Data Generation

MockAPI provides 30+ image categories that return URLs to hosted stock images. These are served from MockAPI's CDN and are always available.

All image URLs follow the pattern: https://cdn.mockapi.com/file/mockapi/{{category}}/{{filename}}

You can reference other models to create nested objects. Select another model as the property type, and MockAPI will generate a nested object (or array) using that model's properties.

Enable Sequential on a property to generate incrementing values. This is commonly used for ID fields. The sequence starts at 1 by default and increments for each item in a range response.

[
  { "id": 1, "name": "Alice" },
  { "id": 2, "name": "Bob" },
  { "id": 3, "name": "Charlie" }
]

For number and decimal types, use Range Start and Range End to constrain generated values. For example, setting range 1-100 generates numbers between 1 and 100.

Enable Static Data to always return the same value for a property. The static value is returned as-is in every response. Useful for version numbers, constant strings, or fixed configuration values.

Define a set of possible values and MockAPI will randomly pick one for each generated instance. Enter values as a comma-separated list.

Example: For a "status" field, enter: active, inactive, pending, suspended

Example: For a "color" field, enter: red, blue, green, yellow, purple

Use regular expression patterns to generate strings that match a specific format. MockAPI uses the regex pattern to produce matching strings.

Example: [A-Z]{3}-\d{4} generates strings like ABC-1234

Character sequences provide a simpler alternative to regex for common patterns:

When you set a project's locale to "de" (German), name properties generate German names, address properties generate German addresses, and so on. MockAPI supports all major Faker.js locales including:

If a specific locale variant is not available (e.g., "en_GB"), MockAPI falls back to the base language ("en"). Both hyphenated (en-US) and underscored (en_US) formats are accepted.