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

# Targets

> The models, tools, and other agents behind an instance.

Targets give an instance its capabilities. Each kind has its own endpoint:

* [Models](https://developers.telnyx.com/docs/agent-gateway/targets/models.md) share one OpenAI-compatible API at `{gateway_url}/v1`. The request's `model` selects the model.
* [Tools](https://developers.telnyx.com/docs/agent-gateway/targets/tools.md) from every MCP server and REST API added to the instance are combined into one MCP server at `{gateway_url}/mcp`.
* Agents Planned each have a path at `{gateway_url}/a2a/{agent}`, over agent-to-agent (A2A), and the instance forwards their requests.

The instance authenticates to each MCP server and API by the [outbound authentication](https://developers.telnyx.com/docs/agent-gateway.md#outbound-authentication) method set on it. The models are Telnyx-hosted and need no credentials.

[Allow lists](https://developers.telnyx.com/docs/agent-gateway/authorization/allow-lists.md) limit the models a key may use, and [tool permissions](https://developers.telnyx.com/docs/agent-gateway/authorization/tool-permissions.md) limit its tools and agents.