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 uses the x402 payment protocol on the Base Sepolia testnet, requiring USDC payment (up to 0.50 USDC per request, using the 6-decimal USDC contract at 0x036CbD53842c5426634e7929541eC2318f3dCF7e) before the agent processes your query.
Questflow's platform aggregates multiple onchain markets — including Polymarket, Pump.fun, Opinion Labs, and OKX — and provides AI "clones" that scan for trading opportunities, execute trades, and generate signals. This particular endpoint exposes a Web3 Trader agent that can be interacted with conversationally. The input schema is simple: a single JSON body field "input" (string) containing your message, and the output is a "response" (string) from the agent.
Note that this endpoint is on a development API server (api-dev) and uses the Base Sepolia testnet, indicating it is likely a staging or test deployment rather than a production service. No formal API documentation, OpenAPI spec, or detailed usage guides were found beyond the x402 challenge metadata and the Questflow landing page.
Capabilities
Use cases
- —Querying an AI agent for Web3 trading insights or market analysis
- —Programmatically interacting with an autonomous crypto trading assistant
- —Integrating a pay-per-use Web3 trading agent into an agent-to-agent workflow
- —Testing x402 payment flows with a conversational trading agent on Base Sepolia
Fit
Best for
- —Developers experimenting with x402 payment protocol and AI agents
- —Agent-to-agent systems needing a Web3-aware conversational trading endpoint
- —Prototyping pay-per-query crypto market intelligence pipelines
Not for
- —Production trading with real funds (this uses Base Sepolia testnet)
- —Users needing detailed API documentation or guaranteed SLAs
- —Non-crypto use cases with no Web3 relevance
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{"input": "What are the top trending prediction markets right now?"}'Example
Request
{
"input": "What are the top trending prediction markets right now?"
}Response
{
"response": "Here are the top trending prediction markets across Polymarket and Opinion Labs: ..."
}Endpoint
Quality
The endpoint is live (402 challenge confirmed) with a clear input/output schema from the x402 challenge metadata. However, there is no OpenAPI spec, no dedicated API documentation, no usage examples, and the endpoint is on a dev/testnet deployment. The response format is inferred from the outputSchema in the challenge, not from an actual successful response.
Warnings
- —Endpoint is on a development server (api-dev) using Base Sepolia testnet — not production
- —No formal API documentation or OpenAPI spec found
- —Example response is inferred from outputSchema, not from an actual API call
- —USDC asset address 0x036CbD53842c5426634e7929541eC2318f3dCF7e is the Sepolia testnet token
Citations
- —The x402 challenge requires payment on base-sepolia network with USDC asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e, maxAmountRequired 500000https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8
- —Questflow aggregates Polymarket, Pump.fun, Opinion Labs, OKX and other onchain marketshttps://api-dev.intra-tls2.dctx.link
- —The endpoint description from the x402 challenge is 'Web3 Trader | Powered by Questflow'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8
- —The input schema accepts a POST with a JSON body field 'input' (string) and returns a 'response' (string)https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f0ca069c162996ee718fd8