Overview
Randommer is a multi-purpose random data API that generates names, phone numbers, credit card numbers, text, and more — all through a single key-authenticated endpoint. It is a great one-stop shop for filling test forms with believable fake data. Register for a free API key to get started.
Beginner Tip
Pass your API key in the X-Api-Key request header rather than as a query parameter — this is the most common source of 401 errors for new users.
Available Data
Example Response
{
"status": "success",
"data": {
"result": "Data from Randommer",
"description": "Random data generator",
"timestamp": "2025-01-15T10:00:00Z"
}
} Field Reference
(array of strings) Most endpoints return a JSON array of generated strings, e.g. ["John Smith", "Jane Doe"] Implementation Example
const url = "https://randommer.io/randommer-api";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
headers: {
"X-API-Key": "YOUR_API_KEY"
}
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Partially tested on Apr 5, 2026
Technical Specifications
Related Tags
Similar APIs
View All →FakeJSON
FakeJSON provides programmatic access to service to generate test and fake data via REST API.
GeneradorDNI
GeneradorDNI is a data generator API that creates realistic fake profiles including personal identity numbers, vehicle data, bank accounts, and credit card details for testing purposes.
Mailsac
⭐ Beginner's PickMailsac lets you create disposable email addresses and read incoming messages via API — ideal for testing email-sending features in your app.
Mockaroo
⭐ Beginner's PickMockaroo lets you generate realistic fake datasets in JSON, CSV, SQL, or XML with fully customizable schemas.
Bacon Ipsum
⭐ Beginner's PickBacon Ipsum is a fun lorem ipsum generator that returns meat-themed placeholder text in JSON format.