SideFetch — REST API Tester Side Panel

About

SideFetch is a REST API client that lives in Chrome's Side Panel. Test APIs right beside your documentation, Stack Overflow answers, or your own app — without switching tabs or opening heavy desktop tools like Postman.

FEATURES:

• Side Panel Testing — Opens in Chrome's Side Panel and stays open as you browse. Read API docs on the left, test endpoints on the right.

• All HTTP Methods — GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS. Send JSON, text, form data, or binary bodies.

• 12 Authentication Types — Bearer Token, Basic Auth, API Key, OAuth 1.0, OAuth 2.0, JWT, Digest, Hawk, AWS Signature V4, NTLM, Akamai EdgeGrid, and more. No more manually constructing auth headers.

• cURL Paste Detection — Copy a cURL command from any docs page, paste it into the URL bar, and SideFetch auto-fills the method, URL, headers, and body instantly.

• AI Error Explanations — Got a 401? 500? CORS error? Click "Explain Error" and get a plain-English explanation with actionable fixes. No more Googling cryptic error messages.

• Collapsible JSON Viewer — Expand and collapse nested JSON responses with syntax highlighting. Search within responses. Copy with one click.

• Request History — Every request is automatically saved. Replay any past request with one click.

• Collections — Organize frequently used endpoints into named collections for quick access.

• Dark & Light Mode — Switch themes to match your preference.

• Keyboard Shortcuts — Hit Cmd+Enter (or Ctrl+Enter) to send requests instantly.

FREE PLAN (forever):
- Unlimited requests with all HTTP methods
- All 12 auth types
- JSON tree viewer + cURL paste
- 50 history items, 3 collections
- 5 AI explanations per day

PRO PLAN ($5.99/month):
- Unlimited history, collections, and AI explanations
- Import & export collections
- Priority support

Your data stays local. API requests go directly from your browser to the target server. History and collections are stored in Chrome's local storage — never sent to our servers.

Questions or feedback? Email [email protected]