Unofficial MCP server for Karbon practice management: contacts, work, time, invoices, payments.
Connect Runs on your machine
claude mcp add karbon-mcp-server -e KARBON_BEARER_TOKEN=<KARBON_BEARER_TOKEN> -e KARBON_ACCESS_KEY=<KARBON_ACCESS_KEY> -e KARBON_READ_ONLY=<KARBON_READ_ONLY> -e KARBON_ALLOW_PAYMENT_WRITES=<KARBON_ALLOW_PAYMENT_WRITES> -- npx -y [email protected]{
"mcpServers": {
"karbon-mcp-server": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"KARBON_BEARER_TOKEN": "<KARBON_BEARER_TOKEN>",
"KARBON_ACCESS_KEY": "<KARBON_ACCESS_KEY>",
"KARBON_READ_ONLY": "<KARBON_READ_ONLY>",
"KARBON_ALLOW_PAYMENT_WRITES": "<KARBON_ALLOW_PAYMENT_WRITES>"
}
}
}
}{
"mcpServers": {
"karbon-mcp-server": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"KARBON_BEARER_TOKEN": "<KARBON_BEARER_TOKEN>",
"KARBON_ACCESS_KEY": "<KARBON_ACCESS_KEY>",
"KARBON_READ_ONLY": "<KARBON_READ_ONLY>",
"KARBON_ALLOW_PAYMENT_WRITES": "<KARBON_ALLOW_PAYMENT_WRITES>"
}
}
}
}{
"servers": {
"karbon-mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"KARBON_BEARER_TOKEN": "<KARBON_BEARER_TOKEN>",
"KARBON_ACCESS_KEY": "<KARBON_ACCESS_KEY>",
"KARBON_READ_ONLY": "<KARBON_READ_ONLY>",
"KARBON_ALLOW_PAYMENT_WRITES": "<KARBON_ALLOW_PAYMENT_WRITES>"
}
}
}
}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 |
|---|---|
KARBON_BEARER_TOKENRequired, secret | Bearer token (Application Authorization Token) from Karbon → Settings → Connected Apps → API Applications |
KARBON_ACCESS_KEYRequired, secret | Access key (JWT starting with 'ey') from Karbon → Settings → Connected Apps → API Applications |
KARBON_READ_ONLYOptional | Set to 'true' to disable all create/update tools (they are not registered at all) |
KARBON_ALLOW_PAYMENT_WRITESOptional | Set to 'true' to enable the payment write tools (create/delete/reverse manual payments); off by default |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 16 Jul 2026 |
| Last updated | 16 Jul 2026 |
| Registry name | io.github.Mad-Man-Dan/karbon-mcp-server |
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