httpYac

Free#14 of 38 in API Clients

A free, open-source client for sending and testing API requests.

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At a glance

Editor score
Not yet scored
Pricing
Free plan
Best for
Open-source CLI and desktop users
Free plan
Yes
Paid from
None
Automated test runs
Yes
Facts checked
20 Sep 2026

Where it wins
- Supports REST, SOAP, GraphQL, gRPC, WebSocket, and MQTT requests
- Includes scripting, response assertions, authentication, and CI execution
- Adds Jupyter Notebook documentation and plugin support
Where it doesn't
- Platform coverage is focused on desktop environments
- The workflow centers on VS Code and command-line use
- Its broad protocol coverage may exceed simple REST-only needs

Our verdict on httpYac

httpYac is an open-source API client for creating, executing, and storing request definitions. It is aimed at developers who want a free desktop tool with both a VS Code extension and command-line interface. The product covers REST, SOAP, GraphQL, gRPC, WebSocket, and MQTT requests, giving users one workspace for several API styles. Variables and environment management support repeatable request workflows, while authentication options include OAuth2, AWS, Basic, Digest, and client certificates.

Its strongest distinction is the depth of its request workflow. JavaScript scripting and response assertions support more than simple request execution, and CLI execution brings request files into CI testing. The published feature set also includes request documentation in Jupyter Notebook format, which gives teams a way to document API interactions alongside executable definitions. Plugin support extends the tool beyond its core capabilities, while team workspaces are included in its category coverage. This combination suits developers who want testing, documentation, and automation in the same open-source project.

The main trade-off is platform focus: the listed coverage is desktop-only, with usage organized around VS Code and the CLI. That makes httpYac a strong fit for developers comfortable with editor-based and terminal workflows, particularly those who value open-source software and multiple protocols. It is less suitable for buyers seeking a narrowly focused REST client or a product whose primary experience is outside desktop development tools. Choose httpYac when protocol breadth, scripting, assertions, CI execution, and extensibility matter more than a simpler interface.

httpYac pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on httpyac.github.io

httpYac fact sheet

Free plan	Yes
Paid from	None
GraphQL support	Yes
gRPC support	Yes
WebSocket support	Yes
Automated test runs	Yes
API documentation	Yes
Team workspaces	Yes
Available platforms	Desktop
Pricing	Free plan
Website	httpyac.github.io
Facts checked	20 Sep 2026

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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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