---
title: HTTP API - Attachments
slug: cloud/http-api/attachments
docTags: 
createdAt: 2024-03-22T13:36:47.519Z
---

With the `ATTACHMENT` data type, you can link extensive binary data, such as avatar images, videos, and PDFs, to a document. 

This article provides an overview of the attachment-related endpoints and functionality available for the HTTP Data API.

Attachments consist of two distinct parts: *metadata* and a binary large object (*blob*) datastore. (See [ATTACHMENT](docId\:a6a5ZsVTwSJg4QjG87hiy))

# Uploading Attachments

Using the Multipart Form method, upload the raw binary contents of the file you want to attach:

:::hint{type="info"}
Although Ditto will eventually support attaching files of up to 20 MB in size, the current infrastructure supports only a 1 MB maximum limit. 
:::

```curl
curl -X POST "$HOST/api/v4/attachments/upload" \
  --header "Authorization: Bearer ${API_KEY}" \
  -F 'file=@post.png' 
#=> {"id": "RUGMUxzHDRH1x94uH_QcrkzUhV5-j6oFd1c9eAFMxNZDmQ", "len": 261322}
```

# Downloading Attachments

Using `/api/v4/attachment/{attachment_id}`, download attachments:

```curl
curl "$HOST/api/v4/attachments/${ATTACHMENT_ID}" \
  --header "Authorization: Bearer $API_KEY" \
  --output file.png
```