Developer-friendly APIs, one secure sign-in for your apps, and Cashly for your money. Everything you need to build, manage and grow, from one team.
// Validate an email with one request
const res = await fetch('https://api.corenexis.com/email-validator/v1', {
method: 'POST',
headers: { 'X-API-Key': 'YOUR_KEY', 'Content-Type': 'application/json' },
body: JSON.stringify({ email: '[email protected]' }),
});
const data = await res.json();
// { "valid": true, "mx": true, "disposable": false }# Same call from the terminal
curl -X POST https://api.corenexis.com/email-validator/v1 \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"email":"[email protected]"}'import requests
r = requests.post(
"https://api.corenexis.com/email-validator/v1",
headers={"X-API-Key": "YOUR_KEY"},
json={"email": "[email protected]"},
)
print(r.json())Three products that work on their own and even better together.
Nine production APIs behind clean REST endpoints: PDF rendering, OCR, image conversion and delivery, email validation and QR codes. JSON in, JSON out, one API key.
Add secure sign-in to your own app with one OAuth 2.0 integration: Google, GitHub, Microsoft, magic link and password, with two-factor security and consent built in.
Track expenses, EMIs, debts, cards and bills in one place, without sharing any bank or card login. On the web, on Android and inside ChatGPT.
Nine production APIs behind clean REST endpoints. JSON in, JSON out, one API key.
Real-time checks with DNS and MX lookup
Catch temporary and throwaway addresses
Markdown into print-ready PDF or images
Render HTML and CSS with full modern CSS
Clean text and markdown out of any image
Extract text, scanned documents included
QR codes, UPI payment QRs and barcodes
Any format to any format, 25+ supported
Image delivery through a global CDN
POST /email-validator/v1
Corenexis API authenticate, validate
200 OK { "valid": true }
Corenexis Accounts is the sign-in and identity service behind the ecosystem, and you can put it in your own app. One OAuth 2.0 integration gives your users Google, GitHub, Microsoft, magic-link and password sign-in, with two-factor authentication, a consent screen and device management already built in.
# 1. Send the user to Corenexis
GET https://accounts.corenexis.com/
?redirect=https://yourapp.com/callback
# 2. We return a 60-second, single-use code
POST https://accounts.corenexis.com/api/token
# 3. Your server gets the identity
{ "access_token": "eyJhbGciOiJSUzI1NiJ9...",
"user": { "id", "email" } }# Exchange the code for tokens (server side)
curl -X POST https://accounts.corenexis.com/api/token \
-d "grant_type=authorization_code" \
-d "code=$CODE" \
-d "client_id=$CLIENT_ID" \
-d "client_secret=$CLIENT_SECRET" \
-d "redirect_uri=$CALLBACK"
# Never run this from the browser:
# the secret must stay on your server.# PKCE (RFC 7636) for mobile and desktop apps
# that cannot keep a secret.
GET https://accounts.corenexis.com/
?redirect=com.yourapp://auth
&code_challenge=BASE64URL(SHA256(v))
&code_challenge_method=S256
POST /api/token code_verifier=v
# A stolen code is useless without it.
Take control of your money without sharing any bank or card details. Track daily expenses, EMIs, subscriptions, debts and credit cards in one simple app, on the web, on Android and inside ChatGPT.
Calm, clever puzzle games for Android. Free to play, built to work offline, and made with the same care as everything else we ship.
Now on Google Play
Corenexis · Puzzle · Android
Tap an arrow and watch it slide off the board, but only if its path is clear. Arrowsmith is a relaxing arrow puzzle where every tap counts: find the right order, clear every arrow and escape the maze.
More Corenexis games are on the way. See all games
Consistent REST design, clear documentation and copy-ready examples for every endpoint.
Production infrastructure with a public status page, so you always know how things are running.
Key-based authentication, encrypted transport and no bank or card logins anywhere in our products.
APIs, sign-in and Cashly share one account, so the pieces work together as one product.
Whether you use the APIs, sign-in or Cashly, getting started is fast and simple.
Pick the APIs, Sign in with Corenexis or Cashly, based on what you need.
One free Corenexis account works across the whole ecosystem.
Follow the docs for the APIs and sign-in, or start tracking in Cashly right away.
Scale your apps and manage your money with Corenexis behind you.
Questions before you start, a hand once you are running, or help wiring the pieces together. You reach our team directly.
Planning an integration or need more than the free tier covers? Tell us what you are building and we will work out what fits.
Talk to salesAn endpoint not behaving the way the docs say? Send us the request and the response, and we will dig into it.
Get supportUsing the APIs, Cashly and Corenexis sign-in together? We will help you connect them so they behave as one.
Ask a questionCorenexis is a technology company building developer APIs, secure sign-in for apps and smart products like Cashly. Founded by Raushan together with his partner Shyamini, we make powerful technology accessible and practical for everyone.
To build accessible, developer-friendly APIs and smart products that help businesses and people achieve more, without unnecessary complexity.
A digital world where powerful technology is available to everyone, from developers shipping products to people managing their money.
Innovation, simplicity, security and accessibility drive everything we build.
Start with the APIs, add Corenexis sign-in to your app, or try Cashly for smarter money tracking.