Getting Started
Welcome to API Codex! We're excited to have you here. This guide will help you understand what we offer and how to get the most out of our APIs.
What is API Codex?
API Codex is a suite of production-ready APIs designed to help developers solve common challenges in their applications. Whether you're building an email marketing platform, a recruitment system, a financial application, or anything in between, we have APIs that can help.
Our APIs are hosted on RapidAPI, the world's largest API marketplace, which means you get:
- One account for all our APIs
- Unified billing and subscription management
- Free tiers to test and develop with
- Interactive playground to try before you code
- Auto-generated code snippets in 20+ languages
Our API Categories
Email APIs
Perfect for applications that need to validate, verify, or process emails:
- Email Intelligence - Validate email addresses, detect disposable emails, check domain reputation
- Email Deliverability - Test SMTP configuration, verify SPF/DKIM/DMARC, monitor blacklists
- Email Parser - Extract structured data from email content
Document Parsing APIs
Automate data extraction from documents with AI-powered parsing:
- Resume Parser - Extract skills, experience, education from resumes
- Invoice Parser - Pull line items, totals, vendor info from invoices
- Receipt Parser - Digitize receipts for expense tracking
- Skill Parser - Identify and categorize skills from any text
Text Intelligence APIs
Analyze and process text with advanced NLP:
- Text Analysis - Sentiment analysis, entity recognition, language detection
- Text Anonymization - Detect and redact PII for privacy compliance
Infrastructure APIs
Essential tools for web and network applications:
- DNS Lookup - Query DNS records, reverse lookups, domain info
- SERP API - Access search engine results programmatically
How It Works
Getting started with API Codex is straightforward:
1. Browse Our APIs
Explore our API Catalog to find the APIs that fit your needs. Each API page includes detailed documentation, example requests and responses, and pricing information.
2. Sign Up on RapidAPI
All our APIs are available through RapidAPI. Create a free account if you don't have one already.
3. Subscribe to an API
Choose a plan that works for you. Every API has a free tier so you can test and develop without any commitment. Upgrade when you're ready to scale.
4. Get Your API Key
Once subscribed, you'll get an API key from RapidAPI. This single key works across all API Codex APIs you subscribe to.
5. Start Building
Use the interactive playground on RapidAPI to test endpoints, then copy the auto-generated code snippets into your application. It's that simple!
Choosing the Right API
Not sure which API you need? Here's a quick guide:
| If you need to... | Use this API |
|---|---|
| Validate email addresses | Email Intelligence |
| Check email sending reputation | Email Deliverability |
| Parse email content | Email Parser |
| Extract data from resumes | Resume Parser |
| Process invoices automatically | Invoice Parser |
| Digitize receipts | Receipt Parser |
| Extract skills from text | Skill Parser |
| Analyze sentiment/entities | Text Analysis |
| Anonymize sensitive data | Text Anonymization |
| Query DNS records | DNS Lookup |
| Get search engine results | SERP API |
What Makes API Codex Different?
Developer-Friendly
We design our APIs with developers in mind. Clear documentation, consistent response formats, helpful error messages, and comprehensive examples in multiple languages.
Production-Ready
Our APIs are built for reliability. We maintain high uptime, fast response times, and scale to handle whatever you throw at them.
Fair Pricing
Every API includes a free tier. No credit card required to get started. Pay only when you need more capacity.
Unified Experience
All our APIs follow consistent patterns for authentication, error handling, and response formats. Learn one, and you'll feel at home with all of them.
Ready to Dive In?
Here are your next steps:
Browse all available APIs with interactive documentation.
Understand how to authenticate your API requests.
Subscribe to APIs and start building today.
Need Help?
We're here to help you succeed:
- Documentation - Each API has comprehensive docs in our API Catalog
- Interactive Testing - Use RapidAPI's playground to test endpoints instantly
- FAQ - Check our frequently asked questions for quick answers
- Support - Reach out through RapidAPI for technical assistance
Welcome aboard! We can't wait to see what you build with API Codex.