Pay-per-query AI research agent accessible via x402 micropayments on Base Sepolia.
What it does
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.
The 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.
Note 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.
Capabilities
Use cases
- —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
Fit
Best for
- —Developers experimenting with x402 payment-gated AI agents
- —Autonomous agents needing on-demand research capabilities via micropayments
- —Testing x402 protocol integrations on Base Sepolia
Not for
- —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)
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{"input": "What are the latest advances in quantum computing?"}'Example
Request
{
"input": "What are the latest advances in quantum computing?"
}Response
{
"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..."
}Endpoint
Quality
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 undocumented.
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.
Citations
- —x402 challenge requires USDC payment on Base Sepolia with maxAmountRequired of 500000 and asset 0x036CbD53842c5426634e7929541eC2318f3dCF7ehttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb
- —Endpoint description is 'Researcher | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb
- —Maximum timeout is 1200 seconds and payment scheme is 'exact'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb
- —Input schema requires a string 'input' field and output returns a string 'response' fieldhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f205c640f924c075ec7efb