Bullrun

Bullrun MCP

A hosted remote MCP server that turns Claude (and other MCP clients) into a research analyst over global stocks, ETFs and your own portfolios.

Endpoint	https://mcp.bull-run.org/mcp — Streamable HTTP, OAuth 2.1 + PKCE
Web app	https://bull-run.org
Official MCP Registry	org.bull-run/bullrun
Glama connector	https://glama.ai/mcp/connectors/org.bull-run/bullrun
Privacy policy	https://bull-run.org/privacy

Bullrun is primarily a hosted service — there is nothing to install and no API key to manage for normal use. You point your MCP client at the remote endpoint and sign in with Google. This repository holds the connector's public metadata (server.json), connection docs, and a local stdio build of the MCP layer for directory/security checks. The Bullrun application and data services remain maintained separately.

Connect

Claude (web, Desktop, mobile) — requires a paid Claude plan:

1. Settings → Connectors → Add custom connector
2. Name it Bullrun, paste https://mcp.bull-run.org/mcp, and add it.
3. Click Connect and complete the Google sign-in / authorize step.

Claude Code:

claude mcp add --transport http bullrun https://mcp.bull-run.org/mcp

Full setup for Cursor, VS Code, and the MCP Inspector is in docs/mcp-connect.md.

What you can do once connected

Public market-data tools work for any connected client. The portfolio tools resolve your own Bullrun account after Google sign-in; the two draft tools require a Bullrun Pro account.

Stocks

Tool	What it does
screen_stocks	Screen the global universe by sector / industry / country / market cap; sort by P/E, dividend yield, revenue or revenue growth.
get_stock_metrics	Consolidated snapshot for one ticker — identity (ISIN/LEI/CIK), latest price, valuation, most recent financials, description.
get_financial_history	1–15 fiscal years of annual/quarterly statements, per-share metrics, margins, CAGRs and consistency checks.
get_quality_moat_metrics	ROIC, ROIC-vs-WACC spread, ROE/ROA, accruals, cash conversion, capex intensity, dividend payout/growth, buyback proxy.
get_forward_estimates	Consensus revenue / EPS / EBITDA, guidance, estimate revisions, and derived forward P/E & PEG context.
get_operating_kpis	Domain KPIs — ARR, net revenue retention, RPO, billings, customer counts, payment & cross-border volume.
get_revenue_breakdown	Segment, geography, product or customer revenue splits.
get_earnings_call_transcript	Speaker-tagged earnings-call transcript chunks, fiscal-period filters and text search.

ETFs and funds

Built for the way European investors actually shop for funds: by ISIN, by tracked index, and by total cost — with venue duplicates collapsed so one fund listed on six exchanges reads as one choice rather than six.

Tool	What it does
screen_etfs	Screen the whole fund universe by expense ratio, AUM, yield, trailing returns, volatility, liquidity, top-10 concentration and fund age, combined with issuer, index, domicile, UCITS status, distribution policy and currency hedging — plus look-through (holdingSearch) to find funds by what they hold.
get_etf_index_group	"Cheapest way to track the S&P 500 / MSCI World?" — every fund on one index, cheapest first, one row per fund with its venues, and an explicit count of funds that publish no fee.
get_etf_fund	Resolve an ISIN (or any venue ticker) to the fund and every exchange it trades on.
get_etf_filter_options	The exact values the categorical filters accept, so a screen never silently returns nothing on a guessed string.
search_etfs	Look up a known fund by name, ticker or ISIN, with classification, index, cost and yield filters.
get_etf_snapshot	Modular snapshot for one listing — identity, classification, market, NAV/AUM, costs, income, benchmark.
get_etf_holdings	Paginated constituents with an explicit partial-coverage contract.
get_etf_exposures	Holdings look-through to sector / country / issuer exposure.
get_etf_timeseries	Price history, with unavailable NAV / total-return / premium-discount series named rather than synthesized.
get_etf_risk	Volatility, drawdown, Sharpe/Sortino/Calmar, VaR, and benchmark-relative beta and tracking error.
compare_etfs	Side-by-side cost, performance, risk and holdings comparison.
analyze_etf_overlap	Shared holdings and a weighted lower-bound overlap between funds.
simulate_etf_cost	Deterministic multi-year cost scenario from expense ratio, spread, commission and contributions.
analyze_portfolio_fit	How a candidate fund would fit your existing portfolio. (sign-in)
query_etfs	Original ETF search. Retained for compatibility; prefer screen_etfs or search_etfs.

Your portfolios

Tool	What it does
get_capabilities	Which account is connected, whether Pro is active, granted scopes, and which tools are gated.
list_portfolios	Your virtual portfolios with value, day change, cost basis and total return. (sign-in)
get_portfolio_context	Deep snapshot of one portfolio: every holding with weight, sector and return, plus Bullrun's insights. (sign-in)
get_portfolio_analytics	Correlation/covariance, contribution-to-risk, factor exposure, sector/currency/country concentration, stress scenarios, and candidate-fit analysis. (sign-in)
create_portfolio_from_positions	Save a portfolio you have already decided, from an explicit {ticker, weight} basket used verbatim. (sign-in, no Pro needed)
create_portfolio_draft	Draft a new paper portfolio from a plain-English brief. Draft-only — saved for review, never changes a live position. (Pro)
create_position_draft	Suggest additions to an existing portfolio. Draft-only — saved for review. (Pro)

Authentication & privacy

The server is an OAuth 2.0 protected resource (RFC 9728). On first connect your client runs an automatic discovery handshake and sends you through Google sign-in; after you authorize, per-user tools resolve your Bullrun account. The MCP layer is a thin proxy with no database of its own — read tools return market data and your own holdings, the per-user read tools accept a privacyMode (full by default, or weights_only to return only relative figures), and the draft tools never mutate live holdings. See the privacy policy.

Local stdio build

The hosted endpoint above is the recommended integration. For directories that require building and running a local MCP server, this repo can run the MCP layer over stdio:

npm ci
npm run build
BULLRUN_API_BASE=https://bull-run.org node dist/stdio.js

Public market-data tools work without credentials. Portfolio and draft tools still require a Bullrun OAuth token in hosted clients and return an authentication-required error in anonymous stdio checks.

License

MIT.