day3 is listed as active in the registry but did not answer our last check. Last commit 29 Oct 2026.
Draft email campaigns in day3 from Claude Code, Cursor or VS Code as editable composer blocks.
What the code does
We read the source, 1 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
eval(script: string, numKeys: number, ...args: (string | number)[]): Promise<unknown>;
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.
claude mcp add day3 --transport http https://go.day3.app/api/mcphttps://go.day3.app/api/mcp[mcp_servers.day3]
url = "https://go.day3.app/api/mcp"{
"mcpServers": {
"day3": {
"url": "https://go.day3.app/api/mcp"
}
}
}{
"servers": {
"day3": {
"type": "http",
"url": "https://go.day3.app/api/mcp"
}
}
}Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://go.day3.app/api/mcp | streamable-http | answering | 86 ms | 8 min ago |
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day3 — questions
Answers built from our own checks of this server.