send0 is answering right now. Last checked 11 min ago. 412 installs a week from npm. Last commit 13 Oct 2026.
Email inboxes for AI agents: create an address, wait for codes and links, send and reply in threads.
We read the source, 1 d ago · rules ccca72095570
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.
const mod = (p) => path.join(root, "node_modules", p);
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
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.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.
claude mcp add send0 --transport http https://api.send0.dev/mcp
{
"mcpServers": {
"send0": {
"url": "https://api.send0.dev/mcp"
}
}
}
[mcp_servers.send0]
url = "https://api.send0.dev/mcp"
{
"mcpServers": {
"send0": {
"url": "https://api.send0.dev/mcp"
}
}
}
{
"mcpServers": {
"send0": {
"url": "https://api.send0.dev/mcp"
}
}
}
This one needs environment variables set before it will start:
SEND0_API_KEY (send0 API key (s0_live_…), from https://app.send0.dev), SEND0_INBOX_ID (Default inbox (ibx_…) for tools that take an inbox_id), SEND0_BASE_URL (API base URL, for a self-hosted send0).
The author declared them in the registry entry; get the values from the project itself.
This endpoint answered with an authorization challenge. The server is running, but you need an API key from its owner to call it.
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://api.send0.dev/mcp | streamable-http | needs key | 292 ms | 11 min ago |
Disposable email inboxes for AI agents: create an address, wait for mail, read OTP codes and links.
Real email inboxes for AI agents: create addresses, send, wait for mail and verification codes.
Disposable inboxes for AI agents: create an address, wait for the email, get the code or link.
Real email inboxes for AI agents: open an address, read the one-time code, send mail.
Real email for AI agents: domains, mailboxes, a unified inbox, wait-for-code, send and reply.
Disposable test inboxes for agents: create an address, then wait for its code or link.
Task-scoped email inboxes for AI agents: read mail, extract verification codes, and reply.
Email inboxes for AI agents: send, reply, read verification codes, human-approved drafts.
Answers built from our own checks of this server.