{"id":"265fd595-bafd-405a-a505-f929436b7a75","shortId":"gqAyjG","kind":"x402","title":"Pay-per-query Exa search agent via x402 on Base Sepolia, powered by Questflow.","tagline":"Pay-per-query Exa search agent via x402 on Base Sepolia, powered by Questflow.","description":"This endpoint exposes an Exa search agent behind an x402 paywall hosted by Questflow. Callers send a POST request with a JSON body containing an `input` string (your search query or message to the agent) and receive a text `response` from the agent. Payment is handled via the x402 protocol using USDC on the Base Sepolia testnet.\n\nThe x402 challenge confirms the endpoint is live and accepts the \"exact\" payment scheme. The maximum amount required per call is 100,000 units of the USDC asset (contract `0x036CbD53842c5426634e7929541eC2318f3dCF7e`) on Base Sepolia, with a timeout of up to 1,200 seconds. The payment recipient address is `0x836534FBf04785FC6e4859E0279706436895c717`.\n\nQuestflow is a platform for creating autonomous AI agents (\"Clones\") that aggregate multiple onchain and offchain data sources. This particular agent wraps Exa's search capabilities, though no further documentation on the agent's behavior, search parameters, or result formatting is available beyond the outputSchema in the x402 challenge. Because this runs on a testnet (Base Sepolia), it is likely intended for development and experimentation rather than production use.","tags":[],"capabilities":["exa-search","x402-payment","base-sepolia","usdc-payment","agent-query","text-response","questflow-agent"],"categories":["search","crypto"],"synonyms":["exa search api","web search agent","questflow exa","x402 search","pay-per-search","ai search agent","exa web search","onchain search"],"warnings":["Runs on Base Sepolia testnet — not suitable for production use","No dedicated API documentation or OpenAPI spec available","Agent behavior and Exa search parameters are undocumented beyond a single 'input' string field","Example response is inferred from the outputSchema, not observed"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x836534FBf04785FC6e4859E0279706436895c717","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288","description":"exa search | 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":"0.400","qualityRationale":"The endpoint is live (402 challenge confirmed) with a clear outputSchema specifying input/output fields, but there is no OpenAPI spec, no dedicated documentation, no usage examples, and no details about what Exa search features are exposed. The testnet-only payment and sparse metadata limit 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'0x036cbd53842c5426634e7929541ec2318f3dcf7e':117 '0x836534fbf04785fc6e4859e0279706436895c717':135 '1':127 '100':109 '200':128 'accept':97 'address':133 'agent':7,22,37,65,73,144,156,168 'agent-query' 'aggreg':147 'ai':143 'ai search agent' 'amount':104 'asset':115 'autonom':142 'avail':177 'base':11,26,85,119,191 'base-sepolia' 'behavior':170 'behind':38 'beyond':178 'bodi':53 'call':107 'caller':45 'capabl':161 'challeng':90,184 'clone':145 'confirm':91 'contain':54 'contract':116 'creat':141 'data':152 'develop':198 'document':165 'endpoint':32,93 'exa':5,20,35,158 'exa search api' 'exa web search' 'exa-search' 'exact':99 'experiment':200 'expos':33 'format':175 'handl':76 'host':42 'input':56 'intend':196 'json':52 'like':195 'live':95 'maximum':103 'messag':62 'multipl':148 'offchain':151 'onchain':149 'onchain search' 'outputschema':180 'paramet':172 'particular':155 'pay':2,17 'pay-per-queri':1,16 'pay-per-search' 'payment':74,100,131 'paywal':41 'per':3,18,106 'platform':139 'post':48 'power':13,28 'product':203 'protocol':80 'queri':4,19,60 'questflow':15,30,44,136 'questflow exa' 'questflow-agent' 'rather':201 'receiv':67 'recipi':132 'request':49 'requir':105 'respons':70 'result':174 'run':187 'scheme':101 'search':6,21,36,59,160,171 'second':129 'send':46 'sepolia':12,27,86,120,192 'sourc':153 'string':57 'testnet':87,190 'text':69 'text-response' 'though':162 'timeout':123 'unit':111 'usdc':82,114 'usdc-payment' 'use':81,204 'via':8,23,77 'web search agent' 'wrap':157 'x402':9,24,40,79,89,183 'x402 search' 'x402-payment'","prices":[{"id":"595a5c56-b6ab-446a-add0-75971d0b3038","listingId":"265fd595-bafd-405a-a505-f929436b7a75","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"100000","chain":"base-sepolia","payTo":"0x836534FBf04785FC6e4859E0279706436895c717","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x836534FBf04785FC6e4859E0279706436895c717","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288","description":"exa search | 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":"2026-04-18T18:31:23.968Z"}],"sources":[{"listingId":"265fd595-bafd-405a-a505-f929436b7a75","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:23.968Z","lastSeenAt":"2026-04-22T02:30:11.595Z"}],"details":{"listingId":"265fd595-bafd-405a-a505-f929436b7a75","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{\"input\": \"latest news on Ethereum upgrades\"}'","exampleRequest":{"input":"latest news on Ethereum upgrades"},"exampleResponse":{"response":"Here are the latest results regarding Ethereum upgrades: ..."},"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 returns status 402 with USDC on Base Sepolia, maxAmountRequired 100000, and payTo 0x836534FBf04785FC6e4859E0279706436895c717","source_url":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288"},{"claim":"The outputSchema specifies a POST method with a required 'input' string field and a 'response' string output","source_url":"https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288"},{"claim":"Questflow is a platform for creating autonomous AI agents that aggregate onchain markets","source_url":"https://api-dev.intra-tls2.dctx.link"}],"useCases":["Querying web search results through an AI agent with per-request crypto micropayments","Integrating Exa-powered search into autonomous agent workflows that settle on Base Sepolia","Prototyping x402-based search services in a testnet environment"],"bestFor":["Developers experimenting with x402 payment-gated search","Agent-to-agent search queries settled with USDC on Base Sepolia","Prototyping pay-per-call AI search integrations"],"notFor":["Production search workloads requiring mainnet settlement","Users who need detailed search parameters like filters, date ranges, or pagination","Free or unauthenticated search access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:10.264Z"},"updatedAt":"2026-04-22T02:30:11.595Z"}}