Chat-based Web3 trading agent powered by Questflow, payable via x402 on Base Sepolia
What it does
Web3 Trader is an x402-enabled AI agent endpoint hosted by Questflow. It accepts a text message via POST and returns a response from an autonomous Web3 trading agent. The endpoint is part of Questflow's "AI Clone" platform, which aggregates onchain markets including Polymarket, Pump.fun, Opinion Labs, and OKX to discover trading opportunities, execute trades, and generate signals.
The endpoint uses the x402 payment protocol on the Base Sepolia testnet, accepting USDC payments (asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e) with a maximum cost of 500,000 units (likely 0.50 USDC given 6 decimals) per request and a timeout of up to 1,200 seconds. The input schema is simple: a single JSON body field "input" containing your message string, and the output is a "response" string from the agent.
Note that this endpoint is on a development API domain (api-dev) and uses a testnet (Base Sepolia), suggesting it is not yet production-grade. No formal API documentation, OpenAPI spec, or detailed usage guides were found. The agent's specific trading capabilities, supported queries, and response format details are not documented beyond the basic schema in the x402 challenge.
Capabilities
Use cases
- —Querying an AI agent for Web3 trading insights and market analysis
- —Getting autonomous trading signals across aggregated onchain markets
- —Integrating a pay-per-use crypto trading agent into an automated pipeline
- —Asking about prediction market opportunities on Polymarket and similar platforms
Fit
Best for
- —Developers experimenting with x402 payment-gated AI agents on testnet
- —Agents needing on-demand Web3 market analysis via a simple chat interface
- —Prototyping pay-per-query trading assistant integrations
Not for
- —Production trading with real funds (this is on Base Sepolia testnet)
- —Users needing detailed API documentation or guaranteed SLAs
- —High-frequency trading requiring sub-second latency (1200s max timeout)
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0aa413f7c401908790146 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <your-x402-payment-header>" \
-d '{"input": "What are the best prediction market opportunities right now?"}'Example
Request
{
"input": "What are the best prediction market opportunities right now?"
}Response
{
"response": "Based on current market analysis, here are top prediction market opportunities..."
}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 is on a dev domain using a testnet, and the agent's actual capabilities are inferred from the Questflow landing page rather than documented API behavior.
Warnings
- —Endpoint is on a development domain (api-dev) and uses Base Sepolia testnet — not production
- —No formal API documentation or OpenAPI spec found
- —Example response is fabricated for illustration; actual agent response format is unknown
- —Max timeout of 1200 seconds suggests potentially long-running requests
- —USDC asset address is the Sepolia testnet token, not mainnet USDC
Citations
- —The endpoint accepts USDC on Base Sepolia with maxAmountRequired of 500000 and maxTimeoutSeconds of 1200https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0aa413f7c401908790146
- —Questflow aggregates Polymarket, Pump.fun, Opinion Labs, OKX and other onchain marketshttps://api-dev.intra-tls2.dctx.link
- —The input schema requires a string field 'input' and returns a string field 'response'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0aa413f7c401908790146
- —Payment is sent to address 0x50BE3e7a4faEA3e7bE1D6F17a2759281f7841295https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0aa413f7c401908790146