Files
coder/docs/reference/api/chats.md
T
Mathias Fredriksson a104d608a3 feat: add file/image attachment support to chat input (#22604)
This change adds support for image attachments to chat via add button
and clipboard paste. Files are stored in a new `chat_files` table and
referenced by ID in message content. File data is resolved from storage
at LLM dispatch time, keeping the message content column small.

Upload validates MIME types via content type or content sniffing against
an allowlist (png, jpeg, gif, webp). The retrieval endpoint serves files
with immutable caching headers. On the frontend, uploads start eagerly
on attach with a background fetch to pre-warm the browser HTTP cache so
the timeline renders instantly after send.
2026-03-06 21:05:26 +02:00

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# Chats
## Upload a chat file
### Code samples
```shell
# Example request using curl
curl -X POST http://coder-server:8080/api/v2/chats/files?organization=497f6eca-6276-4993-bfeb-53cbbbba6f08 \
-H 'Accept: application/json' \
-H 'Content-Type: string' \
-H 'Coder-Session-Token: API_KEY'
```
`POST /chats/files`
### Parameters
| Name | In | Type | Required | Description |
|----------------|--------|--------------|----------|-----------------------------------------------------------------------------------|
| `Content-Type` | header | string | true | Content-Type must be an image type (image/png, image/jpeg, image/gif, image/webp) |
| `organization` | query | string(uuid) | true | Organization ID |
### Example responses
> 201 Response
```json
{
"id": "497f6eca-6276-4993-bfeb-53cbbbba6f08"
}
```
### Responses
| Status | Meaning | Description | Schema |
|--------|----------------------------------------------------------------------------|--------------------------|------------------------------------------------------------------------------|
| 201 | [Created](https://tools.ietf.org/html/rfc7231#section-6.3.2) | Created | [codersdk.UploadChatFileResponse](schemas.md#codersdkuploadchatfileresponse) |
| 400 | [Bad Request](https://tools.ietf.org/html/rfc7231#section-6.5.1) | Bad Request | [codersdk.Response](schemas.md#codersdkresponse) |
| 401 | [Unauthorized](https://tools.ietf.org/html/rfc7235#section-3.1) | Unauthorized | [codersdk.Response](schemas.md#codersdkresponse) |
| 413 | [Payload Too Large](https://tools.ietf.org/html/rfc7231#section-6.5.11) | Request Entity Too Large | [codersdk.Response](schemas.md#codersdkresponse) |
| 500 | [Internal Server Error](https://tools.ietf.org/html/rfc7231#section-6.6.1) | Internal Server Error | [codersdk.Response](schemas.md#codersdkresponse) |
To perform this operation, you must be authenticated. [Learn more](authentication.md).
## Get a chat file
### Code samples
```shell
# Example request using curl
curl -X GET http://coder-server:8080/api/v2/chats/files/{file} \
-H 'Accept: */*' \
-H 'Coder-Session-Token: API_KEY'
```
`GET /chats/files/{file}`
### Parameters
| Name | In | Type | Required | Description |
|--------|------|--------------|----------|-------------|
| `file` | path | string(uuid) | true | File ID |
### Example responses
> 400 Response
### Responses
| Status | Meaning | Description | Schema |
|--------|----------------------------------------------------------------------------|-----------------------|--------------------------------------------------|
| 200 | [OK](https://tools.ietf.org/html/rfc7231#section-6.3.1) | OK | |
| 400 | [Bad Request](https://tools.ietf.org/html/rfc7231#section-6.5.1) | Bad Request | [codersdk.Response](schemas.md#codersdkresponse) |
| 401 | [Unauthorized](https://tools.ietf.org/html/rfc7235#section-3.1) | Unauthorized | [codersdk.Response](schemas.md#codersdkresponse) |
| 404 | [Not Found](https://tools.ietf.org/html/rfc7231#section-6.5.4) | Not Found | [codersdk.Response](schemas.md#codersdkresponse) |
| 500 | [Internal Server Error](https://tools.ietf.org/html/rfc7231#section-6.6.1) | Internal Server Error | [codersdk.Response](schemas.md#codersdkresponse) |
To perform this operation, you must be authenticated. [Learn more](authentication.md).
## Archive a chat
### Code samples
```shell
# Example request using curl
curl -X POST http://coder-server:8080/api/v2/chats/{chat}/archive
```
`POST /chats/{chat}/archive`
### Responses
| Status | Meaning | Description | Schema |
|--------|-----------------------------------------------------------------|-------------|--------|
| 204 | [No Content](https://tools.ietf.org/html/rfc7231#section-6.3.5) | No Content | |
## Watch git changes for a chat
### Code samples
```shell
# Example request using curl
curl -X GET http://coder-server:8080/api/v2/chats/{chat}/git/watch \
-H 'Coder-Session-Token: API_KEY'
```
`GET /chats/{chat}/git/watch`
### Parameters
| Name | In | Type | Required | Description |
|--------|------|--------------|----------|-------------|
| `chat` | path | string(uuid) | true | Chat ID |
### Responses
| Status | Meaning | Description | Schema |
|--------|--------------------------------------------------------------------------|---------------------|--------|
| 101 | [Switching Protocols](https://tools.ietf.org/html/rfc7231#section-6.2.2) | Switching Protocols | |
To perform this operation, you must be authenticated. [Learn more](authentication.md).
## Unarchive a chat
### Code samples
```shell
# Example request using curl
curl -X POST http://coder-server:8080/api/v2/chats/{chat}/unarchive
```
`POST /chats/{chat}/unarchive`
### Responses
| Status | Meaning | Description | Schema |
|--------|-----------------------------------------------------------------|-------------|--------|
| 204 | [No Content](https://tools.ietf.org/html/rfc7231#section-6.3.5) | No Content | |