Docs

Build on Vantafin.

One API for US equities and ETFs - company profiles, live quotes, fundamentals, SEC filings, news, earnings transcripts, and real-time WebSocket streams.

Base URL: api.vantafin.com/v1 SDKs: Python · JavaScript · Go · Java · Ruby

One key, one endpoint, 23 typed tools.

The Vantafin MCP server exposes typed financial data tools over the Model Context Protocol - quotes, fundamentals, SEC filing search, transcripts, screeners, and more. Works with Claude, Claude Code, Cursor, and any MCP-compatible client. Minute-scale setup: drop in a Cursor config or point Claude Code at the Streamable HTTP endpoint and start querying.

Browse MCP guides

// MCP tool call

get_quote("NVDA")

{
  "symbol": "NVDA",
  "price": 187.62,
  "change": "+2.14%",
  "source": "Vantafin"
}

// REST request

GET /v1/quotes/NVDA

{
  "symbol": "NVDA",
  "price": 187.62,
  "change": "+2.14%",
  "volume": 42815200
}

REST API

OpenAPI-documented, built for dashboards, bots, and pipelines.

One API key covers company profiles, live quotes, fundamentals, SEC filings, news, earnings transcripts, screener results, and macro data. Generate a typed client in your language of choice straight from the OpenAPI spec.

Company Data Market Data Screener Corporate Actions Ownership Short Interest Insider Transactions Fundamentals Macro SEC Filings News Earnings Transcripts

Browse REST guides

WebSocket API

Sub-second market events, without polling REST.

Subscribe to live quotes, news, SEC filings, and trading halts over one authenticated socket. Built for real-time dashboards, monitors, and event-driven workflows. Included on Ultimate.

Overview

Connection, auth, and subscription model

Live Quotes (Per Second)

Channel: LS - tick-level quote updates

Live Quotes (Per Minute)

Channel: LM - minute-bar OHLCV

Live News

Breaking headlines, tagged by ticker

Live SEC Filings

New filings the moment they post

Trading Halts

Channel: H - halt and resume events

Frequently asked questions

Where should I start in the docs?

If you are wiring an app or script, start with REST. If you want Claude or Cursor to query data, use the MCP setup. For live ticks, news, or filings, jump to WebSocket.

How do I get an API key?

Subscribe to Pro or Ultimate on the pricing page, then create a key in your account. The same key authenticates REST, MCP, and (on Ultimate) WebSocket.

Is there an OpenAPI spec I can generate a client from?

Yes. The full REST surface lives in a single OpenAPI spec - point codegen at it for a typed client in Python, JavaScript, Go, Java, or Ruby. See the OpenAPI section above.

Where are REST, MCP, and WebSocket each documented?

This page is the reference: endpoints and auth for REST, tool list and client config for MCP, and channels plus message shapes for WebSocket. Product overviews live on REST, MCP, and WebSocket.

Do I need a paid plan to follow the guides?

You can read every guide without an account. Calling the APIs requires Pro (REST and MCP) or Ultimate (those plus WebSocket). The web app itself stays free to browse with delayed data.

Build on Vantafin.

MCP Server

REST API

WebSocket API

OpenAPI Spec

One key, one endpoint, 23 typed tools.

OpenAPI-documented, built for dashboards, bots, and pipelines.

Sub-second market events, without polling REST.

Generate a typed client in minutes.

Frequently asked questions

Ready to invest without the price tag?