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Change subscription plan

Change the plan for an existing subscription with optional proration --- **Related endpoints** - `POST /subscriptions` — Create a new subscription - `GET /subscriptions` — List subscriptions - `GET /subscriptions/{id}` — Get subscription by ID - `PATCH /subscriptions/{id}` — Update subscription details - `DELETE /subscriptions/{id}` — Delete subscription - `POST /subscriptions/{id}/change-quantity` — Change subscription quantity - `POST /subscriptions/{id}/preview-renewal` — Preview subscription renewal - `POST /subscriptions/{id}/pause` — Pause subscription **Common errors** - `401 authentication_error` — missing, invalid, expired, or revoked credential. Codes: `authentication_failed`, `invalid_api_key`, `expired_api_key`, `api_key_revoked`, `session_invalid`, `merchant_required`. Carries a `WWW-Authenticate: Bearer` challenge. - `404 resource_missing` — the referenced resource does not exist or is not visible to your key. **Idempotency** Pass an `Idempotency-Key` header (UUID v4 recommended) to make retries safe. Keys are valid for 24 hours; see [the idempotency guide](/docs/fundamentals/idempotency).

POST
/subscriptions/{id}/change-plan

Change the plan for an existing subscription with optional proration

Related endpoints

  • POST /subscriptions — Create a new subscription
  • GET /subscriptions — List subscriptions
  • GET /subscriptions/{id} — Get subscription by ID
  • PATCH /subscriptions/{id} — Update subscription details
  • DELETE /subscriptions/{id} — Delete subscription
  • POST /subscriptions/{id}/change-quantity — Change subscription quantity
  • POST /subscriptions/{id}/preview-renewal — Preview subscription renewal
  • POST /subscriptions/{id}/pause — Pause subscription

Common errors

  • 401 authentication_error — missing, invalid, expired, or revoked credential. Codes: authentication_failed, invalid_api_key, expired_api_key, api_key_revoked, session_invalid, merchant_required. Carries a WWW-Authenticate: Bearer challenge.
  • 404 resource_missing — the referenced resource does not exist or is not visible to your key.

Idempotency

Pass an Idempotency-Key header (UUID v4 recommended) to make retries safe. Keys are valid for 24 hours; see the idempotency guide.

Authorization

x-api-key<token>

Your RevKeen merchant API key. Create and manage keys in Dashboard → Settings → Developer. Use rk_sandbox_* for staging/test and rk_live_* for production. The same key may be sent as Authorization: Bearer <key> if that suits your HTTP client better. A missing, invalid, expired, or revoked key returns 401 with a WWW-Authenticate: Bearer challenge; a valid key without the required scope returns 403.

In: header

Path Parameters

id*string

Subscription UUID

Formatuuid

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

Stuck on an error response? Ask the RevKeen assistant to explain it.
curl -X POST "https://api.revkeen.com/v2/subscriptions/00000000-0000-0000-0000-000000000000/change-plan" \
  -H "x-api-key: $REVKEEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "newPlanId": "00000000-0000-0000-0000-000000000000"
  }'
{  "subscription": {    "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",    "merchant_id": "500924a8-3f5e-4c00-beb8-2efcde988aea",    "customer_id": "160c0c4b-9966-4dc1-a916-8407eb10d74e",    "product_id": "0d012afa-f885-4e65-aeca-37e27701e2d1",    "price_id": "5eff5d89-979e-4e4f-aa76-6cbbbf11362c",    "plan_id": "00713021-9aea-41da-9a88-87760c08fa72",    "status": "string",    "quantity": 0,    "amount_minor": 0,    "currency": "string",    "billing_interval": "string",    "current_period_start": "2019-08-24T14:15:22Z",    "current_period_end": "2019-08-24T14:15:22Z",    "trial_end": "2019-08-24T14:15:22Z",    "canceled_at": "2019-08-24T14:15:22Z",    "created_at": "2019-08-24T14:15:22Z",    "updated_at": "2019-08-24T14:15:22Z",    "dunning": {      "is_in_dunning": true,      "phase": 0,      "phase_label": "string",      "phase_severity": "info",      "retry_count": 0,      "total_possible_retries": 0,      "next_retry_at": "2019-08-24T14:15:22Z",      "days_in_dunning": 0,      "access_restricted": true    }  },  "proration": {},  "previousPlanId": "string",  "invoiceCreated": true}

Cancel subscription POST

Cancel a subscription either immediately or at the end of the current billing period. **Modes:** - `immediately`: Status set to "canceled", access revoked now - `period_end`: cancelAtPeriodEnd flag set, access continues until period end --- **Related endpoints** - `POST /subscriptions` — Create a new subscription - `GET /subscriptions` — List subscriptions - `GET /subscriptions/{id}` — Get subscription by ID - `PATCH /subscriptions/{id}` — Update subscription details - `DELETE /subscriptions/{id}` — Delete subscription - `POST /subscriptions/{id}/change-plan` — Change subscription plan - `POST /subscriptions/{id}/change-quantity` — Change subscription quantity - `POST /subscriptions/{id}/preview-renewal` — Preview subscription renewal **Common errors** - `400 invalid_request` — malformed payload or failed validation. - `401 authentication_error` — missing, invalid, expired, or revoked credential. Codes: `authentication_failed`, `invalid_api_key`, `expired_api_key`, `api_key_revoked`, `session_invalid`, `merchant_required`. Carries a `WWW-Authenticate: Bearer` challenge. - `404 resource_missing` — the referenced resource does not exist or is not visible to your key. **Idempotency** Pass an `Idempotency-Key` header (UUID v4 recommended) to make retries safe. Keys are valid for 24 hours; see [the idempotency guide](/docs/fundamentals/idempotency).

Change subscription quantity POST

Update the quantity for a subscription with optional proration --- **Related endpoints** - `POST /subscriptions` — Create a new subscription - `GET /subscriptions` — List subscriptions - `GET /subscriptions/{id}` — Get subscription by ID - `PATCH /subscriptions/{id}` — Update subscription details - `DELETE /subscriptions/{id}` — Delete subscription - `POST /subscriptions/{id}/change-plan` — Change subscription plan - `POST /subscriptions/{id}/preview-renewal` — Preview subscription renewal - `POST /subscriptions/{id}/pause` — Pause subscription **Common errors** - `401 authentication_error` — missing, invalid, expired, or revoked credential. Codes: `authentication_failed`, `invalid_api_key`, `expired_api_key`, `api_key_revoked`, `session_invalid`, `merchant_required`. Carries a `WWW-Authenticate: Bearer` challenge. - `404 resource_missing` — the referenced resource does not exist or is not visible to your key. **Idempotency** Pass an `Idempotency-Key` header (UUID v4 recommended) to make retries safe. Keys are valid for 24 hours; see [the idempotency guide](/docs/fundamentals/idempotency).