# schwab_option_chain_by_expiration

A read tool on the Open Stocks MCP MCP server.

Agent View of the PolicyLayer registry record for `schwab_option_chain_by_expiration`. HTML page: https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-option-chain-by-expiration

## Facts

- Tool: `schwab_option_chain_by_expiration`
- Server: Open Stocks MCP (`open-agent-tools/open-stocks-mcp`) — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp.md
- Homepage: https://github.com/Open-Agent-Tools/open-stocks-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "schwab_option_chain_by_expiration",
    "arguments": {}
  }
}
```

## Why schwab_option_chain_by_expiration is rated Low

This tool retrieves option chain information from Schwab, which is a read-only query operation with no side effects. It does not create positions, execute trades, modify account settings, or delete data. While the data is financial in nature, the tool itself performs only data retrieval without moving money or creating financial obligations.

From the tool's own definition: "Tool name 'schwab_option_chain_by_expiration' indicates retrieval of option chain data filtered by expiration date."

## Use case

AI agents call schwab_option_chain_by_expiration to retrieve information from Open Stocks MCP 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 Open Stocks MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "schwab_option_chain_by_expiration": {}
  }
}
```

## Other tools on Open Stocks MCP (151)

- `cancel_all_option_orders_tool` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-all-option-orders-tool.md
- `cancel_all_stock_orders_tool` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-all-stock-orders-tool.md
- `cancel_option_order_by_id` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-option-order-by-id.md
- `cancel_stock_order_by_id` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/cancel-stock-order-by-id.md
- `remove_from_watchlist` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/remove-from-watchlist.md
- `schwab_cancel_all_option_orders` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-all-option-orders.md
- `schwab_cancel_all_stock_orders` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-all-stock-orders.md
- `schwab_cancel_option_order` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-option-order.md
- `schwab_cancel_order` — Destructive — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-cancel-order.md
- `buy_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/buy-option-limit.md
- `buy_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/buy-stock-limit.md
- `buy_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/buy-stock-market.md
- `option_credit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/option-credit-spread.md
- `option_debit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/option-debit-spread.md
- `schwab_buy_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-buy-stock-limit.md
- `schwab_buy_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-buy-stock-market.md
- `schwab_option_buy_to_open` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-option-buy-to-open.md
- `schwab_option_sell_to_close` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-option-sell-to-close.md
- `schwab_order_buy_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-buy-option-limit.md
- `schwab_order_option_credit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-option-credit-spread.md
- `schwab_order_option_debit_spread` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-option-debit-spread.md
- `schwab_order_sell_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-sell-option-limit.md
- `schwab_order_sell_stop` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-order-sell-stop.md
- `schwab_place_order` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-place-order.md
- `schwab_replace_order` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-replace-order.md
- `schwab_sell_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-sell-stock-limit.md
- `schwab_sell_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/schwab-sell-stock-market.md
- `sell_option_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/sell-option-limit.md
- `sell_stock_limit` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/sell-stock-limit.md
- `sell_stock_market` — Financial — https://policylayer.com/tools/open-agent-tools-open-stocks-mcp/sell-stock-market.md
- …and 121 more: https://policylayer.com/tools/open-agent-tools-open-stocks-mcp.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=open-agent-tools-open-stocks-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/open-agent-tools-open-stocks-mcp