shadow vs app.oddsrail/polymarket-kalshi-arbitrage
shadow is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑16.
shadow is a plugin bundle for AI coding tools published by shadow. No marketplace we read lists it any more. app.oddsrail/polymarket-kalshi-arbitrage is an MCP server published by oddsrail.app. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-27. A plugin in this pair is no longer listed on any marketplace we read, so search engines are asked not to index the page.
Where each is published
| Marketplace |  app.oddsrail/polymarket-kalshi-arbitrage | |
|---|---|---|
| Community marketplace aaronwald/shadowagent | Removed on 2026-10-16 Version: 1.1.0 Forks (GitHub): 0 Stars (GitHub): 1 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed, marked deprecated Version: 0.10.0 Downloads/month (PyPI): 2 223 Downloads/week (PyPI): 153 Forks (GitHub): 0 Stars (GitHub): 1 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | shadowno longer listed · | app.oddsrail/polymarket-kalshi-arbitrage |
|---|---|---|
| Marketplaces that list it (differs) | 0 | 1 |
| Stars (GitHub) | 1 | 1 |
| Forks (GitHub) | 0 | 0 |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Remote server or your machine |
| Transport (differs) | Not stated | stdio, Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 4, secrets among them: 1 |
| Parts of the bundle (differs) | 5 | Not a bundle |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | github.com/aaronwald/shadowagent | github.com/hmesutozsoy/oddsrail |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-14 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 2 days ago, requires a key |
Lines where the two differ have a tinted background and bold values. No value is marked better or worse: a plugin no marketplace lists any more is shown with its last known data, which we do not rank against current figures.
What to use instead of shadow
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Polymarket & Kalshi whale trades, ranked traders, backtesting and Autopilot. $15/mo.
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Paper-trade across Kalshi, Polymarket, Alpaca, and Coinbase from a Claude Code session. Onboarding is just API keys; v1 is paper-only.
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prediction-market-mcp io.github.reviewmyemails/prediction-market-mcp
Real-time Polymarket and Kalshi data, cross-platform arb detection, strategy signals
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Veynor — Prediction Market Intelligence
Prediction market intelligence for AI agents. Live data from Kalshi and Polymarket.
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prediction-market-signal-mcp io.github.ciinkwia/prediction-market-signal-mcp
Polymarket + Kalshi odds, movers, gaps, watch, and X sentiment for AI agents. Pay per call via x402.
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Prediction Market Friction Tracker
Prediction-market fee/KYC/withdrawal data, venue recommendations, and a paid x402 change feed.
What each says it does
shadow
Exchange-pure domain agents (Kalshi, Kraken, Polymarket, Symbology)
app.oddsrail/polymarket-kalshi-arbitrage
Cross-venue prediction markets for AI agents: Polymarket + Kalshi, costed and attributed
How to run each
shadow
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
app.oddsrail/polymarket-kalshi-arbitrage As a local MCP server: PyPI package
claude mcp add --env "POLYMARKET_PRIVATE_KEY=<YOUR_POLYMARKET_PRIVATE_KEY>" --transport stdio polymarket-kalshi-arbitrage -- uvx oddsrailRequires: POLYMARKET_PRIVATE_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only app.oddsrail/polymarket-kalshi-arbitrage has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of shadow publish no settings it asks for, so we do not compare settings.
What it can do: shadow · What it can do: app.oddsrail/polymarket-kalshi-arbitrage · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.