AI Powered Mock API Server
From Your OpenAPI Spec

Get a ready-to-integrate mock server with dynamic, realistic responses - no code needed.

Powered by 300+ data generators to craft smart, lifelike responses.

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Sample OpenAPI Spec
GET
openapi: 3.0.0 info: title: Users API version: 1.0.0 paths: /v1/user: get: responses: '200': description: A user object content: application/json: schema: type: object properties: id: type: string username: type: string email: type: string country: type: string address: type: object properties: street: type: string city: type: string state: type: string zip: type: string
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Drop In Your
OpenAPI Spec

Upload your YAML/JSON spec to generate a contract-first mock environment — aligned with your design-first workflows.

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Launch an AI-Powered
Mock Server

Bring your API specification to life with realistic, schema-compliant responses powered by AI. Use it for early integrations, stakeholders, and cool demos.

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Simulate API Behaviors
Customize, Iterate

Model edge cases, simulate failures, and remove dependencies among team — all without touching real services.

Upload OpenAPI Specification

Drag & drop your OpenAPI/Swagger file to get started

or

file.yaml

Click "Create Mock Server" button to continue.

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Your Mock Server is Live!

http://localhost:3000

The mock server is ready with AI-generated, realistic data.
Explore API routes, monitor live traffic, and build overrides using mock rules from the dashboard page.

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The Smarter Way to Mock APIs

Got an OpenAPI spec? You’re already ahead.

Beeceptor uses AI-powered smart-contracts to instantly turn your OpenAPI spec into a live, integration-ready mock server, complete with realistic, golden test data. It’s not just mock responses, it’s production-grade simulation, built to unblock teams and accelerate development from day one.