Authentication middleware

6 reusable Authentication middleware libraries across every platform — libraries, SDKs, and drop-in systems. You should never have to know which ecosystem it lives in.

• batesian

  by calbebop · Free · github

  Active security scanner for A2A and MCP servers

  AIAuthenticationSecurity   Go

• goscim

  by arturoeanton · Free · github

  🚀 Lightning-fast SCIM 2.0 server in Go that makes identity management simple and scalable. Built for developers who need enterprise-grade user provisioning without the enterprise complexity.

  AuthenticationAuthorizationAPI   Go

• local-vault

  by zain-23 · Free · github

  Encrypted peer to peer secret manager. Sync .env secret between dev machines - your secrets never touch a server in readable form.

  AuthenticationDatabaseEncryptionDeveloper Tools   Go

• Nakama

  by Heroic Labs · Free · Apache-2.0 · middleware

  Open-source server for social and realtime games and apps — auth, chat, matchmaking, leaderboards.

  NetworkingAuthenticationLeaderboards   GoUnityGodotUnreal

• OpenMCP-Chain

  by benoit08260 · Free · github

  ⚡ Integrate blockchain and AI with OpenMCP-Chain, a secure protocol stack for AI Agents to leverage Web3 capabilities with full audit trails.

  Authentication   Go

• pixiv-cli

  by FlanChanXwO · Free · github

  Pixiv, in your terminal — a CLI, MCP server, and Go SDK for discovery, accounts, creators, collections, and downloads.

  AuthenticationAPIDeveloper Tools   Go