Locus product guide · Updated November 10, 2026

Best finance MCP servers: Alpha Vantage, EDGAR, Yahoo

Alpha Vantage runs the best official finance MCP server: https://mcp.alphavantage.co/mcp, with a free key for 25 requests a day and premium plans for more. SEC EDGAR data is free from the SEC, and community servers such as sec-edgar-mcp wrap it. Yahoo Finance has no official API or MCP server; community servers use yfinance, which Yahoo does not endorse. Through Locus Pro, every Alpha Vantage call is 5.1 credits ($0.0051), and EDGAR comes as hosted tools. Prices checked November 10, 2026.

Which finance MCP servers are worth using?

Of the data vendors here, only Alpha Vantage and Massive run official hosted servers. The EDGAR and Yahoo Finance servers are community projects. Checked November 10, 2026.

Which finance MCP servers are worth using?
Server	Data	How it connects	How you pay	Who runs it
Alpha Vantage	Quotes, price history, fundamentals, earnings, news sentiment	Remote https://mcp.alphavantage.co/mcp, or local uvx marketdata-mcp-server with your key	Free key for 25 requests a day; monthly premium plans by rate limit	Alpha Vantage (official)
SEC EDGAR MCP	SEC filings and company financial data	Docker, with SEC_EDGAR_USER_AGENT set to your name and email	Free; the SEC allows 10 requests a second	stefanoamorelli, not affiliated with the SEC (387 GitHub stars)
Yahoo Finance MCP	Quotes, history, statements and options via yfinance	uvx --from git+https://github.com/Alex2Yang97/yahoo-finance-mcp yahoo-finance-mcp	Free to run	Alex2Yang97, community (368 GitHub stars)
Massive (formerly Polygon)	Market data from the Massive API	Hosted https://mcp.massive.com	Needs a Massive API key	Massive (official, marked experimental)
Locus Market Data	Alpha Vantage and SEC EDGAR as typed tools	Remote https://finance.mcp.paywithlocus.com with OAuth	Per call from prepaid credits	Locus

Is the Alpha Vantage MCP server free?

Yes, up to 25 requests a day on a free API key. Premium plans lift the daily cap and start at 75 requests a minute. The remote server signs you in with OAuth, and you enter your API key in that step.

It is also in the ChatGPT and Codex plugin directory and in the Claude directory. In Codex, add it with codex mcp add alphavantage --url https://mcp.alphavantage.co/mcp. In Claude Code, the same URL works with claude mcp add --transport http alphavantage.

Is there an official Yahoo Finance MCP server?

No. Yahoo offers no public API, and Yahoo Finance MCP servers are community projects built on yfinance. The yfinance README says it is not affiliated with or endorsed by Yahoo, and that the Yahoo Finance API is meant for personal use only.

The Locus catalog has Yahoo Finance endpoints too: yahoo-finance/get-stock-stats at 75.8 credits and yahoo-finance/search-ticker at 25.3 credits. Both are built over the Yahoo website, so they can break when the site changes, and its terms may restrict automated access. For quotes and fundamentals, Alpha Vantage is the cleaner source at 5.1 credits a call.

Yahoo Finance API options

What is the best SEC EDGAR MCP server?

stefanoamorelli/sec-edgar-mcp is the most-starred EDGAR server we checked. It runs in Docker and needs SEC_EDGAR_USER_AGENT, because the SEC asks every client to declare who it is. It is not affiliated with the SEC.

EDGAR data itself is free from the SEC, with a limit of 10 requests a second. Locus Pro also serves edgar/company-facts, edgar/company-submissions and edgar-search/search as hosted tools, so you run no Docker container.

SEC EDGAR API guide

What does market data cost through Locus Pro?

Every Alpha Vantage endpoint in the Locus catalog costs a fixed 5.1 credits, about $0.0051 per call, with no Alpha Vantage key and no 25-a-day cap. Locus plans limit calls per minute instead: 5 on Free and 15 on Plus. 1,000 credits equal $1. Live catalog prices on November 10, 2026:

What does market data cost through Locus Pro?
Data	Locus endpoint	Credits per call	Price per call
Latest quote	alphavantage/global-quote	5.1 fixed	$0.0051
Daily price history, 20+ years	alphavantage/time-series-daily	5.1 fixed	$0.0051
Company overview and ratios	alphavantage/company-overview	5.1 fixed	$0.0051
Earnings call transcript	alphavantage/earnings-call-transcript	5.1 fixed	$0.0051
News with sentiment scores	alphavantage/news-sentiment	5.1 fixed	$0.0051
Yahoo key stats, built over the website	yahoo-finance/get-stock-stats	75.8 fixed	$0.0758
Yahoo ticker search, built over the website	yahoo-finance/search-ticker	25.3 fixed	$0.0253

What does a daily ticker check cost through Locus Pro?

Say an agent pulls a quote, an overview and earnings for 20 tickers each weekday. That is 60 calls a day, more than the free key's 25.

Over 22 weekdays it is 1,320 calls, or 6,732 credits, about $6.73 a month through Locus Pro, with no daily cap and no plan to pick.

How do you choose a finance MCP server?

Pick by data source, volume and how much the terms matter to you.

Light use of quotes and fundamentals: Alpha Vantage with a free key.
Heavy, steady use: Alpha Vantage premium or Massive. At that volume, calls can cost less with your own Alpha Vantage account and API key.
Filings: the free SEC EDGAR MCP server if you can run Docker; Locus Pro if you want a hosted tool.
Personal research only: a yfinance-based Yahoo Finance server, within Yahoo terms.
Mixed or bursty market data next to other APIs: Locus Pro.

All-host list of MCP servers

Frequently asked questions

Do I need an API key for SEC EDGAR data?

No. The SEC does not issue keys. It asks each client to send a User-Agent that names who is calling, and it limits traffic to 10 requests a second.

Can I run the Alpha Vantage MCP server locally?

Yes. Alpha Vantage publishes a local server you start with uvx marketdata-mcp-server and your API key. The hosted server at mcp.alphavantage.co is easier for most hosts.

Is it allowed to use yfinance in a commercial agent?

The yfinance README says the Yahoo Finance API is meant for personal use and points you to Yahoo terms for your rights to the data. Read those terms before you build a product on it.

Which finance MCP servers work in ChatGPT?

Alpha Vantage is in the ChatGPT plugin directory and works with any free or paid ChatGPT account, per its README. Other remote servers can be added as a custom MCP server on ChatGPT for the web.

Implementation references

Use these first-party references for current request contracts and account requirements. Tool availability, prices, and negotiated terms can change.

Sources

Third-party details were checked on November 10, 2026. Vendors change pricing and features often, so confirm on their site before you decide.