> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-22654f5b-docs-llms-scoped-indexes.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Properties and Constraints

> Properties and Constraints for CometChat REST API.

Properties and constraints for the Management APIs (Multi-Tenancy).

## App Management

| **Property** | **Constraints** |
| - | - |
| App name | Max 100 characters, UTF8mb4 (supports all languages and emojis) |
| App version | `v3` only |
| Maximum collaborators per app (team management) | 25 |

## Webhooks

| **Property** | **Constraints** |
| - | - |
| Maximum webhooks per app | 25 |
| Webhook URL | Valid URL, max 255 characters |
| Webhook ID | Max 50 characters, alphanumeric only, no spaces |
| Webhook authentication username | Max 50 characters, alphanumeric only, no spaces |
| Webhook authentication password | Max 100 characters, alphanumeric only, no spaces |


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