Email inboxes for AI agents: create an address, wait for codes and links, send and reply in threads.
Connect Remote server
claude mcp add --transport http send0 https://api.send0.dev/mcp --header "Authorization: Bearer <YOUR_API_KEY>" --header "x-send0-inbox: <X_SEND0_INBOX>"{
"mcpServers": {
"send0": {
"url": "https://api.send0.dev/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>",
"x-send0-inbox": "<X_SEND0_INBOX>"
}
}
}
}{
"servers": {
"send0": {
"type": "http",
"url": "https://api.send0.dev/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>",
"x-send0-inbox": "<X_SEND0_INBOX>"
}
}
}
}Settings > Connectors > Add custom connector
URL: https://api.send0.dev/mcpReplace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server asks for a key before it lists its tools. Connect it with your own key to see them.
Headers
| Name | Description |
|---|---|
AuthorizationRequired, secret | Your send0 API key as a Bearer token |
x-send0-inboxOptional | Default inbox (ibx_…) for tools that take an inbox_id |
Details
| Endpoint | https://api.send0.dev/mcp (Streamable HTTP) |
| Package | @send0/[email protected] (NPM, stdio) |
| First published | 13 Oct 2026 |
| Last updated | 13 Oct 2026 |
| Registry name | io.github.send0-dev/send0 |
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