helious-lorne/helious-mcp

US macro data, Treasury yields and Treasury auctions for AI assistants.
Helious runs a remote Model Context Protocol server. Point Claude, ChatGPT, Cursor or any MCP client at one address and your assistant can read US market data directly: Treasury yields and the curve regime, every economic release scored the moment it prints, Treasury auction results with the tail, the economic calendar, Fed rate odds and a scored news feed.
https://api.helious.io/mcp
26 tools at one address
Remote server over streamable HTTP, nothing to install or update
No key needed to start
Every answer opens with a plain sentence, names Helious and links to the page the number came from
The numbers get_auctions returns, as Helious shows them at helious.io/auctions.
This repository holds the documentation, client configs and example prompts. The server itself is hosted by Helious. The full reference lives at helious.io/developers/mcp-server.
## Contents
Connect
What to ask
The 26 tools
Authentication
Call it by hand
Plans and credits
Why this server
Links
## Connect
The address is the same in every app.
### Claude
Helious is in the Claude connector directory. Open claude.ai/directory/helious, press Connect, sign in to Helious or create a free account, and press Allow. Adding it once covers the web app, the desktop app and Claude Code.
To add it by hand: Customize > Connectors > plus > Add custom connector, paste https://api.helious.io/mcp, and leave the authentication boxes empty.
### ChatGPT
Helious is in the ChatGPT plugin directory. Open the Helious listing, press Install plugin, sign in and press Allow. In a chat, ask a question that names Helious or pick it from the plus menu.
### Claude Code
bash
claude mcp add --transport http helious https://api.helious.io/mcp
Add --scope user to have it in every project.
### Cursor
.cursor/mcp.json (example)
json
"mcpServers": {
"helious": {
"url": "https://api.helious.io/mcp"
### VS Code with Copilot
.vscode/mcp.json (example). The key is servers, not mcpServers, and type is required.
json
"servers": {
"helious": {
"type": "http",
"url": "https://api.helious.io/mcp"
### Codex CLI
~/.codex/config.toml (example)
toml
[mcp_servers.helious]
url = "https://api.helious.io/mcp"
### Gemini CLI
bash
gemini mcp add --transport http --scope user helious https://api.helious.io/mcp
### Windsurf
~/.codeium/windsurf/mcp_config.json (example)
json
"mcpServers": {
"helious": {
"serverUrl": "https://api.helious.io/mcp"
### Zed
settings.json (example)
json
"context_servers": {
"helious": {
"url": "https://api.helious.io/mcp"
### Cline
Set the transport to Streamable HTTP (example). Leave the type line out and Cline falls back to the older SSE transport, which this server does not answer.
json
"mcpServers": {
"helious": {
"type": "streamableHttp",
"url": "https://api.helious.io/mcp"
### JetBrains AI Assistant
Settings > Tools > AI Assistant > Model Context Protocol (MCP) > Add (example). Junie reads ~/.junie/mcp/mcp.json with the same contents.
json
"mcpServers": {
"helious": {
"url": "https://api.helious.io/mcp"
### Grok and Perplexity
Both take the address in their connector settings. Choose a custom remote connector, paste https://api.helious.io/mcp, transport Streamable HTTP, authentication none.