diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2472410
--- /dev/null
+++ b/README.md
@@ -0,0 +1,24 @@
+# bazel-github-actions-cache
+
+bazel-github-actions-cache is a Bazel Remote Caching server that uses Github Action's undocumented cache API as backend.
+
+Its goal is to utilize Actions Cache more efficiently, both in terms of speed and space, compared to [actions/cache](https://github.com/actions/cache).
+
+## Usage
+
+Add following step in your actions yaml file.
+```
+    - name: bazel-github-actions-cache
+      uses: tsawada/bazel-github-actions-cache@v0
+```
+
+Add following flag to Bazel.
+```
+--remote_cache=http://localhost:3055
+```
+
+## TODO
+
+* Proper error handling
+* Compression
+* gRPC interface