Your work in a safe harbor that you control.
No accounts, no subscriptions, no lock-in. HarborClient is a native desktop app for building, sending, and inspecting HTTP requests. Your collections stay on your machine or in storage you control. Share collections with team members using Git, Postgres, MySQL, Firestore, and more.
The problem
Most API tools want your data in their cloud
Popular clients push you into accounts, paid tiers, and synced workspaces. Your requests, secrets, and team workflows end up tied to someone else’s infrastructure.
- Mandatory sign-ups and subscription tiers
- Collections locked to vendor-hosted sync
- Limited control over where secrets and data live
- Hard to self-host or integrate with your Git workflow
The solution
Your requests. Your storage. Your rules.
HarborClient runs locally as a cross-platform Electron app. Choose SQLite on disk, connect to MySQL, PostgreSQL, or Firestore, or version collections in Git. Without routing everything through a central SaaS.
- Free and open. No accounts or subscriptions because it's your data
- Pluggable storage you configure and operate
- Native app for macOS, Windows, and Linux
- Secrets and API keys stay on your machine
Features
Everything you need to work with APIs
A full request builder, collections, environments, and a tabbed workspace. Built for daily API development without the bloat.
- Method selector, params, headers, JSON/plain body, and auth
- Collections, folders, drag-and-drop, and environment variables
- Variable substitution with live preview on {{tokens}}
- Response viewer with status, timing, size, and pretty-printed JSON
Collaboration
Share work the way your team already does
Collaborate through Git branches and pull requests, point teammates at shared remote storage, or connect to a self-hosted Team Hub for token-based access.
- Git-backed collections with commit and push from the app
- Remote storage engines for shared collections
- Team Hub for centralized workflow without shared DB credentials
- Encrypted sharing with RSA keys you manage
Extensibility
Scripts, plugins, and AI on your terms
Automate requests with pre- and post-request JavaScript, extend HarborClient with installable plugins, and chat with AI using your own API keys stored locally.
- Ordered scripts and reusable snippets at collection or request level
- Plugin marketplace with signed packages and custom endpoints
- AI assistant that inspects collections and reads responses
- JMESPath queries against JSON response bodies
What teams say
Built for developers who own their toolchain
HarborClient fits teams that want Postman-style workflows without giving up control over data, secrets, or how collaboration works.
- “Finally an API client that doesn’t need a login just to save a request.”
- “We pointed everyone at our Postgres storage and stopped managing cloud workspaces.”
- “Git-backed collections changed how we review API changes with the rest of our code.”
Pricing
Free forever. No catch.
HarborClient is free to download and use. There are no premium tiers, usage limits, or required accounts. Optional Team Hub infrastructure is self-hosted on your own servers.
- HarborClient desktop app and it's free
- All core features are included
- Your own storage and API keys. No vendor markup
- Team Hub, optional, self-hosted, open source
