Open Source · Built with Go + Wails

The high-performance native API client,
built in Go.

Zero Electron bloat. Integrated multi-tab terminal. Git-friendly YAML collections. Local-first by design.

Download Free Star on GitHub

✓ Windows✓ macOS✓ Linux

Heapi — List Products.yaml

Storefront API

GETList Products

POSTCreate Product

PUTUpdate Stock

CMD + K to search

GET

{{base_url}}/inventory

params

headers

body

auth

Key	Value
limit	10
offset	0
New key...	Value...

Send a request to see the response

Terminal

# Heapi PTY v0.1.0 (ConPTY)

marcelo@heapi:~$ _

Powerful Features

Engineered for your workflow.

Heapi brings the tools you already know and love into a unified, distraction-free environment.

Integrated Terminal

Stop Alt+Tabbing to your terminal. Heapi features a fully integrated PTY shell. Run database queries, spin up docker containers, or watch server logs right alongside your HTTP requests.

✓ Auto-detects PowerShell, CMD, Bash & WSL
✓ Full ANSI color and interactive prompt support
✓ Native performance via Go PTY bridging

POSThttps://api.dev/v1/users

201 Created85ms

{
                "id": "usr_9a8b7c",
                "email": "dev@heapi.local",
                "status": "active"
              }

Bash

dev@local:~/backend$ psql -U admin api_db
psql (15.4)
api_db=# SELECT id, email FROM users ORDER BY created_at DESC LIMIT 1;
id     |      email
------------+-----------------
usr_9a8b7c | dev@heapi.local
(1 row)

api_db=# █

Git-Friendly YAML

Say goodbye to endless JSON merge conflicts. Heapi stores your collections and environments natively in clean, readable YAML files. Treat your APIs like code.

✓ Perfect for Pull Request code reviews
✓ Natural support for multi-line strings & bodies
✓ No proprietary cloud sync lock-in

Collections

Stripe API

create_charge.yaml

refunds.yaml

name: Create Charge
method: POST
url: {{stripe_url}}/v1/charges
headers:
- Authorization: Bearer {{api_key}}
body: |
  amount=2000&
currency=usd&
source=tok_visa

Uncompromising Speed

No Electron. No bloated chromium containers. Built with a Go backend and Wails, Heapi launches in milliseconds and uses a fraction of the RAM required by typical desktop clients.

✓ Sub-second application startup
✓ Single native binary
✓ Ultra-low memory footprint (<50MB idle)

Startup Time

<1s

Instant boot

Memory Usage

~200MB

in production

Comparison

How does Heapi stack up?

Feature	Heapiyou	Postman	Insomnia	Hoppscotch	Bruno
Native (Powered by Go + Wails)
100% Open Source / MIT
No account required
Git-compatible collections
Built-in terminal panel
Free forever
Environment variables
Collection sharing