Hey HN, I built KeyID because I kept hitting the same wall: every AI agent that needs to sign up for a website needs a real email address, and there's no good free way to get one programmatically.
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 ($per mailbox).
What KeyID does: One API call → real email address. The agent generates an Ed25519 keypair, calls provision(), and gets an address on a shared domain pool. No API keys, no human in the loop.
From there agents can:
Send/receive email
Auto-extract verification codes from incoming messages
Follow verification links server-side
Track multi-step signup flows with browser state persistence
Get phone numbers for SMS verification
Generate TOTP 2FA codes
How it stays free: Shared rotating domain pool. We manage DKIM/SPF/DMARC, warm-up, and reputation. When a domain degrades, it rotates out. No per-mailbox cost.
MCP server (47 tools) — works with Claude, Cursor, Windsurf out of the box:
{"mcpServers":{"keyid":{"url":"https://keyid.ai/mcp"}}}
Also has JS (@keyid/sdk) and Python (keyid) SDKs for direct integration.
Free for 1,000 accounts. Open source: https://github.com/KeyID-AI/KeyID
Happy to answer questions about the architecture, the domain rotation model, or anything else.
The problem: Agents need email for signups, verification codes, 2FA, and communication. You can use Gmail (manual setup, doesn't scale), disposable email APIs (get blocked), or paid services like AgentMail ($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.