OpenAPI Spec to Live Mock Server

Unfinished APIs slowing you down?

Deploy a mock API in seconds.
Accelerate frontend, QA, integrations and solutions.

Create your mock server

.free.beeceptor.com

Launch a mock server on a unique subdomain and simulate API behavior instantly.

Build Stateful, High-Performance Mock Servers in Minutes

Create reliable, production-like APIs for development, testing, CI pipelines, and customer demos. Beeceptor turns your API specifications and ideas into stateful mock servers. Upload OpenAPI/ Swagger GraphQL, gRPC, or SOAP definitions to get fully functional mock servers with realistic test data.

Rest, SOAP, GraphQL, Binary, JSON, XML

No Code Mocking

Set up mock servers instantly without writing code. Create behavior using matching rules and customize responses through an intuitive UI.

Request Inspection

View request payloads, headers, and details in real-time. Debug webhooks and callbacks effortlessly.

Contextual Dynamic Responses

Generate dynamic test data by reusing request payloads, headers, and query parameters. Build context-aware responses that adapt to inputs and accurately simulate real API behavior.

OpenAPI Import

Upload your OpenAPI (Swagger) spec and instantly get a fully populated mock server with AI-generated data.

Proxy & Record

Proxy requests to a live backend and record them. Switch to mock mode when the backend is down.

Delays & Timeouts

Simulate network latency, timeouts, and errors to test how your app handles failure scenarios.

CRUD API icon

CRUD Routes

Create GET, POST, PUT, PATCH, and DELETE routes for any JSON Rest API. Backed by a schema-less database, giving you the flexibility to store and retrieve objects.

Stateful Mock Servers

Simulate network latency, timeouts, and errors to test how your app handles failure scenarios.

Local Tunnel

Route third-party event payloads directly to your development machine on specific port. Skip the deployment cycles, and iterate faster.

SnapsheetClaims.com
shopify
Intercom
Oracle
Gupshup
Amazon Pay
mastercard
salesforce
Marqeta
auth0
“A game changer to API based companies”
The ease of using the tool makes the experience incredible! As the person responsible for my company's API product, I can say that beeceptor is a game changer.
Head Of DEV-X
Banking, United States
Read Review

Loved by Everyone

See what others are saying about Beeceptor.

"Fastest Mock REST API I have ever done! Beeceptor made that 2min task!"

Juergen

Juergen S.

Software Architect

"Having Beeceptor as a man-in-the-middle ... is a fantastic tool for working with semi-live data."

Tim
Tim S.
Web Developer

"Ease of use is the main thing about it. It's also quite flexible too."

Andre
André P.
Software Architect
Tested at Scale, Every Day
10M+ requests/day
across global teams
1,000+ mock servers
launched daily
99.9% uptime
proven over time