Finance APIs

Pulls insider trading records, earnings call transcripts, and SEC filing based financial statements into one feed, with a free tier of 5,000 API calls per month.

Free tier: 5,000 calls per month; higher volume needs a custom quote.

Streams realtime and historical quotes for stocks, forex, and crypto across 130 plus endpoints plus technical indicators, available in JSON or CSV output.

Free key works immediately; premium tiers add higher per minute limits, 150 to 1200 requests per minute.

Exposes Banco do Brasil account balances, statements, and payment initiation through a sandbox first developer portal built for fintech partners.

Sandbox is free; production needs an approved application and OAuth credentials.

Checks EU VAT numbers for validity and returns current standard and reduced VAT rates by country for pricing and invoicing calculations.

Free plan: 100 requests at 1 per second, no credit card required.

Creates and manages registered Brazilian boleto payments with built in Pix support, covering email delivery, bank registration, and reconciliation.

Free plan available, no credit card required to start.

Handles Malaysian bill collection, payouts, and tokenized card charges over a REST API secured with your secret key sent as the basic auth username.

Free sandbox with separate test credentials; production billing applies per collection.

Supplies realtime and historical stock prices plus full financial statements for public companies, built for screening and valuation models.

Free Basic plan: 250 requests per day, then 429 errors until the daily reset.

Streams realtime and historical pricing for stocks, crypto, forex, indices, and ETFs across 50 plus global markets and 120 plus exchanges.

3 day free trial on all plans, no credit card required.

Covers end of day and intraday pricing for 30,000 plus tickers and 70 plus exchanges worldwide, plus SEC filings, under one APILayer account.

Free plan: 100 requests per month, no credit card required.

Aggregates macroeconomic indicators and shipping data from national statistics offices into one queryable REST feed for cross country comparisons.

Core series are callable without registering for an account; limits are not published.

Retrieves economic time series collected by the Federal Reserve Bank of St. Louis, covering GDP, inflation, employment, and thousands of other indicators.

API key is free to request; the docs do not publish a specific rate limit.

Looks up the issuing bank, card scheme, and country behind the first six to eight digits of a payment card number, with prepaid status included.

Free keyless tier throttled to 5 requests per hour; paid plans remove the limit.

Feeds stock prices, options, fundamentals, and analyst estimates with 15 minute delayed SIP data available alongside historical tick level records.

Two week free trial; Individual plan pricing starts near 150 dollars a month after that.

Reaches PSD2 regulated bank account and transaction data across more than 2,500 European banks, now sold under GoCardless after its 2022 acquisition.

Free tier covers a limited number of connected end users per month.

Places and monitors spread betting and CFD trades and streams related market prices through IG's own trading platform and account infrastructure.

Free demo account required to generate an API key before going live.

Links customer bank accounts across Africa for balance checks, transaction history, and identity verification aimed at lenders and fintech apps.

Free sandbox and demo flow are offered; production pricing is quote based.

Links user bank accounts for balance checks, ACH transfers, and transaction history across the US and Canada, built for budgeting and lending apps.

Sandbox is free and unlimited; a Trial plan allows up to 10 live accounts before full approval.

Computes efficient frontiers, minimum variance weights, and other portfolio risk metrics from a covariance matrix you supply to the endpoint.

Completely free, with no registration, API key, or credit card needed.

Processes online checkouts, in person card and QR payments, subscriptions, and refunds across Latin America through a bearer token secured REST API.

Sandbox test credentials are available before switching to a live access token.

Moves money between accounts for transfers, card acceptance, wallets, and invoicing through one platform built for marketplaces and platforms.

No free tier; pay per transaction pricing carries a 500 dollar monthly minimum.

Publishes US Treasury datasets on public debt, revenue, spending, interest rates, and savings bonds as open government data for public reuse.

Fully open data, no account, token, or published rate limit.

Returns complete NAV history for more than 10,000 Indian mutual fund schemes, updated several times a day straight from the official feed.

Completely free and keyless, with no rate limiting applied.

Lets you query stock quotes, historical prices, and market mover screens with plain SQL statements, returning results as structured JSON.

Free tier is limited in query volume; paid plans start near 15 dollars a month.

Builds Klarna branded checkout, order management, and settlement flows for online stores, authenticating requests with HTTP basic auth.

Checkout and order APIs use free sandbox credentials; the older Payments API stopped taking new integrations in August 2026.

Streams US equity and options quotes plus paper and live order execution over REST and WebSocket, aimed at brokerage style trading apps.

Free developer sandbox gives 15 minute delayed data and paper trading, no funded account required.

Drives inventory, customer, supplier, and sales records in the open source FrontAccounting system through REST calls over company and user headers.

Open source and self hosted, so there is no vendor pricing or credit card involved.

Serves company submission histories and XBRL financial statement facts straight from SEC filings such as 10-K and 10-Q annual and quarterly reports.

Free and keyless; data.sec.gov explicitly does not support CORS for browser requests.

Looks up Indian bank branch details, including RTGS and NEFT eligibility, from an IFSC code through Razorpay's open source toolkit and dataset.

Free and keyless, with CORS enabled so it can be called straight from the browser.

Delivers tick level trades, quotes, and aggregated bars for US stocks, options, forex, and crypto over REST and WebSocket plus flat file downloads.

Polygon.io was renamed Massive in late 2025; existing API keys and the api.polygon.io host still work.

Combines realtime, intraday, and historical pricing with market news and sentiment scoring across 150,000 plus tickers from 70 global exchanges.

Free plan: 100 requests per day, no credit card required.

Ranks the most discussed tickers on Reddit's WallStreetBets subreddit with comment counts and bullish or bearish sentiment scores for each stock.

Anonymous calls are capped at 20 per minute; a free key raises that to 200 per minute.

Opens sandboxed access to Citi account information and payment initiation APIs for partner developers through the Citi Developer Hub catalog.

Sandbox access is free; production requires Citi's partner registration and review.

Maps tickers, CUSIPs, and other identifiers to Bloomberg's open Financial Instrument Global Identifier across equities, futures, and options.

Free API key with no daily, weekly, or monthly call limit stated in the docs.

Builds brokerage style order placement and market feed tools on top of Angel One's trading infrastructure for retail algorithmic trading apps.

Free to use, but requires an existing Angel One trading account plus TOTP login.

Automates invoicing, expense tracking, and accounting records for small businesses through Zoho's OAuth secured REST API and webhook events.

14 day free trial, plus a free plan for businesses under 50,000 dollars annual revenue.

Streams realtime quotes for roughly 10,000 stocks and forex pairs across NASDAQ, NYSE, and Euronext through a public, open source WebSocket feed.

Open source and free, no API key needed; runs over plain WebSocket rather than WSS.

Covers realtime and historical pricing for stocks, forex, crypto, and ETFs spanning 190,000 plus symbols through one unified REST and WebSocket API.

Free plan: 800 requests per day plus a handful of trial WebSocket credits.

Reads and writes a user's YNAB budget categories, transactions, and account balances through an OAuth secured REST API for budgeting tools.

OAuth app registration is free; the docs do not publish a specific rate limit.

Provides commission free paper and live trading plus realtime IEX sourced quotes for US stocks and ETFs, built for algorithmic trading apps.

Paper trading and the free IEX data feed need only an email signup, no funded brokerage account.

Streams realtime stock, forex, and crypto quotes alongside company fundamentals, news, and SEC filing data for market research tools.

Free key allows 60 calls per minute, no credit card required to sign up.

Serves crypto, US stocks, FX, indices, rates, macro series and per fund ETF flows aligned to a single one minute timestamp, with derived indicator series on top.

Free tier checked in October 2026 covers two assets only, with 30 days of history and 10 requests per minute. Paid plans start at 129 dollars monthly.