diff --git a/src/index.tsx b/src/index.tsx
index d4db115..ca86285 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -36,7 +36,7 @@ interface Props {
 }
 
 const uri =
-  'https://proximiio-map-mobile.ams3.cdn.digitaloceanspaces.com/1.0.0-b17/index.html';
+  'https://proximiio-map-mobile.ams3.cdn.digitaloceanspaces.com/1.0.0-b18/index.html';
 
 export interface Feature {
   id: string;
@@ -96,8 +96,117 @@ enum Action {
   addImage = 'addImage',
   hasImage = 'hasImage',
   removeImage = 'removeImage',
+  addSource = 'addSource',
+  getSource = 'getSource',
+  hasSource = 'hasSource',
+  removeSource = 'removeSource',
 }
 
+export type PromoteIdSpecification =
+  | {
+      [_: string]: string;
+    }
+  | string;
+
+export type VectorSourceSpecification = {
+  type: 'vector';
+  url?: string;
+  tiles?: Array<string>;
+  bounds?: [number, number, number, number];
+  scheme?: 'xyz' | 'tms';
+  minzoom?: number;
+  maxzoom?: number;
+  attribution?: string;
+  promoteId?: PromoteIdSpecification;
+  volatile?: boolean;
+};
+
+export type RasterSourceSpecification = {
+  type: 'raster';
+  url?: string;
+  tiles?: Array<string>;
+  bounds?: [number, number, number, number];
+  minzoom?: number;
+  maxzoom?: number;
+  tileSize?: number;
+  scheme?: 'xyz' | 'tms';
+  attribution?: string;
+  volatile?: boolean;
+};
+
+export type RasterDEMSourceSpecification = {
+  type: 'raster-dem';
+  url?: string;
+  tiles?: Array<string>;
+  bounds?: [number, number, number, number];
+  minzoom?: number;
+  maxzoom?: number;
+  tileSize?: number;
+  attribution?: string;
+  encoding?: 'terrarium' | 'mapbox' | 'custom';
+  redFactor?: number;
+  blueFactor?: number;
+  greenFactor?: number;
+  baseShift?: number;
+  volatile?: boolean;
+};
+
+export type GeoJSONSourceSpecification = {
+  type: 'geojson';
+  data: GeoJSON.GeoJSON | string;
+  maxzoom?: number;
+  attribution?: string;
+  buffer?: number;
+  filter?: unknown;
+  tolerance?: number;
+  cluster?: boolean;
+  clusterRadius?: number;
+  clusterMaxZoom?: number;
+  clusterMinPoints?: number;
+  clusterProperties?: unknown;
+  lineMetrics?: boolean;
+  generateId?: boolean;
+  promoteId?: PromoteIdSpecification;
+};
+
+export type VideoSourceSpecification = {
+  type: 'video';
+  urls: Array<string>;
+  coordinates: [
+    [number, number],
+    [number, number],
+    [number, number],
+    [number, number],
+  ];
+};
+
+export type ImageSourceSpecification = {
+  type: 'image';
+  url: string;
+  coordinates: [
+    [number, number],
+    [number, number],
+    [number, number],
+    [number, number],
+  ];
+};
+
+export type SourceSpecification =
+  | VectorSourceSpecification
+  | RasterSourceSpecification
+  | RasterDEMSourceSpecification
+  | GeoJSONSourceSpecification
+  | VideoSourceSpecification
+  | ImageSourceSpecification;
+
+export type SourceInfo = {
+  id?: string;
+  type?: 'geojson' | 'vector' | 'raster' | 'raster-dem' | 'video' | 'image';
+  minzoom?: number;
+  maxzoom?: number;
+  loaded: boolean;
+};
+
 export function metersToSteps(meters: number) {
   return Math.round(meters * 1.31234);
 }
@@ -123,6 +232,27 @@ export class ProximiioMap extends Component<Props> {
     return result as boolean;
   }
 
+  async addSource(id: string, source: SourceSpecification): Promise<boolean> {
+    const params = `'${id}', '${JSON.stringify(source)}'`;
+    const result = await this.asyncTask(Action.addSource, params);
+    return result as boolean;
+  }
+
+  async getSource(id: string): Promise<SourceInfo | undefined> {
+    const result = await this.asyncTask(Action.getSource, `'${id}'`);
+    return result as SourceInfo | undefined;
+  }
+
+  async hasSource(id: string): Promise<boolean> {
+    const result = await this.asyncTask(Action.hasSource, `'${id}'`);
+    return result as boolean;
+  }
+
+  async removeSource(id: string): Promise<boolean> {
+    const result = await this.asyncTask(Action.removeSource, `'${id}'`);
+    return result as boolean;
+  }
+
   setCenter(lat: number, lng: number) {
     this.dispatch(`mapController.setCenter(${lat}, ${lng});`);
   }