Greencalculus MCP Server
com.greencalculus/apiv1.0.4
Sourced carbon emission factors + audit-traced calculations an AI can cite.
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Active24d ago
Install Greencalculus MCP server
Install in Claude Code
claude mcp add com-greencalculus-api -e GREENCALCULUS_API_KEY='<greencalculus-api-key>' -- npx -y greencalculus-mcpInstall in Cursor
{
"mcpServers": {
"com-greencalculus-api": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<greencalculus-api-key>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"com-greencalculus-api": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<greencalculus-api-key>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"com-greencalculus-api": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<greencalculus-api-key>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"com-greencalculus-api": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<greencalculus-api-key>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| GREENCALCULUS_API_KEY | — | yes | GreenCalculus API key — free at greencalculus.com/developers. Without one, search_factors and explain_absence still work; the other ten tools are refused. |
Remote endpoints
- streamable-http
https://mcp.greencalculus.com
Freshness
Active — last maintenance signal 24d ago. The newest of the signals below sets the band.
Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
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Registry entry updated
2026-09-16 · 24d ago · official registry · v1.0.4
FAQ
›How do I install the Greencalculus MCP server in Claude Code?
Run: claude mcp add com-greencalculus-api -e GREENCALCULUS_API_KEY='<greencalculus-api-key>' -- npx -y greencalculus-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Greencalculus require an API key?
Yes. It expects GREENCALCULUS_API_KEY, of which 1 is a secret.
›Can I use Greencalculus as a remote (hosted) MCP server?
Yes — it offers both a hosted endpoint and a local stdio package.
›Is Greencalculus in the official MCP registry?
Yes, as com.greencalculus/api.