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Slash Invoice API

The Invoice API from Slash — 13 operation(s) for invoice.

Slash Invoice API is one of 26 APIs that Slash publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Invoice. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, a getting-started guide, and authentication docs.

This API exposes 19 operations across 13 paths, and defines 46 schemas. It is described by OpenAPI 3.2.0, at version 0.0.1.

Requests are made against a single base URL, https://api.slash.com.

19 operations 13 paths 46 schemas 7 GET2 PATCH9 POST1 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
0.0.1
Base URL
https://api.slash.com
Authentication
API Key, API Key, HTTP Bearer, HTTP Basic
Resource Areas
1

Authentication & Security 4

Slash Invoice API declares 4 security schemes for authenticating requests. An API key is passed in the header as X-API-Key (api_key). An API key is passed in the header as X-API-Key (partner_api_key). It accepts HTTP bearer tokens (bearer). It accepts HTTP basic authentication (developer_application). By default, every request must be authenticated.

  • api_key — API key authentication for public API requests. Keys come in two flavors: - Legal-entity-scoped keys are pinned to a single legal entity. Minted via the dashbo…
  • partner_api_key — Partner-program API key authentication. Keys are minted in the partner dashboard (Developers → API Keys), are scoped to a single partner program, and are prefi…

Paths & Operations 19

Across 13 paths, the API surfaces 19 operations — 7 GET, 2 PATCH, 9 POST, 1 PUT. Each is listed below with its method, path, parameters, and response codes.

Invoice 19
GET
/invoice
List all invoices for your legal entity. Supports pagination and filtering by status, customer, and account.
8 params → 200401403429500
POST
/invoice
Create a new invoice.
body → 200401403429500
GET
/invoice/{invoiceId}
Get a single invoice by ID.
1 param → 200401403429500
PATCH
/invoice/{invoiceId}
Update an existing invoice. You can update the account, details, payment methods, and auto-pull settings.
1 param body → 200401403429500
POST
/invoice/{invoiceId}/void
Void an invoice. A voided invoice can no longer be paid.
1 param → 200401403429500
POST
/invoice/{invoiceId}/reconcile
Manually reconcile (link) transactions to an invoice. This marks the invoice as having received payment for the linked transactions.
1 param body → 200401403429500
POST
/invoice/{invoiceId}/unreconcile
Unreconcile (unlink) transactions from an invoice. This removes the payment association for the specified transactions.
1 param body → 200401403429500
GET
/invoice/{invoiceId}/send-reminder
Get the next scheduled automatic reminder date for an invoice
1 param → 200401403429500
POST
/invoice/{invoiceId}/send-reminder
Manually send a reminder email for an invoice. Rate limited to one reminder per invoice per 24 hours.
1 param → 200401403429500
GET
/invoice/settings
Get the current invoice display settings for your legal entity.
1 param → 200401403429500
PUT
/invoice/settings
Update invoice display settings for your legal entity. These settings control the branding and default values used when creating invoices.
1 param body → 200401403429500
POST
/invoice/settings/logo
Upload a logo image for invoice branding. Accepts PNG, JPEG, SVG, and WebP formats up to 2MB.
1 param body → 200401403429500
GET
/invoice/validate-number
Check whether an invoice number is available (not already in use) for your legal entity.
2 params → 200401403429500
GET
/invoice/series
List all invoice series (recurring invoice configurations) for your legal entity. Supports pagination and filtering by status, customer, and account.
8 params → 200401403429500
POST
/invoice/series
Create a new invoice series (recurring invoice). The series will automatically generate invoices according to the specified recurrence rule.
body → 200401403429500
GET
/invoice/series/{invoiceSeriesId}
Get a single invoice series by ID.
1 param → 200401403429500
PATCH
/invoice/series/{invoiceSeriesId}
Update an existing invoice series. You can update the recurrence rule, payment terms, template, payment methods, and end condition. The contact cannot be changed after creation.
1 param body → 200401403429500
POST
/invoice/series/{invoiceSeriesId}/cancel
Cancel an invoice series. Already-generated invoices are not affected. The next scheduled (unpaid) invoice will be voided.
1 param → 200401403429500
POST
/invoice/series/{invoiceSeriesId}/skip-next
Skip the next scheduled occurrence in a series. The scheduled invoice is voided and the series advances to the following occurrence.
1 param → 200401403429500

Schemas 46

The contract defines 46 schemas that model the data the API accepts and returns. The most detailed are slashfi.models.entity.SlashAccount.Group.Model.yaml (15 properties), slashfi.models.entity.Invoice.InvoiceSeries.yaml (14 properties), slashfi.models.entity.Invoice.Invoice.yaml (12 properties), slashfi.models.entity.Invoice.InvoiceDetails.yaml (11 properties). Each schema is shown below with its type and property counts.

slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodCryptoDeposit.yaml
object
2 properties 2 required
slashfi.models.enums.OffRamp.Method.yaml
string
slashfi.models.entity.Invoice.InvoiceSeriesTemplate.yaml
object
Template data used to generate each invoice in a recurring series
3 properties 1 required
slashfi.models.entity.Invoice.InvoiceSeries.yaml
object
Invoice series model for API responses
14 properties 11 required
slashfi.models.entity.Invoice.InvoiceSeriesStatus.yaml
string
slashfi.models.entity.Subaccount.Id.yaml
string
Represent a Subaccount ID in the format of "subaccount102jifoij01"
Error
object
5 properties 4 required
slashfi.models.entity.IAddressModel.yaml
object
6 properties 4 required
slashfi.models.enums.SlashAccountType.yaml
string
slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodAchDebit.yaml
object
2 properties 2 required
slashfi.models.entity.Invoice.LineItemsAndTotals.yaml
object
5 properties 3 required
slashfi.models.entity.Invoice.InvoiceNumber.yaml
string
A user-defined invoice identifier. Allows uppercase letters (A-Z), numbers (0-9), dashes (-), and underscores ().
slashfi.models.entity.SlashAccount.Group.Avs.AvsSettings.yaml
object
3 properties 1 required
Pagination.PaginationResponse
object
Response sent when requesting a list of data
2 properties
slashfi.models.entity.SlashWalletAccount.yaml
object
10 properties 8 required
slashfi.models.entity.Invoice.InvoiceSeriesInput.yaml
object
Input for creating or editing a recurring invoice series
10 properties 7 required
slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodInboundInternationalWire.yaml
object
2 properties 2 required
slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodInboundAchTransfer.yaml
object
2 properties 2 required
slashfi.models.entity.Invoice.InvoiceAggregate.yaml
object
Aggregate model for an invoice
3 properties 3 required
slashfi.models.entity.Invoice.InvoiceSeriesEndCondition.yaml
Discriminated union defining when a recurring invoice series stops generating invoices
slashfi.models.enums.Crypto.Chain.yaml
string
slashfi.models.entity.Invoice.InvoiceDetails.yaml
object
11 properties 10 required
slashfi.models.entity.Invoice.InvoiceTransaction.yaml
slashfi.models.entity.Invoice.InvoiceSettingsData.yaml
object
Invoice display settings for a legal entity.
9 properties 3 required
slashfi.models.entity.Invoice.InvoiceSlashPaymentMethodConfig.yaml.properties.method
slashfi.models.entity.Invoice.InvoiceAccount.yaml
slashfi.models.entity.SlashAccount.Group.Avs.AvsConstraint.yaml
object
4 properties
slashfi.models.entity.Invoice.InvoiceTax.yaml
object
2 properties 2 required
slashfi.models.entity.Invoice.Invoice.yaml
object
Top-level invoice model
12 properties 6 required
slashfi.models.entity.Invoice.InvoiceSettings.yaml
object
Full invoice settings entity for a legal entity, including metadata.
5 properties 5 required
slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodInboundWireTransfer.yaml
object
2 properties 2 required
slashfi.models.entity.CardGroup.Restriction.yaml
string
slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodCardPayment.yaml
object
2 properties 2 required
slashfi.models.entity.Invoice.InvoiceSeriesRecurrenceRule.yaml
Discriminated union defining when a recurring invoice series issues invoices
slashfi.models.enums.SlashAccountGroupType.yaml
string
slashfi.models.enums.SlashAccountProvider.yaml
string
slashfi.models.entity.Invoice.PaymentMethod.PaymentMethodInboundRtp.yaml
object
2 properties 2 required
slashfi.models.entity.Invoice.InvoiceLineItem.yaml
object
4 properties 3 required
slashfi.models.entity.Subaccount.Model.yaml
object
7 properties 4 required
slashfi.models.entity.Invoice.Status.yaml
string
slashfi.models.entity.Invoice.InvoiceSlashPaymentMethodConfig.yaml
slashfi.models.entity.SlashAccount.Group.Model.yaml
object
15 properties 8 required
slashfi.models.entity.Invoice.InvoiceDiscount.yaml
slashfi.models.entity.Invoice.LineItemsAndTotalsInput.yaml
object
3 properties 1 required
slashfi.models.entity.Invoice.InvoiceReconciliationPaymentMethod.yaml
Payment methods for invoice reconciliation (includes Slash-trackable methods plus external-only options like 'other')
slashfi.models.entity.Invoice.InvoiceDetailsInput.yaml
object
8 properties 5 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

slash-invoice-api-openapi.yml Raw ↑

Other APIs Slash publishes across the network.

Slash Account API
Slash Agent Requests API
Slash Analytics API
Slash Card API
Slash Card Group API
Slash Card Product API
Slash Contact API
Slash Crypto API
Slash Customer API
Slash Developer Account API
Slash Developer Application API
Slash Expense Report API
Where this information came from

This is an independent, third-party profile of Slash Invoice API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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