The API client that feels native.
Aero is a lightweight REST API client for macOS, built with SwiftUI and SwiftData. Build requests, read responses and switch between dev and prod in one click.
{
"data": [
{
"id": "usr_41",
"name": "Ada Lovelace",
"email": "ada@example.com",
"admin": true
},
{
"id": "usr_42",
"name": "Grace Hopper",
"email": "grace@example.com",
"admin": false
}
],
"has_more": true,
"next_cursor": "usr_42"
}Features
Everything between the request and the response.
The parts of API testing you repeat every day, in a fast, native Mac app.
Any method, any body
GET through OPTIONS, query parameters and headers you can switch on and off row by row. JSON bodies are validated and pretty-printed.
None · JSON · Raw · Form URL-Encoded · Multipart
Auth built in
Bearer token, Basic and OAuth 2.0. The authorization-code flow opens in the system sign-in sheet.
client credentials · authorization code
Readable responses
Color-coded status, elapsed time and payload size up top. Pretty JSON, raw text and headers below, with search and one-click copy.
Preview · Raw · Headers
Collections and tabs
Keep requests in collections. Open several at once in tabs, each holding its own response.
saved locally with SwiftData
Environments
Define variables once and switch between dev and prod in one click. Aero fills them in when you send.
{{baseUrl}}/v1/users
History
Every request you run is kept. Open one to see what was sent and send it again.
review · re-send
Import and export
Paste a cURL command. Get a request.
Bring what you already have. Aero imports and exports cURL commands and Postman Collection v2.1 files.
- Copy a command from API docs, a terminal or a teammate's message.
- Paste it into Aero. Method, URL, headers and body are filled in.
- Send it, then copy it back out as cURL when you need to share it.
curl -X POST https://api.acme.dev/v1/users \
-H 'Authorization: Bearer sk_live_...' \
-H 'Content-Type: application/json' \
-d '{"name":"Katherine Johnson","email":"katherine@example.com"}'{
"auth": "Bearer Token",
"headers": {
"Content-Type": "application/json"
},
"body": {
"name": "Katherine Johnson",
"email": "katherine@example.com"
}
}Under the hood
Made for the Mac, with Apple's own tools.
No web view and no bundled browser. Aero is SwiftUI from the sidebar to the response viewer.
SwiftUI
A three-column layout: collections, the request editor and the response, side by side.
NavigationSplitView
SwiftData
Collections, environments and history are stored on your Mac, with a versioned schema so updates migrate your data safely.
SchemaV1 · SchemaMigrationPlan
Sandboxed
Aero can make outgoing connections and open files you choose. Requests go straight from your Mac to your API.
URLSession · async/await
Roadmap
What's coming after launch
Code generation
Turn any request into a ready-to-paste snippet for other languages.
GraphQL
Write queries and variables with the same editor and response viewer.
WebSocket
Connect, send messages and watch the stream next to your REST requests.
FAQ
Questions before launch
When can I download Aero?
Aero is in App Store review now. Leave your email below and we'll send one message on launch day.
Which Macs does it run on?
Aero needs macOS 26 Tahoe or later. It's a Mac app for now.
Can I bring my Postman collections?
Yes. Aero imports and exports Postman Collection v2.1 files, and you can paste any cURL command to create a request.
Do I need an account?
No. Install Aero and start sending requests. There is nothing to sign up for.
Where is my data stored?
On your Mac. Collections, environments and history are saved locally with SwiftData.
Does Aero send my requests through its own servers?
No. Requests go directly from your Mac to the API you're testing, using Apple's URLSession.
Is GraphQL supported?
Not yet. GraphQL, WebSocket and code generation are on the roadmap.
Launch list
Be first to take off.
One email on launch day, with the Mac App Store link. Nothing else.