Focus on building your MCP server's core logic. Let MCP Access handle OAuth authentication, authorization, and intelligent protocol inspection with our free and easy-to-integrate packages.
MCP Access goes beyond basic OAuth to provide intelligent, MCP-aware security that understands what your users are actually trying to do.
Understands MCP requests semantically—whether users are listing tools, calling functions, or accessing resources. Applies permissions at the protocol level, not just HTTP level.
Automatically filters unauthorized tools, prompts, and resources from server responses. Users only see what they're allowed to use—no manual filtering required.
Install a single package tailored to your tech stack. With minimal configuration, secure your MCP server in minutes, not weeks.
Built-in protection against confused deputy attacks, session hijacking, and token passthrough vulnerabilities. Follows MCP security best practices out-of-the-box.
Dedicated packages for Node.js/Express, Python/FastAPI, FastMCP, and more. Each optimized for its ecosystem's conventions and patterns.
Regular updates keep pace with MCP specification changes and emerging security threats. Your server stays secure and compliant automatically.
See how MCP Access compares to other MCP authentication approaches
Developing secure MCP servers comes with complex challenges that divert your team from its primary goals.
Complexities like confused deputy attacks, session hijacking, and improper token handling can lead to critical security flaws. One small oversight can expose your entire system.
Implementing OAuth flows and MCP protocol handling from scratch for every project is time-consuming, repetitive, and error-prone, bloating your codebase.
The Model Context Protocol and Oauth 2.1 implementation evolve rapidly. Keeping your implementation compliant with the latest specifications and security best practices is a continuous effort.
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OAuth 2.1 (and OAuth 2.0 in the interim) is the industry standard for securing APIs and services, and MCP servers are no exception. Without OAuth, access to tools, prompts, and resources is often unprotected or handled with custom code. Implementing OAuth 2.0 / 2.1 ensures secure, standards-based authentication and authorization, prevents unauthorized access, and allows fine-grained permission control using scopes and roles defined in your authentication provider.
Instead of manually configuring .well-known endpoints, token validation, or dynamic client registration, MCP Access handles these automatically from your authentication provider’s configuration. Developers only need to install the package, supply their Auth Provider details, and the package generates all required OAuth 2.0 / 2.1 endpoints and enforces secure authentication out-of-the-box.
MCP Access follows a name-convention based permission system. Permissions are matched to MCP resources using the format servername:method:resource_name. This means you don’t need to configure them inside the package itself—just assign the correct scopes or claims inside your Auth Provider. For example, granting myserver:tools:list allows a user to list tools, while myserver:tools:call:toolA grants permission to invoke Tool A.
MCP Access strictly adheres to OAuth 2.0 / 2.1 and related RFCs. If a request contains an invalid token, missing scope, or expired credential, the package automatically returns proper 401 Unauthorized or 403 Forbidden responses with the correct WWW-Authenticate headers. Developers don’t need to manually handle error responses—MCP Access ensures consistent and standards-compliant behavior.
Custom implementations often miss key OAuth 2.0 / 2.1 security requirements, leaving MCP servers vulnerable to issues like token leakage, improper scope handling, or confused deputy attacks. MCP Access leverages your Auth Provider for token handling and enforces secure authorization logic automatically, ensuring best practices like least privilege, proper error handling, and safe integration without extra configuration.
