diff --git a/src/apispec.ts b/src/apispec.ts
new file mode 100644
index 0000000..d6d4b7f
--- /dev/null
+++ b/src/apispec.ts
@@ -0,0 +1,33 @@
+import { MetadataArgsStorage } from 'routing-controllers';
+import { routingControllersToSpec } from 'routing-controllers-openapi';
+import { config } from './config';
+
+/**
+ * This function generates a the openapi spec from route metadata and type schemas.
+ * @param storage MetadataArgsStorage object generated by routing-controllers.
+ * @param schemas MetadataArgsStorage object generated by class-validator-jsonschema.
+ */
+export function generateSpec(storage: MetadataArgsStorage, schemas) {
+    return routingControllersToSpec(
+        storage,
+        {},
+        {
+            components: {
+                schemas,
+                "securitySchemes": {
+                    "AuthToken": {
+                        "type": "apiKey",
+                        "in": "query",
+                        "name": "key",
+                        description: "A simple api key. See the README's env section for more details."
+                    }
+                }
+            },
+            info: {
+                description: "The the API for the LfK! mailer.",
+                title: "LfK! mailer API",
+                version: config.version
+            },
+        }
+    );
+}
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