Sourced carbon emission factors + audit-traced calculations an AI can cite.
Setup
Choose your client, copy the config, then fill in any required environment variables.
Local
claude mcp add api-greencalculus --env GREENCALCULUS_API_KEY='<GREENCALCULUS_API_KEY>' -- npx -y greencalculus-mcp~/.codex/config.toml
[mcp_servers.api-greencalculus]
command = "npx"
args = ["-y", "greencalculus-mcp"]
env = { GREENCALCULUS_API_KEY = "<GREENCALCULUS_API_KEY>" }
# codex mcp add api-greencalculus --env GREENCALCULUS_API_KEY='<GREENCALCULUS_API_KEY>' -- npx -y greencalculus-mcp~/.cursor/mcp.json
{
"mcpServers": {
"api-greencalculus": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<GREENCALCULUS_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"api-greencalculus": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<GREENCALCULUS_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"api-greencalculus": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<GREENCALCULUS_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"api-greencalculus": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<GREENCALCULUS_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"api-greencalculus": {
"command": "npx",
"args": [
"-y",
"greencalculus-mcp"
],
"env": {
"GREENCALCULUS_API_KEY": "<GREENCALCULUS_API_KEY>"
}
}
}
}Remote
claude mcp add --transport http api-greencalculus https://mcp.greencalculus.com --header 'Authorization: <AUTHORIZATION>'~/.codex/config.toml
[mcp_servers.api-greencalculus]
url = "https://mcp.greencalculus.com"
http_headers = { Authorization = "<AUTHORIZATION>" }
# codex mcp add api-greencalculus --url https://mcp.greencalculus.com~/.cursor/mcp.json
{
"mcpServers": {
"api-greencalculus": {
"url": "https://mcp.greencalculus.com",
"headers": {
"Authorization": "<AUTHORIZATION>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"api-greencalculus": {
"type": "http",
"url": "https://mcp.greencalculus.com",
"headers": {
"Authorization": "<AUTHORIZATION>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"api-greencalculus": {
"httpUrl": "https://mcp.greencalculus.com",
"headers": {
"Authorization": "<AUTHORIZATION>"
}
}
}
}claude_desktop_config.json · Customize › Connectors › Add custom connector
{
"mcpServers": {
"api-greencalculus": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://mcp.greencalculus.com",
"--header",
"Authorization:<AUTHORIZATION>"
]
}
}
}.trae/mcp.json
{
"mcpServers": {
"api-greencalculus": {
"url": "https://mcp.greencalculus.com",
"headers": {
"Authorization": "<AUTHORIZATION>"
}
}
}
}Environment variables
GREENCALCULUS_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.