diff --git a/lib/hdt.d.ts b/lib/hdt.d.ts
new file mode 100644
index 0000000..1b279c0
--- /dev/null
+++ b/lib/hdt.d.ts
@@ -0,0 +1,44 @@
+declare module "hdt" {
+  export interface Statement {
+    subject: string;
+    predicate: string;
+    object: string;
+  }
+
+  export interface SearchTermsOpts {
+    limit?: number;
+    position?: "subject" | "predicate" | "object";
+    prefix?: string;
+  }
+
+  export interface SearchLiteralsOpts {
+    limit?: number;
+    offset?: number;
+  }
+
+  export interface SearchLiteralsResult {
+    literals: string[];
+    totalCount: number;
+  }
+
+  export interface SearchTriplesOpts {
+    limit?: number;
+    offset?: number;
+  }
+
+  export interface SearchResult {
+    triples: Statement[];
+    totalCount: number;
+    hasExactCount: boolean;
+  }
+
+  export interface Document {
+    searchTriples(sub?: string, pred?: string, obj?: string, opts?: SearchTriplesOpts): Promise<SearchResult>;
+    countTriples(sub?: string, pred?: string, obj?: string): Promise<SearchResult>;
+    searchLiterals(substring: string, opts?: SearchLiteralsOpts): Promise<SearchLiteralsResult>;
+    searchTerms(opts?: SearchTermsOpts): Promise<string[]>;
+    close(): Promise<void>;
+  }
+  
+  export function fromFile(filename: string): Promise<Document>;
+}
diff --git a/package.json b/package.json
index 45ec916..8031d44 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
   "license": "LGPL-3.0",
   "main": "./lib/hdt",
   "bin": "./bin/hdt",
+  "types": "./lib/hdt.d.ts",
   "repository": {
     "type": "git",
     "url": "https://github.com/RubenVerborgh/HDT-Node.git"