FlasqoAI-Powered API Testing Platform —
Test Smarter, Ship Faster
Paste your API URL and Flasqo's AI auto-discovers endpoints and generates a complete test suite — functional, smoke, load, regression, contract, GraphQL, fuzz and chaos testing in one place. No manual test writing, no juggling five different tools.
Start Testing FreeEvery kind of API test, one platform
Flasqo bundles thirteen testing modules that normally require separate tools — a REST client, a load tester, a chaos framework and hand-written scripts — into a single AI-driven workflow.
AI Test Generation
Generates happy-path, edge-case, negative and security test cases from your API structure — 10 to 100 tests per endpoint in seconds.
API Auto-Discovery
Point Flasqo at a base URL and it finds endpoints, detects authentication and maps your API surface automatically.
Functional Testing
Full CRUD validation, response checking and data assertions for REST APIs.
Smoke Testing
Fast health checks for critical endpoints — built for CI/CD deployment validation.
Performance & Load Testing
Load, stress, spike and endurance testing with real-time latency and throughput metrics.
Chaos Engineering
Inject latency, simulate service failures, timeouts and rate limits to validate resilience.
Fuzz Testing
Malformed and unexpected inputs that surface crashes and validation gaps before attackers do.
Regression Testing
Catch breaking changes between releases by re-running saved suites and diffing results.
Contract Testing
Verify responses against expected schemas so consumers never break on drift.
GraphQL Testing
Schema-aware testing for queries and mutations, not just REST.
Integration Flows
Chain requests into multi-step scenarios with a visual flow builder.
Vibe Testing
Describe what to test in plain English — the AI turns it into executable tests.
Production Gate
A deploy gate that blocks releases when coverage, pass rate or latency budgets fail.
How Flasqo compares to Postman, Katalon and Insomnia
Traditional API clients are built around manually maintained request collections. Flasqo starts from AI-generated suites and covers performance and resilience testing that those tools leave to separate products.
| Capability | Flasqo | Postman | Katalon | Insomnia |
|---|---|---|---|---|
| AI test generation | ✓ | Partial | Partial | — |
| API auto-discovery | ✓ | — | — | — |
| Performance / load testing | ✓ | Add-on | ✓ | — |
| Chaos & fuzz testing | ✓ | — | Partial | — |
| Contract testing | ✓ | Partial | Partial | Partial |
| Natural-language tests | ✓ | — | — | — |
| Free to use | ✓ | Limited | — | ✓ |
Detailed comparisons: Flasqo vs Postman · Flasqo vs Insomnia · Flasqo vs Katalon · Flasqo vs Bruno · Flasqo vs Hoppscotch · Best Postman alternatives
How it works
- Configure your API — enter the endpoint URL and sample data.
- Set authentication — Bearer token, API key or Basic auth if needed.
- Generate tests — AI creates 10–100 test cases covering happy paths, edge cases, negative inputs and security checks.
- Review and customise — select, edit or add your own cases.
- Run everything — execute the suite with live streaming results.
- Ship with proof — download JSON/PDF reports or push results to GitHub.
Frequently asked questions
What is Flasqo?
Flasqo is a free AI-powered API testing platform. Paste your API URL and it auto-discovers endpoints, generates a full test suite — happy-path, edge-case, negative and security tests — and runs functional, smoke, performance, regression, contract, GraphQL, fuzz and chaos tests from one dashboard.
Is Flasqo free to use?
Yes. Flasqo is free to use with unlimited test runs and no credit card required.
How is Flasqo different from Postman?
Postman is built around manually created request collections and hand-written test scripts. Flasqo generates test suites automatically with AI and bundles performance, chaos, fuzz, contract and GraphQL testing into the same platform, so you don't need separate tools like JMeter or custom scripts. See the full Flasqo vs Postman comparison.
Do I have to write test cases manually?
No. Flasqo's AI generates 10–100 test cases per endpoint covering happy paths, edge cases, negative inputs and security checks. You can review, edit and add your own custom cases before running.
Can Flasqo test GraphQL APIs?
Yes. Flasqo has a dedicated GraphQL testing module that understands your schema and generates tests for queries and mutations, alongside REST testing.
Does Flasqo work in CI/CD pipelines?
Yes. Smoke tests are designed for fast deployment validation, the Production Gate module blocks risky deploys, and results can be saved to GitHub repositories via the built-in integration.
Which authentication methods does Flasqo support?
Flasqo supports Bearer tokens, API keys and Basic authentication for testing protected APIs.