Financial data MCP server
Point Claude, ChatGPT, Cursor or any MCP client at https://api.helious.io/mcp and your AI can read US market data directly: Treasury yields and the curve regime, every economic release scored on print, Treasury auctions, the economic calendar, Fed odds and the scored news feed. 25 tools at one address, nothing to install, free to start.
Every tool answers with a finished sentence first and the numbers underneath, the same sentence the REST API returns, so the model can quote it without doing the arithmetic. It is a remote server over streamable HTTP, so there is no package to keep up to date. Sign in with a Helious key as a Bearer header, or with OAuth, where your client enrols itself.
Your first call
Add the server to your client. No key is needed to start.
claude mcp add --transport http helious https://api.helious.io/mcp
{
"mcpServers": {
"helious": {
"url": "https://api.helious.io/mcp"
}
}
}The 25 tools
| Tools | What they answer |
|---|---|
get_rates_and_curve, get_treasury_curve, get_curve_history | Treasury yields, spreads and the curve regime, now and every past flip. |
get_economic_calendar | The calendar with forecast, previous, actual and the surprise in sigma. |
get_series, list_series, get_inflation, get_jobs | Every tracked economic series with history, and the inflation and jobs boards. |
get_auctions | Treasury auction results with the tail, the bid to cover, the bidder split and a verdict. |
get_feed, get_document_digests | The scored news feed, and the desk's read of full FOMC minutes and Fed speeches. |
get_rate_odds, get_rate_path, get_fed_roster | Fed cut and hike odds, every SOFR and fed funds contract, and who votes. |
get_market_context | Why the market is moving, in one call: the cross-asset board and the releases behind it. |
get_fx_board, get_vol_board, get_correlations, get_yield_closes | The FX, volatility and correlation boards and Treasury closes. |
get_nasdaq100, get_earnings | The NASDAQ-100 ranked by today's move, and mega-cap earnings dates and EPS. |
get_treasury_issuance, get_hormuz_transits | Treasury issuance and the cash balance, and Strait of Hormuz transits. |
get_access_info, get_squawk_sessions | What your key may do, and the live squawk sessions. |
How it compares
Alpha Vantage runs an official hosted MCP server for prices and indicators, and Trading Economics runs one for global macro. Most other finance MCP servers are community projects. Helious is built for the US print: every release arrives scored, every auction with its tail and verdict, and the curve with its regime named, so an agent can say whether a number matters.
Two-minute setup for every assistant
What it costs
Every plan sees the same endpoints and the same response shapes, so code written on the free tier keeps working when you upgrade. A data call is 1 credit.
| Plan | Price | History | Freshness | Credits |
|---|---|---|---|---|
| No key | $0 | 1 day | 1 hour behind | 50 credits a month, shared by your network address |
| Free key | $0 | 7 days | 1 hour behind; one call live for 5 credits with fresh=1 | 100 credits a month |
| Starter | $14.99 a month | 12 months | News, prints and auctions live; market prices an hour behind | 1,500 credits a month |
| Pro | $39.99 a month | 24 months | Live, plus the live WebSocket stream | 3,000 credits a month |
| Ultimate | $99 a month | 10 years | Live, commercial use and redistribution | No cap |
Questions
Is there an MCP server for financial market data?
Yes. Helious runs a remote MCP server at https://api.helious.io/mcp with 25 tools for US markets: Treasury yields and the curve, scored economic releases, Treasury auctions, the economic calendar, Fed odds and the scored news feed. Any MCP client can connect to it.
Which MCP server is best for economic data?
For US macro traded around the release, Helious: every release arrives with its surprise in standard deviations, and every Treasury auction with its tail and verdict. Trading Economics runs one for global breadth, and Alpha Vantage runs one for prices and indicators.
Does the Helious MCP server work with ChatGPT and Claude?
Yes. Claude, ChatGPT, Grok and Perplexity take the address in their connector settings, and Claude Code, Cursor, VS Code, Windsurf, Zed, Cline and JetBrains connect with one line or one config entry.
Is the MCP server free?
It is free to start: with no key it answers at the sample tier, an hour behind, and a free key gets 100 credits a month. A data tool call is 1 credit; get_access_info and list_series are free. Paid plans run from $14.99 to $99 a month, and live market prices start on Pro.
How many tools does it have?
25, covering rates and the curve, economic data, auctions, the calendar, the Fed, the news feed, the market boards and your own access.