Massive.com MCP Server: Setup for Claude, Cursor and Other Apps
Lets your assistant fetch market data from Massive.com (stocks, options, forex, crypto, futures) and analyze it.
Massive.com's own server gives your assistant access to its full financial data API through three tools. It can find the right endpoint, fetch the data and run SQL or calculations on the results. Massive hosts it for you with a sign-in, or you can run the open source version with your API key. What you can query depends on your Massive plan, and the README marks the project as experimental.
Good for
- Traders and analysts who want market data in a chat
- Developers building finance agents without wiring up each endpoint
- Researchers who want returns, moving averages or option greeks computed on fetched data
Works in
14 should work
Tap an app to see how to set it up and any known problems.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports hosted MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports local MCP servers.
Supports hosted MCP servers.
Install mcp_massive MCP
Claude Code
- 1
Copy this prompt.
Add the mcp_massive MCP server to Claude Code. Run this command: claude mcp add --transport http mcp-massive https://mcp.massive.com/ Then check that it loaded and tell me if I need to sign in or restart.
- 2
Paste it into Claude Code. It shows the change and asks before running it.
Requires Sign-in with the vendor account (OAuth).
Hosted (recommended by Massive): connect to https://mcp.massive.com/ and sign in. Self-hosted: first run uv tool install "mcp_massive @ git+https://github.com/massive-com/mcp_massive@v0.10.0", then use the Self-hosted entry with your API key. Desktop apps may not see the uv tool folder on PATH; use the full path from which mcp_massive there.
Built from the package data we hold. Not yet tested by us.
Tools
Finds the right Massive data endpoint or built-in function for your question
Searches the Massive API by plain-language query and returns matching endpoints with a short description. You can ask for more or full parameter docs. It also lists the built-in calculation functions.
Try: “Which endpoint gives daily prices for options contracts?”
Network ·
search_endpointsFetches data from any Massive.com endpoint and can keep it for later analysis
Calls the endpoint you choose and returns the data. You can save the result as a table in memory and apply functions such as moving averages, returns or option greeks. Large results come with a hint for the next page.
Try: “Get AAPL daily closing prices for the last 3 months and compute the 20-day moving average.”
Network ·
call_apiRuns SQL on data you fetched earlier in the session
Lets the assistant run SQL on the tables it saved from earlier calls. It can list and describe tables, join them and clear a table with DROP TABLE. Those tables live in memory, not in your Massive account.
Try: “Compare the average daily volume of MSFT and AAPL from the tables you saved.”
Write ·
query_data
Read from the source code
Permissions
low risk · 3 things to watch
Low risk
The server only reads market data from Massive.com and keeps working tables in memory. Your assistant sends its data requests to Massive's service, so check your plan's terms for how that data may be used.
What it can do
- Read your data
- Create and change things
- Delete things
- Read-only mode
Watch out for
Access matches your Massive plan
Requests for data your plan does not include return an access-denied error. The assistant reads market data only and does not trade. massive.com
Marked experimental
The README warns of breaking changes. Pin a version if you self-host. github.com
Data goes through Massive's service
Requests are proxied to Massive.com's API and fall under its privacy policy. The self-hosted server keeps fetched tables in memory only. github.com
Security advisories
No published security advisories as of Nov 1, 2026.
Technical details
| Talks to | Massive.com API (api.massive.com by default). mcp.massive.com when you use the hosted server |
|---|---|
| Sign-in and keys | The hosted server signs you in with OAuth. The self-hosted server reads your Massive API key from the MASSIVE_API_KEY setting. |
Questions
What is the Massive MCP server URL?
The hosted server is at https://mcp.massive.com/. Add it as a connector and sign in once with your Massive account.
Is the Massive MCP server official?
Yes. It comes from Massive.com, the company behind the data API, and the open source code is in its own GitHub organization.
Do I need an API key?
Not for the hosted server, which uses a sign-in. The self-hosted server needs a Massive API key, and the README links to where you get one.
Hosted or self-hosted: which should I use?
Massive says most users should use the hosted server, since there is nothing to install. It limits working storage to 64 MB per session. Self-host if you routinely download very large datasets.
Why can't I see options or other data?
Access mirrors your Massive plan. Asking for an asset class your plan does not cover, such as options without an options plan, returns an access-denied error.
Can it place trades?
No. The tools fetch market data and analyze it. None of them places orders.
Information
updated Nov 2, 2026
- Publisher
- Official
- Transport
- Streamable HTTP, stdio
- Auth
- OAuth
- License
- MIT
- Last commit
- Oct 8, 2026
- Open issues
- 8
Sources
Docs, issue trackers and discussions this page is built from. Issues, quotes and findings above link to their own source.
Show all 2Hide
- github.com · github.com
- massive.com · massive.com