API DIRECTORY · MONEY AND COMMERCE

Payments, Finance & Fintech

70 companies and tools in this category. Each listing links to the provider’s own website. Search the full directory

ADPPartner access
Payroll and HR
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source indexed · retrieval limited · checked 2026-10-23Provider approval or a commercial agreement may be required.
AdyenHosted API
Payment processing
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
AffirmHosted API
Buy now, pay later financing at checkout
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-27
AirwallexHosted API
Build cross-border payments, payouts and embedded-finance workflows using money-movement APIs.
Open documentation Pricing Status Details
Official documentation checked · checked 2026-10-25A client ID and API key obtain an access token; a sandbox is documented.
AlpacaHosted API
Trading and market data
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
Alpha VantageHosted API
Financial market data
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
Authorize.netHosted API
Payment gateway for card and eCheck processing
Open documentation Pricing Status Details
Official source checked · checked 2026-10-27
AvalaraHosted API
Sales tax calculation and compliance
Open documentation Pricing Status Details
Official source checked · checked 2026-10-27
BILLHosted API
Accounts payable and receivable automation
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-27
BinanceHosted API
Digital asset exchange integrations
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
BraintreeHosted API
Payments integration
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
BrexHosted API
Business banking/spend
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
CashfreeHosted API
Create payment, payout and identity-verification integrations using documented REST APIs.
Set up API access Docs Pricing — No pricing page listedStatus — No status page listedDetails
Official documentation checked · checked 2026-10-25API credentials select sandbox or production access; consult the linked authentication reference for each product.
ChargebeeHosted API
Automate subscription customers, plans, billing and invoices with a recurring-revenue API.
Open documentation Pricing Status Details
Official documentation checked · checked 2026-10-25Requires a Chargebee site and its environment-specific API key; a test-site quickstart is documented.
Checkout.comHosted API
Payment processing
Open documentation Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-23
CodatHosted API
Connect accounting, banking and commerce data to build lending and business-finance integrations.
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-25Codat API keys authenticate requests; customers connect their business-data sources through its authorization flow.
CoinbaseHosted API
Digital asset developer platform
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
CoinGeckoHosted API
Digital asset market data
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-23
Dodo PaymentsHosted API
Create checkout, payments and subscription-billing workflows with event webhooks.
Open documentation Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-25API keys authenticate requests; separate test and live API environments are documented.
DwollaHosted API
ACH and instant bank transfers
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-27
ExchangeRate-APIHosted API
Currency exchange data
Set up API access Docs Pricing — No pricing page listedStatus — No status page listedDetails
Official documentation checked · checked 2026-10-23
FinchHosted API
Connect employer HR and payroll systems to read organization, employee and payroll data.
Open documentation Pricing Status Details
Official documentation checked · checked 2026-10-25Finch Connect authorizes employer connections; exchange its authorization code for an API access token.
FinnhubHosted API
Market data
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
FlutterwaveHosted API
Integrate payment collections and transfers with documented payment APIs and test environments.
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-25API credentials are obtained from the developer dashboard; supported API versions have separate integration guides.
FrankfurterHosted API
Currency reference rates
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official documentation checked · checked 2026-10-23
FREDHosted API
Federal Reserve economic data
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
FreshBooksHosted API
Accounting integrations
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
GoCardlessHosted API
Bank payment collection
Open documentation Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-23
GustoHosted API
Payroll integrations
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
Interactive BrokersHosted API
Brokerage API
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
Kill BillSelf-hostedOpen source · Apache-2.0
Open-Source Subscription Billing & Payments Platform
Open documentation Pricing — No pricing page listedStatus — No status page listedSource code Details
Official source checked · checked 2026-11-10
KlarnaHosted API
Buy now, pay later payments
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-27
KrakenHosted API
Digital asset exchange integrations
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
LagoSelf-hostedOpen source · AGPL-3.0
Open Source Metering and Usage Based Billing API. Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics
Open documentation Pricing — No pricing page listedStatus — No status page listedSource code Details
Official source checked · checked 2026-11-10
Lemon SqueezyHosted API
Digital product payments
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
MarqetaHosted API
Card issuing and payment processing
Set up API access Docs Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-27
Massive (formerly Polygon.io)Hosted API
Market data
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
Mastercard Open Banking (Finicity)Partner access
Bank data access and account verification
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-27Provider approval or a commercial agreement may be required.
MercuryHosted API
Business banking/spend
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
Modern TreasuryHosted API
Payment operations: ACH, wires and reconciliation
Open documentation Pricing Status Details
Official source checked · checked 2026-10-27
MollieHosted API
Payment services
Open documentation Pricing Status Details
Official documentation checked · checked 2026-10-23
MXPartner access
Financial data aggregation and account verification
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-27Provider approval or a commercial agreement may be required.
NetSuiteHosted API
ERP
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
OpenFIGIHosted API
Map security identifiers to FIGIs for portfolio, reference-data and instrument-search tools.
Get an API key Docs Pricing — No pricing page listedStatus — No status page listedDetails
Official documentation checked · checked 2026-10-25Unauthenticated public requests are supported at lower limits; an optional API key raises limits.
OpenSanctionsHosted API
Screen entities against sanctions datasets and retrieve matched company or person records.
Set up API access Docs Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-25Hosted API requests require an API key; commercial access and public-interest API-key arrangements are documented.
PaddleHosted API
Software billing
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
PayPalHosted API
Payments and merchant integrations
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
PaystackHosted API
Accept payments, verify transactions and automate transfers or recurring-billing workflows.
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-25API requests use the account secret key in an Authorization bearer header.
PlaidHosted API
Financial account connectivity
Set up API access Docs Pricing Status Details
Official source checked · checked 2026-10-23
PolarHosted API
Build digital-product checkout, customer billing and subscription integrations.
Set up API access Docs Pricing Status Details
Official documentation checked · checked 2026-10-25Organization access tokens are sent as bearer tokens; sandbox and production API URLs are documented.
QuickBooks OnlineHosted API
Accounting
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
RampHosted API
Business banking/spend
Open documentation Pricing Status — No status page listedDetails
Official source indexed · retrieval limited · checked 2026-10-23
RazorpayHosted API
Payments and banking integrations
Set up API access Docs Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-23
RecurlyHosted API
Manage subscription purchases, billing accounts, invoices and recurring-payment workflows.
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-25API v3 uses HTTP Basic authentication with the API key as username and an empty password.
RevenueCatHosted API
In-app subscriptions
Set up API access Docs Pricing Status Details
Official source checked · checked 2026-10-23
RipplingPartner access
Payroll and HR
Open documentation Pricing Status Details
Official source indexed · retrieval limited · checked 2026-10-23Provider approval or a commercial agreement may be required.
RutterHosted API
Read and write accounting, commerce and payment-system data through one business integration API.
Open documentation Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-25Uses HTTP Basic authentication with the app client ID and client secret.
Schwab Trader APIHosted API
Brokerage API
Open documentation Pricing Status — No status page listedDetails
Official source indexed · retrieval limited · checked 2026-10-23
SquareHosted API
Payments and business tools
Get an API key Docs Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
StripeHosted API
Online payments and billing
Set up API access Docs Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
TaxJarHosted API
Sales tax calculation and filing
Open documentation Pricing Status Details
Official source checked · checked 2026-10-27
TrueLayerHosted API
Bank data and payments
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-23
Twelve DataHosted API
Market data
Get an API key Docs Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
UnitPartner access
Embedded banking: accounts, cards and payments
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-27Provider approval or a commercial agreement may be required.
WaveHosted API
Accounting/invoicing
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
WiseHosted API
Money transfer integrations
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
XenditHosted API
Build payment collection, subscription and payout integrations for supported markets.
Open documentation Pricing — No pricing page listedStatus Details
Official documentation checked · checked 2026-10-25API requests use account API keys; separate test and live keys are documented.
XeroHosted API
Accounting
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
Yahoo FinanceAccess needs review
Listed in the supplied document; current public API availability is not confirmed
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source indexed · retrieval limited · API access unverified · checked 2026-10-23Current public API access is unconfirmed; check the provider’s access options. The document identifies unofficial access.
YodleeHosted API
Financial data aggregation
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-27