{"id":"f318ba38-5c73-48ff-bfdd-827d8e001103","shortId":"uqPkVB","kind":"x402","title":"AI-powered Web3 trading agent accessible via x402 micropayment on Base Sepolia","tagline":"AI-powered Web3 trading agent accessible via x402 micropayment 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 is gated by an x402 payment challenge requiring USDC on the Base Sepolia testnet, with a maximum cost of 0.5 USDC per request (500000 in token units) and a timeout of up to 1200 seconds.\n\nThe underlying platform, Questflow, aggregates multiple onchain markets including Polymarket, Pump.fun, Opinion Labs, and OKX. The agent is designed to scan markets, detect patterns and sentiment shifts, and provide trading-related insights. Based on the output schema, the endpoint accepts a single string field (\"input\") as your message to the agent and returns a single string field (\"response\") with the agent's reply.\n\nDocumentation is minimal — there is no OpenAPI spec, no dedicated docs page, and no detailed API reference beyond the x402 challenge payload and the Questflow landing page. The endpoint is live and responds with a proper 402 challenge. Note that this operates on Base Sepolia (a testnet), so it is likely a development or preview deployment rather than a production service.","tags":[],"capabilities":["x402-payment-gated","web3-trading-agent","text-in-text-out","base-sepolia-usdc","autonomous-market-scanning","onchain-market-aggregation"],"categories":["crypto","llm","trading"],"synonyms":["Web3 trading bot","crypto AI agent","Questflow agent","onchain trading assistant","prediction market agent","DeFi trading agent","x402 trading endpoint"],"warnings":["Runs on Base Sepolia testnet — not a mainnet production endpoint","No OpenAPI spec or dedicated API documentation available","Response example is inferred from the outputSchema, not from an actual API call","The 1200-second max timeout suggests potentially long-running agent processing"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x08798BE66cb940e5D763A56eE4B79C31F190C682","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9","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 with a valid 402 challenge and includes an outputSchema describing input/output fields. However, there is no OpenAPI spec, no dedicated documentation, no usage examples, and the endpoint runs on a testnet (Base Sepolia). The response example is inferred since no actual response was 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'1200':92 '402':194 '500000':82 'DeFi trading agent' 'Questflow agent' 'Web3 trading bot' 'accept':41,134 'access':7,20 'agent':6,19,35,56,110,145,155 'aggreg':98 'ai':2,15,34 'ai-pow':1,14 'api':173 'autonom':53 'autonomous-market-scanning' 'base':12,25,70,127,201 'base-sepolia-usdc' 'beyond':175 'challeng':65,178,195 'cost':76 'crypto AI agent' 'dedic':167 'deploy':213 'design':112 'detail':172 'detect':116 'develop':210 'doc':168 'document':158 'enabl':33 'endpoint':36,58,133,186 'field':138,151 'gate':60 'host':37 'includ':102 'input':139 'insight':126 'lab':106 'land':183 'like':208 'live':188 'market':101,115 'maximum':75 'messag':44,142 'micropay':10,23 'minim':160 'multipl':99 'note':196 'okx':108 'onchain':100 'onchain trading assistant' 'onchain-market-aggregation' 'openapi':164 'oper':199 'opinion':105 'output':130 'page':169,184 'pattern':117 'payload':179 'payment':64 'per':80 'platform':96 'polymarket':103 'post':46 'power':3,16 'prediction market agent' 'preview':212 'product':217 'proper':193 'provid':122 'pump.fun':104 'questflow':39,97,182 'rather':214 'refer':174 'relat':125 'repli':157 'request':81 'requir':66 'respond':190 'respons':50,152 'return':48,147 'scan':114 'schema':131 'second':93 'sentiment':119 'sepolia':13,26,71,202 'servic':218 'shift':120 'singl':136,149 'spec':165 'string':137,150 'testnet':72,204 'text':43 'text-in-text-out' 'timeout':88 'token':84 'trade':5,18,55,124 'trader':28 'trading-rel':123 'under':95 'unit':85 'usdc':67,79 'via':8,21,45 'web3':4,17,27,54 'web3-trading-agent' 'x402':9,22,32,63,177 'x402 trading endpoint' 'x402-enabled':31 'x402-payment-gated'","prices":[{"id":"705ec6a3-a0a7-4c66-8633-268fc57e3e4c","listingId":"f318ba38-5c73-48ff-bfdd-827d8e001103","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"500000","chain":"base-sepolia","payTo":"0x08798BE66cb940e5D763A56eE4B79C31F190C682","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x08798BE66cb940e5D763A56eE4B79C31F190C682","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9","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":"2026-04-18T18:30:46.044Z"}],"sources":[{"listingId":"f318ba38-5c73-48ff-bfdd-827d8e001103","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:46.044Z","lastSeenAt":"2026-04-22T02:30:09.995Z"}],"details":{"listingId":"f318ba38-5c73-48ff-bfdd-827d8e001103","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\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":"Currently trending on Polymarket: 'Will the Fed cut rates in July?' at 62% yes. On Pump.fun, $CLONE token is seeing high volume..."},"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 endpoint returns a 402 challenge requiring USDC on base-sepolia with maxAmountRequired of 500000","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9"},{"claim":"The x402 challenge describes the endpoint as 'Web3 Trader | Powered by Questflow'","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9"},{"claim":"Questflow aggregates Polymarket, Pump.fun, Opinion Labs, OKX and other onchain markets","source_url":"https://api-dev.intra-tls2.dctx.link"},{"claim":"The outputSchema specifies a POST method with an 'input' string field and a 'response' string output field","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9"},{"claim":"The USDC asset address is 0x036CbD53842c5426634e7929541eC2318f3dCF7e on base-sepolia","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0cb4d9c162996ee7192c9"}],"useCases":["Querying an AI agent for Web3 market insights and trading signals","Getting autonomous analysis across Polymarket, Pump.fun, OKX, and other onchain markets","Integrating a pay-per-query crypto trading assistant into an agent workflow","Prototyping x402 payment flows with a live AI agent on Base Sepolia"],"bestFor":["Developers experimenting with x402 payment-gated AI agents","Agent-to-agent workflows needing onchain market intelligence","Prototyping micropayment-based crypto advisory services"],"notFor":["Production trading with real funds (this is on Base Sepolia testnet)","Users needing detailed API documentation or guaranteed SLAs","Non-crypto use cases with no need for Web3 market data"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:23.91Z"},"updatedAt":"2026-04-22T02:30:09.995Z"}}