diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..848be27
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,7 @@
+FROM python:3-alpine
+
+RUN pip install boto3
+
+COPY entrypoint.py .
+
+ENTRYPOINT [ "entrypoint.py" ]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f429e5e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,52 @@
+# Read Elastic Beanstalk Environment Data
+
+A GitHub Action to read data about an AWS Elastic Beanstalk environment.
+
+## Example
+
+```yaml
+- name: Configure AWS Credentials
+  uses: aws-actions/configure-aws-credentials@v1
+  with:
+    aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+    aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+    aws-region: us-west-2
+- id: env_status
+  uses: alexjurkiewicz/elastic-beanstalk-read-environment@master
+  with:
+    application_name: My App
+    environment_name: production
+- run: |
+    ver="${{ steps.env_status.output.version }}"
+    Currently deployed version: $ver
+    if [[ $ver != ${{ github.sha }} ]] ; then
+      echo "Not running the latest code."
+      exit 1
+    fi
+```
+
+## Inputs
+
+You can select the environment to load data about in two ways:
+
+1. Exact `environment_id` match
+2. Exact `environment_name` match (optionally with `application_name`)
+
+| Input | Required? | Description |
+| --- | --- | --- |
+| environment_id | No | Return data on this environment (eg `e-abcd1234yz`). |
+| environment_name | No | Return data on environment with this exact name. If you have environments with the name in multiple applications, also specify `application_name`. |
+| application_name | No | Restrict `environment_name` matches to this application. |
+
+### Environment Variables
+
+You need to provide AWS credentials via the [`aws-actions/configure-aws-credentials` action](https://github.com/aws-actions/configure-aws-credentials).
+
+## Outputs
+
+| Output | Description |
+| --- | --- |
+| name | Environment name. |
+| id | Environment ID (eg `e-abcd1234yz`). |
+| application | Application the environment exists in. |
+| version | Currently deployed application version label. |
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..fd8f15e
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,31 @@
+name: Read Elastic Beanstalk Environment Data
+author: Alex Jurkiewicz
+description: Read the status of an AWS Elastic Beanstalk Environment
+inputs:
+  application_name:
+    description: Application to search for the environment
+    required: false
+    default: ""
+  environment_name:
+    description: Environment name to search for
+    required: false
+    default: ""
+  environment_id:
+    description: Environment ID to load (eg `e-abcd1234yz`)
+    required: false
+    default: ""
+outputs:
+  name:
+    description: Environment name
+  id:
+    description: Environment ID (eg `e-abcd1234yz`)
+  application:
+    description: Application the environment exists in
+  version:
+    description: Currently deployed application version label
+runs:
+  using: docker
+  image: Dockerfile
+branding:
+  color: green
+  icon: codesandbox
diff --git a/entrypoint.py b/entrypoint.py
new file mode 100644
index 0000000..f771b3f
--- /dev/null
+++ b/entrypoint.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import sys
+
+import boto3
+
+
+def debug(msg):
+    print(f"::debug::{msg}")
+
+
+def fail(msg):
+    print(f"::error ::{msg}")
+    sys.exit(1)
+
+
+def set_output(key, val):
+    print(f"Set output {key}={val}")
+    print(f"::set-output name={key}::{val}")
+
+
+def load_config():
+    config = {
+        "app_name": os.environ.get("INPUT_APPLICATION_NAME"),
+        "env_id": os.environ.get("INPUT_ENVIRONMENT_ID"),
+        "env_name": os.environ.get("INPUT_ENVIRONMENT_NAME"),
+    }
+    debug(f"Loaded config: {config}")
+    return config
+
+
+def validate_config(config):
+    if not config["app_name"] and not config["env_id"] and not config["env_name"]:
+        fail("You must specify at least environment_id or environment_name.")
+    if config["env_id"] and (config["env_name"] or config["app_name"]):
+        fail(
+            "If you specify environment_id, don't specify environment_name or application_name."
+        )
+    if config["app_name"] and not config["env_name"]:
+        fail("If you specify application_name, environment_name is required.")
+
+
+if __name__ == "__main__":
+    CONFIG = load_config()
+    validate_config(CONFIG)
+
+    client = boto3.client("elasticbeanstalk")
+
+    describe_environments_params = {}
+    if CONFIG["app_name"]:
+        describe_environments_params["ApplicationName"] = CONFIG["app_name"]
+    if CONFIG["env_id"]:
+        describe_environments_params["EnvironmentIds"] = [CONFIG["env_id"]]
+    if CONFIG["env_name"]:
+        describe_environments_params["EnvironmentNames"] = [CONFIG["env_name"]]
+    debug(f"Request params: {describe_environments_params}")
+    response = client.describe_environments(**describe_environments_params)
+    debug(f"Response: {response}")
+
+    if len(response["Environments"]) > 1:
+        apps = ",".join(e["ApplicationName"] for e in response["environments"])
+        fail(f"Found multiple matching environments in applications: {apps}")
+
+    if not response["Environments"]:
+        fail("Found no matching environment.")
+
+    env = response["Environments"][0]
+
+    set_output("name", env["EnvironmentName"])
+    set_output("id", env["EnvironmentId"])
+    set_output("application", env["ApplicationName"])
+    set_output("version", env["VersionLabel"])