Build Fast. Ship Faster. API Express Docs.
Everything you need to integrate API Express into your product — authentication, error handling, webhooks, sandbox testing, and complete API references. Written for developers, by developers.
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Try any of the 10 APIs with mock data. Free in sandbox. No charges.
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Everything You Need to Know
Six documentation sections covering every aspect of integration, from authentication to SDKs.
Authentication
How to authenticate requests, manage API keys, use IP whitelisting, and rotate credentials securely.
Read guide →Error Codes
Complete reference of HTTP status codes, error responses, and recommended handling for each error type.
Read guide →Webhooks
How to receive real-time notifications for async operations like bulk verification, recharge completions, and status changes.
Read guide →Sandbox Testing
How to use our sandbox environment to test integrations with mock data before going live — no charges, no risk.
Read guide →Rate Limits
Understanding rate limits across plans, how to handle 429 errors, and when to request higher limits.
Read guide →SDKs & Libraries
Install our official Node.js, Python, and PHP SDKs, or explore community SDKs for other languages.
Read guide →Complete Endpoint Reference
Every API Express endpoint, base URL, and primary method — all in one place.
| API | Base Endpoint | Method | Doc |
|---|---|---|---|
| Mobile Recharge | /v1/recharge |
POST | View → |
| Vehicle RC Verification | /v1/rc/verify |
POST | View → |
| UPI / Bank Verification | /v1/bank/verify |
POST | View → |
| Telecom Operator | /v1/telecom/operator |
POST | View → |
| Fuel Price | /v1/fuel/price |
GET | View → |
| Commodity Price | /v1/commodity/{type} |
GET | View → |
| Weather | /v1/weather |
GET | View → |
| Air Quality | /v1/aqi |
GET | View → |
| KYC Verification | /v1/kyc/{doc} |
POST | View → |
| Cyber Security | /v1/security/risk |
POST | View → |
Copy. Paste. Ship.
Every API has code samples in four languages. Here's what a basic request looks like in each.
Documentation — Common Questions
Quick answers to the questions developers ask most often. Contact us if yours isn't here.
Sign up for a free account, get your API key instantly, and follow our quick start guide. Full documentation for every API is available at /docs. Your first 1,000 API calls are free with no credit card required.
API Express uses API key authentication. Include your key in the Authorization header as a Bearer token. All requests must use HTTPS with TLS 1.3. IP whitelisting is available on enterprise plans.
Yes. Every API has a sandbox environment that mirrors production exactly. Test with realistic mock data before writing a single line of production code. Sandbox calls are not charged.
Rate limits vary by plan: Free tier allows 10 requests per second and 1,000 calls per month. Growth plan allows 100 requests per second. Enterprise plans have custom rate limits with dedicated infrastructure.
Yes. Official SDKs are available for Node.js, Python, and PHP. Community SDKs exist for Go, Ruby, and Java. All SDKs are open-source and available on GitHub.
Webhooks send real-time notifications to your endpoint for async operations like bulk verification results and recharge completions. Payloads are signed with HMAC-SHA256 for security. Retry logic with exponential backoff is built in.
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