Chat-based Web3 trading agent via x402 micropayments on Base Sepolia
What it does
Web3 Trader is an x402-enabled AI agent endpoint powered by Questflow. It accepts a text message via POST and returns a response from an autonomous Web3 trading agent. The endpoint is pay-per-request using USDC on the Base Sepolia testnet, with a maximum cost of 0.5 USDC per call (500000 in token units) and a timeout of up to 1200 seconds.
The underlying platform, Questflow, aggregates multiple onchain markets including Polymarket, Pump.fun, Opinion Labs, and OKX. The agent is designed to scan crypto and prediction markets, detect patterns, sentiment shifts, and whale movements, and provide trading-related intelligence. Based on the x402 challenge schema, the endpoint accepts a simple JSON body with an "input" string field (your message to the agent) and returns a JSON object with a "response" string field.
Note that this endpoint operates on Base Sepolia (a testnet), so it is likely in a development or preview stage rather than production. No OpenAPI spec or detailed API documentation was found beyond the x402 challenge metadata. The agent's specific capabilities (e.g., whether it executes trades or only provides analysis) are not documented at the endpoint level.
Capabilities
Use cases
- —Querying an AI agent for Web3 trading insights and market analysis
- —Getting prediction market intelligence across Polymarket, Pump.fun, and other platforms
- —Pay-per-message interaction with an autonomous crypto trading agent
- —Integrating Web3 market scanning into agent-to-agent workflows
Fit
Best for
- —Developers experimenting with x402 pay-per-call AI agent endpoints
- —Users seeking aggregated crypto and prediction market intelligence via chat
- —Agent-to-agent commerce on Base Sepolia testnet
Not for
- —Production trading with real funds (this uses Base Sepolia testnet)
- —Users needing detailed API documentation or OpenAPI specs
- —Direct trade execution through this endpoint (not confirmed)
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f5d61a93d1a55ee56cd562 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <your-x402-payment-header>" \
-d '{"input": "What are the top prediction market opportunities right now?"}'Example
Request
{
"input": "What are the top prediction market opportunities right now?"
}Response
{
"response": "Based on current scanning, the top prediction market opportunities include..."
}Endpoint
Quality
The endpoint is live (402 challenge confirmed) with a clear input/output schema from the x402 challenge, but there is no OpenAPI spec, no dedicated API documentation, and no example responses. The endpoint runs on a testnet (Base Sepolia), suggesting it is in development. Most details about agent behavior are inferred from the Questflow landing page rather than endpoint-specific docs.
Warnings
- —Endpoint uses Base Sepolia testnet — not production-ready
- —No OpenAPI spec or API documentation found
- —Agent capabilities (trade execution vs. analysis only) are not documented at the endpoint level
- —Response example is inferred, not sourced from actual documentation
- —maxTimeoutSeconds is 1200 (20 minutes), suggesting potentially long response times
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base Sepolia with maxAmountRequired of 500000https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f5d61a93d1a55ee56cd562
- —The x402 challenge describes the endpoint as 'Web3 Trader | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f5d61a93d1a55ee56cd562
- —Questflow aggregates Polymarket, Pump.fun, Opinion Labs, OKX and other onchain marketshttps://api-dev.intra-tls2.dctx.link
- —The platform scans markets for patterns, sentiment shifts, and whale moveshttps://api-dev.intra-tls2.dctx.link
- —maxTimeoutSeconds is 1200 for this endpointhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f5d61a93d1a55ee56cd562