> ## Documentation Index
> Fetch the complete documentation index at: https://docs.etherscan.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Rate Limits

| API Tier         | Rate Limit                                                                         | API PRO       |
| ---------------- | ---------------------------------------------------------------------------------- | ------------- |
| Free             | 3 calls/second, up to 100,000 calls/day, [selected chains](/supported-chains) only | Not Available |
| Lite             | 5 calls/second, up to 100,000 calls/day                                            | Not Available |
| Standard         | 10 calls/second, up to 200,000 calls/day                                           | Available     |
| Advanced         | 20 calls/second, up to 500,000 calls/day                                           | Available     |
| Professional     | 30 calls/second, up to 1,000,000 calls/day                                         | Available     |
| Pro Plus         | 30 calls/second, up to 1,500,000 calls/day                                         | Available     |
| Dedicated/Custom | [**Contact Us**](mailto:apisupport@etherscan.io)                                   | Available     |