Temp Mail Agency vs AgentMail
AgentMail is the best-known email provider built specifically for AI agents: persistent inboxes, sending and receiving, custom domains and SDKs. Temp Mail Agency takes the opposite corner — disposable inboxes over a free MCP server with zero setup. They solve different problems, so here is the honest side-by-side.
| Temp Mail Agency | AgentMail | |
|---|---|---|
| Price | Free — 100 emails/day per key, no plans, no card | Free tier $0 (3 inboxes, 3,000 emails/mo); Developer $20/mo (10 inboxes, 10,000 emails); Startup $200/mo |
| Signup / API key | Free API key — one-click sign in with Google | Account and API key required (agents can self-provision with a human email) |
| MCP server | Yes — free, API-key authenticated | Yes — hosted MCP with OAuth or API-key authentication, ~24 tools |
| REST API | Yes — free developer API (same key, shared cap) | Yes, plus TypeScript and Python SDKs and a CLI |
| Sending email | No — receive-only by design | Yes — full two-way email with threading |
| Inbox persistence | Disposable — built for sign-ups and verification | Persistent — messages never expire on any plan |
| Custom domains | No | Yes — 10 on Developer, 150 on Startup |
| Verification codes | Built-in tool: get_verification_code, plus links extracted from every message | Read messages via API/MCP and parse codes yourself |
| Best at | Free disposable inboxes for agent sign-ups and OTP | Long-lived agent mailboxes and two-way conversations |
Choose Temp Mail Agency if…
…your agent needs a throwaway address right now: create_inbox returns one in a single call, with one Google sign-in for a free key — no billing, no paid tiers — and get_verification_code pulls the OTP out of the reply. For high-volume sign-up and testing flows, free beats metered.
Choose AgentMail if…
…your agent needs a real, persistent mailbox: sending email, holding threaded conversations, using your own domain, or keeping mail forever. That is exactly what AgentMail's paid plans are for, and its free tier (3 inboxes) is a fair way to start.
FAQ
Is Temp Mail Agency a free AgentMail alternative?
For disposable, receive-only inboxes, yes — the MCP server and API are free with a Google sign-in key and a shared 100 emails/day, while AgentMail's free tier is capped at 3 inboxes and 3,000 emails a month. For sending, custom domains and persistent mailboxes, AgentMail offers things Temp Mail Agency deliberately does not.
Does AgentMail have an MCP server?
Yes — AgentMail runs a hosted MCP server that authenticates with OAuth or an API key. Temp Mail Agency's MCP server is also hosted, but uses a free API key from a one-click Google sign-in, and each inbox is additionally controlled by its own per-inbox token.
Can I switch between them?
Easily. Both speak MCP over HTTP, so an agent configuration can point at either endpoint — or use Temp Mail Agency for disposable sign-ups and AgentMail for mailboxes that must persist.
More comparisons
See also the free MCP server and the developer API.