Endpoint Atlas by Rasmus Söderström
Add to browser
Chrome & Firefox extension

Navigate giant
Swagger docs in seconds.

A lightweight sidebar for Swagger UI pages that makes large API docs actually easy to move around.

Add toChrome Add toFirefox Explore onGitHub
Free & open source No data leaves your tab Zero config
petstore.swagger.io/v2/swagger enhanced
ParametersResponses
petId * requiredinteger · (path)
ID of pet to return
petId
Example response
"id": 10,
"category": { … },
"name": "doggie",
"status": "available",
"photoUrls": [ … ],
"tags": [ … ]
Works on any Swagger UI page OpenAPI 2 & 3 Localhost & internal docs No account needed
What it does

Everything Swagger UI's outline should have been.

Big API specs turn the built-in page into an endless scroll. Endpoint Atlas pins a fast, filterable map of every endpoint right where you need it.

Instant fuzzy filter

Start typing and the whole tree narrows live — jump from a 200-endpoint spec to the one route you need without scrolling.

pet8
breeds7
categories5
adoptions5

Tag grouping with counts

Every tag becomes a collapsible group with a live endpoint count, so the shape of the API is obvious at a glance.

pet8
veterinarians5
appointments6

Auth status, always visible

A pinned indicator shows whether your bearer token is live — no more guessing why every call returns 401.

Authorized token active

One click to any endpoint

Click a route and the page scrolls straight to it, expanded and ready. Method-coloured rows keep GET, POST and DELETE easy to scan.

GETPOSTPUTDELETEPATCH

Add it to your browser, free.

Install once and every Swagger UI page you open gets the sidebar automatically.

Add toChrome — Web Store Add toFirefox — Add-ons Explore onGitHub — Source
// no sign-up · no tracking · ~40 KB
Questions

Good to know

Does any of my API data leave the page?
No. Endpoint Atlas reads the OpenAPI spec already loaded in your tab and builds the sidebar locally. Nothing is sent to a server — there's no backend, no analytics, and no network calls of its own.
Which Swagger / OpenAPI versions are supported?
Any page rendered with Swagger UI, covering OpenAPI 2.0 (Swagger) and 3.x. The sidebar derives its groups from the spec's tags, exactly like the page you're reading them on.
Does it work on internal and localhost docs?
Yes — it runs entirely in the browser, so private, authenticated, and localhost Swagger pages all work the same as public ones. Your tokens stay in the tab.
Is it really free?
Completely. It's free and open source — install it from the Chrome Web Store or Firefox Add-ons and you're done. No account, no paid tier.
How do I install it?
Click Add to Chrome or Add to Firefox above and confirm. Then open any Swagger UI page — the sidebar appears on the left automatically, no setup required.