# Clerk — card for AI agents

Authentication and user management API for sign-up, sign-in, and user profiles.

Maker: Clerk · category: Auth and user accounts

## Price (official page)
- Free tier: Up to 50,000 MRU (monthly retained users) per app
- Paid from $25/month
- Usage price: $0.02/mo per MRU (50,001-100,000), $0.018/mo (100,001-1M), $0.015/mo (1M-10M), $0.012/mo (10M+)
- Pricing page: https://clerk.com/pricing (checked 2026-10-09)
- Note: Added automatically: its SDK was in 52 of the public agent repos we sampled when it was added. Prices read from the official pricing page.

## Connect
- npm: `npm install @clerk/nextjs`
- Repository: https://github.com/clerk/javascript

## Other APIs in this category
- hCaptcha: https://agentgid.com/apis/hcaptcha/agent.md
- Descope: https://agentgid.com/apis/descope/agent.md
- Auth0: https://agentgid.com/apis/auth0/agent.md
- Keycloak: https://agentgid.com/apis/keycloak/agent.md
- Stytch: https://agentgid.com/apis/stytch/agent.md

## Links
- AgentGid page: https://agentgid.com/apis/clerk/

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AgentGid's catalog is curated: every entry was checked against the maker's official pages (registry, repository, license and pricing pages) on the date shown; a license value shows the quote it stands on wherever AgentGid has one. Usage numbers come from AgentGid's own scan of public repositories set up for AI coding agents. Claims by makers are reported, not tested by AgentGid.