# Rattlesnakesbymail MCP server

Source: https://glimind.com/server/mcp-registry%2Fcom.rattlesnakesbymail%2Frattlesnakesbymail
Registry id: `mcp-registry/com.rattlesnakesbymail/rattlesnakesbymail`
Status: live (checked 2026-10-27T00:45:27.571Z)

## Verdict

Rattlesnakesbymail MCP server answered 100% of Glimind's liveness checks over 30 days, better than 42% of MCP servers, with 489 ms median handshake and 0 outages in 90 days. Its agent-readiness grade is A (95/100) across 6 tools, costing an agent about 1,038 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 100% | 42% of MCP servers |
| Median handshake latency | 489 ms | 50% of MCP servers |
| p95 handshake latency | 2644 ms | — |
| Checks in 30 days | 4,981 | — |
| Outages, 90 days | 0 | — |
| Median recovery | — | — |
| Agent-readiness score | 95/100 (A) | 80% of MCP servers |
| Tools | 6 | — |
| Tool-list size for an agent | ~1,038 tokens | 72% of MCP servers |
| Days observed | 29 | — |

## Install

```json
{
  "mcpServers": {
    "rattlesnakesbymail-mcp-server": {
      "type": "http",
      "url": "https://rattlesnakesbymail.com/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http rattlesnakesbymail-mcp-server https://rattlesnakesbymail.com/mcp
```

## Tools (6)

- `ask`: Match a free-text question against the claims published on Rattlesnakes By Mail, and return the matching claims, or no match when no published claim covers the 
- `get_snapshot`: Return the daily snapshot of crawler activity on Rattlesnakes By Mail for one UTC date: dated facts, a table of crawler requests, context against each crawler's
- `identify_user_agent`: Match an unrecognized raw User-Agent header against the crawlers documented on Rattlesnakes By Mail, and return the matched crawler plus instructions for verify
- `list_changes`: List recorded changes to claims on Rattlesnakes By Mail, newest first, with the change date and the affected crawler. Filter by date with since, by crawler with
- `lookup_crawler`: Look up a documented crawler on Rattlesnakes By Mail by name, slug, or user-agent string, and return identity fields, current claims, publication dates, and evi
- `submit_note`: Submit a correction or note about a claim, an entity, a question, or a daily snapshot on Rattlesnakes By Mail. Requires a client token issued out of band by the

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.