Bellwether MCP server

by bellwethermetrics.com·com.bellwethermetrics/bellwether-mcp·v0.1.0

Live prediction market data from Polymarket and Kalshi with VWAP pricing and reportability.

B78/100grade B

What users say

No reviews yet

Safety scan

B78/100

Adoption

Growing

0 stars33 downloads/wk

Reviews

Nobody has reviewed Bellwether yet.

If you have run it, two minutes of your experience saves the next person an afternoon.

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

get_market
Get live price, volume-weighted average price (VWAP), and data quality tier for a specific market. Accepts a Bellwether ticker or slug. Always check reportability before citing a price in published content.
get_platform_spread
Compare prices between Kalshi and Polymarket for a matched market. Returns the spread in cents and which platform is pricing higher. Only works for cross-platform matched markets (is_matched: true).
get_reportability
Check whether a prediction market is safe to cite in published content. Returns a reportability tier (Reportable, Caution, or Fragile) and plain-English editorial guidance. Always call this before citing a market price in an article or report.
get_top_markets
Get the most actively traded prediction markets right now, optionally filtered by political category. Useful for discovering what political questions markets are currently focused on.
search_markets
Search active political prediction markets by topic or keyword. Returns matching markets with tickers, titles, and volume. Use this tool first when you need to find a market on a topic — then pass the ticker to get_market for live price data.

scanner v0.1.10 · 2026-09-28 · same rubric, same numbers if you re-run it

no findings

Code scan18 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitystatic API keys via environment variables6/15
Maintenancelast push 0 days ago15/15
Maintainer identitynamespace and repository owner differ; GitHub account older than a year5/10

Overall 78/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 78/100; higher than 57% of 48,255 servers
Tools: 5; the typical server has 7
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
Downloads a week: 33; more than 22% of 12,191 servers with a package

What its tools let an agent do: 5 read

Runs npx -y bellwether-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add bellwether-mcp -- npx -y bellwether-mcp

Is Bellwether MCP server safe?: Mostly: it is graded B (78/100). Read the Bellwether safety report
How do I install Bellwether?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Bellwether need an API key?: Yes. The registry entry asks for BELLWETHER_API_KEY.
Is Bellwether maintained?: The last commit was 37 days ago (2026-09-28). The latest release is v0.1.0.
What can I use instead of Bellwether?: Servers from other publishers that do the same job: CCXT MCP server.
How does Bellwether compare with other MCP servers?: safety score 78/100 (higher than 57% of 48,255 servers); tools 5 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Same job from other publishers: the closest match first, then the best rated.

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