Email A/B tests for AI agents: subject lines, managed sends, open/click tracking, and results.
Connect Remote server
claude mcp add --transport http mcp https://marginal.sh/mcp --header "Authorization: Bearer <YOUR_API_KEY>"
{
"mcpServers": {
"mcp": {
"url": "https://marginal.sh/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}
{
"servers": {
"mcp": {
"type": "http",
"url": "https://marginal.sh/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}
Settings > Connectors > Add custom connector
URL: https://marginal.sh/mcp
Replace 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 | Bearer token with your marginal API key from https://marginal.sh/dashboard |
Details
| Endpoint | https://marginal.sh/mcp (Streamable HTTP) |
| First published | 24 Jun 2026 |
| Last updated | 24 Jun 2026 |
| Registry name | sh.marginal/mcp |
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