Pay-per-call marketing AI agent on Questflow, accessible via x402 micropayments on Base Sepolia.
What it does
Marketer is an AI agent hosted on the Questflow platform, exposed as an x402-payable HTTP endpoint. It accepts a text message via 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.
Questflow is a platform for creating autonomous AI "Clones" that operate across onchain markets (Polymarket, Pump.fun, OKX, Opinion Labs, etc.). The Marketer agent appears to be one such clone, though its specific marketing capabilities are not documented beyond the name and the generic input/output schema. The endpoint accepts a JSON body with an "input" string field and returns a JSON object with a "response" string field. The maximum request timeout is 1200 seconds (20 minutes).
Because there is no OpenAPI spec, no dedicated documentation page, and no detailed description of what "Marketer" specifically does beyond its name, the exact scope of its marketing functionality is unclear. It is currently live and returning proper x402 payment challenges on the Base Sepolia test network.
Capabilities
Use cases
- —Sending marketing-related queries to an AI agent and receiving text responses
- —Integrating a pay-per-call marketing assistant into an automated agent workflow
- —Testing x402 micropayment flows with an AI agent on Base Sepolia
Fit
Best for
- —Developers experimenting with x402 payment protocol and AI agents
- —Teams wanting a pay-per-use marketing text generation endpoint
- —Builders integrating Questflow agents into multi-agent pipelines
Not for
- —Production marketing workflows (currently on testnet Base Sepolia)
- —Users needing detailed, documented marketing tool capabilities
- —Anyone requiring free or subscription-based access without crypto payments
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f886b57aa0f71b3c5e9a50 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>" \
-d '{"input": "Write a tweet promoting our new NFT collection"}'Example
Request
{
"input": "Write a tweet promoting our new NFT collection"
}Response
{
"response": "🚀 Our new NFT collection just dropped! Unique art, limited supply, and a community that's building the future of digital ownership. Mint yours now before they're gone. #NFT #Web3 #DigitalArt"
}Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with a basic input/output schema, but there is no OpenAPI spec, no documentation, no examples, and the agent's specific marketing capabilities are entirely undocumented beyond its name. The response example is inferred. This is on a testnet.
Warnings
- —No OpenAPI or dedicated documentation available — agent capabilities are inferred from the name 'Marketer' only
- —Running on Base Sepolia testnet, not mainnet — not suitable for production use
- —Output schema is minimal (single string in, single string out) with no detail on what the agent actually does
- —Maximum timeout of 1200 seconds suggests potentially long-running requests
Citations
- —The endpoint returns an x402 challenge requiring USDC payment on Base Sepolia with maxAmountRequired of 500000https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f886b57aa0f71b3c5e9a50
- —Questflow is a platform for AI Clones that aggregate onchain markets like Polymarket, Pump.fun, OKX, and Opinion Labshttps://api-dev.intra-tls2.dctx.link
- —The endpoint accepts a POST with an 'input' string field and returns a 'response' string fieldhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68f886b57aa0f71b3c5e9a50