Circulara Observe MCP plugin - meters your AI agents' token spend and carbon, free tier.
Connect Runs on your machine
claude mcp add plugin -e CIRCULARA_BACKEND_URL=<CIRCULARA_BACKEND_URL> -e CIRCULARA_TENANT_ID=<CIRCULARA_TENANT_ID> -e CIRCULARA_TOKEN=<CIRCULARA_TOKEN> -e CIRCULARA_SEAT_ID=<CIRCULARA_SEAT_ID> -e CIRCULARA_USER_ID=<CIRCULARA_USER_ID> -- npx -y @circulara/[email protected]{
"mcpServers": {
"plugin": {
"command": "npx",
"args": [
"-y",
"@circulara/[email protected]"
],
"env": {
"CIRCULARA_BACKEND_URL": "<CIRCULARA_BACKEND_URL>",
"CIRCULARA_TENANT_ID": "<CIRCULARA_TENANT_ID>",
"CIRCULARA_TOKEN": "<CIRCULARA_TOKEN>",
"CIRCULARA_SEAT_ID": "<CIRCULARA_SEAT_ID>",
"CIRCULARA_USER_ID": "<CIRCULARA_USER_ID>"
}
}
}
}{
"mcpServers": {
"plugin": {
"command": "npx",
"args": [
"-y",
"@circulara/[email protected]"
],
"env": {
"CIRCULARA_BACKEND_URL": "<CIRCULARA_BACKEND_URL>",
"CIRCULARA_TENANT_ID": "<CIRCULARA_TENANT_ID>",
"CIRCULARA_TOKEN": "<CIRCULARA_TOKEN>",
"CIRCULARA_SEAT_ID": "<CIRCULARA_SEAT_ID>",
"CIRCULARA_USER_ID": "<CIRCULARA_USER_ID>"
}
}
}
}{
"servers": {
"plugin": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@circulara/[email protected]"
],
"env": {
"CIRCULARA_BACKEND_URL": "<CIRCULARA_BACKEND_URL>",
"CIRCULARA_TENANT_ID": "<CIRCULARA_TENANT_ID>",
"CIRCULARA_TOKEN": "<CIRCULARA_TOKEN>",
"CIRCULARA_SEAT_ID": "<CIRCULARA_SEAT_ID>",
"CIRCULARA_USER_ID": "<CIRCULARA_USER_ID>"
}
}
}
}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 |
|---|---|
CIRCULARA_BACKEND_URLRequired | Your Circulara Observe backend URL - copy from the Connect page after signing in at https://plugin.circulara.ai |
CIRCULARA_TENANT_IDRequired | Your workspace ID - from the Connect page |
CIRCULARA_TOKENRequired, secret | Your signed workspace token - from the Connect page (keep secret) |
CIRCULARA_SEAT_IDRequired | Your seat ID - from the Connect page |
CIRCULARA_USER_IDRequired | Your email / identity - from the Connect page |
Details
| Package | @circulara/[email protected] (NPM, stdio) |
| First published | 9 Jul 2026 |
| Last updated | 9 Jul 2026 |
| Registry name | ai.circulara/plugin |
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