Pay-per-use AI research agent accessible via x402 micropayments on Base Sepolia
What it does
Researcher is an x402-enabled AI agent endpoint hosted on Questflow's infrastructure. It accepts a text prompt via HTTP POST and returns a text response from the agent. Payment is handled through the x402 protocol using USDC on the Base Sepolia testnet, with a maximum cost of 0.5 USDC per request and a timeout of up to 1200 seconds (20 minutes).
The endpoint is part of Questflow's "swarm" system, which appears to be a collection of AI agents that can be invoked programmatically. Questflow's broader platform focuses on autonomous AI clones for onchain market scanning, trading, and research across platforms like Polymarket, Pump.fun, OKX, and Opinion Labs. The specific capabilities of this "Researcher" agent are not documented beyond its name and the generic input/output schema — it accepts a string message and returns a string response.
No OpenAPI spec, detailed documentation, or usage examples are available from the provider. The endpoint is currently on a development/testnet domain (api-dev, base-sepolia), suggesting it may not yet be production-ready. Prospective users should treat this as an experimental endpoint.
Capabilities
Use cases
- —Sending research queries to an AI agent and receiving text-based answers
- —Integrating a pay-per-use research agent into automated workflows
- —Testing x402 micropayment flows with an AI agent on Base Sepolia testnet
Fit
Best for
- —Developers experimenting with x402 payment protocol for AI agents
- —Automated pipelines needing an on-demand research agent behind a paywall
- —Exploring Questflow's swarm agent ecosystem
Not for
- —Production workloads requiring guaranteed uptime (this is a dev/testnet endpoint)
- —Users needing detailed, documented API contracts or OpenAPI specs
- —Free or high-volume research queries without per-request payment
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf9a9a89cedc55909218 \
-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 documentation pages, no usage examples, and the endpoint is on a dev/testnet domain. The only concrete information comes from the x402 challenge payload, which provides a minimal input/output schema. The agent's actual research capabilities are entirely unspecified.
Warnings
- —Endpoint is on a development domain (api-dev) and uses Base Sepolia testnet — not production-ready
- —No API documentation, OpenAPI spec, or detailed capability description available
- —The 'Researcher' agent's specific capabilities and knowledge scope are undocumented
- —Response example is inferred/fabricated from the schema; actual output format may differ
- —Maximum timeout of 1200 seconds suggests potentially long-running requests
Citations
- —Payment uses USDC on Base Sepolia with maxAmountRequired of 500000 (0.5 USDC) and maxTimeoutSeconds of 1200https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf9a9a89cedc55909218
- —The endpoint accepts a POST with a string 'input' field and returns a string 'response' fieldhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf9a9a89cedc55909218
- —Questflow's platform aggregates markets including Polymarket, Pump.fun, OKX, and Opinion Labshttps://api-dev.intra-tls2.dctx.link
- —The endpoint description states 'Researcher | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf9a9a89cedc55909218