The Toolkit for
Fintech Builders
Discover APIs, data sources, open data, and open-source projects that power payments, banking, lending, wealth, KYC, AML, and compliance infrastructure — curated for developers and AI agents.
14 categoriesacross payments, banking, lending, wealth & more
Showing 9 tools
Stripe
FeaturedFull-stack payments platform with APIs for accepting payments, managing subscriptions, and running a marketplace.
Plaid
Connect bank accounts and access financial data — transactions, balances, identity — via a unified open banking API.
Sardine
Real-time fraud and compliance platform with device intelligence, behavioral biometrics, and AML screening.
Alloy
Identity decisioning platform for KYC, KYB, and ongoing monitoring. Orchestrate 190+ data sources.
Polygon.io
Real-time and historical market data API for stocks, options, forex, and crypto with low-latency websocket feeds.
OpenFinTech.io
Open SourceOpen-source catalog of fintech providers, payment systems, and banking institutions with structured metadata.
Tink
PSD2-compliant open banking platform enabling account aggregation, payment initiation, and personal finance data.
Onfido
AI-powered identity verification and biometric authentication for global onboarding and ongoing KYC.
Mifos X
Open SourceOpen-source core banking platform for microfinance and community finance, with a REST API and mobile clients.
Browse by Category
View all categoriesPayments & Billing
42 tools
Banking & Open Finance
38 tools
Identity & KYC
27 tools
Fraud, Risk & AML
19 tools
Financial Data & Market Data
31 tools
Investing & Wealth
22 tools
Open Data & Public Finance
15 tools
Developer Infrastructure
24 tools