Update a tag
PUT
/api/v3/contacts/tags/{tagId}
const url = 'https://api.tryletterhead.com/api/v3/contacts/tags/1';const options = { method: 'PUT', headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'}, body: '{"api":true,"name":"highly-engaged-readers"}'};
try { const response = await fetch(url, options); const data = await response.json(); console.log(data);} catch (error) { console.error(error);}curl --request PUT \ --url https://api.tryletterhead.com/api/v3/contacts/tags/1 \ --header 'Authorization: Bearer <token>' \ --header 'Content-Type: application/json' \ --data '{ "api": true, "name": "highly-engaged-readers" }'Renames a tag and/or changes its display color. This changes the tag itself for every contact that carries it — it does not add or remove the tag from any contact.
This is a company-level (v3) write. Authenticate with a company API key as a Bearer token.
Authorizations
Section titled “Authorizations ”Parameters
Section titled “ Parameters ”Path Parameters
Section titled “Path Parameters ” tagId
required
integer
The tag’s numeric identifier.
Request Body required
Section titled “Request Body required ” Media type application/json
object
api
Required. Set to true to authenticate with an API key.
boolean
name
string
color
string
Example
{ "api": true, "name": "highly-engaged-readers"}Responses
Section titled “ Responses ”Tag updated
Media type application/json
object
items
object
id
integer
name
string
color
string
createdAt
string
updatedAt
string
message
string
total
integer
Example
{ "items": { "id": 7, "name": "highly-engaged-readers", "color": "#4287f5", "createdAt": "2026-04-30T15:01:21+00:00", "updatedAt": "2026-08-30T15:01:21+00:00" }, "message": "Tag updated.", "total": 1}Still can’t find what you need? Contact support.