AI-ready design toolkit: color palettes, typography, spacing, shadows and accessibility audits.
Connect Runs on your machine
claude mcp add ensemble -e ENSEMBLE_API_KEY=<ENSEMBLE_API_KEY> -- npx -y @hearthbyte/[email protected]
{
"mcpServers": {
"ensemble": {
"command": "npx",
"args": [
"-y",
"@hearthbyte/[email protected]"
],
"env": {
"ENSEMBLE_API_KEY": "<ENSEMBLE_API_KEY>"
}
}
}
}
{
"mcpServers": {
"ensemble": {
"command": "npx",
"args": [
"-y",
"@hearthbyte/[email protected]"
],
"env": {
"ENSEMBLE_API_KEY": "<ENSEMBLE_API_KEY>"
}
}
}
}
{
"servers": {
"ensemble": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@hearthbyte/[email protected]"
],
"env": {
"ENSEMBLE_API_KEY": "<ENSEMBLE_API_KEY>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
ENSEMBLE_API_KEYOptional, secret | Ensemble Pro API key (hearthbyte.dev/ensemble/pricing). Without it only the free a11y_validate tool works. |
Details
| Package | @hearthbyte/[email protected] (NPM, stdio) |
| First published | 10 Oct 2026 |
| Last updated | 10 Oct 2026 |
| Registry name | dev.hearthbyte/ensemble |
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