AI app builders
Use SuperSend TX in Lovable, Replit, Bolt, Base44, v0, and similar AI builders. Add your stx_… API key as a secret, paste the builder prompt, and let the agent wire POST /emails.
Pick your builder
| Builder | Best for | Guide |
|---|---|---|
| Lovable | React + Supabase apps, chat-driven features | Secrets + agent prompt |
| Replit | Full-stack Replit Agent projects | Replit Secrets + agent prompt |
| Bolt.new | Vite / React prototypes from chat | .env + agent prompt |
| Base44 | Base44 apps with optional custom email | When to use TX vs built-in mail |
| v0 | Next.js from Vercel v0 | Route Handler + Vercel env |
Before you paste a prompt
- Create a SuperSend TX account and an API key (
stx_…). - Store it as
SUPERSENDTX_API_KEYin the builder’s secrets / env UI (server-side only). - For a first send before your domain verifies, use the sandbox rules in Quickstart and Agent skill notes.
Standard env var
SUPERSENDTX_API_KEY=stx_your_key_hereSome builders also accept STX_API_KEY — if their UI suggests that name, map it to the same stx_… value. Prefer SUPERSENDTX_API_KEY in generated code for consistency with our SDK and docs.
Reference
- Agent skill notes — integration defaults for AI agents
- OpenAPI — API contract
- Next.js — server-side send pattern
- Auth provider email — Clerk / Auth.js hooks
- Supabase Auth email — Send Email hook + Edge Function