> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-docsdy-1782656769-5d7a089.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Hybrid

> Self-host your Agent Servers and send traces to either a self-hosted LangSmith instance or LangSmith SaaS.

export const protocol_0 = undefined

export const prefix_0 = undefined

export const suffix_0 = undefined

In the **hybrid** model, you self-host your [Agent Servers](/langsmith/agent-server) in your own infrastructure and send traces to LangSmith, where LangSmith can be either a [self-hosted](/langsmith/self-hosted) instance or [LangSmith Cloud](/langsmith/cloud).

This gives you control over where your agent workloads run while letting you choose the LangSmith deployment that best fits your observability and compliance requirements.

## Components

| Component                                                                      | Where it runs                                         | Who manages it                        |
| ------------------------------------------------------------------------------ | ----------------------------------------------------- | ------------------------------------- |
| <Tooltip tip="The server that runs your applications.">Agent Servers</Tooltip> | Your infrastructure                                   | You                                   |
| LangSmith (tracing, evaluation, prompts)                                       | Self-hosted in your infrastructure, or LangSmith SaaS | You (self-hosted) or LangChain (SaaS) |

## Self-host your Agent Servers

Deploy standalone Agent Servers using Docker, Docker Compose, or Kubernetes. See the [standalone server guide](/langsmith/deploy-standalone-server) for prerequisites, environment variables, and platform-specific instructions.

## Choose where traces are sent

Agent Servers send traces to LangSmith based on the `LANGSMITH_ENDPOINT` environment variable:

* **LangSmith SaaS**: Omit `LANGSMITH_ENDPOINT` to use the default (GCP US), or set it to the endpoint for your region:

  <table>
    <thead>
      <tr>
        <th>Region</th>

        <th>
          {protocol_0 === false ? "Host" : "URL"}
        </th>
      </tr>
    </thead>

    <tbody>
      <tr>
        <td>GCP US</td>

        <td>
          <code>
            {`${protocol_0 === false ? "" : "https://"}${prefix_0 || "api.smith"}.langchain.com${suffix_0 || ""}`}
          </code>
        </td>
      </tr>

      <tr>
        <td>GCP EU</td>

        <td>
          <code>
            {`${protocol_0 === false ? "" : "https://"}eu.${prefix_0 || "api.smith"}.langchain.com${suffix_0 || ""}`}
          </code>
        </td>
      </tr>

      <tr>
        <td>GCP APAC</td>

        <td>
          <code>
            {`${protocol_0 === false ? "" : "https://"}apac.${prefix_0 || "api.smith"}.langchain.com${suffix_0 || ""}`}
          </code>
        </td>
      </tr>

      <tr>
        <td>AWS US</td>

        <td>
          <code>
            {`${protocol_0 === false ? "" : "https://"}aws.${prefix_0 || "api.smith"}.langchain.com${suffix_0 || ""}`}
          </code>
        </td>
      </tr>
    </tbody>
  </table>

* **Self-hosted LangSmith**: Set `LANGSMITH_ENDPOINT` to the hostname of your [self-hosted LangSmith](/langsmith/self-hosted) instance.

In both cases, authenticate with a [LangSmith API key](/langsmith/create-account-api-key) issued by the LangSmith instance you are tracing to.

***

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