Delegation: send from the browser extension, or run/delegate the
request on the desktop app or the server
Workflows: schedule multiple linked requests with AND/OR
conditions and auto-refresh, then extract live variable values from
the responses
Variables: Workspace (global), Collection, Environment, Vault
(secret), Live
Browser Interceptor — modify live browser traffic
Rules: API HTTP request and response, headers, query params,
JS/CSS, WebSocket, SSE, block, redirect, delay, auth challenge
Structure: Collections > Folders > Rules
Modify API HTTP responses: mock, or rewrite the server's; body as
static data or dynamic JavaScript; optionally modify headers and
override the status code
Modify API HTTP requests: REST or GraphQL; body as static data or
dynamic JavaScript
Modify WebSocket messages and SSE events
Modify headers, query params and URLs
Inject JS and CSS
Block and redirect requests
Respond to auth challenges
Variables: every rule reads the same variable scopes; Live
variables filled by API Client workflows make prod-like scenarios
possible
DevTools panel: a custom Open Headers panel in the browser's
DevTools, with enterprise design and features
Team Collaboration — manage shared workspaces
Multi-workspace: your personal workspaces and the team's shared
workspaces, side by side
Backup and sync: through a local server you self-host or a remote
server you join
Server features: SSO, RBAC user management, audit logs
Git integration: durable workspace history, embedded version
control tools
Concurrent multi-user editing: CRDT-flavoured writes for the
workspace data
Work offline: auto-sync when back online
Enterprise Platform — free, like it should be
Tools: every major feature is embedded in its own Tool panel
Modern UI: minimalist workbench canvas with two active sidebars
and six dock regions
Modern UX: drag and drop the Tools across the dock regions to
group them
One user interface: desktop app, web app and browser extension
(workbench and browser DevTools panel)
Embedded documentation: info popovers and a Docs Tool with
diagrams and text, usable offline
Git: version control and commit changes directly inside the
desktop app
Traffic: route the browser traffic to the desktop app and modify
it there
AI integration: use your existing subscriptions with the MCP
server and automate interaction with your workspace data and Tools
Open Headers is open source under the Apache License 2.0.
Official branded binaries and store builds are distributed under the
End User License Agreement. Every feature is included
in the free tier — the software is identical on every plan, and paid
plans exist only to add team seats beyond the free tier's six active
users.
O
Open Headers
OpenHeaders·62 ดาว·
The open-source Enterprise API client in your browser. Team Collaboration. Browser Interceptor - modify live traffic.
