BetaThe V4 API is in beta — endpoints and functionality may change.
Contactsv4

Add contact tags

POST/contacts/{contactId}/tags

Path parameters

contactIdRequiredstring

Unique identifier of the contact, prefixed with ct_. Returned when you create a contact or by the List contacts endpoint.

Headers

AuthorizationRequiredstring

Your API key, sent as a bearer token: Authorization: Bearer <api_key>. Editing this stays in sync with the API key box on the right.

Bearer

Body parameters

JSON
tagsoptionalstring[]
tagoptionalstring

Returns

dataoptionalstring[]

Response codes

200Merged tags
401Your API key is missing or invalid. Pass it as a bearer token.
404No contact was found with the provided `contactId`.
422Validation failed — one or more fields in the request are invalid or missing.

Sends a live request with your values and shows the real response below. Your key is stored only in this browser.

Request
curl -X POST https://api.blooio.com/v4/contacts/ct_a1b2c3d4/tags \  -H "Authorization: Bearer bl_live_..." \  -H "Content-Type: application/json" \  -d '{    "tags": [      "string"    ],    "tag": "vip"  }'
Body object
Response objectexample
{  "data": [    "string"  ]}