Skip to content
Agentmart
Submit a tool

Bellwether

Live Kalshi + Polymarket prediction-market data and cross-venue arbitrage spreads, one schema.

Connector by bellwether.marketsOfficial · Domain verified by the MCP Registry

IndexedLicense unknownRemote (HTTP)
Write a review

Chalk Labs

Need help deploying Bellwether?

Chalk Labs sets up agents like this inside real teams: connected to your tools, tested on your data, with a human in the loop where it matters.

Book a call

Install

Works with Claude Code, VS Code, Cursor, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install connector/bellwether-markets-prediction-markets

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Remote endpoint

  • https://api.bellwether.markets/mcp Remote (HTTP)

Get the weekly diff

The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.

We use your email only for this newsletter. Privacy

About

Live Kalshi + Polymarket prediction-market data and cross-venue arbitrage spreads, one schema.

Reviews

Write a review

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
3 read · 0 write · 0 deleteRead-only
Secrets
1 (API keys, tokens or passwords)
Install scripts
Nothing to install (hosted)
Runs as
Hosted (remote endpoint)

Tools by what they do 3

From the running server's own tool list (tools/list) on Oct 25, 2026.

Read 3 · Look things up without changing anything.

  • get_market
  • list_markets
  • matching_markets

Secrets and settings it asks for

Secrets: values you paste in that let it act as you.

  • X-API-Key

Network hosts it talks to 1

  • api.bellwether.markets · found in remote endpoint, install command

Tools (3)

As the server listed them on Oct 25, 2026. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • get_market

    Get one normalized market. venue is 'kalshi' or 'polymarket'.

  • list_markets

    List open prediction markets across Kalshi and Polymarket (normalized).

  • matching_markets

    Find the same real-world event on both venues, with the YES price spread.

Signals

Last release
Jul 3, 2026 (4 months ago)

Details

Registry name
markets.bellwether/prediction-markets
Version
0.1.0
Auth
API key
License
License unknown
Website
bellwether.markets
First seen
Oct 24, 2026
Last checked
Oct 25, 2026
Source
Official MCP Registry

Done for you

Rather not set it up yourself?

Chalk Labs scopes, builds and runs agents for your team: the task audit, the eval harness, the integrations and the weekly ops report. Fixed scope, priced before we start.

See how we build AI agents →Read the case studies

Chalk Labs is a two-founder AI and growth studio. We build AI agents, CRMs and MVPs for Web3 and AI companies, and have shipped 50+ product and token launches.

launches shipped
50+
launches shipped
media placements
500+
media placements
founders on every account
2
founders on every account

Press we've placed: Forbes · CoinDesk · Decrypt · Cointelegraph · The Block

Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.

Get Bellwether running in your business

Tell us what you want to automate. A founder replies within one working day with a plan, not a pitch deck.

Goes to the Chalk Labs founders, not the newsletter. Privacy

Need help deploying Bellwether?

CallGet help
Cite this page

Bellwether MCP server. Agent Mart. https://agentmart.dev/connectors/bellwether-markets-prediction-markets (last updated 2026-10-25)