Increase
Increase is a bank-grade payments and financial infrastructure platform that exposes a single REST API for moving and holding money in the United States - ACH transfers, real-time payments (RTP and FedNow), domestic and international wires, physical and mailed checks, deposit accounts and account numbers, card issuing and card acquiring, ledgering and bookkeeping, KYC/KYB entities, and lockboxes. Increase connects directly to the Federal Reserve and card networks through partner banks, and every state change is delivered as an Event over HTTP webhooks. The API is documented with a public OpenAPI 3.1 spec (https://api.increase.com/openapi.json) and Stainless-generated SDKs for Python, TypeScript, Java, Kotlin, Go, Ruby, PHP, and C#. Base URL https://api.increase.com with a sandbox at https://sandbox.increase.com.
Increase publishes 16 APIs on the APIs.io network, including Account Numbers API, Accounts API, ACH Transfers API, and 13 more. Tagged areas include Payments, Banking, Financial Infrastructure, ACH, and Wire Transfers.
Increase’s developer surface includes authentication, documentation, engineering blog, and 9 more developer resources.
Kin Score
APIs 16
Individual APIs this provider publishes, each with its own machine-readable definition.
Increase Account Numbers API
Routing and account number pairs that can receive funds.
Increase Accounts API
Deposit accounts held at Increase partner banks.
Increase ACH Transfers API
FedACH credit and debit transfers, inbound and outbound.
Increase Bookkeeping API
Double-entry sub-ledger built on Increase money movement.
Increase Card Payments API
Card authorization and settlement lifecycle.
Increase Card Profiles API
Digital and physical card profiles and wallet tokens.
Increase Cards API
Virtual and physical commercial cards.
Increase Check Transfers API
Printed and mailed checks and check deposits.
Increase Entities API
KYC/KYB entities that own accounts.
Increase Events API
Events and webhook Event Subscriptions.
Increase External Accounts API
Counterparty bank accounts you send to or debit.
Increase Lockboxes API
Physical lockbox addresses and inbound mail.
Increase Real-Time Payments API
Instant RTP transfers, inbound and outbound.
Increase Simulations API
Sandbox-only endpoints for deterministic testing.
Increase Transactions API
Settled, pending, and declined ledger transactions.
Increase Wire Transfers API
Fedwire transfers and drawdown requests.
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Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Increase API
OPEN COLLECTIONPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Increase Com Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Increase Com Finops
FINOPSSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API