MCP Auth JavaScript/TypeScript SDK

MCP Auth JavaScript/TypeScript SDK providing authentication middleware for building secure MCP servers in Node.js — implementing OAuth 2.0, API key validation, and JWT verification for TypeScript/JavaScript MCP server applications, enabling developers to add enterprise-grade authentication to custom MCP servers.

Evaluated Mar 06, 2026 (0d ago) vcurrent
Homepage ↗ Repo ↗ Developer Tools mcp-auth authentication oauth typescript javascript sdk security
⚙ Agent Friendliness
78
/ 100
Can an agent use this?
🔒 Security
85
/ 100
Is it safe for agents?
⚡ Reliability
72
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
75
Documentation
78
Error Messages
75
Auth Simplicity
78
Rate Limits
85

🔒 Security

TLS Enforcement
85
Auth Strength
88
Scope Granularity
85
Dep. Hygiene
80
Secret Handling
85

Auth SDK — validate tokens server-side. HTTPS required. Rotate secrets. Secure vault for client secrets. Review for CVEs.

⚡ Reliability

Uptime/SLA
75
Version Stability
72
Breaking Changes
70
Error Recovery
72
AF Security Reliability

Best When

A TypeScript/JavaScript developer building an MCP server that needs proper OAuth 2.0 or API key authentication for multi-user or public deployments.

Avoid When

You're consuming MCP servers, not building them — or your MCP is a local single-user tool.

Use Cases

  • • Adding OAuth 2.0 authentication to TypeScript MCP servers
  • • Implementing JWT validation in Node.js MCP server middleware
  • • Building multi-tenant MCP servers with per-user auth from the JS ecosystem
  • • Securing MCP tool endpoints with role-based access control in TypeScript
  • • Standardizing auth across multiple Node.js MCP servers
  • • Integrating with Auth0, Okta, or Cognito in TypeScript MCP servers

Not For

  • • Consuming MCP servers (this is for building/securing them)
  • • Python MCP servers (use mcp-auth/python instead)
  • • Simple single-user local MCP servers (auth overhead not needed)

Interface

REST API
No
GraphQL
No
gRPC
No
MCP Server
No ↗
SDK
Yes
Webhooks
No
OpenAPI Spec ↗

Authentication

Methods: oauth2 api_key
OAuth: Yes Scopes: Yes

This IS the auth library — implements OAuth 2.0 and JWT validation for MCP servers. No auth required to use the npm package.

Pricing

Model: free
Free tier: Yes
Requires CC: No

Free, open source MIT-licensed SDK available on npm.

Agent Metadata

Pagination
none
Idempotent
Full
Retry Guidance
Not documented

Known Gotchas

  • ⚠ SDK for building MCP servers — not consumable as an MCP server itself
  • ⚠ npm package version must match MCP spec version being used
  • ⚠ JWT key rotation requires application restart or hot-reload implementation
  • ⚠ Community organization (mcp-auth) — not official Anthropic/MCP SDK team
  • ⚠ TypeScript strict mode recommended — type safety critical for auth code
  • ⚠ OAuth redirect URIs must be configured correctly for each deployment environment

Alternatives

mcp-auth/python fastmcp mcp-server-template

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for MCP Auth JavaScript/TypeScript SDK.

$99
API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-06.

5208
Packages Evaluated
26151
Need Evaluation
173
Need Re-evaluation
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