Tools / Authentication

Stytch

Authentication

API-first authentication and session management for applications and agents.

What it solves

MCP changes the auth question from 'which human is logging in' to 'which agent is acting for which human, with what consent'. Stytch provides the auth building blocks — sessions, OAuth, organizations — that let MCP servers authenticate users and represent agent-acted-on-behalf-of relationships cleanly.

How it works

You integrate Stytch's APIs for login, session management, and OAuth. For MCP specifically, its OAuth support lets a server issue scoped, consented tokens that an agent presents when calling tools, instead of the server trusting whatever client shows up.

Pros & cons

Pros

API-first design maps well onto MCP's machine-to-machine auth needs.
OAuth and session primitives cover both human login and agent token flows.
Usage-based pricing with a meaningful free tier for evaluation.

Considerations

You still design the consent and scope model yourself — Stytch supplies primitives, not policy.
B2B features you may want later (SSO, SCIM) overlap with dedicated vendors like WorkOS.
Usage-based costs scale with monthly active users and API calls.

When to choose it

Choose Stytch when you are building an MCP server or agent-facing product and want modern auth primitives you assemble yourself, rather than an enterprise SSO add-on.

Disclaimer: Tool capabilities and pricing change. Verify current details on the vendor's official website before making procurement decisions.