MailSlurp alternative

The MailSlurp alternative for production, not just tests

MailSlurp is great for test inboxes. ThreadCamp gives you real inboxes plus production sending and forwarding - with a genuine free tier and an MCP server for agents.

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Side by side

MailSlurp vs ThreadCamp

Point	MailSlurp	ThreadCamp
Use	Test/QA inboxes	Production inboxes + real sending + forwarding
Free tier	No free tier	Free, no credit card
Agents	SDKs	MCP tools incl. wait_for_message for OTP

ThreadCamp is the email API for AI agents: inboxes, sending and forwarding with SRS behind one key.

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Other alternatives

AgentMail alternative

$20 -> $200 pricing cliff, no forwarding Routes, no scheduled send

Resend alternative

sending-only inbox model; one identity per domain, no inboxes

SendGrid alternative

seat-based, complex, no agent/MCP tooling

Questions

Can I use ThreadCamp for OTP retrieval in tests and production?

Yes. wait_for_message polls an inbox for the incoming code, and the same inboxes work in production, not just test mode.

Switch in an afternoon.

No credit card. Full API, MCP and webhooks on the free tier.

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