RESTK
RESTK: A capable free desktop client for REST and GraphQL workflows. Ranked #21 of 38 in API Clients by our editors (7.0/10); pricing: Free plan; best for free desktop REST and GraphQL testing.
At a glance
- Editor score7.0 / 10
- PricingFree plan
- Best forFree desktop REST and GraphQL testing
- Free planYes
- Paid fromFree
- Automated test runsYes
- Facts checked20 Sep 2026
Where it wins
- Free plan includes REST and GraphQL testing
- Broad authentication, scripting, assertions, and collection tools
- Imports Postman, OpenAPI, Insomnia, HAR, and cURL files
Where it doesn't
- Desktop-only availability on macOS and Windows
- Feature scope centers on REST and GraphQL workflows
- One Free plan provides no separate paid-tier feature options
Our verdict on RESTK
RESTK is a native API development and testing application for macOS and Windows. It is aimed at developers who need to build, send, inspect, and test REST or GraphQL requests from a desktop client. The Free plan includes a REST request builder, a GraphQL editor, collections, environments, scripts, authentication options, assertions, collection runs, and searchable request and response history. Local-first and offline workflows also make it suited to development work that does not require continuous connectivity.
The feature depth is strongest around request construction and repeatable testing. RESTK supports standard and custom HTTP methods, while its GraphQL editor includes schema introspection, autocomplete, and variables. Authentication covers OAuth 2.0, JWT, API key, Basic, Digest, AWS SigV4, Hawk, and NTLM. Pre-request and post-response JavaScript, pass/fail reporting, and collection runs support more structured API checks. Existing work can move in through Postman, OpenAPI/Swagger, Insomnia, HAR, and cURL imports. Git and cloud workspace modes add synchronization choices alongside local workspaces.
RESTK is currently free, with the Free plan priced at $0 USD and including its listed API client, testing, workspace, and scripting capabilities. A local MCP server connects the client with AI-assisted workflows through Claude Code, Claude Desktop, Cursor, and Windsurf. That combination makes RESTK a practical choice for developers seeking a broad REST and GraphQL toolkit without a subscription. It is less suitable for teams whose API work depends on protocols outside its stated REST and GraphQL focus, or for users seeking a non-desktop client. Buyers who want local control, import flexibility, and automated request checks should consider it; those needing broader protocol coverage should look elsewhere.
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RESTK pricing
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RESTK fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| GraphQL support | Yes |
| gRPC support | Not verified |
| WebSocket support | Not verified |
| Automated test runs | Yes |
| API documentation | Not verified |
| Team workspaces | Yes |
| Available platforms | Desktop |
| Deployment | Desktop |
| Platforms | macOS, Windows |
| Integrations | 9 integrations: Postman, OpenAPI/Swagger, Insomnia, HAR, cURL, Claude Code … |
| Pricing | Free plan (source) |
| Website | restk.ai |
| Facts checked | 20 Sep 2026 |
RESTK integrations
RESTK lists 9 integrations on its own site.
- Postman
- OpenAPI/Swagger
- Insomnia
- HAR
- cURL
- Claude Code
- Claude Desktop
- Cursor
- Windsurf
Alternatives to RESTK
- PostmanA broad API workspace spanning requests, testing, mocking, specifications, and delivery workflows.9.4
- SoapUIA mature, testing-focused API client for REST, SOAP, GraphQL, and CI workflows.9.2
- ApidogA broad API workspace for teams that want design, testing, mocks, and CI/CD together.8.8
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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