Layer 1

Contract Testing Agent That Works!
Automated. Fast. Simple.

Keploy automatically creates and validates your API contracts. No manual setup, no scripting, no integrations, zero configuration.

Expected (Contract)
Consumer
contract.json
userId:string
"12345"
Actual (Response)
Provider
response.json
userId:number
12345

Type Mismatch Detected

Breaking Change

Provider returned number instead of string

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Advanced Contract Testing

Intelligent API Contract Testing

Advanced features designed to ensure your API contracts remain consistent, reliable, and production ready with zero friction

Automatic Schema Generation & Analysis

Automatic Schema Generation & Analysis

Keploy automatically generates comprehensive API schemas and performs deep analysis across status codes, response headers, body fields, and all parameters—ensuring complete contract validation.

Automatic schema generation from API traffic
Comprehensive status code validation
Response header analysis and verification
Field-level parameter validation
Complete response body schema analysis
Automatic detection of schema changes and drifts
End-to-end API contract validation
AI-Powered Analysis

Create and Analyse Your Schema, Using Keploy

Keploy instantly analyzes API requests and responses to auto-generate complete schemas, assertions, tests and detect changes.

API Request
curl -X POST https://example.com/api/users \ -H "Content-Type: application/json" \ -d '{ "user": { "id": "12345", "email": "user@example.com", "age": 28, "isActive": true, "role": "admin", "address": { "street": "123 Main St", "city": "San Francisco", "zipCode": "94105" }, "tags": [ "developer", "premium" ], "createdAt": "2025-01-15T10:30:00Z", "metadata": { "lastLogin": "2025-10-24T09:00:00Z", "loginCount": 142 } } }'
Schema Generated By Keploy

Generating schema...

Zero Manual Work

Forget manual schema definition. Keploy extracts everything from your API requests

Type Detection

Automatic detection of strings, numbers, booleans, objects, and arrays

Instant Generation

Schemas generated in seconds, ready to use for contract testing

Schema Generated By Keploy
{
"user":
{
"id": "12345",
"email": "user@example.com",
"age": 28,
"isActive": true,
"role": "admin",
"address":
{
"street": "123 Main St",
"city": "San Francisco",
"zipCode": "94105"
}
,
"tags":
[
"developer",
"premium"
]
,
"createdAt": "2025-01-15T10:30:00Z",
"metadata":
{
"lastLogin": "2025-10-24T09:00:00Z",
"loginCount": 142
}
}
}
Generated Asertions
0 fields

Analysis starting...

Real Traffic. Real Data. Real Tests.

Automated Test Data Generation
From Real Traffic.

Real test data generated directly from your environment powered by AI. Keploy captures real API interactions, analyzes behavior, and generates accurate, production-like test data.

Client

Web/Mobile App

Keploy Logo

Keploy

Intercepting and Analyzing

Capturing Traffic
Generating Tests

Server

Backend or other dependencies

Keploy Generating Tests

Real-time API traffic analysis

Live Capture
0/8

Waiting for API traffic...

Requests will appear here as they are captured

0
Captured
0
Analyzed
0
Tests Generated
Contract Validation Engine

Compare Every Field, Catch Every Difference

Keploy performs deep contract testing by comparing each API field against your contract definitions, detecting type mismatches, format changes, and breaking modifications instantly

Keploy Logo

Ready to Test

Testing 8 fields • 0 passed • 0 failed

Field Comparisons
0 / 8

Initializing field comparison...

Tests will start automatically

Test Summary & Analysis
Ready
0
Passed
0
Failed
0
Warnings

Tests running...

Results will appear here as tests complete

Complete Automation

Credible and Reliable, AI Powered Tests

Keploy eliminates all contract testing pain points. No installations, no dependencies, no manual work. Just enter your API and get complete test coverage automatically.

Step 1

Endpoint

Enter API URL

Step 2

cURL Calls

Provide requests

Keploy
Step 3

Extract Data

Parse structure

Keploy
Step 4

Check Facts

Validate fields

Keploy
Step 5

Create Test

Generate tests

Keploy
Step 6

View Report

See insights

Enter Endpoint

No setup needed, just provide your API URL

Solves: Complex configuration & steep learning curve

API URL
Auth Setup
Zero Config

Provide cURL Calls

Share your actual API requests and responses

Solves: Manual contract definition work

HTTP Methods
Request Body
Response Data

Extract Schema

AI automatically infers data structure and types

Solves: Writing manual schema definitions

Type Detection
Field Mapping
Relationships

Validate Contract

Checks status codes, body, headers & all fields

Solves: Manual validation scripts & dependency hell

Status Codes
Headers Check
Body Validation

Generate Tests

Complete test suites created automatically instantly

Solves: Writing test scripts by hand

Test Cases
Edge Cases
Assertions

Run & Report

Execute tests with visual diffs and executive summary

Solves: Manual test execution & reporting

Test Reports
Visual Diffs
Insights

Why Keploy Wins

No Installation Required

Zero dependencies, integrations or complex setup needed to start testing

No Manual Script Writing

Tests are auto-generated, no need to write testing code by hand

No Contract Definition

Contracts are automatically extracted from your API traffic and responses

No Learning Curve

Designed for everyone - developers or non-developers can use it instantly

No SDKs Required

Works out-of-the-box without language-specific SDKs or plugins

No Package Dependencies

Zero additional packages to install or manage in your project

No Integration Headaches

Works seamlessly with any framework or tool without complex integration

Smart Bug Insights

Automatically finds faults in your tests and reports potential bugs with precision.

Start Testing Now

No credit card needed. Get your first test suite in under 3 seconds.

100%
Test Cases
2-3s
Time Taken
0 lines
Code Written
The Old Way is Slow

Switch to an Automated Contract Testing Tool

Compare how Keploy automates the entire process versus traditional manual approaches

Simple & Automated

~5 minutes total

Record API Calls

Automatic capture

1 min

Auto-Generate Tests

AI-powered creation

2 min

Review Diffs

Visual comparison

2 min

✨ Zero configuration — works out of the box

5s
Total Time
0
Lines of Code
100%
Automated

Automatic Test Generation

Initializing...

Generated Contracts
Expected
{
"id": 123,
"status": "ok"
}
Generated
{
"id": 123,
"status": "ok"
}
Perfect Match

Total Time

7 min

Ready in minutes

Dependencies

0

Required packages

Complexity Rating

Setup Difficulty

10%

Maintenance

5%

Learning Curve

10%

Feature Comparison

Why Teams Choose Keploy

See how Keploy outperforms traditional contract testing tools

Setup & Configuration

Setup Time
5 minutes
Learning Curve
None
Infrastructure Required
Configuration Files
Zero

Testing Capabilities

Auto-Generate Tests
No-Code Solution
Real-Time Diff Detection
Field-Level Analysis

Maintenance

Manual Updates Required
Auto-Sync with API Changes
Maintenance Hours/Month
4-5 Mins

Developer Experience

Visual Diff Interface
Error Messages
Clear
Integration Speed
Instant

Ready to make testing faster?

Join teams saving hours of manual testing!

Powerful Features Of Keploy Contract Testing

Everything you need to ensure bulletproof contracts across your entire stack

Automated Contract Tests

Automated Contract Tests

Automatically generate and execute API Contract Tests to reduce manual effort and errors with Keploy.

Automation

Cross-Language Support

Cross-Language Support

Achieve consistent Contract Testing across multiple programming languages and services.

Cross-Language

Scalable Testing

Scalable Testing

Easily scale Contract Testing across complex architectures with Keploy’s high-performance engine.

Scalability

Error Detection

Error Detection

Quickly identify and resolve API Contract mismatches to maintain reliability across microservices.

Error Detection

Detailed Reporting

Detailed Reporting

Get comprehensive insights into API Contract Test results with Keploy’s powerful reporting dashboard.

Reporting

Real-Time Monitoring

Real-Time Monitoring

Monitor ongoing Contract Testing activities and results across all services in real time.

Monitoring

FAQs

Contract testing verifies that microservices or APIs communicate as expected by validating their request and response structures. It helps ensure compatibility across services during integration.

Keploy automates contract testing and validation, reducing manual verification efforts. It ensures consistent API behavior across microservices and integrates seamlessly with your CI/CD pipeline.

Keploy captures API interactions and automatically generates contract tests. These tests validate API contracts during subsequent runs, ensuring communication integrity between services.

Keploy's contract testing can be easily integrated with CI/CD tools like GitHub Actions, GitLab, and Jenkins. This ensures continuous contract validation during every build cycle.

Contract testing prevents breaking changes in APIs by validating expected responses. It enhances collaboration between teams and ensures smoother deployment cycles.

Your all-in-one contract
testing platform

Design contract tests, validate API interactions, and ensure integration quality on one powerful platform.

Need Resources?

Read Documentation

Integration Testing Simplified

Start With Keploy Open Source

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