{"id":"d37b2278-a539-4fc7-8def-d107ddbc9901","shortId":"MH8GTD","kind":"x402","title":"x402-payable AI researcher agent on Base Sepolia, powered by Questflow's swarm infrastructure.","tagline":"x402-payable AI researcher agent on Base Sepolia, powered by Questflow's swarm infrastructure.","description":"The Researcher endpoint is an x402-enabled AI agent hosted on Questflow's swarm infrastructure. It accepts a text prompt via HTTP POST and returns a text response from the agent. Payment is handled via the x402 protocol on the Base Sepolia testnet using USDC, with a maximum cost of 0.50 USDC per request and a timeout of up to 1200 seconds.\n\nQuestflow is a platform focused on autonomous AI agents (\"Clones\") that operate across onchain markets such as Polymarket, Pump.fun, OKX, and Opinion Labs. The Researcher agent appears to be one such swarm-based agent exposed via x402 for programmatic, pay-per-call access. The endpoint's outputSchema specifies a simple request/response contract: send a JSON body with an `input` string field and receive a `response` string field.\n\nDocumentation for this specific endpoint is minimal — there is no OpenAPI spec, no dedicated docs page, and no usage examples beyond what the x402 challenge provides. The endpoint is live and returns a valid 402 challenge on POST. Because it runs on Base Sepolia (a testnet), this is likely a development or preview deployment rather than a production service.","tags":[],"capabilities":["ai-agent","text-generation","research-agent","x402-payment","base-sepolia","usdc-payment","swarm-agent"],"categories":["llm","agents"],"synonyms":["Questflow researcher","AI research agent","x402 agent","pay-per-call AI","Questflow swarm","autonomous researcher","AI clone researcher"],"warnings":["No OpenAPI or dedicated documentation available for this endpoint","Running on Base Sepolia testnet — not a production/mainnet deployment","Endpoint description is extremely minimal ('Researcher'); actual agent capabilities are unclear","Maximum timeout of 1200 seconds suggests potentially long-running requests","Example response is inferred from the outputSchema, not from an actual call"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x18ED3138b17f4503D2623825625F2776e3f7d0c6","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7","description":"Researcher | 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 and returns a valid x402 challenge with a clear outputSchema, but there is no OpenAPI spec, no dedicated documentation, no usage examples, and the description is just 'Researcher'. Running on Base Sepolia testnet further limits production 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'1200':92 '402':197 'AI clone researcher' 'AI research agent' 'Questflow researcher' 'Questflow swarm' 'accept':48 'access':138 'across':106 'agent':6,21,40,62,102,119,128 'ai':4,19,39,101 'ai-agent' 'appear':120 'autonom':100 'autonomous researcher' 'base':8,23,72,127,205 'base-sepolia' 'beyond':183 'bodi':151 'call':137 'challeng':187,198 'clone':103 'contract':147 'cost':80 'dedic':176 'deploy':216 'develop':213 'doc':177 'document':163 'enabl':38 'endpoint':33,140,167,190 'exampl':182 'expos':129 'field':156,162 'focus':98 'handl':65 'host':41 'http':53 'infrastructur':15,30,46 'input':154 'json':150 'lab':116 'like':211 'live':192 'market':108 'maximum':79 'minim':169 'okx':113 'onchain':107 'one':123 'openapi':173 'oper':105 'opinion':115 'outputschema':142 'page':178 'pay':135 'pay-per-cal':134 'pay-per-call AI' 'payabl':3,18 'payment':63 'per':84,136 'platform':97 'polymarket':111 'post':54,200 'power':10,25 'preview':215 'product':220 'programmat':133 'prompt':51 'protocol':69 'provid':188 'pump.fun':112 'questflow':12,27,43,94 'rather':217 'receiv':158 'request':85 'request/response':146 'research':5,20,32,118 'research-agent' 'respons':59,160 'return':56,194 'run':203 'second':93 'send':148 'sepolia':9,24,73,206 'servic':221 'simpl':145 'spec':174 'specif':166 'specifi':143 'string':155,161 'swarm':14,29,45,126 'swarm-agent' 'swarm-bas':125 'testnet':74,208 'text':50,58 'text-generation' 'timeout':88 'usag':181 'usdc':76,83 'usdc-payment' 'use':75 'valid':196 'via':52,66,130 'x402':2,17,37,68,131,186 'x402 agent' 'x402-enabled':36 'x402-payable':1,16 'x402-payment'","prices":[{"id":"0232202b-e5a3-495a-9131-30eb32d16264","listingId":"d37b2278-a539-4fc7-8def-d107ddbc9901","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"500000","chain":"base-sepolia","payTo":"0x18ED3138b17f4503D2623825625F2776e3f7d0c6","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x18ED3138b17f4503D2623825625F2776e3f7d0c6","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7","description":"Researcher | 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":"2026-04-18T18:31:05.245Z"}],"sources":[{"listingId":"d37b2278-a539-4fc7-8def-d107ddbc9901","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:05.245Z","lastSeenAt":"2026-04-22T02:30:10.790Z"}],"details":{"listingId":"d37b2278-a539-4fc7-8def-d107ddbc9901","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{\"input\": \"What are the latest trends in DeFi lending?\"}'","exampleRequest":{"input":"What are the latest trends in DeFi lending?"},"exampleResponse":{"response":"Recent trends in DeFi lending include the rise of real-world asset (RWA) collateralization, modular lending protocols, and cross-chain liquidity aggregation..."},"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 with x402Version 1 on POST, accepting USDC on base-sepolia with maxAmountRequired 500000","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7"},{"claim":"The outputSchema specifies an input string field ('Your message to the agent') and an output response string field ('Response from the agent')","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7"},{"claim":"Questflow is a platform for autonomous AI agents ('Clones') that aggregate onchain markets including Polymarket, Pump.fun, OKX, and Opinion Labs","source_url":"https://api-dev.intra-tls2.dctx.link"},{"claim":"Payment address is 0x18ED3138b17f4503D2623825625F2776e3f7d0c6 and asset is 0x036CbD53842c5426634e7929541eC2318f3dCF7e (USDC v2)","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7"}],"useCases":["Sending research questions to an autonomous AI agent and receiving text answers","Integrating a pay-per-call AI researcher into an agent-to-agent workflow","Prototyping x402 payment flows with a live AI endpoint on Base Sepolia"],"bestFor":["Developers experimenting with x402 payment protocol integrations","Agent-to-agent workflows that need an on-demand research capability","Testing pay-per-call AI interactions on a testnet before production deployment"],"notFor":["Production workloads requiring mainnet settlement and SLAs","Users needing structured or typed output beyond plain text responses","Bulk or high-throughput research tasks (1200s max timeout per request)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:15.539Z"},"updatedAt":"2026-04-22T02:30:10.790Z"}}