Send emails via no-reply@questflow.ai through a pay-per-use x402 agent endpoint.
What it does
This x402-enabled endpoint exposes a Questflow AI agent that can send emails using the no-reply@questflow.ai address. It is accessed via an HTTP POST request with a JSON body containing an "input" string message. Payment is handled through the x402 protocol on the Base Sepolia testnet using USDC, with a maximum amount of 100,000 units (likely 0.10 USDC given 6-decimal USDC). The agent processes the input and returns a string response.
Questflow is a platform focused on autonomous AI agents ("Clones") that operate across onchain markets. This particular agent appears to be a utility agent for programmatic email sending rather than a trading agent. The endpoint is on a development/staging API domain (api-dev), which suggests it may not be production-ready. No OpenAPI schema, dedicated documentation, or pricing page was found beyond the x402 challenge metadata.
The x402 challenge specifies the payment address, asset (USDC on Base Sepolia at 0x036CbD53842c5426634e7929541eC2318f3dCF7e), and a maximum timeout of 1200 seconds. The output schema is minimal: a single "input" string field in the request and a single "response" string field in the reply. No further details about email formatting, recipient specification, or rate limits are documented.
Capabilities
Use cases
- —Sending automated notification emails from an AI agent workflow
- —Triggering transactional emails programmatically with crypto micropayments
- —Integrating email-sending capability into an autonomous agent pipeline
Fit
Best for
- —Developers experimenting with x402 pay-per-use email sending
- —Agent-to-agent workflows that need to dispatch emails
- —Prototyping email notifications on a testnet-based payment rail
Not for
- —Production bulk email campaigns (this is a dev/staging endpoint on testnet)
- —Users needing custom sender addresses or rich HTML email templates
- —High-volume transactional email with SLA guarantees
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:682303bfd973977d61d66a38 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{"input": "Send an email to user@example.com with subject Hello and body Welcome!"}'Example
Request
{
"input": "Send an email to user@example.com with subject Hello and body Welcome to Questflow!"
}Response
{
"response": "Email sent successfully to user@example.com."
}Endpoint
Quality
Only the x402 challenge metadata is available; there is no OpenAPI spec, no dedicated documentation, no usage examples, and the endpoint is on a dev/staging domain using testnet tokens. The input/output schema is extremely minimal and the email-sending behavior must be inferred from the description string.
Warnings
- —Endpoint is on a development domain (api-dev) and uses Base Sepolia testnet — not production-ready.
- —No documentation, OpenAPI spec, or usage guide found.
- —Email sending behavior (recipient, subject, body formatting) is entirely undocumented — the agent presumably parses natural language input.
- —The example response is fabricated for illustration; actual response format is unknown.
- —USDC asset is on testnet (Base Sepolia) so real monetary value is not involved.
Citations
- —The endpoint accepts x402 payment on Base Sepolia using USDC at asset address 0x036CbD53842c5426634e7929541eC2318f3dCF7e with maxAmountRequired of 100000.https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:682303bfd973977d61d66a38
- —The agent description states it can send email using no-reply@questflow.ai.https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:682303bfd973977d61d66a38
- —Questflow is a platform for autonomous AI agents operating across onchain markets.https://api-dev.intra-tls2.dctx.link