# ValidKit - Email Validation API for AI Agents

## Overview
ValidKit is the email validation infrastructure built specifically for AI agents. We process 10,000+ emails in under 5 seconds with token-optimized responses.

## Key Features
- Bulk validation up to 100K emails per request
- Token-efficient responses (80% smaller than competitors)
- 99.9% uptime SLA for paid plans
- Native integration with ChatGPT, Zapier AI, and MCP protocols
- Real-time validation with sub-500ms response times

## API Access
Base URL: https://api.validkit.com

### Authentication
All requests require an API key in the X-API-Key header.

### Quick Start
```bash
# Get your API key (free tier includes 10K/month)
curl -X POST https://api.validkit.com/v1/keys/create

# Single email validation
curl -X POST https://api.validkit.com/v1/verify \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "test@example.com"}'

# Bulk validation (up to 100K emails)
curl -X POST https://api.validkit.com/v1/verify/bulk \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"emails": ["test@example.com", "invalid@"], "format": "compact"}'
```

## Main Endpoints
- POST /v1/verify - Single email validation
- POST /v1/verify/bulk - Bulk validation (10-100K emails)
- GET /v1/pricing - Current pricing tiers
- GET /v1/usage - Check API usage and limits
- GET /health - API health status

## Response Format
We optimize for AI token efficiency with compact responses:
```json
{
  "valid": true,
  "reason": "deliverable",
  "disposable": false,
  "role": false,
  "free": false
}
```

## SDKs
- Python: `pip install validkit`
- Node.js: `npm install @validkit/sdk`
- Direct REST API: https://api.validkit.com

## Pricing Tiers
- **Free**: 10K/month, 3 req/sec
- **Growth**: $19/month, 50K/month, 1K req/min
- **Starter**: $29/month, 100K/month, 1K req/min
- **Pro**: $99/month, 500K/month, 10K req/min
- **Scale**: $299/month, 2M/month, 100K req/min
- **Enterprise**: $1500+/month, 5M+/month, custom limits

## Rate Limits
Rate limits vary by tier:
- Free: 180 requests/minute
- Growth/Starter: 1,000 requests/minute
- Pro: 10,000 requests/minute
- Scale: 100,000 requests/minute
- Enterprise: 1,000,000 requests/minute

## Integration Examples

### ChatGPT Custom GPT
```yaml
openapi: 3.0.0
servers:
  - url: https://api.validkit.com
paths:
  /v1/verify:
    post:
      operationId: verifyEmail
      x-openai-isConsequential: false
```

### Zapier AI Actions
Use our Zapier integration for no-code email validation in your Zaps.

### MCP (Model Context Protocol)
Native MCP server available for Claude Desktop and other MCP-compatible tools.

## Use Cases
- Lead validation before CRM import
- User registration verification
- Email list cleaning
- Bulk data processing
- Marketing campaign preparation

## Documentation
Full API documentation: https://docs.validkit.com
OpenAPI spec: https://api.validkit.com/v1/openapi.json

## Support
- Email: developers@validkit.com
- Status: https://status.validkit.com
- GitHub: https://github.com/validkit

## Legal
- Privacy Policy: https://validkit.com/privacy
- Terms of Service: https://validkit.com/terms
- GDPR Compliant with DPA available

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ValidKit - Email validation infrastructure for the AI agent era.