Pay-per-call Web3 trading agent via x402 on Base Sepolia, powered by Questflow
What it does
Web3 Trader is an x402-payable AI agent endpoint hosted by Questflow that accepts a text prompt and returns a response from a Web3-focused trading agent. The endpoint uses the x402 payment protocol on the Base Sepolia testnet, accepting USDC payments (up to 0.5 USDC per call) before processing requests. You send a POST request with an `input` string (your message to the agent) and receive a `response` string back.
The agent is part of Questflow's broader "AI Clone" platform, which aggregates onchain markets such as Polymarket, Pump.fun, OKX, and Opinion Labs. The platform's marketing claims capabilities around market scanning, alpha discovery, trade execution, and sentiment analysis across crypto, prediction, and meme-coin markets. However, the specific capabilities exposed through this single endpoint are limited to a chat-style input/output interface — there is no documented structured API for placing trades, retrieving market data, or configuring risk parameters directly via this endpoint.
No OpenAPI spec, detailed API documentation, or usage examples are provided. The endpoint is on a development subdomain (`api-dev`) using a testnet (Base Sepolia), suggesting this is not a production-grade service. The output schema is minimal: one input string field and one output string field. Timeout is set at 1200 seconds (20 minutes), which is unusually long for a chat-style API call.
Capabilities
Use cases
- —Querying an AI agent about Web3 market conditions or trading strategies
- —Getting AI-generated analysis on prediction markets, meme coins, or crypto tokens
- —Integrating a pay-per-call trading assistant into an agent workflow via x402
Fit
Best for
- —Developers experimenting with x402 payment protocol on testnet
- —Agents needing a simple chat-based Web3 market assistant
- —Exploring Questflow's AI clone agent capabilities programmatically
Not for
- —Production trading or financial decision-making (testnet only)
- —Structured market data retrieval or direct trade execution via API
- —Users needing detailed API documentation or guaranteed SLAs
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1ff319c162996ee72d0ba \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <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 Polymarket data, the top opportunities include..."
}Endpoint
Quality
No OpenAPI spec, no API documentation, no usage examples, and the endpoint is on a dev subdomain using a testnet. The only schema information comes from the x402 challenge's outputSchema, which is extremely minimal (one string in, one string out). The actual agent behavior is undocumented.
Warnings
- —Endpoint is on a development subdomain (api-dev) and uses Base Sepolia testnet — not production-ready
- —No API documentation found; /docs, /api, /pricing, /README all return 404
- —maxTimeoutSeconds is 1200 (20 minutes), which is unusually long
- —The response example is inferred — no actual response samples are available
- —Financial/trading domain: outputs should not be relied upon for real trading decisions
- —Asset address 0x036CbD53842c5426634e7929541eC2318f3dCF7e is testnet USDC, not real value
Citations
- —x402 challenge requires USDC payment on Base Sepolia with maxAmountRequired of 500000https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1ff319c162996ee72d0ba
- —Description from x402 challenge is 'Web3 Trader | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1ff319c162996ee72d0ba
- —Questflow platform aggregates Polymarket, Pump.fun, OKX, and Opinion Labs marketshttps://api-dev.intra-tls2.dctx.link
- —maxTimeoutSeconds is 1200https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f1ff319c162996ee72d0ba