Best financial data providers for AI agents
Six providers that developers and AI agents use for market data, fundamentals, news and filings. What each returns, how you connect, and how to get access.
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Quick answer
- FinksPassages that answer a plain-English question, each with its source (news, SEC filings and earnings call transcripts)
- Alpha VantageBroad market data across asset classes, with a free key
- Polygon.io (now Massive)US market data over REST, WebSocket and flat files, starting free
- FinnhubA higher free rate limit for personal projects, with company news
- EODHDGlobal end-of-day and intraday prices with fundamentals
- TiingoLong end-of-day price history at a flat rate
Finks wrote this page, and Finks is one of the providers on it. It is listed first for that reason, not as a ranking. Every fact about another provider comes from that provider's own site, checked 20 Oct 2026.
What a financial data provider does
A financial data provider sells market data, company fundamentals, news or filings through an API, a feed or a terminal. Developers call the API from their app or agent, so answers come from data and not from a model's memory.
This page covers providers with a self-serve API key, which suits developers and AI agents. Enterprise terminals and contract-only feeds are not listed.
How to choose a financial data provider
Three questions decide it.
- 01
What does your agent need back?
Structured market data and fundamentals, or text: news and filing passages with a source.
- 02
API or MCP?
An API you call from code, or an MCP server your AI client connects to. Some providers offer both.
- 03
How do you get access?
A free key or plan to start, a monthly plan, or usage-based credits.
The providers
Finks
Best for: Agents that search in plain English and need the passage that answers, with its source.
Finks is a search API built for AI agents. Your agent searches in plain English and gets back the passages that answer it, from news, SEC filings and earnings call transcripts. A source is attached to every result, so your agent can check its work. The same search is available as an MCP server.
- Maker
- Finks
- Connect
- REST API and hosted MCP server
- Access
- Get set up in minutes. Free tier, no card required.
- Coverage
- News, SEC filings and earnings call transcripts. Filings: reportable events in 8-K filings, plus 10-K and 10-Q reports, each linked to the filing on sec.gov. How far back you can search depends on your plan.
- Tools
- finks_search, finks_get_content, finks_list_filing_events, finks_account, finks_account_usage, finks_search_fields
Question
What did Intel say about supply chain risk in its latest filing?
What comes back
{ "type": "filing", "title": "INTEL CORP — 8-K Item 2.02, Results of Operations and Financial Condition", "published_at": "2026-07-23T20:09:00Z", "url": "https://www.sec.gov/Archives/edgar/data/50863/000005086326000155/q226earningsrelease.htm", "passage": { "section_id": "8-k/ex-99.1", "text": "…our complex global supply chain supporting our manufacturing facilities and incorporating external foundries, including from disruptions, delays, trade tensions and conflicts, or shortages, including current industry-wide substrate and memory…" } }Real response, test key, 20 Oct 2026. Trimmed. The finks_search tool calls POST /v1/search.
Alpha Vantage
Best for: Broad market data across asset classes, with a free key.
Maker: Alpha Vantage.
Over 130 endpoints across 9 categories: stock time series, indices, options, news and sentiment, fundamentals, forex and crypto, commodities, economic and technical indicators. The free key allows 25 requests a day; premium plans raise the limit and unlock functions such as news and sentiment. An official MCP server is available.
Polygon.io (now Massive)
Best for: US market data over REST, WebSocket and flat files, starting free.
Maker: Massive.
polygon.io now redirects to massive.com. Data for stocks, options, indices, currencies and futures, delivered over REST, WebSocket and flat files, with a hosted MCP server. The free Stocks Basic plan allows 5 API calls a minute; paid stock plans have unlimited API calls.
Finnhub
Best for: A higher free rate limit for personal projects, with company news.
Maker: Finnhub.
Market data, fundamentals and company news through one API. The free plan allows 60 API calls a minute for personal use and includes company news with one year of history. Global coverage is on the All-In-One plan, billed annually.
EODHD
Best for: Global end-of-day and intraday prices with fundamentals.
Maker: EODHD.
End-of-day and intraday prices for global exchanges, fundamentals and macro data, sold as packages with personal and commercial pricing. A free Sandbox package lets you try the API, and an official MCP server exposes 72 read-only tools.
Tiingo
Best for: Long end-of-day price history at a flat rate.
Maker: Tiingo.
End-of-day prices with 30+ years of history at a flat monthly rate, with a separate price for internal commercial use. The free Starter plan allows 1,000 requests a day and 50 an hour. News is included on paid plans.
Financial data providers compared
| Provider | Data | How you connect | Free access | Source on each result |
|---|---|---|---|---|
| Finks | Answer passages from news, SEC filings and earnings call transcripts | API, MCP | Free tier, no card required | Yes |
| Alpha Vantage | Prices, options, fundamentals, news, FX, crypto, macro | API, MCP | Free key, 25 requests a day | Not stated on its site |
| Polygon.io (now Massive) | Stocks, options, indices, currencies, futures, 8-K events | API, WebSocket, flat files, MCP | Free plan, 5 calls a minute | Source-cited tags on its 8-K API |
| Finnhub | Market data, fundamentals, company news | API | Free plan for personal use, 60 calls a minute | Not stated on its site |
| EODHD | End-of-day and intraday prices, fundamentals, macro | API, MCP | Free Sandbox package | Not stated on its site |
| Tiingo | End-of-day prices; news on paid plans | API | Free Starter, 1,000 requests a day | Not stated on its site |
Where the others are stronger
| Need | Stronger choice | Finks |
|---|---|---|
| Structured prices and fundamentals | Alpha Vantage, Polygon.io (now Massive), Finnhub, EODHD, Tiingo | Finks returns text passages, not statements or price series |
| Long price history | Tiingo (30+ years), Alpha Vantage (25+ years) | Finks does not return price series |
Use a market-data provider when your agent needs prices or fundamentals. Use Finks when it needs to know what was reported and where. Many agents use both.
Add Finks to your MCP client
mcp.json
// Copy your MCP URL from the Finks API console
// Cursor: ~/.cursor/mcp.json
{
"mcpServers": {
"finks-api": {
"url": "<your MCP URL from the console>",
"headers": { "Authorization": "Bearer fk_test_..." }
}
}
}
// Claude Code
claude mcp add --transport http finks-api <your MCP URL from the console> \
--header "Authorization: Bearer $FINKS_API_KEY"Related pages
Questions about financial data providers
What are the top financial data providers for developers?
For developers with a self-serve key: Alpha Vantage, Polygon.io (now Massive), Finnhub, EODHD and Tiingo for market data, and Finks for passages from news and filings with a source. Enterprise terminals such as Bloomberg sell on contract and are not listed here.
What is the best database for financial data?
It depends on what your agent needs. For prices and fundamentals, use a market-data provider. For what a company reported and where, use a source that returns text with a citation.
Can ChatGPT do financial analysis?
ChatGPT can analyze data you give it. For current prices, filings or news, connect it to a data provider's API or MCP server, so it answers from data and not from memory.
Does Finks sell market data?
No. Finks returns the passages that answer a question, each with its source; today that covers news, SEC filings and earnings call transcripts. Pair it with a market-data provider when your agent needs prices.
How do I get a Finks API key?
Sign up for the Finks API console with your email and create a test key; no card needed. For production access, join the waitlist from the console.
Sources
- Alpha Vantage: alphavantage.co/documentation and alphavantage.co/premium, checked 20 Oct 2026.
- Polygon.io (now Massive): massive.com and massive.com/pricing, checked 20 Oct 2026.
- Finnhub: finnhub.io/pricing, checked 20 Oct 2026.
- EODHD: eodhd.com/pricing and eodhd.com/financial-apis/mcp-server-for-financial-data-by-eodhd, checked 20 Oct 2026.
- Tiingo: tiingo.com/about/pricing, checked 20 Oct 2026.
- massive.com 8-K API, checked 20 Oct 2026. Prices are left out because they change; see each provider's site.