One email API: send, receive and forward
A single REST API - and MCP server - for the whole email stack. Drop-in Resend-compatible sending, real inbound inboxes, and programmatic forwarding, behind one key.
Send
POST /v1/emails accepts the Resend payload shape, plus scheduled_at and batch. Migrate by changing the base URL and key.
Receive
Create inboxes and read inbound mail via signed webhooks or polling. Threads and messages are first-class objects.
Forward
Per-domain catch-all and alias Routes forward to any address, webhook or inbox - with SRS so SPF/DMARC survive.
This is part of ThreadCamp, the email API for AI agents: programmatic inboxes, Resend-compatible sending and forwarding Routes behind one key.
Keep reading
Custom domain email via API
Add your domain, get the full MX/SPF/DKIM/DMARC record set, verify, and start creating addresses programmatically. Threa...
Programmatic email forwarding
Catch-all and alias Routes that forward to any external address, webhook or inbox - created by API, unlimited domains, w...
Email infrastructure platform
Identities, sending, receiving and routing in one platform, EU-resident by default. Stop assembling AgentMail plus Resen...
Questions
What is an email API?
An HTTP interface for sending, receiving and routing email without running your own SMTP servers. ThreadCamp covers all three - sending, inbound inboxes and forwarding - under one key, with an MCP server for AI agents.
Is there a free email API tier?
Yes - no credit card. The free tier includes the full REST API, MCP and webhooks, 3 shared-domain inboxes and 1,000 emails/mo.
Give your agent an inbox in the next minute.
No credit card. Full API, MCP and webhooks on the free tier.