SuperSend TX + Replit

Wire SuperSend TX into a Replit Agent project with Replit Secrets and a copy-paste agent prompt.

When to use SuperSend TX

Replit Agent builds that need password reset, invites, or notifications
Node, Python, or other backends where you control server env vars
Production mail from your own domain after verify

1. Add your API key

Create an API key at app.supersendtx.com (stx_…).
In Replit, open Tools → Secrets (or Integrations → secrets, depending on Replit UI).
Create a secret:

Key	Value
`SUPERSENDTX_API_KEY`	`stx_your_key_here`

Replit injects secrets as environment variables in the repl runtime. Access via process.env.SUPERSENDTX_API_KEY (Node) or os.environ["SUPERSENDTX_API_KEY"] (Python).

2. Paste this prompt in Replit Agent

Integrate SuperSend TX transactional email into this Replit project.

Docs:
- https://docs.supersendtx.com/ai/agent-skill
- https://docs.supersendtx.com/openapi.yaml
- https://docs.supersendtx.com/builders/replit

Rules:
1. Read SUPERSENDTX_API_KEY from Replit Secrets (already configured). Never log or expose the key to the client.
2. Send with POST https://api.supersendtx.com/emails and Authorization: Bearer <key>.
3. Sandbox: from "noreply@mail.supersendtx.com", to only the SuperSend TX account email until a domain is verified.
4. Implement server-side email for at least one flow (welcome, reset, or notification).
5. Use html and text fields; prefer supersendtx npm package on Node.

When ready for production, verify a sending domain in SuperSend TX and update from addresses.

3. Minimal Express route (Node)

import express from 'express'

const app = express()
app.use(express.json())

app.post('/api/send-test', async (req, res) => {
  const apiKey = process.env.SUPERSENDTX_API_KEY
  if (!apiKey) return res.status(500).json({ error: 'Missing SUPERSENDTX_API_KEY' })

  const upstream = await fetch('https://api.supersendtx.com/emails', {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${apiKey}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(req.body),
  })

  const data = await upstream.json()
  res.status(upstream.status).json(data)
})

Sandbox self-test

Send to your SuperSend TX account email only, with from: "noreply@mail.supersendtx.com", until your domain is verified.

Production

Verify your domain in SuperSend TX, then set from to noreply@yourdomain.com (or similar on that domain).