x402-payable AI research agent by Questflow — send a message, get a researched response.
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 inline via the x402 protocol using USDC on Base Sepolia (testnet), 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 for programmatic use. The endpoint's outputSchema specifies a simple request/response contract: send a JSON body with an `input` string field and receive a JSON object with a `response` string field.
Documentation beyond the x402 challenge and the Questflow landing page is not available. There is no OpenAPI spec, no dedicated docs page, and no usage examples from the provider. The endpoint is live and returns a proper 402 challenge on unauthenticated POST requests. Because this is on Base Sepolia (a testnet), it is likely intended for development or demonstration purposes rather than production use.
Capabilities
Use cases
- —Sending research questions to an autonomous AI agent and receiving text answers
- —Integrating a pay-per-query AI researcher into an agent workflow via x402
- —Prototyping x402 payment flows with a live testnet endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol on Base Sepolia
- —Agent-to-agent communication where one agent needs research capabilities
- —Quick text-based research queries without managing API keys
Not for
- —Production workloads requiring mainnet payment rails (this uses Base Sepolia testnet)
- —Use cases needing structured or multi-modal output beyond plain text
- —High-throughput, low-latency queries (max timeout is 1200 seconds)
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1f19240f924c075ec7c45 \
-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 lending markets..."
}Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with a clear input/output schema. However, there is no OpenAPI spec, no dedicated documentation, no usage examples, and the endpoint operates on a testnet (Base Sepolia), limiting practical utility. Most details are inferred from the x402 challenge alone.
Warnings
- —No OpenAPI spec or dedicated documentation available
- —Payment uses Base Sepolia testnet USDC — not real money, likely a dev/demo endpoint
- —Agent behavior and research capabilities are undocumented
- —Max timeout of 1200 seconds suggests potentially long response times
- —The 'Researcher' agent's scope and knowledge sources are unspecified
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on base-sepolia with maxAmountRequired 500000https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1f19240f924c075ec7c45
- —Questflow is a platform for autonomous AI agents (Clones) that operate across onchain markets including Polymarket, Pump.fun, OKX, and Opinion Labshttps://api-dev.intra-tls2.dctx.link
- —The endpoint description in the x402 challenge is 'Researcher | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1f19240f924c075ec7c45
- —The outputSchema specifies a POST method with an input string field and a response string fieldhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1f19240f924c075ec7c45