---
title: "Add a deployment adapter"
method: POST
path: "/v2/projects/{projectId}/endpoints/{endpointId}/deployments/{deploymentId}/adapters"
tags: ["DeploymentService"]
---

# Add a deployment adapter

`POST /v2/projects/{projectId}/endpoints/{endpointId}/deployments/{deploymentId}/adapters`

## Request

- Base URL: `https://api.together.ai`
- URL: `https://api.together.ai/v2/projects/{projectId}/endpoints/{endpointId}/deployments/{deploymentId}/adapters`
- Auth: HTTP bearer

Attaches a LoRA adapter to a deployment. If the deployment is at adapter capacity, force can evict the oldest adapter.

## Path parameters

- `projectId` string, required: Project identifier.
- `endpointId` string, required: Endpoint identifier.
- `deploymentId` string, required: Deployment identifier.

## Request body

- DEAddAdapterRequest: Configuration for attaching a LoRA adapter to a deployment that has adapter loading enabled.
  - `adapterModelId` string, required: Adapter model identifier to attach.
  - `adapterRevisionId` string: Optional adapter revision to pin. If omitted, the latest revision is resolved at request time.
  - `force` boolean: Whether to evict the oldest adapter if the deployment is at adapter capacity.

## Response `200`

OK

- DEAdapterEntry: Adapter attached to a deployment with desired revision and observed load state.
  - `adapterModelId` string, required: Adapter model identifier attached to the deployment.
  - `desiredRevisionId` string, required: Adapter revision pinned on the deployment.
  - `perCluster` DEDeploymentAdapterStatus[], required: Per-cluster adapter load state reported by the controller.
    - `adapterModelId` string, required: Adapter model identifier for this status row.
    - `clusterId` string, required: Cluster reporting this adapter status.
    - `realizedRevisionId` string: Adapter revision currently loaded on pods in this cluster.
    - `realizedEtag` string: Adapter row etag observed by the controller when it wrote this status.
    - `state` 'ADAPTER_LOAD_STATE_PENDING' | 'ADAPTER_LOAD_STATE_LOADING' | 'ADAPTER_LOAD_STATE_READY' | 'ADAPTER_LOAD_STATE_REMOVING' | 'ADAPTER_LOAD_STATE_FAILED', required: Current adapter load state in this cluster.
    - `reason` string: Stable reason code for the current adapter state.
    - `message` string: Human-readable details about the current adapter state.
    - `readyPodCount` integer, required: Number of pods with the adapter ready to serve.
    - `failedPodCount` integer, required: Number of pods that failed to load the adapter.
    - `totalPodCount` integer, required: Total pods expected to report adapter load state.
    - `loadedAt` string, date-time: Time when the adapter first reached READY in this cluster.
    - `updatedAt` string, date-time: Time when this adapter status was last updated.
    - `adapterModel` string: Resource name of the adapter model, using projects/{projectId}/models/{adapterModelId}.
    - `realizedRevision` string: Resource name of the adapter model revision currently loaded in this cluster, using projects/{projectId}/models/{adapterModelId}/revisions/{revisionId}.
    - `adapterValid` boolean: Optional inference-probe verdict for this adapter on this cluster; absent until validation concludes.
    - `adapterValidReason` string: Human-readable probe rejection detail when adapterValid is false.
  - `etag` string, required: Row-level etag required for UpdateAdapter and RemoveAdapter.
  - `adapterModel` string: Resource name of the adapter model, using projects/{projectId}/models/{adapterModelId}.
  - `desiredRevision` string: Resource name of the adapter model revision pinned on the deployment, using projects/{projectId}/models/{adapterModelId}/revisions/{revisionId}.
  - `id` string, required: Adapter attachment `dad_` id used by get, update, and remove; stale ids never address a replacement after remove and re-add.

## Other responses

- `default`: Default error response

## Changes

- **2026-10-22** `bb5257b3173a`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/together/apis/together-apis/changes/v2/projects/:projectId/endpoints/:endpointId/deployments/:deploymentId/adapters/post.md)

---

[API](https://skmtc.dev/together/apis/together-apis.md) - [All operations](https://skmtc.dev/together/apis/together-apis/llms.txt) - [OpenAPI document](https://skmtc.dev/together/apis/together-apis/revisions/93438ddac711?raw)