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API Circle
In your editor

Edit the same workspace from VS Code

The VS Code extension drives the very same workspace document as the desktop and web apps, byte-for-byte. Requests, environments, and plans are editable YAML under an apicircle: virtual file system, with Send CodeLenses, schema validation, mock servers, a secret vault, and one-click MCP install for Copilot Chat.

Edit the same workspace from VS Code
The API Circle extension running inside VS Code
01

Native, not a webview

Requests open as .req.yaml documents with full editing, JSON-Schema validation, completion for all 17 auth types, and live pre-send diagnostics in the Problems panel.

02

Three-surface parity

The same applyMutation chokepoint means edits from VS Code, desktop, and web produce byte-for-byte identical commits. One repo, three surfaces.

03

Everything in the sidebar

Workspace, Editor, Environment, Execution, Mock, History, Snapshots, MCP, and Link Workspaces — plus auto-refresh when MCP or the CLI writes the file.

Get going in one command

Install from the Marketplace or Open VSX, then edit requests as YAML right in your editor.

Install the extension
$ code --install-extension apicircle.apicircle-vscode

Bring your APIs under version control

Open the web app in your browser, or grab the desktop build. No account, no setup — your first workspace is created the moment you arrive.