improve mysql readme

databases/mysql/apis/bank.md

@@ -0,0 +1,34 @@
+# Banks API
+
+All examples show cURL and [HTTPie](https://httpie.io/cli) snippets.
+
+## Adding A Bank
+
+```sh
+curl -d '{"bank_name":"Bank ABC","country":"Kenya"}' -H 'Content-Type: application/json' http://localhost:8080/bank
+
+http POST :8080/bank bank_name="Bank ABC" country="Kenya"
+```
+
+You should expect a 204 No Content response.
+
+## Listing Banks
+
+```sh
+curl http://localhost:8080/bank
+
+http :8080/bank
+```
+
+The response should be a 200 OK with the following JSON body:
+
+```json
+{
+  "bank_data": [
+    {
+      "bank_name": "bank abc",
+      "country": "kenya"
+    }
+  ]
+}
+```