What should I use for API tests with GitHub Actions?

For API tests in GitHub Actions, a solid default choice is:

Recommended setup

• Test runner: pytest if you're using Python, or your language’s native test framework
• API testing tool/library:
  • Python: pytest + requests or pytest + httpx
  • JavaScript/TypeScript: jest + supertest or vitest + undici/fetch
  • Java/Kotlin: RestAssured
  • Go: testing + httptest / resty
• CI orchestration: GitHub Actions with a job that:
  1. checks out code
  2. installs dependencies
  3. starts the app or points to a deployed test environment
  4. runs API tests
  5. uploads test reports/artifacts if needed

If you want the simplest practical option

• Python: pytest + requests
• Node: supertest for Express apps, or plain fetch/axios for external endpoints

If you need more than basic tests

• Contract testing: Pact
• Load/performance testing: k6
• Schema validation / API workflows: Postman/Newman or pytest with JSON schema checks
• End-to-end API tests: pytest, RestAssured, or supertest depending on stack

Good rule of thumb

Choose the tool that matches your app language and keeps tests:

• easy to read
• fast to run in CI
• able to fail clearly with good error messages

Example GitHub Actions flow

A typical API test workflow looks like this:

name: API Tests

on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'
      - name: Install deps
        run: pip install -r requirements.txt
      - name: Run tests
        run: pytest

If you tell me your stack (Python/Node/Java/etc.) and whether the API is local or deployed, I can recommend the best tool and a workflow file.