Change Firm Tier

POST/api/v1/billing/firm/change-tier

Upgrade or downgrade the firm's plan tier, in-app.

Swaps the per-client price, adds/removes the platform fee, and re-applies the current client quantity in one prorated Stripe update. Requires the caller to be an owner/admin of the firm. Blocks a downgrade that would drop the firm below its current client count.

Operation ID: change_firm_tier_api_v1_billing_firm_change_tier_post·View as markdown·OpenAPI slice

Authentication

Bearer token authentication. Pass your DayZero API token in the Authorization header and the target business UUID in x-business-id.

Request body

Schema: FirmTierChangeRequest

firm_plan_tierstringrequired: Target firm tier: 'firm_starter', 'firm_professional', or 'firm_enterprise'.

Responses

201Successful Response

Schema: SuccessEnvelope_ChangeFirmTierResponse_

successboolean
messagestring
codestring
dataChangeFirmTierResponse

422Validation Error

Schema: HTTPValidationError

detailarray · ValidationErrorValidationError

5 fields

locarray · string | integerrequired
msgstringrequired
typestringrequired
inputobject
ctxobject

Code samples

POST/api/v1/billing/firm/change-tier

bash

curl -X POST 'https://api.ondayzero.com/api/v1/billing/firm/change-tier' \
  -H 'Authorization: Bearer dz_your_token' \
  -H 'x-business-id: YOUR_BUSINESS_ID' \
  -H 'Content-Type: application/json' \
  -d '{
  "firm_plan_tier": "string"
}'