> ## 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. # Cancel an ACH transfer > Cancel an ACH transfer before it has been submitted to the payment network. A queued ACH can be canceled while awaiting destination details. Read [Queued payments](/docs/v2/money-movement/queued-payments) for the destination-waiting flow and cancellation behavior. ## OpenAPI ````yaml /openapi-v2.json post /v2/transfers/ach/{transferId}/cancel 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/transfers/ach/{transferId}/cancel: parameters: - name: x-legal-entity in: header required: true description: >- The legal entity to act on. Required on every request; a user API key can act on any legal entity its user has access to. schema: type: string pattern: ^le_[a-zA-Z0-9]+$ post: summary: Cancel an ACH transfer description: >- Cancel an ACH transfer before it has been submitted to the payment network. A queued ACH can be canceled while awaiting destination details. parameters: - name: transferId in: path required: true description: Transfer id with the `transfer_intent_` prefix. schema: type: string responses: '200': description: The canceled ACH transfer. content: application/json: schema: $ref: '#/components/schemas/transfer-ach' '400': $ref: >- #/components/responses/PublicApiV2Error400InvalidRequestShapeTransfersCancel '401': $ref: '#/components/responses/PublicApiV2Error401Unauthorized' '403': $ref: >- #/components/responses/PublicApiV2Error403ForbiddenTransferIpAllowlistRequiredForbiddenLegalEntityUserApiKeyRequired '404': $ref: '#/components/responses/PublicApiV2Error404NotFoundNotFoundNotEnabled' '409': $ref: '#/components/responses/PublicApiV2Error409Conflict' '429': $ref: '#/components/responses/PublicApiV2RateLimited' '500': $ref: '#/components/responses/PublicApiV2Error500Internal' components: schemas: transfer-ach: title: TransferAch description: An ACH transfer or a queued ACH awaiting destination details. allOf: - $ref: '#/components/schemas/transfer-base' - type: object properties: contactId: type: string description: Contact receiving the transfer. example: le_c_vendor123 destinationId: type: string description: Saved destination used for the transfer. example: le_contact_destination_bank123 type: type: string enum: - ach status: $ref: >- #/components/schemas/slashfi.models.entity.Transfer.AchStatus.yaml informationRequestId: type: string description: Information request backing a queued ACH transfer. example: le_c_info_req_vendor123 ach: type: object properties: speed: type: string enum: - standard companyEntryDescription: type: string companyDiscretionaryData: type: string addenda: type: string submitsAt: type: string format: date-time traceNumber: type: string returnCode: type: string returnReason: type: string required: - speed additionalProperties: false required: - type - status - ach transfer-base: title: TransferBase type: object properties: id: type: string description: Transfer id with the `transfer_intent_` prefix. example: transfer_intent_2rj4l7hmrrrcv accountId: type: string description: Account containing the source balance. example: sa_group_primary123 fromAccount: type: string description: Source virtual-account id, when the transfer is scoped to one. example: subaccount_operations123 amount: $ref: '#/components/schemas/Money' description: type: string description: Human-readable private transfer memo. example: Invoice 1042 statementDescriptor: type: string description: >- Statement or network descriptor supplied when the transfer was created. example: VENDOR PAYMENT transactionIds: type: array description: Transaction ids produced by this transfer. items: type: string description: Transaction id with the `agg_tx_` prefix. example: agg_tx_2rj4l7hmrrrcv createdAt: type: string format: date-time description: Time the transfer was created. submittedAt: type: string format: date-time description: Time the transfer was submitted for processing. settledAt: type: string format: date-time description: Time the transfer settled. failedAt: type: string format: date-time description: Time the transfer failed. canceledAt: type: string format: date-time description: Time the transfer was canceled. required: - id - accountId - amount - transactionIds - createdAt slashfi.models.entity.Transfer.AchStatus.yaml: type: string description: Lifecycle state of an ACH transfer. enum: - pending - pending_destination - pending_approval - in_review - scheduled - canceled - failed - settled - returned title: AchStatus 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 PublicApiV2ErrorForbidden: title: PublicApiV2ErrorForbidden description: >- The credential can see the resource but is not permitted to perform this action on it; the missing permission is not disclosed. 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. example: fromAccount id: type: string description: The identifier that field carried, when it is one. example: subaccount_source123 additionalProperties: false required: - code - details PublicApiV2ErrorTransferIpAllowlistRequired: title: PublicApiV2ErrorTransferIpAllowlistRequired description: >- The legal entity does not enforce an IP allowlist. Creating or cancelling transfers requires one, and the request must come from an allowlisted IP. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - ip_allowlist_required details: type: object properties: {} 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 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, it belongs to another legal entity, or the credential cannot view it. 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. example: destinationId id: type: string description: The identifier that field carried, when it is one. example: le_contact_destination_bank123 additionalProperties: false required: - code - details PublicApiV2ErrorNotFoundNotEnabled: title: PublicApiV2ErrorNotFoundNotEnabled description: Public API v2 is not enabled for the selected legal entity. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - not_found details: type: object properties: {} additionalProperties: false required: - code - details PublicApiV2ErrorConflict: title: PublicApiV2ErrorConflict description: >- The resource is not in a state that allows this action; `message` says which state blocks it, and `details.field` names the field that referenced it when one did. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - conflict details: type: object properties: field: type: string description: Dot path of the request field at fault. example: internationalWire.fxQuoteId id: type: string description: The identifier that field carried, when it is one. example: fx_quote_2rj4l7hmrrrcv additionalProperties: false required: - code - details PublicApiV2ErrorInternal: title: PublicApiV2ErrorInternal description: >- Slash could not complete the request. Quote `referenceId` when contacting Slash support. allOf: - $ref: '#/components/schemas/Error' - type: object properties: code: type: string enum: - internal details: type: object properties: {} additionalProperties: false required: - code - details Money: type: object description: A signed monetary amount expressed in minor units. properties: amount: type: integer description: Amount in the currency's minor units. currency: type: string pattern: ^[A-Z]{3}$ description: Uppercase ISO 4217 currency code. required: - amount - currency additionalProperties: false title: Money 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: PublicApiV2Error400InvalidRequestShapeTransfersCancel: 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 `transferId`: Expected a valid ID beginning with "transfer_intent_". details: /transferId: Expected a valid ID beginning with "transfer_intent_". 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 PublicApiV2Error403ForbiddenTransferIpAllowlistRequiredForbiddenLegalEntityUserApiKeyRequired: description: >- - `forbidden` — The credential can see the resource but is not permitted to perform this action on it; the missing permission is not disclosed. When the resource is a field of the request, `details` names that `field` and the `id` it received. - `ip_allowlist_required` — The legal entity does not enforce an IP allowlist. Creating or cancelling transfers requires one, and the request must come from an allowlisted IP. - `forbidden (legal entity)` — The credential is not permitted to act for the selected legal entity. - `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: forbidden allOf: - $ref: '#/components/schemas/PublicApiV2ErrorForbidden' - title: ip_allowlist_required allOf: - $ref: >- #/components/schemas/PublicApiV2ErrorTransferIpAllowlistRequired - title: forbidden (legal entity) allOf: - $ref: '#/components/schemas/PublicApiV2ErrorForbiddenLegalEntity' - title: user_api_key_required allOf: - $ref: '#/components/schemas/PublicApiV2ErrorUserApiKeyRequired' examples: forbidden: summary: forbidden value: code: forbidden message: >- This credential is not permitted to do that on `fromAccount` subaccount_source123. details: field: fromAccount id: subaccount_source123 referenceId: 4031-2alj5if ip_allowlist_required: summary: ip_allowlist_required value: code: ip_allowlist_required message: >- Transfer mutations require a user-scoped API key used from an IP on the legal entity’s allowlist. details: {} 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 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 PublicApiV2Error404NotFoundNotFoundNotEnabled: description: >- - `not_found` — No resource matches the identifier, it belongs to another legal entity, or the credential cannot view it. When the identifier is a field of the request, `details` names that `field` and the `id` it received. - `not_found (API not enabled)` — Public API v2 is not enabled for the selected legal entity. content: application/json: schema: anyOf: - title: not_found allOf: - $ref: '#/components/schemas/PublicApiV2ErrorNotFound' - title: not_found (API not enabled) allOf: - $ref: '#/components/schemas/PublicApiV2ErrorNotFoundNotEnabled' examples: not_found: summary: not_found value: code: not_found message: '`destinationId` le_contact_destination_bank123 was not found.' details: field: destinationId id: le_contact_destination_bank123 referenceId: 4041-2alj5if not_found_not_enabled: summary: not_found (API not enabled) value: code: not_found message: The requested resource was not found. details: {} referenceId: 4041-2alj5if PublicApiV2Error409Conflict: description: >- - `conflict` — The resource is not in a state that allows this action; `message` says which state blocks it, and `details.field` names the field that referenced it when one did. content: application/json: schema: $ref: '#/components/schemas/PublicApiV2ErrorConflict' examples: conflict: summary: conflict value: code: conflict message: The FX quote has already been used. details: field: internationalWire.fxQuoteId id: fx_quote_2rj4l7hmrrrcv referenceId: 4091-2alj5if PublicApiV2RateLimited: description: >- The request exceeded the applicable rate limit. The response body is plain text; clients must not depend on a response-body schema for this status. 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`. ````