SENDERFLY
One API.
Every provider.
Keep your provider accounts. SenderFly gives you one stable endpoint, routing strategies and automatic failover — with your provider keys encrypted in your own instance.
- 11+ providers
- Automatic failover
- REST + MCP
- Your keys, your instance
Authorization: Bearer sfly_live_…
{ "from": "hello@yourdomain.com",
"to": ["customer@example.com"],
"subject": "Your order shipped" }
✓ Resend → SendGrid → SMTP
BUILT IN
Everything included.
Nothing in the way.
Switch providers without changing application code. SenderFly keeps the keys, routing and delivery history; your app keeps one stable integration.
Routing that adapts
Failover, cost-aware, round-robin and primary/backup strategies for every send.
See routing →One API for agents
Call the same gateway from your app, CLI or MCP-compatible AI agent.
API & MCP →Every delivery, visible
Provider attempts, bounces, suppressions and latency in one delivery log.
Open SenderFly →DETAILS THAT MATTER
One endpoint.
Every provider.
Switch providers without changing application code. SenderFly keeps the keys, routing and delivery history; your app keeps one stable integration.
- Resend, SendGrid, Postmark, Mailgun and more
- Provider failover and cost routing
- Suppression lists and delivery logs
- REST API and MCP for agents
READY WHEN YOU ARE
Send through the best provider.
Start with your own accounts and keep your costs transparent.