x402-payable AI researcher agent on Base Sepolia, powered by Questflow's swarm infrastructure.
What it does
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.
Questflow 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.
Documentation 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.
Capabilities
Use cases
- —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
Fit
Best for
- —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
Not for
- —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)
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{"input": "What are the latest trends in DeFi lending?"}'Example
Request
{
"input": "What are the latest trends in DeFi lending?"
}Response
{
"response": "Recent trends in DeFi lending include the rise of real-world asset (RWA) collateralization, modular lending protocols, and cross-chain liquidity aggregation..."
}Endpoint
Quality
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 applicability.
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
Citations
- —The endpoint returns a 402 challenge with x402Version 1 on POST, accepting USDC on base-sepolia with maxAmountRequired 500000https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7
- —The outputSchema specifies an input string field ('Your message to the agent') and an output response string field ('Response from the agent')https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7
- —Questflow is a platform for autonomous AI agents ('Clones') that aggregate onchain markets including Polymarket, Pump.fun, OKX, and Opinion Labshttps://api-dev.intra-tls2.dctx.link
- —Payment address is 0x18ED3138b17f4503D2623825625F2776e3f7d0c6 and asset is 0x036CbD53842c5426634e7929541eC2318f3dCF7e (USDC v2)https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1de4040f924c075ec76f7