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Explorer/MCP/flujo-app/mcp-gmail-oauth
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mcp-gmail-oauth

flujo-app/mcp-gmail-oauth

A self-hostable Gmail MCP server that enables Gmail search/read, sending, replies, drafts, labels, and attachment downloads via MCP tools with OAuth authorization. Supports stdio and streamable HTTP transports.

↗flujo-app/mcp-gmail-oauthExternal link; availability not verifiedLicenseMIT LicenseHybrid hosting
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Time indexed (2mo)
0toolsHybrid2moindexed
Checked Aug 4, 2026
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First indexed Aug 4, 2026
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Hosting
Hybrid
Can run locally or remotely depending on deployment. Review the source repository.
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Source repository is available for review.
↗flujo-app/mcp-gmail-oauthExternal link; availability not verified
Environment variables (19)
MCP_GMAIL_LISTENstringOPTIONALdefault: 127.0.0.1:3000
HTTP listener address in host:port format.
MCP_GMAIL_DB_PATHstringOPTIONALdefault: ~/.mcp-gmail-oauth/mcp-gmail-oauth.sqlite
Path to the SQLite database file.
MCP_GMAIL_LOG_LEVELstringOPTIONALdefault: info
Log level: debug, info, warn, error.
MCP_GMAIL_TRANSPORTstringOPTIONALdefault: stdio
Transport mode: 'stdio', 'http', or 'remote' (alias for 'http').
MCP_GMAIL_ALLOWED_HOSTSstringOPTIONAL
Comma-separated list of additional allowed hostnames.
Show all 19 environment variables
MCP_GMAIL_LOCAL_USER_IDstringOPTIONALdefault: local
Local user identity for stdio mode.
GOOGLE_OAUTH_CLIENT_FILEstringREQUIRED
Path to the Google OAuth client JSON file. Required for both stdio and HTTP modes.
MCP_GMAIL_ENCRYPTION_KEYstringOPTIONAL
32-byte base64url or 64-hex secret for encrypting Google tokens. Required for HTTP with non-loopback public base URL.
MCP_GMAIL_PUBLIC_BASE_URLstringOPTIONAL
External origin URL (e.g., https://gmail-mcp.example.com). Required for HTTP/remote mode, defaults to derived listener origin.
MCP_GMAIL_ALLOW_INSECURE_HTTPstringOPTIONALdefault: false
Set to 'true' to allow loopback HTTP in development (only localhost, 127.0.0.1, ::1).
MCP_GMAIL_OAUTH_MAX_CONCURRENTstringOPTIONALdefault: 128
Maximum in-flight requests total.
MCP_GMAIL_OAUTH_TRUSTED_PROXY_HOPSstringOPTIONALdefault: 0
Number of trusted proxy hops for client IP detection.
MCP_GMAIL_OAUTH_DYNAMIC_CLIENT_LIMITstringOPTIONALdefault: 1000
Maximum number of unverified dynamic clients stored.
MCP_GMAIL_OAUTH_MAX_CONCURRENT_PER_IPstringOPTIONALdefault: 8
Maximum in-flight requests per IP.
MCP_GMAIL_OAUTH_RATE_LIMIT_PER_MINUTEstringOPTIONALdefault: 120
OAuth requests per IP per minute.
MCP_GMAIL_OAUTH_DCR_RATE_LIMIT_PER_HOURstringOPTIONALdefault: 10
DCR requests per IP per hour.
MCP_GMAIL_OAUTH_DYNAMIC_CLIENT_MAX_IDLE_DAYSstringOPTIONALdefault: 30
Inactive DCR client pruning age in days.
MCP_GMAIL_OAUTH_GLOBAL_RATE_LIMIT_PER_MINUTEstringOPTIONALdefault: 10000
OAuth requests total per minute.
MCP_GMAIL_OAUTH_GLOBAL_DCR_RATE_LIMIT_PER_HOURstringOPTIONALdefault: 100
DCR requests total per hour.

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