Temp Mail Agency vs MailSlurp

MailSlurp is a mature email-and-SMS testing platform for QA teams, and it now ships a hosted MCP server too. Temp Mail Agency is narrower and cheaper — free disposable inboxes for agents with a one-click key, no dashboard. Here is how they line up.

	Temp Mail Agency	MailSlurp
Price	Free — 100 emails/day per key, no plans, no card	Free tier (250 received emails/mo, 100 inbox creations, 25 retained inboxes); paid tiers for volume
MCP server	Yes — free, API-key authenticated	Yes — hosted MCP, 16 tools, account/API-key based
Signup / API key	Free API key — one-click sign in with Google	Account and API key required; inboxes are managed in a dashboard
Scope	Disposable email inboxes only	Email + SMS testing, rendering and placement tests
Sending email	No — receive-only by design	Sandbox/internal sends on free; external sends on higher tiers
Verification codes	Built-in tool: get_verification_code, plus links extracted from every message	Wait-for / extraction helpers inside a broad testing API
Best at	Free agent sign-ups and OTP at zero setup cost	Structured QA of email and SMS flows

Choose Temp Mail Agency if…

…your agent just needs disposable inboxes and verification codes, free, with nothing to configure — the common case for sign-ups, trials and light end-to-end checks.

Choose MailSlurp if…

…you are a QA team testing email and SMS together, with rendering checks, placement tests and team dashboards. MailSlurp is a testing platform; Temp Mail Agency is an inbox utility.

FAQ

Is MailSlurp free?

MailSlurp has a free tier with monthly allowances (for example 250 received emails and 25 retained inboxes, per its pricing page), with paid tiers above it. Temp Mail Agency is free with a Google sign-in key: 100 emails/day, no paid tiers.

Does MailSlurp have an MCP server?

Yes, a hosted one with around 16 tools. Both services speak MCP; the difference is account setup, scope and price.

More comparisons

See also the free MCP server and the developer API.