Is io.github.iancollins27/mailsnail safe to use?

io.github.iancollins27/mailsnail has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.

How do I install io.github.iancollins27/mailsnail?

io.github.iancollins27/mailsnail supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.iancollins27/mailsnail do?

io.github.iancollins27/mailsnail provides 3 tools: Packages, Safety, Status. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.iancollins27/mailsnail?

io.github.iancollins27/mailsnail is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.

Is io.github.iancollins27/mailsnail actively maintained?

io.github.iancollins27/mailsnail is actively maintained - last commit was 1 day ago.

io.github.iancollins27/mailsnail

mailsnail

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

56/wk 3 tools GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 1d ago

Works with most clients

Transport: stdio, sse

3 tools · ~159 tok

Grade A · 0.1% of 200K ctx

MCPpedia last refreshed this data 1d ago

Edit this pageView history

io.github.iancollins27/mailsnail is an MCP server that send USPS letters & certified mail from any agent. Hosted: sign in, no install. Its tool list has not been published yet over stdio and sse, requires no API key, and scores 87/100 on MCPpedia's security, maintenance and efficiency rubric.

Communication

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-iancollins27-mailsnail": {
      "args": [
        "-y",
        "mailsnail"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

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[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-iancollins27-mailsnail)](https://mcppedia.org/s/io-github-iancollins27-mailsnail)

Read me

What io.github.iancollins27/mailsnail does

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

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

87/100across 5 weighted dimensions

How we score →

0255075100

−13

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked mailsnail against OSV.dev.

Inventory

Tools (3)

Click any tool to inspect its schema.

~159 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.iancollins27/mailsnail safe to use?: io.github.iancollins27/mailsnail has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.iancollins27/mailsnail?: io.github.iancollins27/mailsnail supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.iancollins27/mailsnail do?: io.github.iancollins27/mailsnail provides 3 tools: Packages, Safety, Status. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.iancollins27/mailsnail?: io.github.iancollins27/mailsnail is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.
Is io.github.iancollins27/mailsnail actively maintained?: io.github.iancollins27/mailsnail is actively maintained - last commit was 1 day ago.

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Community

Discussion

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Edit this pageView history

Communication

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-iancollins27-mailsnail": {
      "args": [
        "-y",
        "mailsnail"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-iancollins27-mailsnail)](https://mcppedia.org/s/io-github-iancollins27-mailsnail)

Read me

What io.github.iancollins27/mailsnail does

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

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

README

Mailsnail

Open-source, provider-agnostic physical mail for AI agents.

Agents have every channel except one. They can email, text, call, and post to every feed — but until now, putting a real, postmarked envelope in a mailbox meant a human signing up for a print-provider account, provisioning API keys, and wiring billing. Mailsnail closes that gap:

Nothing to install. Add one URL to Claude, ChatGPT, Cursor or any MCP client and sign in. Pay for one letter by card or fund a balance, priced at our cost: from $1.21 first-class and $8.61 certified, no subscription. Agents that can mint a Stripe Shared Payment Token can also pay per piece with no account, over the Machine Payments Protocol (HTTP 402).
No lock-in, ever. The provider layer is open and swappable: bring your own Click2Mail or Lob account, self-host the whole gateway, or chain providers for failover. The managed service is a convenience, not a cage.
Built for compliance mail. Certified letters with extra_service: "certified" — the mail that legally must be physical (preliminary lien notices, legal notices) and must not miss its deadline because one print API had a bad day.

claude mcp add -t http mailsnail https://api.mailsnail.dev/mcp
# then /mcp → mailsnail → Authenticate, and: "Mail a thank-you letter to my aunt."

In Claude Desktop or ChatGPT, add https://api.mailsnail.dev/mcp as a custom connector. Steps for every app: mailsnail.dev/setup. Running your own Click2Mail or Lob account instead? See Ways to run it.

Hosted connector and plugins

The quickest start needs no install. Add https://api.mailsnail.dev/mcp as a custom connector in Claude, ChatGPT, Cursor or any MCP client that supports remote servers, then sign in. Each app's setup steps are at mailsnail.dev/setup.

plugins/mailsnail packages that connector with skills for sending letters, sending certified mail and tracking mail. It works in Claude (chat, Cowork and Claude Code) and in Cursor. To install it in Claude Code:

/plugin marketplace add iancollins27/mailsnail
/plugin install mailsnail@mailsnail

Packages

Package	What it is
`mailsnail`	MCP server — 11 tools (`doctor`, `verify_address`, `preview_letter`, `send_letter`, `send_postcard`, `get_balance`, `top_up`, `get_letter`, `get_postcard`, `list_letters`, `cancel_letter`) over any provider below. Works in Claude Code, Claude Desktop, Cursor, Codex CLI, OpenAI Agents SDK.
`@mailsnail/core`	Provider-agnostic core: adapters (Click2Mail, Lob, any Mailsnail gateway), multi-provider failover router, request validation. Zero dependencies.
`@mailsnail/gateway`	Self-hostable REST API: BYO provider credentials, `body_text`→PDF rendering, proofs, invocation logging. The managed service at `api.mailsnail.dev` runs the same wire protocol.
`spec/`	The provider-neutral mail-piece schema + the failover-safety contract. Implement it and anything — including a print shop — becomes a Mailsnail-compatible node.

Ways to run it

Mode	Credentials	Paying	Good for
hosted connector (`api.mailsnail.dev/mcp`)	none; you sign in	you, per letter by card or from a balance	people in Claude, ChatGPT, Cursor; zero-setup
managed (stdio default)	none	agent, per piece (Stripe SPT)	agents that can mint an SPT
gateway	your own, on your server	your provider account	teams; PII stays in your infra
click2mail / lob (BYOK)	yours, local env	your provider account	direct contro

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

87/100across 5 weighted dimensions

How we score →

0255075100

−13

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked mailsnail against OSV.dev.

Inventory

Tools (3)

Click any tool to inspect its schema.

~159 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.iancollins27/mailsnail safe to use?: io.github.iancollins27/mailsnail has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.iancollins27/mailsnail?: io.github.iancollins27/mailsnail supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.iancollins27/mailsnail do?: io.github.iancollins27/mailsnail provides 3 tools: Packages, Safety, Status. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.iancollins27/mailsnail?: io.github.iancollins27/mailsnail is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.
Is io.github.iancollins27/mailsnail actively maintained?: io.github.iancollins27/mailsnail is actively maintained - last commit was 1 day ago.

Similar servers

Others in communication

View all →

io.github.team-telnyx/telnyx95

Official TypeScript library for the Telnyx API

198 8

Textbee92

Open-source SMS gateway. Turn your Android phone into an SMS API: send and receive SMS from your apps over REST and webhooks. Self-hostable, with a free hosted plan.

3.4k 3

app.mailtea/mailtea92

Send email and newsletters with Mailtea over MCP, plus skills for email and website design.

io.github.labaccessnow/secops-field-notes-mcp92

CVSS scoring, IOC extraction, email header triage, hash/JWT/timestamp decoding, CISA KEV lookup.

MCP Security Weekly

Get CVE alerts and security updates for io.github.iancollins27/mailsnail and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?