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PATCH
/
user-management
/
v1
/
watchlists
/
{id}
/
assets
Modify watchlist assets
curl --request PATCH \
  --url https://api.messari.io/user-management/v1/watchlists/{id}/assets \
  --header 'Content-Type: */*' \
  --header 'X-Messari-API-Key: <api-key>' \
  --data '
{
  "action": "add",
  "assetIds": [
    "<string>"
  ]
}
'
{
  "error": null,
  "data": {
    "id": "BA3FDA7B",
    "title": "DeFi Blue Chips",
    "assetIds": [
      "1e31218a-e44e-4285-820c-8282ee222035",
      "21c795f5-1bfd-40c3-858e-e9d7e820c6d0",
      "b3d5d66c-26a2-404c-9325-91dc714a722b"
    ],
    "createdAt": "2026-03-27T14:11:02.612968Z",
    "updatedAt": "2026-03-27T14:11:27.836661Z"
  }
}

Documentation Index

Fetch the complete documentation index at: https://docs.messari.io/llms.txt

Use this file to discover all available pages before exploring further.

​
Overview

Add or remove individual assets from a watchlist without replacing the entire asset list. This is useful for incrementally managing watchlist contents. The action field must be either add or remove, and assetIds specifies which asset UUIDs to add or remove.
To replace the entire asset list at once, use the Update Watchlist endpoint with the assetIds field instead.

Authorizations

​
X-Messari-API-Key
string
header
required

Path Parameters

​
id
string
required

Body

*/*
​
action
enum<string>
required
Available options:
add,
remove
​
assetIds
string[]
required

Response

Default response

​
data
object
required
​
error
string