About Mockulator

Mockulator is a free hosted mock API service for developers, QA engineers, and AI agents. It removes the waiting from software work: you should not need a finished backend to build a frontend, a live third-party account to test a webhook handler, or a hand-written fixture file to demo realistic data.

What it does

You create a mock server, add endpoints with the status code, headers, and body you want, and each endpoint is live immediately at a public HTTPS URL under https://api.mockulator.com. Endpoints can return dynamic fake data generated with faker.js templates, rotate through several responses, match conditional rules on request fields, validate incoming requests, add response delays, and require Basic, API key, or custom auth. Every request an endpoint receives is logged and shown in the dashboard in real time.

Who it is for

  • Frontend and mobile developers building against APIs that do not exist yet.
  • Backend developers testing webhook integrations with Stripe, Shopify, GitHub, Slack, and others.
  • QA engineers simulating error paths, timeouts, and edge cases.
  • AI agents and coding assistants, which can create and edit endpoints through the Mockulator MCP server or the REST API.

Pricing

Mockulator is free. Every account has the same limits: 25 mock servers and 250 endpoints. There are no paid tiers and no credit card is required.

Contact

For developers and agents