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Mailsnail MCP Server

by Iancollins27
Developer ToolsLow Risk9.7MCP RegistryLocalRemote
Free

Server data from the Official MCP Registry

Send USPS letters & certified mail from any agent. Hosted: sign in, no install.

About

Send USPS letters & certified mail from any agent. Hosted: sign in, no install.

Remote endpoints: streamable-http: https://api.mailsnail.dev/mcp

Security Report

9.7
Low Risk9.7Low Risk

Valid MCP server (2 strong, 4 medium validity signals). No known CVEs in dependencies. ⚠️ Package registry links to a different repository than scanned source. Imported from the Official MCP Registry. 1 finding(s) downgraded by scanner intelligence.

Endpoint verified · Requires authentication · 2 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

env_vars

Check that this permission is expected for this type of plugin.

file_system

Check that this permission is expected for this type of plugin.

database

Check that this permission is expected for this type of plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

What You'll Need

Set these up before or after installing:

For self-hosting only; most people should add the hosted URL instead. 'click2mail' (your own account) or 'lob' (your own key). 'managed' needs a Stripe Shared Payment Token that most AI apps can't create.Optional

Environment variable: MAIL_PROVIDER

Hosted Mailsnail backend. Required when MAIL_PROVIDER=managed.Optional

Environment variable: MAIL_API_BASE_URL

Click2Mail account username. Required when MAIL_PROVIDER=click2mail.Optional

Environment variable: CLICK2MAIL_USERNAME

Click2Mail account password. Required when MAIL_PROVIDER=click2mail.Required

Environment variable: CLICK2MAIL_PASSWORD

Lob API key. Required when MAIL_PROVIDER=lob. test_* is free; live_* actually mails.Required

Environment variable: LOB_API_KEY

Set to '1' to actually mail in BYOK modes. Default '0' is dry-run.Optional

Environment variable: MAIL_MCP_ALLOW_LIVE

Per-session estimated spend cap. Server refuses sends past this.Optional

Environment variable: MAIL_MCP_SPEND_CAP_USD

How to Install & Connect

Available as Local & Remote

This plugin can run on your machine or connect to a hosted endpoint. during install.

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