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Assign Lead LabelBeta

Put a label on a lead.

POST/api/v1/leads/{lead_id}/labels/{label_id}

Path Parameters#

lead_idstringpathrequired

The lead id.

label_idstringpathrequired

The label id.

Adding is safe to repeat. Returns 204 with no body, and 404 if the lead or label is not in this workspace. To take a label off, see Unassign Lead Label. Filter leads by label with labelId on List Leads.

Rate Limit#

  • 120 requests per minute, shared by every write call in your workspace. Fixed 60-second window.
  • Every response includes X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset (unix epoch seconds) and X-RateLimit-Bucket (write).
  • A 429 response includes a Retry-After header (seconds until the bucket resets).

For client-side patterns, see Rate Limiting.

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View as MarkdownLast updated November 4, 2026