---
title: "Set a card PIN"
method: POST
path: "/v2/cards/{cardId}/pin"
---

# Set a card PIN

`POST /v2/cards/{cardId}/pin`

## Request

- Base URL: `https://api.slash.com`
- URL: `https://api.slash.com/v2/cards/{cardId}/pin`
- Auth: API key in header `X-API-Key`

Set the PIN of an active physical card.

## Path parameters

- `cardId` string, required

## Request body

- object
  - `pin` string, required

## Response `200`

The card.

- Card: A virtual or physical card. Its number and security code are only available from `GET /v2/cards/{cardId}/details`.
  - `id` string, required: Card id with the `c_` prefix.
  - `type` 'virtual' | 'physical', required
  - `status` 'pending' | 'awaiting_activation' | 'active' | 'paused' | 'inactive' | 'closed', required: `pending`: being issued, or waiting for a physical card's fee. `awaiting_activation`: a physical card its holder has not activated. `active`: approves authorizations. `paused`: declines them. `inactive`: deactivated by Slash or the issuer; can only be closed. `closed`: permanent.
  - `name` string, required
  - `last4` string: Absent on physical cards until they are activated.
  - `expiryMonth` integer
  - `expiryYear` integer
  - `accountId` string, required: Account id with the `sa_group_` prefix.
  - `virtualAccountId` string: Virtual account the card spends from, with the `subaccount_` prefix.
  - `cardGroupId` string: Card group id with the `card_group_` prefix.
  - `cardProductId` string: Card product id with the `card_product_` prefix.
  - `cardholderUserId` string: The user who holds the card, with the `u_` prefix.
  - `controls` CardControls: What the card may spend. The controls of its card group apply too. Replaced whole on update; `null` clears it.
    - `limit` CardControlsLimit: How much may be spent per period.
      - `amount` UsdMoney, required: A positive USD amount expressed in cents.
        - `amount` integer, required: Amount in cents. For example, `1250` represents USD 12.50.
        - `currency` 'USD', required
      - `period` 'daily' | 'weekly' | 'monthly' | 'yearly' | 'lifetime', required: Every period but `lifetime` resets at its boundary in `timezone`; `lifetime` never resets.
      - `startDate` string, date: Day the first period starts, today or earlier. Defaults to the start of the current period. Not used by `daily`.
      - `timezone` string: IANA timezone the period boundaries use. Defaults to UTC.
    - `transactionLimit` UsdMoney: A positive USD amount expressed in cents.
      - `amount` integer, required: Amount in cents. For example, `1250` represents USD 12.50.
      - `currency` 'USD', required
    - `merchantCategories` CardControlsRestriction: With `allow`, only the listed values are approved. With `block`, the listed values are declined.
      - `mode` 'allow' | 'block', required
      - `values` string[], required
    - `merchantCategoryCodes` CardControlsRestriction: With `allow`, only the listed values are approved. With `block`, the listed values are declined.
      - `mode` 'allow' | 'block', required
      - `values` string[], required
    - `merchants` CardControlsRestriction: With `allow`, only the listed values are approved. With `block`, the listed values are declined.
      - `mode` 'allow' | 'block', required
      - `values` string[], required
    - `countries` CardControlsRestriction: With `allow`, only the listed values are approved. With `block`, the listed values are declined.
      - `mode` 'allow' | 'block', required
      - `values` string[], required
    - `recurringPaymentsOnly` boolean: Approve recurring payments only. An Enterprise feature.
  - `singleUse` boolean, required: Whether the card closes after its first transaction. Virtual cards only.
  - `billingAddress` Address
    - `line1` string, required
    - `line2` string
    - `city` string, required
    - `state` string
    - `postalCode` string
    - `countryCode` string: ISO 3166-1 alpha-2 country code.
  - `physical` object: Present on physical cards.
    - `design` 'plastic' | 'silver_metal' | 'gold_metal', required
    - `secondLine` string: The line embossed under the holder's name.
    - `shipping` object
      - `address` Address, required
        - `line1` string, required
        - `line2` string
        - `city` string, required
        - `state` string
        - `postalCode` string
        - `countryCode` string: ISO 3166-1 alpha-2 country code.
      - `service` 'standard' | 'express' | 'priority', required
      - `status` 'pending' | 'shipped' | 'canceled', required: `pending`: ordered, not yet shipped.
      - `carrier` 'fedex' | 'usps'
      - `trackingNumber` string
      - `trackingUrl` string
      - `shippedAt` string, date-time
  - `closedReason` 'no_longer_needed' | 'lost_or_stolen' | 'never_arrived' | 'damaged' | 'closed_by_slash'
  - `createdAt` string, date-time, required
  - `closedAt` string, date-time

## Other responses

- `400`: - `invalid_request (request shape)` — The body, query, or headers failed validation, or a required header is missing. `details` has one entry per failing location, keyed by JSON pointer or header name.
- `401`: - `unauthorized` — API key authentication is missing or invalid.
- `403`: - `forbidden` — The credential is not permitted to perform this action on the resource. When the resource is a field of the request, `details` names that `field` and the `id` it received. - `forbidden (legal entity)` — The credential is not permitted to act for the selected legal entity. - `not_available` — Public API v2 is not yet available. Use [Public API v1](https://docs.slash.com/introduction) in the meantime. - `user_api_key_required` — The API key is scoped to a legal entity rather than a user. Every v2 request needs a user API key, created under Settings → API keys in the Slash dashboard, together with the `x-legal-entity` header.
- `404`: - `not_found` — No resource matches the identifier. When the identifier is a field of the request, `details` names that `field` and the `id` it received.
- `409`: - `account_locked` — Slash has locked the account, during a review or while it closes, so cards cannot be issued on it or changed. Contact Slash support. - `card_closed` — Closing is permanent; a closed card cannot change. - `card_not_active` — Only `active` cards can be paused or have a PIN set. - `card_not_physical` — Only physical cards can be replaced or have a PIN. Virtual cards are closed and issued again instead. - `card_status_pending` — An earlier status change has not finished at the card issuer. Retry once `GET /v2/cards/{cardId}` shows the new status.
- `429`: The request exceeded the applicable rate limit. The response body is plain text, not the error object; clients must not depend on its wording.
- `500`: - `internal` — Slash could not complete the request. Quote `referenceId` when contacting Slash support.

## Changes

- **2026-10-16** `8b5d371ffeea`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/slashfi/apis/slash-public-api/changes/v2/cards/:cardId/pin/post.md)

---

[API](https://skmtc.dev/slashfi/apis/slash-public-api.md) - [All operations](https://skmtc.dev/slashfi/apis/slash-public-api/llms.txt) - [OpenAPI document](https://skmtc.dev/slashfi/apis/slash-public-api/revisions/eaed2d63c9e2?raw)