How to Choose the Best Development API in 2026
There are 120 Development APIs in our directory. Of these, 52 require no authentication, making them ideal for quick prototyping. 52 are rated beginner-friendly.
Last updated: April 2026
Quick Comparison: Top 10 Development APIs
| Name | Auth | HTTPS | CORS | Difficulty |
|---|---|---|---|---|
| Userstack | OAuth | ✓ | ? | Advanced |
| 24 Pull Requests | No Auth | ✓ | ✓ | Beginner |
| Agify.io | No Auth | ✓ | ✓ | Beginner |
| API Grátis | No Auth | ✓ | ? | Beginner |
| ApicAgent | No Auth | ✓ | ✓ | Beginner |
| ApiFlash | API Key | ✓ | ? | Intermediate |
| APIs.guru | No Auth | ✓ | ? | Beginner |
| Azure DevOps | API Key | ✓ | ? | Intermediate |
| Base | API Key | ✓ | ✓ | Intermediate |
| Beeceptor | No Auth | ✓ | ✓ | Beginner |
Free Development APIs (No Authentication)
These APIs require no API key or signup. Start using them immediately.
24 Pull Requests
24 Pull Requests is a development API described as: Project to promote open source collaboration during December.
Agify.io
Agify.io is a development API described as: Estimates the age from a first name.
API Grátis
API Grátis is a development API described as: Multiples services and public APIs.
ApicAgent
ApicAgent is a development API described as: Extract device details from user-agent string.
APIs.guru
APIs.guru is a development API described as: Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs.
Beeceptor
Beeceptor is a development API described as: Build a mock Rest API endpoint in seconds.
Best Development APIs for Beginners
These are the easiest Development APIs to get started with.
24 Pull Requests
24 Pull Requests is a development API described as: Project to promote open source collaboration during December.
Agify.io
Agify.io is a development API described as: Estimates the age from a first name.
API Grátis
API Grátis is a development API described as: Multiples services and public APIs.
ApicAgent
ApicAgent is a development API described as: Extract device details from user-agent string.
APIs.guru
APIs.guru is a development API described as: Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs.
Beeceptor
Beeceptor is a development API described as: Build a mock Rest API endpoint in seconds.
Try It in 5 Minutes: 24 Pull Requests
Here is a quick example using 24 Pull Requests, one of the easiest Development APIs to get started with.
Using curl (Mac / Linux / Windows)
curl https://24pullrequests.com/api
JavaScript (Node.js / Browser)
const url = "https://24pullrequests.com/api";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); Python
import requests
url = "https://24pullrequests.com/api"
headers = {}
response = requests.get(url, headers=headers, timeout=30)
response.raise_for_status()
data = response.json()
print(data) New to APIs? Read our Getting Started Guide
Frequently Asked Questions
How many Development APIs are available?
There are 120 Development APIs in our directory as of 2026.
Are there free Development APIs?
Yes, 52 Development APIs require no authentication and are completely free to use.
What is the easiest Development API to use?
24 Pull Requests is one of the easiest to get started with. It is rated as beginner-level and requires no authentication.
Do I need an API key for Development APIs?
It depends. 52 APIs need no authentication, 53 require an API key, and 14 use OAuth.