API client · Flawid D'Souza

Restfox

Free MIT-licensed HTTP and WebSocket client for the browser and desktop, with Git-friendly file workspaces.

68/100

#6 of 11 API clients
Facts checked 8 Oct 2026

In short

The source is public under the MIT licence^1,6.
No pricing page or paid plan is published; the web app and desktop builds are free to use^1,7.
Workspaces can be kept in the filesystem in a Git-friendly layout, or inside the application².
Runs as a web app at restfox.dev and as desktop builds for macOS, Linux and Windows¹.
Plugins act as pre-request and post-response scripts, with expect() assertions^3,4.

Restfox suits people who want a free, open-source client that works offline and keeps workspaces as files^1,2. It covers HTTP, GraphQL and WebSocket requests and response tests^2,3. The catch: no command-line runner, mock servers or team workspaces are published, and its docs are short^1,7.

Best for: People who want a free, open-source client with no account.

Where the points come from

Systems6 of 10

Requests and protocols21 of 33

Your data22 of 22

Teams and trust0 of 16

Price19 of 19

Systems 6 of 10 points

Rule	What is published	Points
Other systems	macOS, Linux, Web appREADME lists a web app, macOS via Homebrew, Linux via snap, RPM and DEB, and Windows via Scoop¹.	6 / 6
Command-line runner	Not publishedNot published in the vendor's README, docs or release notes^1,7,5.	0 / 4

Requests and protocols 21 of 33 points

Rule	What is published	Points
Built-in protocols	GraphQL, WebSocketRepository topics name GraphQL and WebSocket; the web app offers GraphQL and Websocket request types; no SSE type^1,2.	6 / 12
Imports OpenAPI	YesThe web app's import dialog has an OpenAPI URL option for YAML or JSON specs². Not described in the docs.	4 / 4
Scripts and tests	YesPlugins run before a request is sent and after a response; test() blocks use expect() assertions^3,4.	8 / 8
Collection runner	YesThe web app includes a Collection Runner dialog². Not described in the docs.	3 / 3
Mock servers	Not publishedNot published in the vendor's README, docs or release notes^1,7,5.	0 / 3
Publishes API docs	Not publishedNot published in the vendor's README, docs or release notes^1,7,5.	0 / 3

Your data 22 of 22 points

Rule	What is published	Points
Works without an account	YesREADME calls it offline-first; the web app offers local application workspaces and shows no sign-in option^1,2.	8 / 8
Collections as plain files	YesWorkspace type 'In Filesystem (Git Friendly)' is offered; release notes mention File Workspaces^2,5.	8 / 8
Open-source apps	YesRepository licence is MIT, an OSI-approved licence⁶.	6 / 6

Teams and trust 0 of 16 points

Rule	What is published	Points
Shared team workspaces	Not publishedNot published in the vendor's README, docs or release notes^1,7,5.	0 / 7
SAML or OIDC single sign-on	Not publishedNot published in the vendor's README, docs or release notes^1,7,5.	0 / 4
SOC 2 Type II or ISO 27001	Not publishedNot published in the vendor's README, docs or release notes^1,7,5.	0 / 5

Price 19 of 19 points

Rule	What is published	Points
Free plan	YesThe web app and desktop builds are free under the MIT licence; requests, collections and environments are saved locally^1,2,6.	10 / 10
Cheapest paid plan	$0No paid plan or pricing page is published; MIT-licensed, so counted as entirely free^1,6,7.	9 / 9

The rule behind each line: how we score API clients.

Plans and prices

As the vendor lists them, before tax. Prices are in US dollars unless the plan shows euros; the points use US dollars, with euros converted at the ECB rate.

Plan	Price as listed	Per month	Notes
Free1 person	Free^1,6	$0	MIT-licensed; no paid plan is published

Strengths

MIT-licensed source on GitHub⁶.
Described as offline-first, with web and desktop builds¹.
A filesystem workspace type is labelled Git friendly².
Imports Postman, Insomnia, cURL and OpenAPI files, with a Collection Runner dialog in the web app².
Response tests use expect() assertions and show in a Tests tab³.

Limits

No command-line tool for running collections is described¹.
No server-sent events request type appears in the web app².
No mock servers, API docs publishing or shared team workspaces are published^1,7.
Documentation covers plugins only, so most features are undocumented⁷.

Other API clients

1
InsomniaPeople who want an open-source client with GraphQL, gRPC, WebSocket and SSE screens
85/100
$10/mocheapest paid plan
2
BrunoDevelopers who want collections in their own repository and no account
82/100
$6/mocheapest paid plan
3
PostmanTeams that want shared workspaces, mock servers and published docs in one place
78/100
$9/mocheapest paid plan
4
ApidogSmall teams that want design, testing, mocking and docs in one tool
70/100
$9/mocheapest paid plan

All 11 API clients

Sources

flawiddsouza/Restfox README, GitHub. Accessed 8 Oct 2026.
Restfox web app, Restfox. Accessed 8 Oct 2026.
Testing Response Data, Restfox. Accessed 8 Oct 2026.
Plugins introduction, Restfox. Accessed 8 Oct 2026.
Restfox releases, GitHub. Accessed 8 Oct 2026.
Restfox MIT licence, GitHub. Accessed 8 Oct 2026.
Restfox documentation, Restfox. Accessed 8 Oct 2026.

Website: restfox.dev · Markdown version · We are not affiliated with Flawid D'Souza.