Slash
Slash is a business banking and finance platform for modern companies — startups, agencies, e-commerce sellers, and enterprises — combining business checking, unlimited virtual and physical corporate cards, ACH/wire and real-time payments, global USD accounts, stablecoin on/off ramps, treasury, invoicing, expense management, and reporting on one platform. Founded in 2021 and valued at $1.4B after a 2026 Series C led by Ribbit Capital, Slash exposes a REST API (currently in Beta) covering accounts, virtual accounts, cards and card groups, transactions, transfers, invoices, contacts and customers, expense reports, webhooks, and FDX-compliant financial data access — plus an official hosted MCP server, Agent Requests with human-in-the-loop approval, and Python and Node.js SDKs for AI-agent and programmatic integration.
Slash publishes 26 API contracts indexed on the APIs.io network, including Account API, Agent Requests API, Analytics API, and 23 more. Tagged areas include Company, Banking, Payments, Financial Services, and Fintech.
The Slash catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.
Slash’s developer surface includes documentation, API reference, getting-started guide, changelog, engineering blog, support, pricing, and 46 more developer resources.
What this lets a business do 4
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Payments | core | 28.4 (thin) | - | 1 |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards implemented 1
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 26
Individual APIs this provider publishes, each with its own machine-readable definition.
Slash Account API
The Account API from Slash — 4 operation(s) for account.
Slash Agent Requests API
The Agent Requests API from Slash — 2 operation(s) for agent requests.
Slash Analytics API
The Analytics API from Slash — 1 operation(s) for analytics.
Slash Card API
The Card API from Slash — 5 operation(s) for card.
Slash Card Group API
The Card Group API from Slash — 4 operation(s) for card group.
Slash Card Product API
The Card Product API from Slash — 1 operation(s) for card product.
Slash Contact API
The Contact API from Slash — 3 operation(s) for contact.
Slash Crypto API
The Crypto API from Slash — 1 operation(s) for crypto.
Slash Customer API
The Customer API from Slash — 3 operation(s) for customer.
Slash Developer Account API
The Developer Account API from Slash — 1 operation(s) for developer account.
Slash Developer Application API
The Developer Application API from Slash — 2 operation(s) for developer application.
Slash Expense Report API
The Expense Report API from Slash — 7 operation(s) for expense report.
Slash Fdx API
The Fdx API from Slash — 8 operation(s) for fdx.
Slash Invoice API
The Invoice API from Slash — 13 operation(s) for invoice.
Slash Legal Entity API
The Legal Entity API from Slash — 1 operation(s) for legal entity.
Slash Merchant API
The Merchant API from Slash — 2 operation(s) for merchant.
Slash Merchant Category API
The Merchant Category API from Slash — 1 operation(s) for merchant category.
Slash Task API
The Task API from Slash — 4 operation(s) for task.
Slash Tokens API
The Tokens API from Slash — 1 operation(s) for tokens.
Slash Transaction API
The Transaction API from Slash — 5 operation(s) for transaction.
Slash Transfer API
The Transfer API from Slash — 1 operation(s) for transfer.
Slash Transfers API
The Transfers API from Slash — 1 operation(s) for transfers.
Slash Virtual Account API
The Virtual Account API from Slash — 2 operation(s) for virtual account.
Slash Webhook API
The Webhook API from Slash — 2 operation(s) for webhook.
Slash .well Known API
The .well Known API from Slash — 1 operation(s) for .well known.
Slash Oauth2 API
The Oauth2 API from Slash — 2 operation(s) for oauth2.
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Postman Collections 26
Ready-to-run Postman collections for exercising this provider's APIs.
Slash Public Account API
POSTMANSlash Public Account Fdx API
POSTMANScroll for all 26
Open Collections 27
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONSlash Public Account API
OPEN COLLECTIONSlash Public Account Agent Requests API
OPEN COLLECTIONSlash Public Account Analytics API
OPEN COLLECTIONSlash Public Account Card API
OPEN COLLECTIONSlash Public Account Card Group API
OPEN COLLECTIONSlash Public Account Card Product API
OPEN COLLECTIONSlash Public Account Contact API
OPEN COLLECTIONSlash Public Account Crypto API
OPEN COLLECTIONSlash Public Account Customer API
OPEN COLLECTIONSlash Public Account Developer Account API
OPEN COLLECTIONSlash Public Account Developer Application API
OPEN COLLECTIONSlash Public Account Expense Report API
OPEN COLLECTIONSlash Public Account Fdx API
OPEN COLLECTIONSlash Public Account Invoice API
OPEN COLLECTIONSlash Public Account Legal Entity API
OPEN COLLECTIONSlash Public Account Merchant API
OPEN COLLECTIONSlash Public Account Merchant Category API
OPEN COLLECTIONSlash Public Account Oauth2 API
OPEN COLLECTIONSlash Public Account Task API
OPEN COLLECTIONSlash Public Account Tokens API
OPEN COLLECTIONSlash Public Account Transaction API
OPEN COLLECTIONSlash Public Account Transfer API
OPEN COLLECTIONSlash Public Account Transfers API
OPEN COLLECTIONSlash Public Account Virtual Account API
OPEN COLLECTIONSlash Public Account Webhook API
OPEN COLLECTIONSlash Public Account .well Known API
OPEN COLLECTIONScroll for all 27
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Slash MCP Server
Remote MCP server at mcp.slash.com over HTTP requiring an API key; 3 tools listed.
MCP SERVERPricing Plans 2
Published pricing tiers and plan structures.
Slash Plans Pricing
PLANSRate Limits 1
Documented rate limits and quota policies.
Slash Rate Limits
RATE LIMITSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Slash Webhooks
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Slash Context
JSON-LDSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Slash API Rules
SPECTRALOpenAPI Overlays 1
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
Slash Openapi Overlay
GENERATEDJSON Schema 51
Standalone JSON Schema definitions for this provider's data models.
Account
JSON SCHEMAAgentRequest
JSON SCHEMAAuthorizationWebhookConfig
JSON SCHEMAAuthorizationWebhook
JSON SCHEMABalance
JSON SCHEMACardGroup
JSON SCHEMACardGroupUtilization
JSON SCHEMACardModifier
JSON SCHEMACardProduct
JSON SCHEMACard
JSON SCHEMAContact
JSON SCHEMAAddress
JSON SCHEMAWallet
JSON SCHEMACustomer
JSON SCHEMADeveloperApplicationData
JSON SCHEMADeveloperApplicationModel
JSON SCHEMADeveloperApplicationType
JSON SCHEMADeveloperApplicationScope
JSON SCHEMAFeeTransaction
JSON SCHEMALegalEntity
JSON SCHEMAMerchantCategory
JSON SCHEMAMerchant
JSON SCHEMAPaginationResponse
JSON SCHEMAPartialSpendingConstraint
JSON SCHEMAPostRequest
JSON SCHEMAPostResponse
JSON SCHEMAAccount
JSON SCHEMAAccountWithBalance
JSON SCHEMADepositTransaction
JSON SCHEMAInvestmentTransaction
JSON SCHEMALineOfCreditTransaction
JSON SCHEMALoanTransaction
JSON SCHEMAUserInfoResponse
JSON SCHEMApaths.task._dto.TaskResponse
JSON SCHEMAParsedReceipt
JSON SCHEMAPublicExpenseReportWithMetadata
JSON SCHEMAReimbursementSource
JSON SCHEMAIAddressModel
JSON SCHEMAInvoiceAggregate
JSON SCHEMAInvoiceDetailsInput
JSON SCHEMAInvoiceSeriesInput
JSON SCHEMAInvoiceSeries
JSON SCHEMAInvoiceSettingsData
JSON SCHEMAInvoiceSlashPaymentMethodConfig
JSON SCHEMASpendingConstraint
JSON SCHEMATransaction
JSON SCHEMAVirtualAccountCommissionDetails
JSON SCHEMAVirtualAccountCommissionRule
JSON SCHEMAVirtualAccountModel
JSON SCHEMAVirtualAccount
JSON SCHEMAWebhook
JSON SCHEMAScroll for all 51
Security Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 10
Pagination, idempotency, versioning, errors, and events
Scroll for all 10
Build 7
SDKs, sample code, and the tooling you integrate with
Scroll for all 7
Access & Security 7
Authentication, authorization, and security posture
Scroll for all 7
Operate 6
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 5
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.