But what is the use case here? How often do agents need to get an email address? What’s the argument for letting agents create accounts? I can see letting an agent use my account, but why do they need their own?

And all of this has great legitimate uses, why would a domain degrade?

The problem: Agents need email for signups, verification codes, 2FA, and communication. You can use Gmail (manual setup, doesn't scale), disposable email APIs (get blocked), or paid services like AgentMail ($per mailbox).

What KeyID does: One API call → real email address. The agent generates an Ed25519 keypair, calls provision(), and gets an address on a shared domain pool. No API keys, no human in the loop.

From there agents can:

Send/receive email Auto-extract verification codes from incoming messages Follow verification links server-side Track multi-step signup flows with browser state persistence Get phone numbers for SMS verification Generate TOTP 2FA codes How it stays free: Shared rotating domain pool. We manage DKIM/SPF/DMARC, warm-up, and reputation. When a domain degrades, it rotates out. No per-mailbox cost.

MCP server (47 tools) — works with Claude, Cursor, Windsurf out of the box:

{"mcpServers":{"keyid":{"url":"https://keyid.ai/mcp"}}} Also has JS (@keyid/sdk) and Python (keyid) SDKs for direct integration.

Free for 1,000 accounts. Open source: https://github.com/KeyID-AI/KeyID

Happy to answer questions about the architecture, the domain rotation model, or anything else.