diff --git a/.github/workflows/main.c b/.github/workflows/main.c
new file mode 100644
index 0000000..42b3300
--- /dev/null
+++ b/.github/workflows/main.c
@@ -0,0 +1,20 @@
+// Stub main to generate a tiny, valid symbol file for testing upload.
+// To generate the symbol file, run:
+//
+// clang --target=arm-none-eabi -nostdlib -Os -g1 -Wl,--entry=main,--build-id main.c -o test.elf
+//
+// NOTE: the above command uses "-g1" to omit macros from the .debug_str
+// sections. "-g3" is always preferred for real world use cases.
+
+#include <stdint.h>
+
+// This is a dummy build ID symbol set to "GNU Build ID" type.
+__attribute__((used)) const uint8_t g_memfault_build_id[3] = {0x2};
+
+// Junk so we can force a new build id
+__attribute__((used)) const char timedata[] = __TIME__;
+__attribute__((used)) const char date[] = __DATE__;
+
+int main() {
+    return 0;
+}
diff --git a/.github/workflows/test_action.yml b/.github/workflows/test_action.yml
new file mode 100644
index 0000000..8f9c85c
--- /dev/null
+++ b/.github/workflows/test_action.yml
@@ -0,0 +1,34 @@
+name: Test Action
+# Run on PRs targeting main, and push to main
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  # also support on workflow_dispatch
+  workflow_dispatch:
+
+jobs:
+  test-action:
+    runs-on: ubuntu-latest
+    name: Run a test of the action
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Generate test symbol file
+        run: |
+          cd .github/workflows
+          clang --target=arm-none-eabi -nostdlib -Os -g1 -Wl,--entry=main,--build-id main.c -o test.elf
+          readelf -n test.elf
+
+      - name: Test action
+        id: test_action
+        uses: ./ # Uses an action in the root directory
+        with:
+          MEMFAULT_ORG_TOKEN: ${{ secrets.MEMFAULT_ORG_TOKEN }}
+          MEMFAULT_ORG_SLUG: ${{ secrets.MEMFAULT_ORG_SLUG }}
+          MEMFAULT_PROJECT_SLUG: ${{ secrets.MEMFAULT_PROJECT_SLUG }}
+          symbol_file: .github/workflows/test.elf
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7911982
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+# Memfault Upload Symbol File GitHub Action
+
+This action uploads a symbol file to Memfault's symbol file service.
+
+## Inputs
+
+> [!TIP]
+>
+> The `MEMFAULT_ORG_TOKEN`, `MEMFAULT_ORG_SLUG`, and `MEMFAULT_PROJECT_SLUG`
+> should be set as GitHub secrets.
+
+| Name                    | Description                                                                                                    | Required | Default |
+| ----------------------- | -------------------------------------------------------------------------------------------------------------- | -------- | ------- |
+| `MEMFAULT_ORG_TOKEN`    | Organization Auth Token. Generate one [here](https://app.memfault.com/organizations/-/settings/auth-tokens) | true     |         |
+| `MEMFAULT_ORG_SLUG`     | Memfault Org Slug                                                                                              | true     |         |
+| `MEMFAULT_PROJECT_SLUG` | Memfault Project Slug                                                                                          | true     |         |
+| `symbol_file`           | Path to the symbol file                                                                                        | true     |         |
+| `memfault_cli_version`  | Memfault CLI Version                                                                                           | true     | 1.0.11  |
+
+Find more documentation here: [Memfault Docs](https://docs.memfault.com/docs/ci/uploading-symbols).
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..a4a0c76
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,43 @@
+name: 'Memfault Upload Symbol Files Action'
+
+description: 'Upload symbol files to Memfault'
+
+inputs:
+  MEMFAULT_ORG_TOKEN:
+    description: 'Organization Auth Token. Generate one at https://app.memfault.com/organizations/-/settings/auth-tokens'
+    required: true
+  MEMFAULT_ORG_SLUG:
+    description: 'Memfault Org Slug'
+    required: true
+  MEMFAULT_PROJECT_SLUG:
+    description: 'Memfault Project Slug'
+    required: true
+
+  symbol_file:
+    description: 'Path to the symbol file'
+    required: true
+  memfault_cli_version:
+    description: 'Memfault CLI Version'
+    required: true
+    default: "1.0.11"
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Install Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+
+    - name: Install Dependencies
+      shell: bash
+      run: pip install memfault-cli==${{ inputs.memfault_cli_version }}
+
+    - name: Upload the symbol file
+      shell: bash
+      run: |
+        memfault \
+          --org-token ${{ inputs.MEMFAULT_ORG_TOKEN }} \
+          --org ${{ inputs.MEMFAULT_ORG_SLUG }} \
+          --project ${{ inputs.MEMFAULT_PROJECT_SLUG }} \
+          upload-mcu-symbols ${{ inputs.symbol_file }}