Billy (billy.dk) accounting: invoices, journal entries, trial balance, with write protection.
Connect Runs on your machine
claude mcp add billy-mcp -e BILLY_ACCESS_TOKEN=<BILLY_ACCESS_TOKEN> -e BILLY_WRITE_MODE=<BILLY_WRITE_MODE> -e BILLY_ORGANIZATION_ID=<BILLY_ORGANIZATION_ID> -e BILLY_LOCALE=<BILLY_LOCALE> -- npx -y [email protected]{
"mcpServers": {
"billy-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"BILLY_ACCESS_TOKEN": "<BILLY_ACCESS_TOKEN>",
"BILLY_WRITE_MODE": "<BILLY_WRITE_MODE>",
"BILLY_ORGANIZATION_ID": "<BILLY_ORGANIZATION_ID>",
"BILLY_LOCALE": "<BILLY_LOCALE>"
}
}
}
}{
"mcpServers": {
"billy-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"BILLY_ACCESS_TOKEN": "<BILLY_ACCESS_TOKEN>",
"BILLY_WRITE_MODE": "<BILLY_WRITE_MODE>",
"BILLY_ORGANIZATION_ID": "<BILLY_ORGANIZATION_ID>",
"BILLY_LOCALE": "<BILLY_LOCALE>"
}
}
}
}{
"servers": {
"billy-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"BILLY_ACCESS_TOKEN": "<BILLY_ACCESS_TOKEN>",
"BILLY_WRITE_MODE": "<BILLY_WRITE_MODE>",
"BILLY_ORGANIZATION_ID": "<BILLY_ORGANIZATION_ID>",
"BILLY_LOCALE": "<BILLY_LOCALE>"
}
}
}
}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 |
|---|---|
BILLY_ACCESS_TOKENRequired, secret | Billy API access token (create at mit.billy.dk -> Settings -> Access tokens) |
BILLY_WRITE_MODEOptional | Write protection: read-only, confirm (default, requires elicitation-capable host), or full |
BILLY_ORGANIZATION_IDOptional | Billy organization ID (auto-resolved when the token maps to a single company) |
BILLY_LOCALEOptional | Response language: en_US, da_DK, fr_FR, nl_NL, or de_DE |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 10 Jul 2026 |
| Last updated | 10 Jul 2026 |
| Registry name | io.github.Thourum/billy-mcp |
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