finance
19 services state an AI integration on their own pages.
Alpha Vantage
Stock, forex and crypto market data API.
Frankfurter
Free open-source API for foreign exchange reference rates published by the ECB.
Adyen
Payment processing platform for enterprises.
Alpaca
API-first stock and crypto brokerage.
Brex
Corporate cards and spend management.
Chargebee
Subscription billing and revenue management.
EODHD
Financial data APIs: end-of-day prices, fundamentals and news.
Financial Datasets
Stock market and financial statement API for AI agents.
Mollie
European payment service provider.
Plaid
Financial data network linking bank accounts to apps.
Razorpay
Indian payments gateway and business banking.
Square
Payments and point-of-sale platform for small businesses.
Checkout.com
Enterprise payment processing.
Coinbase Developer Platform
Crypto exchange; its developer platform includes agent tooling.
Klarna
Buy-now-pay-later and payments provider.
Kraken
Cryptocurrency exchange.
QuickBooks (Intuit)
Accounting software for small businesses from Intuit.
Visa
Card payments network.
Xero
Cloud accounting software for small businesses.
How finance services connect to assistants
Each of the 19 services above states at least one way in. Counted by kind:
MCP server — 10. A Model Context Protocol server: a standard interface that AI assistants such as Claude, ChatGPT and others can connect to, to call the service's tools directly.
ChatGPT app — 1. An app inside ChatGPT: the assistant can call the service while you chat, after you connect it.
Claude connector — 1. A connector in Claude: the assistant can read from or act in the service once you connect it.
OpenAPI description — 3. A published machine-readable API description that an agent can read to learn how to call the service.
llms.txt — 16. A plain-text guide at /llms.txt that tells AI systems what the site is and where its key pages are.
Public API — 5. A documented public API an agent can call, usually with a key from the service.