Resend Inboxes
Resend Inboxes lets developers create email inboxes through Resend's API, receive and reply to threads, share inboxes with a team, and connect AI agents through MCP or skills to triage, label and draft replies.
Why it matters
For teams that want an AI agent or app to handle email, such as support, recruiting or on-call alerts, it gives each agent a real address and an API for threads, instead of wiring up a mailbox by hand.
Highlights
- Create an inbox with one API call, list conversations as they arrive, fetch threads, and reply from your app, an agent or a workflow.
- Connect agents through MCP or skills; the page names Claude Code, Cursor, Codex, Grok and Gemini.
- Agentic workflows: give an agent plain-language instructions to label, triage, forward and draft replies, triggered by webhooks, with your team staying in control.
- Shared inboxes let teammates assign conversations and pick up where someone else left off.
- Free tier covers up to 3 inboxes and 3,000 emails sent or received, with no credit card.
Taken from the project's own README, docs or launch page. Claims about speed or accuracy are the maker's unless stated otherwise.
Worth knowing: Agents connected to an inbox can read every message in it; review what each agent may send before turning on automatic replies.
Quick facts
| Pricing | Free for up to 3 inboxes and 3,000 emails; paid tiers on Resend's pricing page (not checked)not verified |
|---|---|
| Free or paid | Freemium |
| License | Proprietary |
| Language | REST API; Node.js SDK |
| Platform | Web dashboard and API |
| GitHub stars | n/a (not a GitHub project) |
| Maker | Resend |
Links
- Official site: https://resend.com/products/inboxes
- Docs: https://resend.com/docs/api-reference/inboxes/create-inbox
Related ranking
See how established tools compare in Best AI Agents That Do Tasks for You. New releases aren't scored until we review them against the rubric.
What we couldn't verify
- quick_facts.pricing (paid tiers)
Checked 2026-10-22 from the tool's own pages. Prices and star counts change, so confirm on the official site. Listing here is not a ranking or an endorsement.
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