Stytch

Stytch

Stytch is a developer authentication platform that supplies the authorization layer for MCP servers and AI agents. Stytch's Connected Apps product turns an application into an OAuth 2.0 and OIDC identity provider, so it can grant agents scoped, auditable, revocable access to user data instead of sharing raw credentials. For teams building Model Context Protocol servers, Stytch handles the consent screens, token lifecycle, and human-in-the-loop approval that secure agent access requires, on top of its core passwordless, SSO, MFA, and RBAC auth.

Production credibility: Founded in 2020 by Reed McGinley-Stempel and Julianna Lamb, who met building authentication at Plaid. Stytch raised a $90M Series B led by Coatue in November 2021 at a reported valuation near $1B, with roughly $146M in total funding from backers including Coatue, Benchmark, Thrive Capital, and Index Ventures. It is an established, well-funded identity company with native MCP support in its Connected Apps product.

Key Features

• Connected Apps turns your app into an OAuth 2.0 / OIDC identity provider
• Native MCP support for scoped, revocable agent access to user data
• Agent-to-agent OAuth flows
• Granular consent management with human-in-the-loop approval
• Full token lifecycle — issue, validate, refresh, and revoke
• Trusted Auth Tokens to layer onto an existing auth provider
• Core auth: passwordless, SSO, MFA, RBAC, and device fingerprinting

Ideal Use Case

Engineering teams standing up an MCP server who need agents to access user data safely — issuing scoped tokens, capturing consent, and revoking access on demand — without re-architecting their existing identity stack to do it.

How Stytch differentiates

Most MCP listings are servers or registries; Stytch is the auth layer underneath them. Where a registry helps you find tools, Stytch governs what an agent is allowed to do once connected — scoped OAuth, consent, and revocation built for agent and MCP flows, from an established identity company rather than a new entrant. For teams whose blocker is secure, auditable agent access to user data, that is the reason it belongs in the MCP stack.

FAQ

Q: What is Stytch? A: Stytch is a developer authentication platform. Its Connected Apps product turns your app into an OAuth 2.0 / OIDC provider, giving AI agents and MCP servers scoped, auditable, revocable access to user data.

Q: How does Stytch relate to MCP? A: Stytch provides the authorization layer for MCP servers — scoped OAuth access for agents, consent management, human-in-the-loop approval, and token issue/refresh/revoke, including agent-to-agent OAuth.

Q: Is Stytch only for MCP? A: No. Stytch is a full auth platform with passwordless login, SSO, MFA, RBAC, and device fingerprinting; the Connected Apps and MCP support sit on top of that core.

Q: Stytch vs Auth0 or WorkOS? A: All are auth platforms. Stytch is differentiated for agent and MCP use by Connected Apps — turning your app into an OAuth provider with scoped, revocable agent access and agent-to-agent flows.

Q: Is Stytch free? A: Stytch offers a free tier with usage-based and enterprise pricing above it. Check the pricing page for current limits.

tl;dr

Stytch is the auth layer for MCP and AI agents — its Connected Apps product turns your app into an OAuth 2.0 / OIDC provider, giving agents scoped, revocable, auditable access to user data with consent and full token lifecycle. Founded 2020, ~$146M raised (Coatue, Benchmark, Thrive). The authorization pick for the MCP stack, alongside core passwordless, SSO, and MFA.