{"id":"849014df-44bf-4902-bd62-0b04a36edb8e","shortId":"UN5vs8","kind":"x402","title":"Pay-per-query AI research agent accessible via x402 micropayments on Base Sepolia.","tagline":"Pay-per-query AI research agent accessible via x402 micropayments on Base Sepolia.","description":"Researcher is an x402-enabled AI agent endpoint hosted on the Questflow platform. It accepts a text prompt and returns a research-oriented response from the agent. The endpoint is gated behind an x402 payment challenge, requiring USDC payment on the Base Sepolia testnet (asset contract 0x036CbD53842c5426634e7929541eC2318f3dCF7e) with a maximum cost of 500,000 units (0.50 USDC assuming 6 decimals) per request.\n\nThe interaction model is simple: send an HTTP POST with a JSON body containing an \"input\" string field (your message/query to the agent), and receive a JSON response with a \"response\" string field. The endpoint supports a maximum timeout of 1200 seconds (20 minutes), suggesting it may perform non-trivial research or multi-step reasoning before returning results. The x402 payment header must accompany each request using the \"exact\" payment scheme.\n\nNote that this endpoint is currently on a development/testnet infrastructure (api-dev subdomain, Base Sepolia network), so it is likely not production-ready. No OpenAPI spec, detailed documentation, or usage examples beyond the x402 challenge metadata were found. The underlying capabilities of the \"Researcher\" agent — such as what sources it consults, what domains it covers, or what quality guarantees it provides — are not documented in the available material.","tags":[],"capabilities":["x402-payment-gated","ai-research-agent","text-in-text-out","base-sepolia-usdc","questflow-swarm"],"categories":["llm","research"],"synonyms":["AI researcher","research assistant","Questflow researcher","x402 research agent","pay-per-query research","micropayment AI agent"],"warnings":["Endpoint is on a development subdomain (api-dev) and uses Base Sepolia testnet — not production-ready.","No OpenAPI specification or detailed documentation found.","Agent capabilities (sources, domains, accuracy) are completely undocumented.","Example response is fabricated for illustration; actual output format may differ.","USDC amount interpretation (0.50 USDC) assumes 6 decimal places — verify with the asset contract."],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0xeb0F33317a183006C242BD0BA48fD46843854cc8","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb","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":"0.300","qualityRationale":"Only the x402 challenge metadata is available — no OpenAPI spec, no documentation pages, no usage examples, and no crawl content. The endpoint is on a dev/testnet domain. The agent's actual research capabilities, sources, and quality are entirely 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'non-trivi':141 'note':166 'openapi':192 'orient':53 'pay':2,16 'pay-per-queri':1,15 'pay-per-query research' 'payment':65,69,155,164 'per':3,17,91 'perform':140 'platform':42 'post':101 'product':189 'production-readi':188 'prompt':47 'provid':228 'qualiti':225 'queri':4,18 'questflow':41 'questflow-swarm' 'readi':190 'reason':149 'receiv':117 'request':92,160 'requir':67 'research':6,20,29,52,144,211 'research assistant' 'research-ori':51 'respons':54,120,123 'result':152 'return':49,151 'scheme':165 'second':134 'send':98 'sepolia':14,28,73,181 'simpl':97 'sourc':216 'spec':193 'step':148 'string':109,124 'subdomain':179 'suggest':137 'support':128 'testnet':74 'text':46 'text-in-text-out' 'timeout':131 'trivial':143 'under':207 'unit':85 'usag':197 'usdc':68,87 'use':161 'via':9,23 'x402':10,24,33,64,154,201 'x402 research agent' 'x402-enabled':32 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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":"2026-04-18T18:30:27.691Z"}],"sources":[{"listingId":"849014df-44bf-4902-bd62-0b04a36edb8e","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:27.691Z","lastSeenAt":"2026-04-22T02:30:09.171Z"}],"details":{"listingId":"849014df-44bf-4902-bd62-0b04a36edb8e","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{\"input\": \"What are the latest advances in quantum computing?\"}'","exampleRequest":{"input":"What are the latest advances in quantum computing?"},"exampleResponse":{"response":"Recent advances in quantum computing include improvements in error correction codes, the development of logical qubits by several research groups, and progress toward fault-tolerant quantum processors..."},"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":"x402 challenge requires USDC payment on Base Sepolia with maxAmountRequired of 500000 and asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb"},{"claim":"Endpoint description is 'Researcher | Powered by Questflow'","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb"},{"claim":"Maximum timeout is 1200 seconds and payment scheme is 'exact'","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb"},{"claim":"Input schema requires a string 'input' field and output returns a string 'response' field","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb"}],"useCases":["Submitting research questions and receiving AI-generated research responses","Integrating a pay-per-use research agent into autonomous agent workflows","Testing x402 micropayment flows with an AI agent on Base Sepolia testnet"],"bestFor":["Developers experimenting with x402 payment-gated AI agents","Autonomous agents needing on-demand research capabilities via micropayments","Testing x402 protocol integrations on Base Sepolia"],"notFor":["Production workloads requiring guaranteed uptime and SLAs (this is a dev/testnet endpoint)","Users needing detailed provenance or citations for research outputs (no documentation on sources)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:36.091Z"},"updatedAt":"2026-04-22T02:30:09.171Z"}}