--- title: AI API Test Generator | Automated API Testing & Validation | Roost.ai description: Generate API tests instantly from Swagger, Postman, or RAML using AI. Automate validation, test data, and workflows to improve coverage and speed delivery. --- ##### [CUSTOMER LOGIN](https://app.roost.ai/login)  |  [Watch Demo](https://roost.ai/roost-demo) Search Site Search [![Roost-logo-white - Instant and ephemeral preview environments](https://roost.ai/hubfs/logos/Roost-logo-white.svg)](https://roost.ai) [![Roost.ai-logo-gold](https://roost.ai/hubfs/logos/Roost.ai-logo-gold.svg) Roost-logo-white - Instant and ephemeral preview environments](https://roost.ai) - Platform - [Unit Test](https://roost.ai/unit-test) - [API Test](https://roost.ai/api-test) - [Functional](https://roost.ai/functional) - [UI Test](https://roost.ai/ui-test) - Product - [What is RoostGPT](https://roost.ai/what-is-roostgpt) - [How RoostGPT Works?](https://roost.ai/how-roostgpt-works) - [Java Unit Test Cases](https://roost.ai/java-unit-testing-with-roost-testing-co-pilot) - [Go Unit Test Cases](https://roost.ai/golang-unit-testing-with-roost-testing-co-pilot) - [API Test Cases](https://roost.ai/api-testing-with-roost-testing-co-pilot) - [Getting Started](https://docs.roost.ai/books/roostgpt/) - [Blog](https://roost.ai/blog) - About - [Team](https://roost.ai/leadership-team) - [Careers](https://roost.ai/roost-careers) - [Contact Us](https://roost.ai/contact-the-folks-at-roost) [Try RoostGPT](https://app.roost.ai/tryRoostAI) ##### [CUSTOMER LOGIN](https://app.roost.ai/login)  |  [Watch Demo](https://roost.ai/roost-demo) Search Site AI-Powered API Test Generation ## API Spec Driven. Multiple Output Test Frameworks. Transform your API specs into comprehensive test suites across 6 frameworks — with authentication scaffolding, test data generation, and load testing built in. [Book an Enterprise Demo](https://roost.ai/roost-demo) [Try RoostGPT](https://app.roost.ai/tryRoostAI) ## Customers Adopting Generative AI Driven Testing and Development ![LOGO\_Epsilon](https://roost.ai/hubfs/logos/customer/LOGO_Epsilon.jpeg "LOGO_Epsilon") ![LOGO\_productiv](https://roost.ai/hubfs/logos/customer/LOGO_productiv.png "LOGO_productiv") ![LOGO-simpplr](https://roost.ai/hubfs/logos/customer/LOGO-simpplr.png "LOGO-simpplr") ![LOGO-beyond-limits](https://roost.ai/hubfs/logos/customer/LOGO-beyond-limits.png "LOGO-beyond-limits") ![LOGO\_B-country](https://roost.ai/hubfs/logos/customer/LOGO_B-country.png "LOGO_B-country") ![logo\_lightbeam](https://roost.ai/hubfs/logos/customer/logo_lightbeam.png "logo_lightbeam") ### Keep building the same way... using the same DevOps tools you love! The Roost platform takes care of the complex parts of testing and deploying changes.   ### 4 Spec Formats ### 6 Test Frameworks ### 10 AI Providers ### Auth Built-In ## Four Steps. Complete API Coverage. From spec to comprehensive test suite, fully automated. ##### **1** ##### **Import** Upload Swagger, Postman, RAML, or Protocol Buffer specs. ##### **2** ##### Parse AI analyzes endpoints, schemas, auth flows, and data models. ##### **3** ##### Generate Complete test suites across your chosen frameworks. ##### **4** ##### Execute Run tests, validate responses, and generate reports. **Any Spec In. Any Test Out.** ## Connect API definitions to the framework your team already uses. RoostGPT maps spec formats to framework-native test output from BDD tests to load testing scenarios. Swagger / OpenAPI Postman Collection RAML Protocol Buffers Close Open Swagger / OpenAPI ### Swagger / OpenAPI Full endpoint discovery with schema validation.   **Karate BDD** BDD-style API tests with built-in assertions **REST-Assured** Java-based fluent API testing **pytest API** BDD-style API tests with built-in assertions **Postman/Newman** Collection runner with CI/CD integration **Artillery Load** Load testing with virtual user scenarios **Playwright API** API testing with browser context support Close Open Postman Collection ### Postman Collection Import existing requests with environment variables.   **REST-Assured** Java-based fluent API testing **pytest API** Python requests-based test suites **Postman/Newman** Collection runner with CI/CD integration **Playwright API** API testing with browser context support Close Open RAML ### RAML RESTful API Modeling Language support.   **Karate BDD** BDD-style API tests with built-in assertions **REST-Assured** Java-based fluent API testing **pytest API** Python requests-based test suites Close Open Protocol Buffers ### Protocol Buffers gRPC service definitions and message types.   **REST-Assured** Java-based fluent API testing **pytest API** Python requests-based test suites **Artillery Load** Load testing with virtual user scenarios **Six Frameworks. Your Choice.** ## Framework-native tests from one API spec. From BDD-style Karate to Artillery load testing, every test is generated in the framework your team prefers. ##### **Framework-Native Output** Generate Karate BDD, REST-Assured, pytest, Postman, Artillery, and Playwright tests. ##### **Full Test Structure** Auth scaffolding, test data, assertions, and error scenarios are included. ##### **One Spec, Many Outputs** Generate tests for multiple frameworks from a single API specification. ## Every Auth Method. Handled. Generated tests include complete authentication scaffolding for every method your API supports. OAuth 2.0 Bearer Token API Key Basic Auth Close Open OAuth 2.0 #### OAuth 2.0 Authorization code flow support with token request and bearer header setup.   ![OAuth-2.0](https://roost.ai/hubfs/0.Images/Integrations/OAuth-2.0.png) Close Open Bearer Token #### Bearer Token Reusable token fixtures and authorization headers for protected endpoints.   ![Bearer-Token](https://roost.ai/hubfs/0.Images/Integrations/Bearer-Token.png) Close Open API Key #### API Key Header, query, or environment-driven API key injection.   ![API-Key](https://roost.ai/hubfs/0.Images/Integrations/API-Key.png) Close Open Basic Auth #### Basic Auth Credential setup for simple username and password protected APIs. exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.   ![Basic-Auth](https://roost.ai/hubfs/0.Images/Integrations/Basic-Auth.png) ## Smart Test Data. Automatically. AI generates valid, boundary, and invalid test parameters from your schema definitions. | **Field** | **Type** | **Valid** | **Boundary** | **Invalid** | | --- | --- | --- | --- | --- | | name | string | "Alice Smith" | "A" | "" | | email | string | "alice@test.com" | "a@b.co" | "not-an-email" | | age | number | 25 | 0 | -1 | | role | enum | "admin" | "guest" | "superadmin" | | password | string | "SecureP@ss1" | "Ab1!" | "" | ## Integrations & Deployment. Drop into your existing stack with zero friction. ![Pipeline-Native](https://20612886.fs1.hubspotusercontent-na1.net/hubfs/20612886/0.Images/Integrations/Pipeline-Native.png) ### Pipeline Native Runs headless in any CI pipeline. Exit codes, JUnit output, and artifact uploads work out of the box. ![your-ai](https://20612886.fs1.hubspotusercontent-na1.net/hubfs/20612886/0.Images/Integrations/your-ai.png) ### Your AI. Your Choice. Switch between OpenAI, Azure, Gemini, and Bedrock with a single env var. No code changes needed. ![one-bianary](https://20612886.fs1.hubspotusercontent-na1.net/hubfs/20612886/0.Images/Integrations/one-bianary.png) ### One Binary. Every Platform. A single binary runs on macOS, Linux, and Windows. Docker images and proxy/SSL support included. ## The Old Way vs. The New Way. See what changes when API testing is fully automated. | **Category** | **Traditional** | **API Test Generator** | | --- | --- | --- | | Test Creation | ✖ Weeks of manual writing | ✔ **Minutes — fully automated** | | Auth Handling | ✖ Custom scripting per method | ✔**Built-in — OAuth, Bearer, API Key, Basic** | | Test Data | ✖ Hand-crafted fixtures | ✔**AI-generated — valid, boundary, invalid** | | Load Testing | ✖ Separate tool, separate config | ✔ **Artillery scenarios generated from spec** | | Mock Servers | ✖ Manual mock setup | ✔ **Auto-generated from schema definitions** | | Spec Coverage | ✖ Partial, based on tester knowledge | ✔ **Complete — every endpoint, every method** | | Framework Choice | ✖ Locked to one framework | ✔ **6 frameworks from a single spec** | | CI/CD | ✖ Custom scripting required | ✔ **Native — headless, Docker-ready** | | Maintenance | ✖ Constant manual updates | ✔ **Regenerate from updated spec** | | Cost Visibility | ✖ Unknown AI spend | ✔ **Full tracking per-phase, per-provider** | ## Complete API Testing, Automated. Everything you need for comprehensive, production-grade API test automation. | **Category** | **RoostGPT** | | --- | --- | | ✔ Swagger / OpenAPI spec parsing | ✔ Playwright API test generation | | ✔ Auth HandlingPostman Collection import | ✔ OAuth 2.0 / Bearer / API Key scaffolding | | ✔ Test DataRAML spec support | ✔ Smart test data generation | | ✔ Protocol Buffer / gRPC support | ✔ Boundary value & negative testing | | ✔ Karate BDD test generation | ✔ Response schema validation | | ✔ REST-Assured test generation | ✔ CI/CD pipeline integration | | ✔ pytest API test generation | ✔ Docker deployment | | ✔ Postman/Newman collection output | ✔ Cross-platform (macOS, Linux, Windows) | | ✔ Artillery load test generation | ✔ Full AI cost tracking & reporting | ## Transform Your API Specs into Tests. Your API tests are one command away. **$ roostgpt api-test --spec openapi.yaml** [Book an Enterprise Demo](https://app.roost.ai/tryRoostAI) [![Roost.ai creates ephemeral pre-productions environments and automatically tests code changes using existing wor ](https://roost.ai/hubfs/logos/Roost.ai-logo-gold.svg)](https://roost.ai/) [**Roost.ai 4950 Hamilton Avenue**](https://goo.gl/maps/n6i7bQKwTH545S899) [**San Jose, CA  95130**](https://goo.gl/maps/n6i7bQKwTH545S899) **Ph:** [+1 (669) 259-6674](tel:6692596674) [linkedin](https://www.linkedin.com/company/roost/) [github](https://github.com/) © 2026 Zettabytes Inc. dba Roost.ai - [Privacy Policy](https://roost.ai/privacy-policy) - Platform - [Unit Test](https://roost.ai/unit-test) - [API Test](https://roost.ai/api-test) - [Functional](https://roost.ai/functional) - [UI Test](https://roost.ai/ui-test) - Product - [What is RoostGPT](https://roost.ai/what-is-roostgpt) - [How RoostGPT Works?](https://roost.ai/how-roostgpt-works) - [Java Unit Test Cases](https://roost.ai/java-unit-testing-with-roost-testing-co-pilot) - [Go Unit Test Cases](https://roost.ai/golang-unit-testing-with-roost-testing-co-pilot) - [API Test Cases](https://roost.ai/api-testing-with-roost-testing-co-pilot) - [Getting Started](https://docs.roost.ai/books/roostgpt/) - [Blog](https://roost.ai/blog) - About - [Team](https://roost.ai/leadership-team) - [Careers](https://roost.ai/roost-careers) - [Contact Us](https://roost.ai/contact-the-folks-at-roost) ```json { "@context": "https://schema.org", "@type": "Organization", "name": "Roost.AI", "legalName" : "Zettabytes Inc. dba Roost", "alternateName": "Roost, Roost AI, zb.io, roost software, roost company, roost website, roost app, roost.io, Zettabytes Inc, Zettabytes Inc. dba Roost, Zettabytes", "url": "https://roost.ai/", "logo": "https://roost.ai/hubfs/logos/Roost-logo-gold.svg", "description": "At Roost, we provide on demand and ephemeral pre production environments. 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