Add one or more tags to a company without removing existing tags. Tags are created automatically if they don't exist.

Use Cases:

• Add category labels (e.g., "enterprise", "customer", "prospect")
• Mark status (e.g., "active", "at-risk", "expansion-opportunity")
• Track campaigns (e.g., "webinar-2025", "trade-show")
• Add industry segments (e.g., "saas", "fintech", "e-commerce")

Tag Management:

• Tags are case-sensitive
• This endpoint ADDS tags - it doesn't remove existing ones
• To remove tags, use the /companies/{id}/tags/delete endpoint
• Tags can contain letters, numbers, hyphens, and underscores

Example:

{
  "tags": ["enterprise", "customer", "expansion-opportunity"]
}