{"id":"3253bfb5-1097-41be-b570-28c89a3fb8fc","shortId":"Uwyuw4","kind":"x402","title":"Pay-per-call Web3 trading agent via x402 on Base Sepolia, powered by Questflow","tagline":"Pay-per-call Web3 trading agent via x402 on Base Sepolia, powered by Questflow","description":"Web3 Trader is an x402-payable AI agent endpoint hosted by Questflow. It accepts a text prompt and returns a response from a Web3 trading-focused agent. The endpoint uses the x402 payment protocol on the Base Sepolia testnet, accepting USDC payments (asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e) with a maximum cost of 0.5 USDC per request 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 crypto and prediction markets, detect patterns, and provide trading-related responses. The endpoint accepts a simple POST body with an \"input\" string field and returns a \"response\" string field.\n\nDocumentation is minimal — there is no OpenAPI spec, no dedicated docs page, and no detailed API reference beyond the x402 challenge metadata. The endpoint is currently on a testnet (Base Sepolia), suggesting it is in a development or preview stage rather than production-ready. Callers should treat this as experimental.","tags":[],"capabilities":["x402-payment","web3-trading-agent","text-in-text-out","base-sepolia-usdc","onchain-market-aggregation","prediction-market-analysis","autonomous-agent"],"categories":["crypto","llm","trading"],"synonyms":["Web3 trading bot","crypto AI agent","Questflow agent","prediction market agent","onchain trading assistant","x402 crypto endpoint","DeFi agent API"],"warnings":["Endpoint is on Base Sepolia testnet — not production","No OpenAPI spec or API documentation available","Response example is entirely inferred; actual output format is unknown","maxAmountRequired of 500000 likely represents 0.5 USDC (6 decimals) but is not explicitly documented","1200-second timeout suggests potentially slow agent processing"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x0d97bC1b743edD53aa1491155baD8011f46BBBD3","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45","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":"0.300","qualityRationale":"No OpenAPI spec, no docs endpoint, no usage examples, and the endpoint runs on a testnet (Base Sepolia). The only structured information comes from the x402 challenge metadata, which provides basic input/output schema and payment details. Significant inference was required for the response example and 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'0x036cbd53842c5426634e7929541ec2318f3dcf7e':76 '1200':92 'DeFi agent API' 'Questflow agent' 'Web3 trading bot' 'accept':45,72,129 'agent':7,22,39,59,110 'aggreg':98 'ai':38 'api':160 'asset':75 'autonomous-agent' 'base':11,26,69,174 'base-sepolia-usdc' 'beyond':162 'bodi':133 'call':4,19 'caller':190 'challeng':165 'cost':80 'crypto':115 'crypto AI agent' 'current':170 'dedic':154 'design':112 'detail':159 'detect':119 'develop':181 'doc':155 'document':145 'endpoint':40,61,128,168 'experiment':195 'field':138,144 'focus':58 'host':41 'includ':102 'input':136 'lab':106 'market':101,118 'maximum':79 'metadata':166 'minim':147 'multipl':99 'okx':108 'onchain':100 'onchain trading assistant' 'onchain-market-aggregation' 'openapi':151 'opinion':105 'page':156 'pattern':120 'pay':2,17 'pay-per-cal':1,16 'payabl':37 'payment':65,74 'per':3,18,84 'platform':96 'polymarket':103 'post':132 'power':13,28 'predict':117 'prediction market agent' 'prediction-market-analysis' 'preview':183 'product':188 'production-readi':187 'prompt':48 'protocol':66 'provid':122 'pump.fun':104 'questflow':15,30,43,97 'rather':185 'readi':189 'refer':161 'relat':125 'request':85 'respons':52,126,142 'return':50,140 'scan':114 'second':93 'sepolia':12,27,70,175 'simpl':131 'spec':152 'stage':184 'string':137,143 'suggest':176 'testnet':71,173 'text':47 'text-in-text-out' 'timeout':88 'trade':6,21,57,124 'trader':32 'trading-focus':56 'trading-rel':123 'treat':192 'under':95 'usdc':73,83 'use':62 'via':8,23 'web3':5,20,31,55 'web3-trading-agent' 'x402':9,24,36,64,164 'x402 crypto endpoint' 'x402-payable':35 'x402-payment'","prices":[{"id":"e45ed054-8fc8-41d1-b9aa-771069cb7ca6","listingId":"3253bfb5-1097-41be-b570-28c89a3fb8fc","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"500000","chain":"base-sepolia","payTo":"0x0d97bC1b743edD53aa1491155baD8011f46BBBD3","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x0d97bC1b743edD53aa1491155baD8011f46BBBD3","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45","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":"2026-04-18T18:30:37.442Z"}],"sources":[{"listingId":"3253bfb5-1097-41be-b570-28c89a3fb8fc","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:37.442Z","lastSeenAt":"2026-04-22T02:30:09.601Z"}],"details":{"listingId":"3253bfb5-1097-41be-b570-28c89a3fb8fc","quickStartSnippet":"curl -X POST \\\n  https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45 \\\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: Fed rate decision (June), ETH price above $4K by end of month, and US election winner markets are 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 uses x402 protocol version 1 on base-sepolia with USDC asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e and maxAmountRequired of 500000","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45"},{"claim":"The endpoint accepts a POST with an 'input' string field and returns a 'response' string field","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45"},{"claim":"Questflow aggregates Polymarket, Pump.fun, Opinion Labs, and OKX markets","source_url":"https://api-dev.intra-tls2.dctx.link"},{"claim":"Description from x402 challenge is 'Web3 Trader | Powered by Questflow'","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ef17471d6130e109875d45"}],"useCases":["Querying an AI agent for Web3 trading insights or market analysis","Integrating a pay-per-call crypto trading agent into an automated pipeline","Getting prediction market or meme coin analysis via a simple text prompt","Testing x402 payment flows with a Web3-focused agent on Base Sepolia"],"bestFor":["Developers experimenting with x402 payment protocol and AI agents","Agents or bots that need on-demand Web3 market commentary","Testing pay-per-call crypto analysis in a testnet environment"],"notFor":["Production trading with real funds (currently on testnet)","Users needing detailed structured market data or order execution APIs","Anyone requiring comprehensive API documentation or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:29.626Z"},"updatedAt":"2026-04-22T02:30:09.601Z"}}