> ## Documentation Index > Fetch the complete documentation index at: https://help.dash.fi/llms.txt > Use this file to discover all available pages before exploring further. # Update a card > Allows updating a card. Supports updating the limit and categories. ## OpenAPI ````yaml https://api.dash.fi/v1/public/swagger/doc.json patch /cards/{card-id} openapi: 3.1.0 info: contact: email: support@dash.fi name: Dash.fi Support description: >- Service allows to fetch or operate on the data from the Dash.fi API. Requires API key authentication via Bearer token. Provide your API key as a Bearer token in the `Authorization` header. Example: `Authorization: Bearer YOUR_API_KEY` title: Public Dash.fi API version: '1.0' servers: - url: https://api.dash.fi/v1/public security: - BearerAuth: [] tags: - description: > Subscribe URLs to receive POSTed events as they happen in your account. Each endpoint subscribes to one or more **topics**; when a topic fires, Dash.fi delivers the event to your URL with a JSON body matching the topic's payload schema. There is no envelope — the body is the event payload directly. Event metadata (id, topic, timestamp, signature) is carried in headers. ### Topic → payload schema Topics are versioned: the format is `..v`. Breaking changes ship as a **new** topic (`.v2`) — the old version keeps delivering its existing schema until it's retired, so subscriptions are pinned and never shift schema underneath you. | Topic | Body schema | |---|---| | `card.financial_event.v1` | `CardFinancialEvent` — see `GET /cards/{id}/financial-events` in the **Card** section for the authoritative field list. | ### Delivery shape ``` POST HTTP/1.1 Content-Type: application/json X-Outpost-Event-Id: evt_abc123 X-Outpost-Topic: card.financial_event.v1 X-Outpost-Timestamp: 2026-05-05T10:00:00Z X-Outpost-Signature: v0= { ...payload matching the topic's schema... } ``` | Header | Meaning | |---|---| | `X-Outpost-Event-Id` | Stable event identifier — the same id is sent on retries. Use it to deduplicate; delivery is **at-least-once**. | | `X-Outpost-Topic` | The topic that fired this delivery. | | `X-Outpost-Timestamp` | RFC 3339 time the event was emitted. Reject deliveries where this drifts too far from your clock to mitigate replay. | | `X-Outpost-Signature` | `v0=` HMAC-SHA256 of the raw request body, keyed with your endpoint's signing secret. | ### Verifying the signature The signature is computed over the **raw request body**: ``` HMAC-SHA256(signing_secret, raw_body) ``` Encoded as hex, prefixed with `v0=`. **Use a constant-time comparison** to avoid timing attacks. `rawBody` is the unparsed request body — the exact `Buffer` or string you received over the wire, not a re-serialised JSON object. ```js import { createHmac, timingSafeEqual } from 'node:crypto'; function verify(rawBody, signatureHeader, secret) { if (!signatureHeader) return false; const expected = 'v0=' + createHmac('sha256', secret).update(rawBody).digest('hex'); // Header may carry multiple comma-separated signatures during a rotation window. return signatureHeader.split(',').some((sig) => { const got = Buffer.from(sig.trim()); const want = Buffer.from(expected); return got.length === want.length && timingSafeEqual(got, want); }); } ``` ### Secret rotation Rotating a signing secret keeps the previous secret valid for 24 hours so you can roll the new one out without dropped deliveries. During that window, the `X-Outpost-Signature` header carries comma-separated signatures (`v0=,v0=`); accept either. The new secret is shown **once** at rotation and is never retrievable later. name: Webhooks externalDocs: description: OpenAPI JSON Specification url: /v1/public/swagger/doc.json paths: /cards/{card-id}: patch: tags: - Card summary: Update a card description: Allows updating a card. Supports updating the limit and categories. parameters: - description: Card id in: path name: card-id required: true schema: type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/UpdateCardRequest' description: Card update request summary: request description: Card update request required: true responses: '204': description: No Content '400': content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' description: Response containing error code and message '401': content: application/json: schema: $ref: '#/components/schemas/UnauthorizedErrorResponse' description: Unauthorized error response '403': content: application/json: schema: $ref: '#/components/schemas/ForbiddenErrorResponse' description: Forbidden error response '404': content: application/json: schema: $ref: '#/components/schemas/NotFoundErrorResponse' description: Not found error response '500': content: application/json: schema: $ref: '#/components/schemas/InternalServerErrorResponse' description: Internal server error response security: - BearerAuth: [] components: schemas: UpdateCardRequest: properties: categories: description: >- Card categories. Categories have specific MCC restrictions. If provided, replaces existing categories. items: $ref: '#/components/schemas/CardCategory' type: array uniqueItems: false limit: $ref: '#/components/schemas/card.CardLimit' type: object ValidationErrorResponse: properties: code: type: string message: type: string required: - code type: object UnauthorizedErrorResponse: properties: code: example: unauthorized type: string message: example: authorization header not provided type: string required: - code type: object ForbiddenErrorResponse: properties: code: example: forbidden type: string message: example: access to this resource is not provided type: string required: - code type: object NotFoundErrorResponse: properties: code: example: not-found type: string message: example: resource was not found type: string required: - code type: object InternalServerErrorResponse: properties: code: example: internal-server-error type: string message: type: string required: - code type: object CardCategory: enum: - advertising - saas_software - shipping - cloud_computing - professional_services - airlines - books_and_newspapers - car_rental - car_services - charitable_donations - clothing - clubs_and_memberships - education - electronics - fees_and_financial_institutions - freight_moving_and_delivery_services - fuel_and_gas - general_merchandise - general_expenses - government_services - insurance - internet_and_phone - legal - lodging - medical - office_supplies_and_cleaning - other - parking - pet - restaurants - supermarkets_and_grocery_stores - taxes_and_tax_preparation - taxi_and_rideshare - travel_misc - utilities - entertainment type: string x-enum-varnames: - CardCategoryAdvertising - CardCategorySaaSSoftware - CardCategoryShipping - CardCategoryCloudComputing - CardCategoryProfessionalServices - CardCategoryAirlines - CardCategoryBooksAndNewspapers - CardCategoryCarRental - CardCategoryCarServices - CardCategoryCharitableDonations - CardCategoryClothing - CardCategoryClubsAndMemberships - CardCategoryEducation - CardCategoryElectronics - CardCategoryFeesAndFinancialInstitutions - CardCategoryFreightMovingAndDeliveryServices - CardCategoryFuelAndGas - CardCategoryGeneralMerchandiseCard - CardCategoryGeneralExpensesCard - CardCategoryGovernmentServices - CardCategoryInsurance - CardCategoryInternetAndPhone - CardCategoryLegal - CardCategoryLodging - CardCategoryMedical - CardCategoryOfficeSuppliesAndCleaning - CardCategoryOther - CardCategoryParking - CardCategoryPet - CardCategoryRestaurants - CardCategorySupermarketsAndGroceryStores - CardCategoryTaxesAndTaxPreparation - CardCategoryTaxiAndRideshare - CardCategoryTravelMisc - CardCategoryUtilities - CardCategoryEntertainment card.CardLimit: description: Card limit. properties: amount: description: Limit amount to set on card. Must be above zero. example: '300.00' type: string type: $ref: '#/components/schemas/CardLimitType' required: - amount - type type: object CardLimitType: description: Card limit type. Can be used to add a rolling limit to a card. enum: - daily - monthly - lifetime example: daily type: string x-enum-varnames: - CardLimitTypeDaily - CardLimitTypeMonthly - CardLimitTypeLifetime securitySchemes: BearerAuth: description: >- Type "Bearer" followed by a space and your API token. Obtain your key from the Dash.fi dashboard. Example: "Bearer YOUR_API_KEY" in: header name: Authorization type: apiKey ````