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

io.github.iancollins27/mailsnail has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

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 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.

io.github.iancollins27/mailsnail

mailsnail

Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

GitHub npm

No known CVEs

No license

Maintenance unknown

No commit data

Works with most clients

Transport: stdio, sse

0 tools

Grade F

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

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

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y 'mailsnail' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

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

Score breakdown

22/100across 5 weighted dimensions

How we score →

0255075100

−78

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked mailsnail against OSV.dev.

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. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
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 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.

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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

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

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y 'mailsnail' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

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:

No signup in managed mode. Agents pay per piece via Stripe Shared Payment Tokens over the Machine Payments Protocol (HTTP 402). First letter can go out minutes after install. $1.50 first-class, $9.00 certified, $1.00 postcard — flat, no subscription.
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 mailsnail -- npx -y mailsnail
# then: "Send me a postcard that says hello."

Packages

Package	What it is
`mailsnail`	MCP server — 7 tools (`verify_address`, `preview_letter`, `send_letter`, `send_postcard`, `get_letter`, `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.

Four ways to run it

Mode	Credentials	Paying	Good for
managed (default)	none	agent, per piece (Stripe SPT)	agents; zero-setup
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 control, one provider
failover chain	yours, per provider	your provider accounts	mail that must not miss deadlines

Failover is deliberately conservative: a send moves to the next provider only when the failed provider guarantees nothing entered production and no money moved (safeToRetry — see the spec). A duplicate certified letter is worse than an error.

Safety

Dry-run by default everywhere; live mail requires an explicit MAIL_MCP_ALLOW_LIVE=1.
Per-session spend caps in the MCP server; auto-refund in managed mode when a paid piece fails to mail.
preview_letter returns a proof PDF and exact price before anything is charged — show it to your user first.
Don't use this for spam, harassment, or fraud. Provider terms and USPS regulations apply; managed mode enforces its own abuse screening.

Why open source

You're letting software put paper in mailboxes and spend money doing it. Read the code. Run it yourself with your own provider account for free. Use managed mode when you'd rather not hold credentials at all. If we ever disappoint you, MAIL_PROVIDER=click2mail and your mail keeps moving — that's the deal, and it's enforceable because this repo exists.

Status

Early. US-only today. Letters, c

... 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

22/100across 5 weighted dimensions

How we score →

0255075100

−78

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked mailsnail against OSV.dev.

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. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
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 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.