Run a Single API

Learn how to execute REST API requests, inspect responses, validate with assertions, and switch environments in OptraFlow — no code required.

OptraFlow makes it easy to execute and validate REST APIs without writing code. The Request Builder provides a familiar interface similar to Postman, allowing developers, testers, and QA engineers to quickly send API requests, inspect responses, and build automated API tests.

Whether you're testing a single endpoint or validating an entire API workflow, OptraFlow combines API execution, test generation, security testing, performance analysis, and business rule validation in one platform.

Execute API Requests

Execute any REST API by selecting the HTTP method, entering the endpoint URL, and configuring headers, query parameters, authentication, and request body.

After execution, OptraFlow displays:

HTTP status code
Response headers
Response body
Response time
Response size
Request timeline
Assertion results
Schema comparison results
Cookies and redirects (when applicable)

This enables you to quickly validate whether your API is behaving as expected without writing a single assertion manually.

Switch Between Environments

Use Environment Management to execute the same API against multiple environments without modifying the request.

DevelopmentQAUATStagingProduction

Simply switch the active environment and OptraFlow automatically substitutes environment variables, making API regression testing significantly faster.

No-Code API Assertions

OptraFlow includes a visual Assertion Manager that lets you create API assertions without writing JavaScript.

You can validate:

HTTP status codes
Response headers
Response time
Response schema
Response body values
JSON paths
Array sizes
String values
Numeric ranges
Boolean values
Empty or null fields

Smart suggestions

Smart assertions are automatically suggested based on the API response, helping you create reliable API tests in seconds.

Smart API Test Generation

Generate automated API tests directly from your existing API definitions. Supported sources include:

Generate API tests from OpenAPI
Generate API tests from Swagger
Generate API tests from Postman Collections
Generate API tests from cURL commands
Generate API tests from live API traffic
Generate API tests from recorded browser network requests

This dramatically reduces manual effort while increasing API test coverage.

API Validation

Validate every aspect of your API response. Supported validations include:

API Assertions
API Response Validation
API Schema Validation
JSON Schema Validation
Header Validation
Response Time Validation
Business Rule Validation
Data Type Validation
Contract Validation
Field-Level Validation

These validations can be reused across individual requests, request chains, and automated test suites.

Integrated API Testing

The Request Builder is more than an API client. It allows you to perform multiple types of API testing from a single interface. Supported capabilities include:

Functional API Testing
API Regression Testing
API Security Testing
API Performance Testing
API Load Testing
Rate Limit Testing
API Contract Testing
Authentication Testing
Negative Testing
Boundary Testing
Business Rule Testing

Quickly share API requests with your development team. You can copy:

cURL command
Complete HTTP request
Complete API response
Request headers
Response headers
JSON response body

These can be attached directly to Jira issues or shared with developers to simplify debugging and reproduce issues.

Use Assertions in Test Suites and Request Chains

Assertions created in the Request Builder can be reused throughout OptraFlow. They work seamlessly with:

API Test Suites
Request Chains
Scheduled Executions
CI/CD Pipelines
Automated Regression Suites

This allows the same validation logic to be executed consistently across all environments.

Why Use the OptraFlow Request Builder?

OptraFlow combines API development, API validation, and API automation into a single no-code platform.

Familiar Interface

Postman-like interface with no learning curve — build and run requests immediately.

No-Code Testing

Create assertions, generate tests, and validate APIs without writing a single line of code.

AI Test Generation

AI-powered test generation from OpenAPI specs, Postman collections, cURL commands, and live traffic.

Security Scanning

Built-in OWASP Top 10 security scanning and rate limit testing from the same interface.

Request Chaining

Chain requests, extract variables, and validate multi-step API workflows end-to-end.

CI/CD Integration

Run tests in CI/CD pipelines with full automation support and scheduled executions.

What's next

Continue to

Run a Test SuiteRun multiple test cases together as an automated suite.Run a Request ChainChain requests end-to-end and validate multi-step API workflows.