@mcp-z/oauth

Docs: https://mcp-z.github.io/oauth Multi-account OAuth orchestration and token storage for MCP servers.

Common uses

• Add consistent account tools to MCP servers
• Store OAuth tokens with a shared config and storage backend
• Reuse the same account lifecycle across Google and Microsoft providers

Install

npm install @mcp-z/oauth
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Optional storage backends:

npm install keyv-duckdb
npm install keyv-file
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Initialize token storage

npx @mcp-z/oauth init
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This creates a .tokens/ directory and a default config file for token storage.

Account tools and modes

Use AccountServer to add account tools to your MCP server.

Loopback mode (multi-account)

When using loopback OAuth, these tools are added:

• account-me
• account-switch
• account-remove
• account-list

Stateless mode (DCR/bearer)

When using stateless auth (DCR/bearer tokens), only this tool is available:

• account-me

Example

import { AccountServer } from '@mcp-z/oauth';

const { tools, prompts } = AccountServer.createLoopback({
  service: 'gmail',
  store: tokenStore,
  logger,
  auth: authProvider
});
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Logging helper

Use sanitizeForLoggingFormatter to avoid leaking secrets in logs.

Requirements

• Node.js >= 22