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0xinsider

Read-only MCP access to Polymarket sports and esports traders, markets, flows, large trades, and research.

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Install 0xinsider

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "0xinsider": {
      "command": "npx",
      "args": [
        "-y",
        "@0xinsider/mcp@latest"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

We couldn’t confirm it starts correctly

The install command installed and started the server, which then stopped for configuration (such as an API key) that our sandbox does not have — expected for servers that connect to your account.

npx -y @0xinsider/mcp@latest

No response to initialize.

This is an experimental automated check and can have false negatives — missing environment variables, a slow cold install, etc. It doesn’t necessarily mean something’s wrong. Last checked 13d ago.

Overview

0xinsider MCP server exposes read-only Polymarket analytics for sports and esports markets through remote Streamable HTTP or a local CLI package. Its tools cover trader grades and P&L, large and suspicious trades, market flow, positions, games, research, reports, and webhooks. Use it when an agent needs structured market intelligence without placing trades or modifying data. Authentication supports OAuth 2.1 or API keys, while sandbox operations can be tested without an account.

Use cases

  • Analyze settled sports and esports wallet performance
  • Review large trades and suspicious-trade signals
  • Track sharp-money flow across Polymarket markets
  • Search published research and report snapshots
  • Explore games, coverage, and market-level analytics

Key features

  • Read-only Polymarket analytics
  • Trader grades and realized P&L
  • Large-trade and suspicious-trade data
  • Market flow and sharp-money signals
  • Research, reports, games, and coverage
  • Remote Streamable HTTP and local stdio access

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked 1d ago

Recent health check succeeded.

9/9 checks healthy over the last 45d

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 15d ago via OSV.dev · @0xinsider/mcp@latest (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars1Stargazers on the source repository.
npm downloads20kPackage downloads in the last 30 days.
Last commit8d agoMost recent push to the default branch.
Install checkRunsOur sandbox started it; it then asked for an API key or config.

How 0xinsider works

What 0xinsider MCP server does

0xinsider MCP server gives AI agents read-only access to Polymarket analytics and infrastructure focused on sports and esports markets. It exposes data about traders, markets, games, positions, large trades, market flow, published research, reports, and webhooks. The server is intended for analysis and retrieval rather than trading or other mutations.

The bundled skills help agents interpret the available data. They cover large-trade review, wallet grades, sharp-money flow, market research, and API access. Wallet analytics include settled sports and esports performance, category records, leaderboards, position timelines, and exports. Flow features include graded holders, candles, suspicious-trade flags, and Edge Hunter views with configurable selections.

How it works

The hosted MCP endpoint is https://api.0xinsider.com/api/v1/mcp and uses Streamable HTTP. A local stdio option is available through the @0xinsider/mcp CLI package. MCP discovery calls such as initialize, ping, and tools/list do not require credentials; tool calls require either an API key or an OAuth 2.1 token.

OAuth clients can authenticate through the protected-resource metadata returned by the service. Clients that support environment-variable expansion in headers can send an API key as a bearer token. The API also provides a sandbox: documented operations can be tried without credentials, and the agent registration endpoint can return a sandbox key along with steps for live access.

The tool catalog includes canonical endpoints for large trades, suspicious trades, individual market flow, batched market flow, sharp-money flows, and coverage. Deprecated aliases remain discoverable but should not be used for new integrations. Rate limits depend on the subscription plan, including 100 requests per minute on Pro and 200 on Max.

Setup and configuration

Install the complete Agent Plugin with:

Terminal
npx skills add 0xinsider/agent-plugin

A single skill can be installed with the --skill option, and existing skills can be refreshed with npx skills@latest update. For a local MCP process, initialize the CLI package:

Terminal
npx -y @0xinsider/mcp@latest init

A remote client can point to the hosted endpoint without embedding credentials in the server definition when it supports the plugin's OAuth sign-in flow. For clients that expand variables in headers, configure Authorization: Bearer ${OXINSIDER_API_KEY}. The API key itself is supplied by the user or agent setup rather than by the default remote configuration.

Tools and capabilities

  • Read trader grades, realized in-scope P&L, category records, leaderboards, and position timelines.
  • Inspect large trades, counterparties, review scores, and suspicious-trade indicators.
  • Query market flow, sharp-money activity, graded holders, candles, and Edge Hunter signals.
  • Search markets and explore games, coverage, published research, reports, and report snapshots.
  • Use configurable Edge Hunter selections for sports, esports, leagues, market types, markets, events, and series.
  • Retrieve data through the sandbox or authenticated live access.

The server's API and SDK ecosystem includes Python, Go, Node.js/TypeScript, and Rust resources. The MCP plugin is licensed under MIT.

Read the full README View source on GitHub

Reviews

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Frequently Asked Questions about 0xinsider

0xinsider is an MCP server that connects AI agents to read-only Polymarket sports and esports analytics. Its main tools cover traders, markets, games, large trades, positions, market flow, research, reports, and webhooks. Access uses OAuth 2.1 or an API key, with sandbox operations available without credentials.

Install the Agent Plugin with `npx skills add 0xinsider/agent-plugin`, or initialize the local MCP package with `npx -y @0xinsider/mcp@latest init`. You can also install an individual skill with the plugin's `--skill` option.

Set the MCP client's authorization header to `Bearer ${OXINSIDER_API_KEY}` when the client expands environment variables in headers. Use `https://api.0xinsider.com/api/v1/mcp` as the endpoint. Clients without that expansion can use their own MCP configuration to provide the API key.

Yes, documented operations are available from the sandbox without credentials. The sandbox can be queried through its sandbox API, and the agent registration endpoint can return a sandbox key plus instructions for obtaining live access.

It can read trader grades and P&L, large and suspicious trades, positions, market flow, sharp-money signals, games, market search results, published research, reports, coverage, and webhook-related data for sports and esports analytics.

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