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

# Rate Limits

Rate limiting is managed through a weighted scoring system, known as Compute Units (CUs). Each API request consumes a specified number of CUs, determined by the complexity of the request. This system is designed to accommodate basic requests while efficiently handling more computationally intensive operations.

## Rate Limit Tiers

The maximum CUs (rate-limiting score) for a user depends on their subscription level and is delineated in the following table:

| Subscription Level | Per Minute Limit (CUs) | Per Day Limit (CUs) |
| :- | :- | :- |
| Free | 8,000 | 1,200,000 |

> We are working on new subscription tiers with higher rate limits to support even greater request volumes.

## Rate Limit Categories

The CUs for each category are defined in the following table:

| Weight | CU Value |
| :- | :- |
| Free | 1 |
| Small | 20 |
| Medium | 100 |
| Large | 500 |
| XL | 1000 |
| XXL | 3000 |

## Rate Limits for Metrics Endpoints

The CUs for each route are defined in the table below:

| Endpoint | Method | Weight | CU Value |
| :- | :- | :- | :- |
| `/v2/health-check` | GET | Free | 1 |
| `/v2/chains` | GET | Free | 1 |
| `/v2/chains/{chainId}` | GET | Free | 1 |
| `/v2/chains/{chainId}/metrics/{metric}` | GET | Medium | 100 |
| `/v2/chains/{chainId}/teleporterMetrics/{metric}` | GET | Medium | 100 |
| `/v2/chains/{chainId}/rollingWindowMetrics/{metric}` | GET | Medium | 100 |
| `/v2/networks/{network}/metrics/{metric}` | GET | Medium | 100 |
| `/v2/chains/{chainId}/contracts/{address}/nfts:listHolders` | GET | Large | 500 |
| `/v2/chains/{chainId}/contracts/{address}/balances` | GET | XL | 1000 |
| `/v2/chains/43114/btcb/bridged:getAddresses` | GET | Large | 500 |
| `/v2/subnets/{subnetId}/validators:getAddresses` | GET | Large | 500 |
| `/v2/lookingGlass/compositeQuery` | POST | XXL | 3000 |

<Info> All rate limits, weights, and CU values are subject to change. </Info>


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