How to Choose the Best Security API in 2026
There are 38 Security APIs in our directory. Of these, 14 require no authentication, making them ideal for quick prototyping. 14 are rated beginner-friendly.
Last updated: April 2026
Quick Comparison: Top 10 Security APIs
| Name | Auth | HTTPS | CORS | Difficulty |
|---|---|---|---|---|
| Application Environment Verification | API Key | ✓ | ✓ | Intermediate |
| BinaryEdge | API Key | ✓ | ✓ | Intermediate |
| BitWarden | OAuth | ✓ | ? | Advanced |
| Botd | API Key | ✓ | ✓ | Intermediate |
| Bugcrowd | API Key | ✓ | ? | Intermediate |
| Censys | API Key | ✓ | ✗ | Intermediate |
| Classify | No Auth | ✓ | ✓ | Beginner |
| Complete Criminal Checks | API Key | ✓ | ✓ | Intermediate |
| CRXcavator | API Key | ✓ | ? | Intermediate |
| Dehash.lt | No Auth | ✓ | ? | Beginner |
Free Security APIs (No Auth)
These APIs require no API key or signup. Start using them immediately.
Classify
Classify provides programmatic access to encrypting & decrypting text messages via REST API.
Dehash.lt
Dehash.lt provides programmatic access to hash decryption md5, sha1, sha3, sha256, sha384, sha512 via REST API.
EmailRep
⭐ Beginner's PickEmailRep is a free API that evaluates the risk and reputation of an email address in seconds.
Escape
⭐ Beginner's PickEscapeAPI is a simple open-source utility API that takes raw user input and returns properly escaped versions safe for use in HTML, SQL, shell, and other contexts.
FilterLists
⭐ Beginner's PickFilterLists is a community-maintained directory API that catalogs hundreds of filter lists used by ad blockers and firewalls like uBlock Origin and Pi-hole.
Hashable
Hashable provides programmatic access to a rest api to access high level cryptographic functions and methods via REST API.
Try It in 5 Minutes: Classify
Quick implementation example using Classify.
Using curl
curl https://classify-web.herokuapp.com/#/api
JavaScript
const url = "https://classify-web.herokuapp.com/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); New to APIs? Read our Getting Started Guide →
Frequently Asked Questions
How many Security APIs are available?
There are 38 Security APIs in our directory as of 2026.
Are there free Security APIs?
Yes, 14 Security APIs require no authentication and are completely free to use.
What is the easiest Security API to use?
Classify 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 Security APIs?
It depends. 14 APIs need no authentication, 23 require an API key, and 1 use OAuth.