---
title: "Add seats"
method: POST
path: "/v1/billing/seats/add"
tags: ["Seats"]
---

# Add seats

`POST /v1/billing/seats/add`

## Request

- Base URL: `https://api.curviate.com`
- URL: `https://api.curviate.com/v1/billing/seats/add`
- Auth: HTTP bearer

Adds seats to the workspace's active subscription. A trialing workspace gets 409 TRIAL_ACTIVE_SEAT_LIMIT (buy to convert first). Every call buys the seats it asks for.

## Request body

- object
  - `qty` integer, required

## Response `200`

Seats added.

- object
  - `charged_today_eur` number, nullable, required: Amount collected right now, or null when nothing was collected today.
  - `next_invoice_at` string, date-time, nullable, required: Reserved for a future queued-proration date; always null today.
  - `seat_ids` string[], required: The newly created seat ids.
  - `safety_warning` SafetyWarning: Present on a successful response when this account crossed an account-safety ceiling while the affected budget row is on the default warn posture. The action still happened. Field-identical to the BUDGET_EXHAUSTED error body except that blocked is false and hint.message describes the outcome, so one branch handles both postures and switching the account to enforce is a configuration change rather than a client rewrite.
    - `row` string, nullable, required: The budget row that breached, for example profile_views or pending_invites. Null when the breach is not about a row: an activity_window warning on an action that spends no budget of its own (editing a message, dismissing a notification, a Recruiter or Sales Navigator admin action) is still governed by the hours the account works in. Read hint.parameter for what to change; whenever this is null it names posture, because the activity window edges are set per action type and this action has none, so the levers that reach it are the account timezone and posture.
    - `reset_at` string, nullable, required: The instant the refusal lifts: the window roll on a ceiling refusal, the next window open on an activity-window one. Null in the two cases no clock frees, the pending_invites gauge and InMail credits (row inmail).
    - `hint` object, required
      - `parameter` string, required: The settable parameter on PATCH /v1/{account_id}/safety-policy.
      - `message` string, required: What the condition is and what changing that parameter would do. This is the one field whose text differs from the BUDGET_EXHAUSTED refusal: here it says the action went through, and on a ceiling breach how far past the ceiling this row now stands, rather than telling you to set posture to warn when it already is. Branch on parameter, reason and blocked, never on this text.
    - `reason` 'ceiling' | 'activity_window', required: Which rule was crossed. ceiling means the row's configured limit is spent; activity_window means the account is outside the hours it works in, which is a different fact with a different remedy. hint.parameter names the right setting for each.
    - `blocked` boolean, required: Always false here. True on the BUDGET_EXHAUSTED refusal carrying the same payload.

## Other responses

- `400`: qty must be a whole number from 1 to 50.
- `401`: Missing or invalid API key.
- `402`: No active subscription, a past-due subscription, an account under dispute review, or the card was declined (no seats added).
- `409`: The workspace is on a free trial and cannot add seats. Buy a seat to convert to a paid subscription first.
- `413`: Payload too large, the request body exceeds the size limit.
- `429`: Rate limited, slow down and retry after the hinted delay.
- `502`: No seats were added. Branch on retry_likely_to_succeed. true: today's charge was refunded in full and the seat count was confirmed unchanged, so a retry is safe. false: whether today's charge went through could not be confirmed; a retry is a new purchase and could charge twice, so check your invoices first.
- `503`: The purchase could not be confirmed while another change was in progress (check the seat count before retrying), or the seat price is misconfigured on our side (nothing charged; contact support, retrying fails the same way).

---

[API](https://skmtc.dev/curviate/apis/curviate-api.md) · [All operations](https://skmtc.dev/curviate/apis/curviate-api/llms.txt) · [OpenAPI document](https://skmtc.dev/curviate/apis/curviate-api/revisions/eab848801d95?raw)