> ## Documentation Index > Fetch the complete documentation index at: https://docs.slash.com/llms.txt > Use this file to discover all available pages before exploring further. # Decline a 3D Secure challenge > Reject the purchase on the cardholder's behalf; the purchase is declined. Only a `pending` challenge can be decided, once, before its `expiresAt`. ## OpenAPI ````yaml /openapi-v2.json post /v2/three-ds-challenges/{challengeId}/decline openapi: 3.1.0 info: title: Slash Public API V2 description: >- Send money for a Slash legal entity. Every request uses an API key. Transfer creation returns a Transfer that links its resulting transactions. version: 0.0.1 servers: - url: https://api.slash.com description: production security: - api_key: [] paths: /v2/three-ds-challenges/{challengeId}/decline: parameters: - name: x-legal-entity in: header required: true description: >- The legal entity to act on. Required on every request except `GET /v2/legal-entities`, which lists the ids a user API key can send here: those of every legal entity its user has access to. schema: type: string pattern: ^le_[a-zA-Z0-9]+$ post: summary: Decline a 3D Secure challenge description: >- Reject the purchase on the cardholder's behalf; the purchase is declined. Only a `pending` challenge can be decided, once, before its `expiresAt`. parameters: - name: challengeId in: path required: true description: 3D Secure challenge id with the `three_ds_challenge_` prefix. schema: type: string responses: '200': description: The declined 3D Secure challenge. content: application/json: schema: $ref: '#/components/schemas/three-ds-challenge' '400': $ref: '#/components/responses/PublicApiV2Error400ThreeDsChallengesDecline' '401': $ref: '#/components/responses/PublicApiV2Error401Unauthorized' '403': $ref: '#/components/responses/PublicApiV2Error403ThreeDsChallengesDecline' '404': $ref: '#/components/responses/PublicApiV2Error404ThreeDsChallengesDecline' '409': $ref: >- #/components/responses/PublicApiV2Error409ThreeDsChallengeAlreadyDecidedThreeDsChallengeExpired '429': $ref: '#/components/responses/PublicApiV2RateLimited' '500': $ref: '#/components/responses/PublicApiV2Error500Internal' security: - api_key: [] components: schemas: three-ds-challenge: title: 3D Secure challenge description: >- A request to confirm a card purchase with 3D Secure. It must be approved or declined before `expiresAt`, about five minutes after it is requested; a challenge left unanswered is declined. type: object properties: id: type: string description: 3D Secure challenge id with the `three_ds_challenge_` prefix. example: three_ds_challenge_2rj4l7hmrrrcv cardId: type: string description: The card the purchase was made with, with the `c_` prefix. example: c_2rj4l7hmrrrcv status: type: string description: >- `pending` until it is decided. `approved` and `declined` record the decision. `expired` means it was not decided in time and the purchase was declined. `failed` means the decision could not be reported and the purchase was declined. enum: - pending - approved - declined - expired - failed merchant: type: object properties: description: type: string example: Acme Tickets location: type: object properties: country: type: string description: >- The merchant's three-letter ISO 3166-1 alpha-3 country code, such as `USA` or `GBR`. example: USA required: - country additionalProperties: false required: - description - location additionalProperties: false amount: $ref: '#/components/schemas/Money' expiresAt: type: string format: date-time description: The deadline to approve or decline the challenge. required: - id - cardId - status - merchant - amount - expiresAt additionalProperties: false Money: type: object description: A signed monetary amount expressed in minor units. properties: amount: type: integer description: Amount in the currency's minor units. currency: type: string pattern: ^[A-Z]{3}$ description: Uppercase ISO 4217 currency code. required: - amount - currency additionalProperties: false title: Money PublicApiV2ErrorInvalidRequestShape: title: PublicApiV2ErrorInvalidRequestShape description: >- 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. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - invalid_request details: type: object properties: {} additionalProperties: type: string required: - code - details PublicApiV2ErrorUnauthorized: title: PublicApiV2ErrorUnauthorized description: API key authentication is missing or invalid. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - unauthorized details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorFeatureNotEnabled: title: PublicApiV2ErrorFeatureNotEnabled description: >- The feature this request uses is not enabled for the legal entity. Contact Slash support to enable it. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - feature_not_enabled details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorForbidden: title: PublicApiV2ErrorForbidden description: >- 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. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - forbidden details: type: object properties: field: type: string description: Dot path of the request field at fault. id: type: string description: The identifier that field carried, when it is one. additionalProperties: false required: - code - details PublicApiV2ErrorForbiddenLegalEntity: title: PublicApiV2ErrorForbiddenLegalEntity description: The credential is not permitted to act for the selected legal entity. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - forbidden details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorNotAvailable: title: PublicApiV2ErrorNotAvailable description: >- Public API v2 is not yet available. Use [Public API v1](https://docs.slash.com/introduction) in the meantime. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - not_available details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorUserApiKeyRequired: title: PublicApiV2ErrorUserApiKeyRequired description: >- 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. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - user_api_key_required details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorNotFound: title: PublicApiV2ErrorNotFound description: >- No resource matches the identifier. When the identifier is a field of the request, `details` names that `field` and the `id` it received. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - not_found details: type: object properties: field: type: string description: Dot path of the request field at fault. id: type: string description: The identifier that field carried, when it is one. additionalProperties: false required: - code - details PublicApiV2ErrorThreeDsChallengeAlreadyDecided: title: three_ds_challenge_already_decided description: >- The 3D Secure challenge is no longer pending; `details.status` is its current status. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - three_ds_challenge_already_decided details: type: object properties: status: type: string description: The challenge’s current status. example: approved required: - status additionalProperties: false required: - code - details PublicApiV2ErrorThreeDsChallengeExpired: title: three_ds_challenge_expired description: >- A 3D Secure challenge must be approved or declined before its `expiresAt`, about five minutes after it is requested. Once it expires the purchase is declined; the cardholder can retry the purchase. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - three_ds_challenge_expired details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorInternal: title: PublicApiV2ErrorInternal description: >- Slash could not complete the request. Quote `referenceId` when contacting Slash support. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - internal details: type: object properties: {} additionalProperties: false required: - code - details Error: type: object properties: code: type: string description: >- Machine-readable reason; branch on this, not on `message`. Every code an endpoint can return is listed on its reference page; the ones shared by all endpoints are explained in the Errors guide. example: invalid_request message: type: string description: >- Human-readable explanation, safe to show to an operator. Wording may change; use `code` and `details` programmatically. details: type: object description: >- The values behind `message`, keyed per `code`. For example `insufficient_funds` carries `available` and `requested`; `invalid_request` from contract validation carries one entry per failing field, keyed by JSON pointer. Empty when the code has no variable data. additionalProperties: type: string example: available: $120.00 requested: $500.00 referenceId: type: string description: Unique id of this failure. Quote it when contacting Slash support. example: 4001-2alj5if required: - code - message - details - referenceId additionalProperties: false title: Error responses: PublicApiV2Error400ThreeDsChallengesDecline: description: >- - `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. content: application/json: schema: $ref: '#/components/schemas/PublicApiV2ErrorInvalidRequestShape' examples: invalid_request_request_shape: summary: invalid_request (request shape) value: code: invalid_request message: >- Invalid `challengeId`: Expected a valid ID beginning with "three_ds_challenge_". details: /challengeId: Expected a valid ID beginning with "three_ds_challenge_". referenceId: 4001-2alj5if PublicApiV2Error401Unauthorized: description: '- `unauthorized` — API key authentication is missing or invalid.' content: application/json: schema: $ref: '#/components/schemas/PublicApiV2ErrorUnauthorized' examples: unauthorized: summary: unauthorized value: code: unauthorized message: API key authentication is missing or invalid. details: {} referenceId: 4011-2alj5if PublicApiV2Error403ThreeDsChallengesDecline: description: >- - `feature_not_enabled` — The feature this request uses is not enabled for the legal entity. Contact Slash support to enable it. - `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. content: application/json: schema: anyOf: - title: feature_not_enabled allOf: - $ref: '#/components/schemas/PublicApiV2ErrorFeatureNotEnabled' - title: forbidden allOf: - $ref: '#/components/schemas/PublicApiV2ErrorForbidden' - title: forbidden (legal entity) allOf: - $ref: '#/components/schemas/PublicApiV2ErrorForbiddenLegalEntity' - title: not_available allOf: - $ref: '#/components/schemas/PublicApiV2ErrorNotAvailable' - title: user_api_key_required allOf: - $ref: '#/components/schemas/PublicApiV2ErrorUserApiKeyRequired' examples: feature_not_enabled: summary: feature_not_enabled value: code: feature_not_enabled message: >- This feature is not enabled for you. Please contact support to get it. details: {} referenceId: 4031-2alj5if forbidden_challenge_id: summary: forbidden (challengeId) value: code: forbidden message: >- This credential is not permitted to do that on `challengeId` three_ds_challenge_2rj4l7hmrrrcv. details: field: challengeId id: three_ds_challenge_2rj4l7hmrrrcv referenceId: 4031-2alj5if forbidden_legal_entity: summary: forbidden (legal entity) value: code: forbidden message: This credential is not permitted to do that. details: {} referenceId: 4031-2alj5if not_available: summary: not_available value: code: not_available message: >- Public API v2 is not yet available. Use Public API v1 (https://docs.slash.com/introduction) in the meantime. details: {} referenceId: 4031-2alj5if user_api_key_required: summary: user_api_key_required value: code: user_api_key_required message: >- Public API v2 requires a user API key. Create one under Settings → API keys in the Slash dashboard. details: {} referenceId: 4031-2alj5if PublicApiV2Error404ThreeDsChallengesDecline: description: >- - `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. content: application/json: schema: $ref: '#/components/schemas/PublicApiV2ErrorNotFound' examples: not_found_challenge_id: summary: not_found (challengeId) value: code: not_found message: '`challengeId` three_ds_challenge_2rj4l7hmrrrcv was not found.' details: field: challengeId id: three_ds_challenge_2rj4l7hmrrrcv referenceId: 4041-2alj5if PublicApiV2Error409ThreeDsChallengeAlreadyDecidedThreeDsChallengeExpired: description: >- - `three_ds_challenge_already_decided` — The 3D Secure challenge is no longer pending; `details.status` is its current status. - `three_ds_challenge_expired` — A 3D Secure challenge must be approved or declined before its `expiresAt`, about five minutes after it is requested. Once it expires the purchase is declined; the cardholder can retry the purchase. content: application/json: schema: anyOf: - title: three_ds_challenge_already_decided allOf: - $ref: >- #/components/schemas/PublicApiV2ErrorThreeDsChallengeAlreadyDecided - title: three_ds_challenge_expired allOf: - $ref: >- #/components/schemas/PublicApiV2ErrorThreeDsChallengeExpired examples: three_ds_challenge_already_decided: summary: three_ds_challenge_already_decided value: code: three_ds_challenge_already_decided message: The 3D Secure challenge is no longer pending; it is approved. details: status: approved referenceId: 4091-2alj5if three_ds_challenge_expired: summary: three_ds_challenge_expired value: code: three_ds_challenge_expired message: The 3D Secure challenge has expired. details: {} referenceId: 4091-2alj5if PublicApiV2RateLimited: description: >- The request exceeded the applicable rate limit. The response body is plain text, not the error object; clients must not depend on its wording. content: text/plain: schema: type: string example: You are rate limited PublicApiV2Error500Internal: description: >- - `internal` — Slash could not complete the request. Quote `referenceId` when contacting Slash support. content: application/json: schema: $ref: '#/components/schemas/PublicApiV2ErrorInternal' examples: internal: summary: internal value: code: internal message: >- An unexpected error occurred. If this keeps happening, contact Slash support with the reference id below. details: {} referenceId: 5001-2alj5if securitySchemes: api_key: type: apiKey name: X-API-Key in: header description: >- User API key authentication. Create a key under Settings → API keys in the Slash dashboard (https://app.slash.com/global-settings/api-keys) and send the `x-legal-entity` header naming the legal entity to act on with every request. Keys scoped to a legal entity are rejected with `403 user_api_key_required`. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.