Temp Mail Agency vs Guerrilla Mail

Guerrilla Mail is the original disposable email service — free since 2011, with a simple session-based API and no key. It predates MCP entirely, so agents have to hand-roll HTTP calls, and its addresses expire after about an hour. Temp Mail Agency keeps it free — a one-click Google key instead of accounts and dashboards — and adds the agent-native layer.

	Temp Mail Agency	Guerrilla Mail
Price	Free — 100 emails/day per key, no plans, no card	Free, with rate limits
MCP server	Yes — free, API-key authenticated	None — API only
API style	MCP + REST, token per inbox	Session-based JSON API, no key
Address lifetime	Address stays until you delete it	About 1 hour
Sending email	No — receive-only by design	Yes — Guerrilla Mail can send
Verification codes	Built-in tool: get_verification_code, plus links extracted from every message	Fetch the message list and parse it yourself
Best at	Agent flows over MCP with lasting addresses	Quick one-hour throwaway addresses via a simple API

Choose Temp Mail Agency if…

…your agent works over MCP, needs the address to survive a long sign-up flow, or wants verification codes extracted for it.

Choose Guerrilla Mail if…

…you need a one-hour address through the simplest possible API calls, or you specifically need to send a message from a disposable address.

FAQ

Does Guerrilla Mail have an MCP server?

No. Guerrilla Mail offers a session-based web API, which predates the Model Context Protocol. Temp Mail Agency exposes the same kind of disposable inboxes as a standard MCP server.

How long do the inboxes last?

Guerrilla Mail addresses live about an hour. A Temp Mail Agency address stays active until you delete it, which suits slower verification flows.

More comparisons

See also the free MCP server and the developer API.