diff --git a/packages/cactus-common/package-lock.json b/packages/cactus-common/package-lock.json
index ced0620072..e273ddf71e 100644
--- a/packages/cactus-common/package-lock.json
+++ b/packages/cactus-common/package-lock.json
@@ -201,6 +201,12 @@
 			"resolved": "https://registry.npmjs.org/node-gyp-build/-/node-gyp-build-4.2.3.tgz",
 			"integrity": "sha512-MN6ZpzmfNCRM+3t57PTJHgHyw/h4OWnZ6mR8P5j/uZtqQr46RRuDE/P+g3n0YR/AiYXeWixZZzaip77gdICfRg=="
 		},
+		"openapi-types": {
+			"version": "7.0.1",
+			"resolved": "https://registry.npmjs.org/openapi-types/-/openapi-types-7.0.1.tgz",
+			"integrity": "sha512-6pi4/Fw+JIW1HHda2Ij7LRJ5QJ8f6YzaXnsRA6m44BJz8nLq/j5gVFzPBKJo+uOFhAeHqZC/3uzhTpYPga3Q/A==",
+			"dev": true
+		},
 		"punycode": {
 			"version": "2.1.1",
 			"resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
diff --git a/packages/cactus-common/package.json b/packages/cactus-common/package.json
index 848d9dda32..b1fc543dfb 100644
--- a/packages/cactus-common/package.json
+++ b/packages/cactus-common/package.json
@@ -74,6 +74,7 @@
   "devDependencies": {
     "@types/joi": "14.3.4",
     "@types/json-stable-stringify": "1.0.32",
-    "@types/secp256k1": "4.0.1"
+    "@types/secp256k1": "4.0.1",
+    "openapi-types": "7.0.1"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/cactus-common/src/main/typescript/index.ts b/packages/cactus-common/src/main/typescript/index.ts
index 8f6c6cd3ca..20be4a6266 100755
--- a/packages/cactus-common/src/main/typescript/index.ts
+++ b/packages/cactus-common/src/main/typescript/index.ts
@@ -1,2 +1,8 @@
 export * from "./public-api";
 export { IListenOptions, Servers } from "./servers";
+export {
+  DEFAULT_FILENAME,
+  DEFAULT_RELATIVE_PATH,
+  IOpenApiSpecJsonToFsOptions,
+  openApiSpecJsonToFs,
+} from "./nodejs/openapi-spec-json-to-fs";
diff --git a/packages/cactus-common/src/main/typescript/nodejs/openapi-spec-json-to-fs.ts b/packages/cactus-common/src/main/typescript/nodejs/openapi-spec-json-to-fs.ts
new file mode 100644
index 0000000000..13a346d439
--- /dev/null
+++ b/packages/cactus-common/src/main/typescript/nodejs/openapi-spec-json-to-fs.ts
@@ -0,0 +1,51 @@
+import { OpenAPIV3 } from "openapi-types";
+
+/**
+ * Options to customize how the `openApiSpecJsonToFs()` function exports
+ * an OpenAPI spec to JSON format to the local file-system.
+ */
+export interface IOpenApiSpecJsonToFsOptions {
+  /**
+   * The actual specification document (object) that holds the information we
+   * will export to JSON onto the local filesystem.
+   */
+  openApiSpec: OpenAPIV3.Document;
+  /**
+   * Absolute path on the file-system for the calling script file
+   * (e.g. `__dirname` in a NodeJS environment).
+   */
+  callerScriptPath: string;
+  /**
+   * Defaults to "../json/generated/"
+   */
+  relativePath?: string;
+  /**
+   * The target filename to export the JSON created from the OpenAPI spec.
+   * Defaults to "openapi-spec.json"
+   */
+  filename?: string;
+}
+
+export const DEFAULT_RELATIVE_PATH: string = "../json/generated/";
+
+export const DEFAULT_FILENAME: string = "openapi-spec.json";
+
+export async function openApiSpecJsonToFs(
+  opts: IOpenApiSpecJsonToFsOptions
+): Promise<void> {
+  const fnTag = "#openApiSpecJsonToFs()";
+
+  const fs = await import("fs");
+  const path = await import("path");
+
+  const filename = opts.filename || DEFAULT_FILENAME;
+  const relativePath = opts.relativePath || DEFAULT_RELATIVE_PATH;
+  const callerScriptPath = opts.callerScriptPath;
+  const defaultDest = path.join(callerScriptPath, relativePath, filename);
+  const destination = process.argv[2] || defaultDest;
+
+  // tslint:disable-next-line: no-console
+  console.log(`${fnTag} destination=${destination}`);
+
+  fs.writeFileSync(destination, JSON.stringify(opts.openApiSpec, null, 4));
+}