Norwegian Business Registry MCP Server

Instructions

Implementation Reference

• src/brreg-mcp-server.ts:87-89 (handler)

  The core handler function in BrregApiClient that fetches entity roles from the BRREG API by making an HTTP request to the specific endpoint.

  async getEntityRoles(orgNumber: string) {
    return this.makeRequest(`/enhetsregisteret/api/enheter/${orgNumber}/roller`);
  }

• src/brreg-mcp-server.ts:222-231 (registration)

  Tool registration in the ListToolsRequestSchema handler, defining the tool name, description, and input schema.

    name: "get_entity_roles",
    description: "Get all roles for a specific entity",
    inputSchema: {
      type: "object",
      properties: {
        organisasjonsnummer: { type: "string", description: "9-digit organization number" }
      },
      required: ["organisasjonsnummer"]
    }
  },

• src/brreg-mcp-server.ts:425-436 (handler)

  Dispatch handler in the CallToolRequestSchema that parses input arguments and invokes the BrregApiClient.getEntityRoles method, returning the JSON response.

  case "get_entity_roles":
    const { organisasjonsnummer: orgNum } = request.params.arguments as { organisasjonsnummer: string };
    const roles = await apiClient.getEntityRoles(orgNum);
    return {
      content: [
        {
          type: "text",
          text: JSON.stringify(roles, null, 2),
        },
      ],
    };

• src/brreg-mcp-server.ts:224-230 (schema)

  Input schema for validating the tool parameters.

  inputSchema: {
    type: "object",
    properties: {
      organisasjonsnummer: { type: "string", description: "9-digit organization number" }
    },
    required: ["organisasjonsnummer"]
  }