diff --git a/index.d.ts b/index.d.ts
index e69de29..edbe260 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -0,0 +1,324 @@
+export interface CollectionDocument {
+    id?: string
+    insertTime?: Date
+    updateTime?: Date
+    [key: string]: any
+}
+
+export interface ReadCollectionOptions {
+    filter?: {
+        [key: string]: any
+    }
+    selector?: {
+        [key: string]: any
+    }
+    projection?: string
+    offset?: number
+    limit?: number
+    sort?: string[]
+}
+
+interface GetHookData {
+    /**
+     * true if only one document was requested via /COLLECTION/ID
+     */
+    one?: boolean
+    /**
+     * get list of documents (only valid after stage "read" in "get" hook)
+     */
+    results(): CollectionDocument[]
+    /**
+     * filter map only valid for "get" hooks
+     */
+    filter?: {
+        [key: string]: any
+    }
+    /**
+     * selector map only valid for "get" hooks
+     */
+    selector?: {
+        [key: string]: any
+    }
+    /**
+     * offset only valid for "get" hooks
+     */
+    offset?: number
+    /**
+     * limit only valid for "get" hooks
+     */
+    limit?: number
+    /**
+     * sort only valid for "get" hooks
+     */
+    sort?: string[] | string
+}
+
+interface PostHookData {
+    /**
+     * post data only valid in "post" and "put" hooks
+     */
+    data?: CollectionDocument
+}
+
+export interface HookContext extends GetHookData, PostHookData {
+    request(): {
+        method: string
+        remoteAddr: string
+        host: string
+        url: string
+        path: string
+        param(p: string): string
+        query(q: string): string
+        header(h: string): string
+        body(): string
+        /**
+         * bodyBytes return []byte go slice of post body for later use pe. in iso8859ToUtf8
+         */
+        bodyBytes(): string
+    }
+
+    /**
+     * read results from a collection
+     *
+     * @param colName collection name
+     * @param options options map
+     */
+    readCollection(
+        colName: string,
+        options?: ReadCollectionOptions
+    ): CollectionDocument[]
+
+    /**
+     * read count of documents for filter from a collection
+     *
+     * @param colName collection name
+     * @param options options map (only filter is valid)
+     */
+    readCollectionCount(
+        colName: string,
+        options?: ReadCollectionOptions
+    ): number
+
+    /**
+     * create a document in a collection
+     *
+     * @param colName collection name
+     * @param data data map
+     */
+    createDocument(
+        colName: string,
+        data: CollectionDocument
+    ): CollectionDocument
+
+    /**
+     * update a document in a collection
+     *
+     * @param colName collection name
+     * @param id id of entry
+     * @param data new/changed data
+     */
+    updateDocument(
+        colName: string,
+        id: string,
+        data: CollectionDocument
+    ): CollectionDocument
+
+    /**
+     * deletes one document by id from collection
+     *
+     * @param colName collection name
+     * @param id id of entry
+     */
+    deleteDocument(colName: string, id: string): { message: "ok" }
+
+    /**
+     * deletes documents by filter from collection
+     *
+     * @param colName collection name
+     * @param options options map, only filter valid
+     */
+    deleteDocuments(
+        colName: string,
+        options?: ReadCollectionOptions
+    ): { message: "ok"; removed: number }
+
+    /**
+     * send an email
+     *
+     * @param options email options map
+     */
+    mail(options: {
+        to: string | string[]
+        cc?: string | string[]
+        bcc?: string | string[]
+        subject?: string
+        from: string
+        fromName?: string
+        replyTo?: string
+        plain?: string
+        html?: string
+        attach?: string | string[]
+    }): void
+
+    /**
+     * execute a template code and return result
+     *
+     * @param code template code
+     * @param contextData template context map
+     */
+    template(
+        code: string,
+        contextData?: {
+            [key: string]: any
+        }
+    ): string
+
+    /**
+     * read a file relative to config dir and return its content
+     *
+     * @param path relative file path
+     */
+    file(path: string): string
+
+    /**
+     * http request
+     *
+     * @param url url for request
+     * @param options request options
+     */
+    fetch(
+        url: string,
+        options?: {
+            method?: string
+            headers?: { [key: string]: string }
+            body?: string
+        }
+    ): {
+        status: number
+        statusText: string
+        headers: { [key: string]: string }
+        trailer: { [key: string]: string }
+        url: string
+        body: {
+            text(): string
+            json(): any
+        }
+    }
+
+    /**
+     * dumps data to header and server log
+     *
+     * @param toDump data to dump
+     */
+    dump(...toDump: any): void
+
+    /**
+     * set response header
+     *
+     * @param name header name
+     * @param value value
+     */
+    header(name: string, value: any): void
+
+    /**
+     * get JWT authentication
+     */
+    auth(): {
+        id: string
+        username: string
+        role: number
+        permissions: string[]
+    }
+
+    /**
+     * get Sentry trace id
+     */
+    sentryTraceId(): string
+
+    /**
+     * hash password via bcrypt algo
+     *
+     * @param password clear text password
+     * @param options hashing options
+     */
+    bcryptHash(
+        password: string,
+        options?: {
+            cost?: number
+        }
+    ): string
+
+    /**
+     * check password against hashed password via bcrypt algo
+     *
+     * @param password clear text password
+     * @param hash hashed password
+     */
+    bcryptCheck(password: string, hash: string): boolean
+
+    /**
+     * create a jwt signed token string
+     *
+     * @param claims data object
+     * @param options options (secret, validityDuration = expiry in X seconds)
+     */
+    jwtCreate(
+        claims: {
+            [key: string]: any
+        },
+        options?: {
+            secret?: string
+            validityDuration?: number
+        }
+    ): string
+
+    /**
+     * parse jwt token string
+     *
+     * @param token token string
+     * @param options options (secret)
+     */
+    jwtParse(
+        token: string,
+        options?: {
+            secret?: string
+        }
+    ): {
+        error?: string
+        valid: boolean
+        method: {
+            Name: string
+            Hash: number
+        }
+        header: {
+            alg: string
+            typ: string
+        }
+        claims: {
+            exp?: number
+            [key: string]: any
+        }
+    }
+
+    /**
+     * convert iso8859 to utf8
+     *
+     * @param iso8859 iso string
+     */
+    iso8859ToUtf8(iso8859: string): string
+}
+
+export interface HookException {
+    status?: number
+    html?: string
+    [key: string]: any
+}
+
+export interface HookResponse extends GetHookData, PostHookData {
+    data?: CollectionDocument
+    results: any
+}
+
+declare global {
+    var context: HookContext
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..64ae38d
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "types": [],
+    "noEmit": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "files": [
+    "index.d.ts"
+  ]
+}
\ No newline at end of file