# Announcing MCP Authentication: secure your MCP servers with PropelAuth

## Express Posts

Articles and insights about Express from the PropelAuth team.

### Topics

- [Product](/content/blog/tag/product/index.html)  
- [Authentication](/content/blog/tag/authentication/index.html)  
- [Coding](/content/blog/tag/coding/index.html)  
- [Guide](/content/blog/tag/guide/index.html)  
- [B2B](/content/blog/tag/b2b/index.html)  
- [Express](/content/blog/tag/express/index.html)

### Articles

#### [Securing a GenAI Service with API Key Validation and Trial Management](/content/post/securing-genai-service-with-api-key-validation/index.html)

Learn how to secure a GenAI service with PropelAuth's API key authentication, custom user properties, and account management features....

#### [React/Express Starter App](/content/post/react-express-starter-app/index.html)

In this guide, we’ll build an example B2B application in React where users can sign up, login, manage their accounts, and view organization and member...

#### [Instant Multi-Tenant GraphQL APIs with PostGraphile, RLS, and PropelAuth](/content/post/instant-multi-tenant-graphql-apis-with-postgraphile-rls-and-propelauth/index.html)

GraphQL is a query language for APIs that can help your engineering team move faster. Just one set of developers can build and maintain the overall sc...

#### [React + Express Authentication Guide](/content/post/react-express-authentication-guide/index.html)

In this guide, we’ll build an example application in React/Express where users can sign up, login, and manage their accounts. We'll include social log...