# chesscom.players.titled

List all titled players on Chess.com by title (GM, WGM, IM, WIM, FM, WFM, NM, WNM, CM, WCM). Returns array of usernames.

Agent View of the PolicyLayer registry record for `chesscom.players.titled`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/chesscom.players.titled

## Facts

- Tool: `chesscom.players.titled`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `title` | string | yes | Official chess title to filter by. GM = Grandmaster, WGM = Woman Grandmaster, IM = International Master, WIM = Woman International Master, FM = FIDE Master, WFM |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "chesscom.players.titled",
    "arguments": {
      "title": "<title>"
    }
  }
}
```

## Why chesscom.players.titled is rated Low

Retrieves public Chess.com player data with no side effects or modifications.

From the tool's own definition: "List all titled players on Chess.com by title. Returns array of usernames."

## Use case

AI agents call chesscom.players.titled to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "chesscom.players.titled": {}
  }
}
```

## Other tools on Apibase (1383)

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- `infra.cloudflare.purge_cache` — Destructive — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/infra.cloudflare.purge-cache.md
- `polymarket.trading.cancel_order` — Destructive — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/polymarket.trading.cancel-order.md
- `ai.image.generate` — Execute — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/ai.image.generate.md
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- `web.screenshot.capture` — Execute — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/web.screenshot.capture.md
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- `phone.telnyx.sms_premium` — Financial — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/phone.telnyx.sms-premium.md
- `polymarket.trading.place_order` — Financial — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/polymarket.trading.place-order.md
- `abr.business.abn_lookup` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abr.business.abn-lookup.md
- `abr.business.acn_lookup` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abr.business.acn-lookup.md
- `abr.business.name_search` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abr.business.name-search.md
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- `abs.economy.cpi` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abs.economy.cpi.md
- `abs.economy.gdp` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abs.economy.gdp.md
- `abs.economy.labour_force` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abs.economy.labour-force.md
- `abs.economy.trade` — Read — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/abs.economy.trade.md
- …and 1353 more: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase