Question 1

What does SealGate do?

Accepted Answer

SealGate is an API and browser SDK for adding passkeys (FIDO2 / WebAuthn, using biometrics such as Touch ID or Windows Hello) to an existing login. It handles registration, authentication, revocation and recovery. Your users' names, email addresses and your login screen stay with you.

Question 2

Does SealGate store user data?

Accepted Answer

SealGate stores only the mapping between public keys and your user IDs, and authentication records. It does not receive names or email addresses.

Question 3

How is pricing determined?

Accepted Answer

Pricing is step-based: your monthly price is set by the band your monthly active users (MAU) fall into. Up to 1,000 MAU: free; 1,001–10,000 MAU: $65 per month; 10,001–100,000 MAU: $350 per month; 100,001+ MAU: $350 per month (USD, excluding tax). No setup fee, and no charges for devices or API requests.

Question 4

What happens when a user loses their device?

Accepted Answer

After you verify the user's identity on your side, issue a recovery token. The user can then register a passkey again on a new device. SealGate does not verify identity.

Question 5

Can I integrate SealGate using an AI agent?

Accepted Answer

Yes. There is an MCP server (https://api.sealgate.jp/v1/mcp) and a skill (https://sealgate.jp/skill/SKILL.md). Give them to Claude Code, Cursor or a similar agent, and it can carry out the integration and manage users and keys with its tools.

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