Endpoint is on a development server (api-dev) using Base Sepolia testnet — not production","No formal API documentation or OpenAPI spec found","Example response is inferred from outputSchema, not from an actual API call","USDC asset address 0x036CbD53842c5426634e7929541eC2318f3dCF7e is the Sepolia testnet token"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x10bE7F668cdaF23A784AC23BD0dD860c33BA0Fbb","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8","description":"Web3 Trader | 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":"500000","maxTimeoutSeconds":1200}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live (402 challenge confirmed) with a clear input/output schema from the x402 challenge metadata. However, there is no OpenAPI spec, no dedicated API documentation, no usage examples, and the endpoint is on a dev/testnet deployment. The response format is inferred from the outputSchema in the challenge, not from an actual successful 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'0x036cbd53842c5426634e7929541ec2318f3dcf7e':89 '6':84 'Questflow agent' 'Web3 chat agent' 'Web3 trading bot' 'accept':45 'agent':6,21,39,60,92,131,162 'aggreg':99 'ai':38,112 'api':171,174,198 'api-dev':173 'autonom':57 'base':3,14,18,29,70,179 'base-sepolia-testnet' 'beyond':208 'bodi':146 'challeng':211 'chat':2,17 'chat-bas':1,16 'chat-interface' 'clone':113 'contain':150 'contract':87 'convers':137 'conversational-ai' 'crypto trading agent' 'decim':85 'deploy':190 'detail':203 'dev':175 'develop':170 'document':199 'enabl':37 'endpoint':40,62,126,166 'execut':119 'expos':127 'field':147 'formal':197 'found':207 'generat':122 'guid':205 'host':41 'includ':103 'indic':182 'input':139,148 'interact':135 'json':145 'lab':107 'land':216 'like':185 'market':102 'messag':48,152 'metadata':212 'multipl':100 'note':163 'okx':109 'onchain':101 'onchain trading AI' 'onchain-market-aggregation' 'openapi':200 'opinion':106 'opportun':118 'output':155 'page':217 'particular':125 'payabl':10,25 'payment':66,75 'per':80 'platform':98 'polymarket':104 'post':50 'power':7,22 'prediction market agent' 'process':93 'product':194 'protocol':67 'provid':111 'pump.fun':105 'queri':95 'questflow':9,24,43,96,215 'rather':191 'request':81 'requir':73 'respons':54,158 'return':52 'scan':115 'schema':140 'sepolia':15,30,71,180 'server':172 'servic':195 'signal':123 'simpl':142 'singl':144 'spec':201 'stage':187 'string':149,159 'test':189 'testnet':72,181 'text':47 'trade':5,20,59,117,120 'trader':32,130 'usag':204 'usdc':74,79,86 'usdc-payment' 'use':63,82,177 'via':11,26,49 'web3':4,19,31,58,129 'web3-trading-agent' 'x402':12,27,36,65,210 'x402 trading endpoint' 'x402-enabled':35 'x402-payment'","prices":[{"id":"1b65a523-2497-444f-9fe2-e0cf5d05a4ef","listingId":"4ae5c4aa-116a-4359-9488-114c2360ed3f","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"500000","chain":"base-sepolia","payTo":"0x10bE7F668cdaF23A784AC23BD0dD860c33BA0Fbb","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x10bE7F668cdaF23A784AC23BD0dD860c33BA0Fbb","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8","description":"Web3 Trader | 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":"500000","maxTimeoutSeconds":1200}],"asset_contract":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","max_timeout_seconds":1200},"createdAt":"2026-04-18T18:30:45.441Z"}],"sources":[{"listingId":"4ae5c4aa-116a-4359-9488-114c2360ed3f","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:45.441Z","lastSeenAt":"2026-04-22T02:30:09.961Z"}],"details":{"listingId":"4ae5c4aa-116a-4359-9488-114c2360ed3f","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{\"input\": \"What are the top trending prediction markets right now?\"}'","exampleRequest":{"input":"What are the top trending prediction markets right now?"},"exampleResponse":{"response":"Here are the top trending prediction markets across Polymarket and Opinion Labs: ..."},"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 payment on base-sepolia network with USDC asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e, maxAmountRequired 500000","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8"},{"claim":"Questflow aggregates Polymarket, Pump.fun, Opinion Labs, OKX and other onchain markets","source_url":"https://api-dev.intra-tls2.dctx.link"},{"claim":"The endpoint description from the x402 challenge is 'Web3 Trader | Powered by Questflow'","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8"},{"claim":"The input schema accepts a POST with a JSON body field 'input' (string) and returns a 'response' (string)","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8"}],"useCases":["Querying an AI agent for Web3 trading insights or market analysis","Programmatically interacting with an autonomous crypto trading assistant","Integrating a pay-per-use Web3 trading agent into an agent-to-agent workflow","Testing x402 payment flows with a conversational trading agent on Base Sepolia"],"bestFor":["Developers experimenting with x402 payment protocol and AI agents","Agent-to-agent systems needing a Web3-aware conversational trading endpoint","Prototyping pay-per-query crypto market intelligence pipelines"],"notFor":["Production trading with real funds (this uses Base Sepolia testnet)","Users needing detailed API documentation or guaranteed SLAs","Non-crypto use cases with no Web3 relevance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:23.922Z"},"updatedAt":"2026-04-22T02:30:09.961Z"}}