diff --git a/types/accedo__accedo-one/accedo__accedo-one-tests.ts b/types/accedo__accedo-one/accedo__accedo-one-tests.ts
new file mode 100644
index 0000000000..aaa9ce03e0
--- /dev/null
+++ b/types/accedo__accedo-one/accedo__accedo-one-tests.ts
@@ -0,0 +1,41 @@
+import accedoOne = require("@accedo/accedo-one");
+
+accedoOne(); // $ExpectError
+
+accedoOne({
+    appKey: 0, // $ExpectError
+});
+
+const accedo = accedoOne({
+    appKey: 'asf8ggtg0a63189cvbs1278jj354',
+});
+
+accedo.getEntries(''); // $ExpectError
+accedo.getEntries(0); // $ExpectError
+
+accedo.getEntryById(); // $ExpectError
+accedo.getEntryByAlias(); // $ExpectError
+accedo.sendLog(); // $ExpectError
+accedo.getMetadataByKey(); // $ExpectError
+accedo.getAllApplicationScopeDataByUser(); // $ExpectError
+accedo.getAllApplicationGroupScopeDataByUser(); // $ExpectError
+accedo.getApplicationScopeDataByUserAndKey(); // $ExpectError
+accedo.getApplicationScopeDataByUserAndKey('userName01'); // $ExpectError
+
+accedo.getApplicationGroupScopeDataByUserAndKey(); // $ExpectError
+accedo.getApplicationGroupScopeDataByUserAndKey('userName01'); // $ExpectError
+
+accedo.setApplicationScopeUserData(); // $ExpectError
+accedo.setApplicationScopeUserData('userName01'); // $ExpectError
+
+accedo.setApplicationGroupScopeUserData(); // $ExpectError
+accedo.setApplicationGroupScopeUserData('userName01'); // $ExpectError
+
+accedo.setApplicationScopeUserDataByKey(); // $ExpectError
+accedo.setApplicationScopeUserDataByKey('userName01'); // $ExpectError
+
+accedo.setApplicationGroupScopeUserDataByKey(); // $ExpectError
+accedo.setApplicationGroupScopeUserDataByKey('userName01'); // $ExpectError
+accedo.setApplicationGroupScopeUserDataByKey('userName01', 'key02'); // $ExpectError
+
+accedo.sendLogs(); // $ExpectError
diff --git a/types/accedo__accedo-one/index.d.ts b/types/accedo__accedo-one/index.d.ts
new file mode 100644
index 0000000000..70461ecd28
--- /dev/null
+++ b/types/accedo__accedo-one/index.d.ts
@@ -0,0 +1,407 @@
+// Type definitions for @accedo/accedo-one 4.0
+// Project: https://www.accedo.tv/one
+// Definitions by: Alexander P. Cerutti <https://github.com/alexandercerutti>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// Minimum TypeScript Version: 3.1
+
+/**
+ * @example
+ * ~ import accedoOne from "@accedo/accedo-one"; // ESM Syntax
+ * ~ import accedoOne = require("@accedo/accedo-one"); // CJS Syntax
+ * ~ const accedo = accedoOne({ ... });
+ * ~
+ * ~ accedo.getEntries(...);
+ *
+ * @param config
+ */
+
+export as namespace accedoOne;
+declare function accedoOne(config: AccedoConfig): AccedoClient;
+export = accedoOne;
+export {};
+
+declare class AccedoClient {
+    config: AccedoConfig;
+
+    /**
+     * Get all the content entries, based on the given parameters.
+     * DO NOT use several of the id, alias, typeId and typeAlias
+     * options at the same time - behaviour would be ungaranteed.
+     *
+     * @param params
+     */
+
+    getEntries(params?: AccedoEntryParams): Promise<any>;
+
+    /**
+     * Get one content entry by id, based on the given parameters.
+     *
+     * @param id
+     * @param params
+     */
+
+    getEntryById(id: string, params?: Pick<AccedoEntryParams, 'preview' | 'at' | 'locale'>): Promise<any>;
+
+    /**
+     * Get one content entry, based on the given parameters.
+     *
+     * @param alias
+     * @param params
+     */
+
+    getEntryByAlias<A>(alias: A, params?: Pick<AccedoEntryParams, 'preview' | 'at' | 'locale'>): Promise<A>;
+
+    /**
+     * Create a session and store it for reuse in this client instance.
+     * Note you do not usually need to worry about this. Other methods
+     * will call it automatically for you when it is needed.
+     *
+     * @returns a Promise of a string, the sessionKey
+     */
+
+    createSession(): Promise<string>;
+
+    /**
+     * Get the current log level
+     *
+     * @returns a promise of the log level (string)
+     */
+
+    getLogLevel(): Promise<AccedoLog.Level>;
+
+    /**
+     * NOTE: the behaviour varies when run on Node.js or on browsers.
+     *
+     * On Node.js, the log will be sent immediately.
+     * On browsers: add the log to a queue so several logs may be sent
+     * as a batch, when a predefined total size is reached or after a
+     * debouncing delay. Whenever the user navigates away, the SDK will
+     * also attempt to send any queued-up log.
+     *
+     * If the current log level is high enough, lower level logs will be ignored.
+     *
+     * @param level the log level
+     * @param details the log information
+     * @param metadata extra metadata (will go through JSON.stringify). Can be passed as any number of trailing arguments.
+     */
+
+    sendLog(level: AccedoLog.Level, details: Readonly<AccedoLog.Details>, metadata?: any): Promise<boolean>;
+
+    /**
+     * Returns the currently stored sessionKey for this client instance
+     *
+     * @returns string: the sessionKey, if any
+     */
+
+    getSessionKey(): string;
+
+    /**
+     * Get the current application status
+     *
+     * @returns A promise of the application status (string)
+     */
+
+    getApplicationStatus(): Promise<string>;
+
+    /**
+     * Lists all the assets.
+     *
+     * @returns A promise of a hash of assets (key: asset name, value: asset URL)
+     */
+
+    getAllAssets(): Promise<string>;
+
+    /**
+     * Send a usage START event
+     *
+     * @returns A promise denoting the success of the operation
+     */
+
+    sendUsageStartEvent(): Promise<boolean>;
+
+    /**
+     * Send a usage QUIT event
+     *
+     * @param retentionTimeInSeconds the retention time, in seconds
+     * @returns A promise denoting the success of the operation
+     */
+
+    sendUsageStopEvent(retentionTimeInSeconds?: number | string): Promise<boolean>;
+
+    /**
+     * Get all the enabled plugins
+     *
+     * @returns A promise of the requested data
+     */
+
+    getAllEnabledPlugins(): Promise<any>;
+
+    /**
+     * Get the profile information
+     *
+     * @returns A promise of the requested data
+     */
+
+    getProfileInfo(): Promise<AccedoProfile>;
+
+    /**
+     * Get all the metadata
+     *
+     * @returns A promise of the requested data
+     */
+
+    getAllMetadata(): Promise<any>;
+
+    /**
+     * Get the metadata by a specific key
+     *
+     * @param key a key to get specific metadata
+     * @returns a promise of the requested data
+     */
+
+    getMetadataByKey(key: string): Promise<any>;
+
+    /**
+     * Get the metadata by specific keys
+     *
+     * @param keys an array of keys (strings)
+     * @returns a promise of the requested data
+     */
+
+    getMetadataByKeys(keys: string[]): Promise<any>;
+
+    /**
+     * Get all the application-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @returns A promise of the requested data
+     */
+
+    getAllApplicationScopeDataByUser(userName: string): Promise<any>;
+
+    /**
+     * Get all the application-group-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @returns A promise of the requested data
+     */
+
+    getAllApplicationGroupScopeDataByUser(userName: string): Promise<any>;
+
+    /**
+     * Get all the application-scope data for a given user and data key
+     *
+     * @param userName an Accedo One user
+     * @param key a key to specify what data to obtain
+     */
+
+    getApplicationScopeDataByUserAndKey(userName: string, key: string): Promise<any>;
+
+    /**
+     * Get all the application-group-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @param key a key to specify what data to obtain
+     * @returns A promise of the requested data
+     */
+
+    getApplicationGroupScopeDataByUserAndKey(userName: string, key: string): Promise<any>;
+
+    /**
+     * Set the application-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @param data the data to store
+     * @returns A promise of the requested data
+     */
+
+    setApplicationScopeUserData<D extends object>(userName: string, data: D): Promise<D>;
+
+    /**
+     * Set the application-group-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @param data the data to store
+     * @returns A promise of the requested data
+     */
+
+    setApplicationGroupScopeUserData<D extends object>(userName: string, data: D): Promise<D>;
+
+    /**
+     * Set the application-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @param key a key to specify what data to obtain
+     * @param data the data to store
+     * @returns A promise of the requested data
+     */
+
+    setApplicationScopeUserDataByKey<D extends object>(userName: string, key: string, data: D): Promise<D>;
+
+    /**
+     * Set the application-group-scope data for a given user
+     *
+     * @param userName an Accedo One user
+     * @param key a key to specify what data to obtain
+     * @param data the data to store
+     * @returns A promise of the requested data
+     */
+
+    setApplicationGroupScopeUserDataByKey<D extends object>(userName: string, key: string, data: D): Promise<D>;
+
+    /**
+     * Get all the available locales
+     *
+     * @returns A promise of the requested data
+     */
+
+    getAvailableLocales(): Promise<{ locales: AccedoLocale[] }>;
+
+    /**
+     * Send batched logs, each with its own level, timestamp, details and extra metadata.
+     * Note that on browsers, the other method, sendLog, is more convenient as it will
+     * auto-batch logs for you.
+     *
+     * @param logs
+     * @returns A promise of the success of the operation
+     */
+
+    sendLogs(logs: ReadonlyArray<AccedoLog.Logobject>): Promise<boolean>;
+}
+
+declare namespace AccedoLog {
+    enum Level {
+        DEBUG = 'debug',
+        INFO = 'info',
+        WARN = 'warn',
+        ERROR = 'error',
+    }
+
+    interface Details {
+        /** The log message */
+        message: string;
+
+        /** The error code (max 5 digits) */
+        errorCode?: number;
+
+        /** The dimension 1 information */
+        dim1?: string;
+
+        /** The dimension 2 information */
+        dim2?: string;
+
+        /** The dimension 3 information */
+        dim3?: string;
+
+        /** The dimension 4 information */
+        dim4?: string;
+    }
+
+    interface Logobject extends Details {
+        /**
+         * the log type
+         */
+
+        logType: Level;
+
+        /**
+         * The timestamp for the log, as a UTC ISO 8601 string
+         * (ie. '2016-07-04T06:17:21Z'), or a POSIX millisecond
+         * number
+         */
+
+        timestamp: string | number;
+
+        /** Extra metadata (will go through JSON.stringify) */
+        metadata?: any;
+    }
+}
+
+interface AccedoEntryParams {
+    /** when true, get the preview version */
+    preview?: boolean;
+
+    /** when given, get the version at the given time */
+    at?: string | Date;
+
+    /** an array of entry ids (strings) */
+    id?: string[];
+
+    /** an array of entry aliases (strings) */
+    alias?: string[];
+
+    /** only return entries of the given type ids (strings) */
+    typeId?: string[];
+
+    /** only return entries whose entry type has this alias */
+    typeAlias?: string;
+
+    /**
+     * Limit to that many results per page (limits as per Accedo
+     * One API, currently 1 to 50, default 20)
+     */
+    size?: number | string;
+
+    /** Offset the result by that many pages */
+    offset?: number | string;
+
+    /**
+     * if available, get the version for the given locale
+     * (defaults to the default locale)
+     */
+
+    locale?: string;
+}
+
+interface AccedoProfile {
+    profileId: string;
+    profileName: string;
+    profileDescription: string;
+    profileLastModified: string;
+}
+
+interface AccedoConfig {
+    /**
+     * A function that should return an object with deviceId and
+     * sessionKey properties, saved from previous sessions (see
+     * onDeviceIdGenerated, onSessionKeyChanged)
+     */
+
+    browserInfoProvider?: () => {
+        deviceId: string;
+        sessionKey: string;
+    };
+
+    /** The application Key */
+    appKey: string;
+
+    /** The device identifier (if not provided, a uuid will be generated instead) */
+    deviceId?: string;
+
+    /** The sessionKey (note a new one may be created when not given or expired) */
+    sessionKey?: string;
+
+    /** the user's IP, given to Accedo One for every request this client will trigger (for geolocation). */
+    ip?: string;
+
+    /** A function to use to see this SDK's logs */
+    log?: (...args: any[]) => void;
+
+    /** Callback to obtain the new deviceId, if one gets generated */
+    onDeviceIdGenerated?: (deviceId: string) => void;
+
+    /** Callback to obtain the sessionKey, anytime a new one gets generated */
+    onSessionKeyChanged?: (sessionKey: string) => void;
+
+    /** All APIs calls will use this as the base API URL (defaults to the Accedo One API URL) */
+    target?: string;
+}
+
+interface AccedoLocale {
+    code: string;
+    displayName: string;
+    countryInfo: {
+        alpha2Code: string;
+        alpha3Code: string;
+    };
+}
diff --git a/types/accedo__accedo-one/tsconfig.json b/types/accedo__accedo-one/tsconfig.json
new file mode 100644
index 0000000000..cf9f87e2a9
--- /dev/null
+++ b/types/accedo__accedo-one/tsconfig.json
@@ -0,0 +1,28 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "paths": {
+            "@accedo/accedo-one": [
+                "accedo__accedo-one"
+            ]
+        },
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "accedo__accedo-one-tests.ts"
+    ]
+}
diff --git a/types/accedo__accedo-one/tslint.json b/types/accedo__accedo-one/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/accedo__accedo-one/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }