Model Context Protocol server for the Polish GUS REGON business register (BIR1 API).
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add regon-polish-business-register --env REGON_API_KEY='<REGON_API_KEY>' -- uvx regon-mcp~/.codex/config.toml
[mcp_servers.regon-polish-business-register]
command = "uvx"
args = ["regon-mcp"]
env = { REGON_API_KEY = "<REGON_API_KEY>" }
# codex mcp add regon-polish-business-register --env REGON_API_KEY='<REGON_API_KEY>' -- uvx regon-mcp~/.cursor/mcp.json
{
"mcpServers": {
"regon-polish-business-register": {
"command": "uvx",
"args": [
"regon-mcp"
],
"env": {
"REGON_API_KEY": "<REGON_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"regon-polish-business-register": {
"type": "stdio",
"command": "uvx",
"args": [
"regon-mcp"
],
"env": {
"REGON_API_KEY": "<REGON_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"regon-polish-business-register": {
"command": "uvx",
"args": [
"regon-mcp"
],
"env": {
"REGON_API_KEY": "<REGON_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"regon-polish-business-register": {
"command": "uvx",
"args": [
"regon-mcp"
],
"env": {
"REGON_API_KEY": "<REGON_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"regon-polish-business-register": {
"command": "uvx",
"args": [
"regon-mcp"
],
"env": {
"REGON_API_KEY": "<REGON_API_KEY>"
}
}
}
}Environment variables
REGON_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.