x402-payable AI research agent by Questflow — send a prompt, get a researched response.
What it does
The Researcher endpoint is an x402-enabled AI agent hosted on Questflow's 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 for creating autonomous AI "Clones" that aggregate onchain markets (Polymarket, Pump.fun, OKX, Opinion Labs) for trading, research, and signal generation. The Researcher agent appears to be one such clone exposed as a pay-per-call endpoint. The input/output schema is minimal: you POST a JSON body with an "input" string field and receive a JSON response with a "response" string field.
Documentation is extremely sparse — there is no OpenAPI spec, no dedicated docs page, and no usage examples beyond what the x402 challenge payload provides. The endpoint is on a dev/testnet domain (api-dev, base-sepolia), suggesting this is not yet a production service. Prospective users should treat this as experimental.
Capabilities
Use cases
- —Sending research questions to an AI agent and receiving text answers via a single API call
- —Integrating a pay-per-call research agent into an autonomous agent pipeline using x402
- —Prototyping x402 payment flows with a testnet USDC-gated endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —Agent-to-agent workflows that need a research sub-agent callable via HTTP
- —Exploring Questflow's AI clone ecosystem programmatically
Not for
- —Production workloads requiring guaranteed uptime (this is a dev/testnet endpoint)
- —Users who need detailed, documented API contracts or OpenAPI specs
- —Free-tier or non-crypto payment workflows
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee15b82c00f5ed07016fef \
-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, cross-chain lending protocols, and dynamic interest rate models..."
}Endpoint
Quality
No OpenAPI spec, no docs, no usage examples, and the endpoint runs on a testnet (base-sepolia) dev domain. The only concrete technical information comes from the x402 challenge payload, which provides a minimal input/output schema. The example response is entirely inferred.
Warnings
- —Endpoint is on a dev domain (api-dev) and uses Base Sepolia testnet — not production-ready
- —No OpenAPI spec or documentation available; /docs returns 404
- —Output schema and agent behavior are undocumented beyond a single 'response' string field
- —Maximum timeout of 1200 seconds (20 minutes) suggests potentially very long response times
- —Example response JSON is inferred, not sourced from actual API output
Citations
- —Payment uses USDC on base-sepolia with maxAmountRequired of 500000 (0.50 USDC) and maxTimeoutSeconds of 1200https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee15b82c00f5ed07016fef
- —Input schema requires a string 'input' field; output returns a string 'response' fieldhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee15b82c00f5ed07016fef
- —Questflow is a platform for AI Clones that aggregate onchain markets including Polymarket, Pump.fun, OKX, and Opinion Labshttps://api-dev.intra-tls2.dctx.link
- —Description from x402 challenge is 'Researcher | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee15b82c00f5ed07016fef