cypht-mcp Cloudflare Worker

Cloudflare Worker implementation of the Cypht email MCP. It preserves the eight email tools from the Docker service while moving MCP transport to the Worker runtime and storing encrypted account records in a Durable Object.

Runtime

• Worker: cypht-mcp

• Endpoint: https://cypht-mcp.rg1.workers.dev/mcp

• Mail host: smtp.rg1.in (public IMAPS 993 and SMTP submission 587)

• State: CyphtState Durable Object

• Secrets: MCP_BEARER, ACCOUNT_STORE_KEY

• Transport: Streamable HTTP

The Worker cannot use the Docker-only hostname mailserver-email-1; the mail server must remain reachable at the configured public hostname. Mail host validation prevents arbitrary outbound host connections.

Related MCP server: Cloudflare Email MCP

Tools

add_account, set_profile, list_accounts, send_email, list_emails, view_email, search_emails, and delete_email are registered with the same names and core arguments as the Docker implementation. search_emails is implemented as an IMAP subject/from search.

Mailbox passwords are encrypted with AES-GCM before Durable Object storage and are never returned by tools. delete_email performs an irreversible IMAP EXPUNGE.

Deploy

Deployment is owned by mcp-ops: create a dev/* branch, open and merge a PR, then verify the Workers Build and authenticated MCP smoke. Do not run local Wrangler deployment from the skill tree.