# get_supported_chains

Maps to GET /chains. Lists supported EVM chains with chain IDs and native gas tokens: Ethereum, Arbitrum, Base, Polygon, BNB Chain.

Agent View of the PolicyLayer registry record for `get_supported_chains`. HTML page: https://policylayer.com/tools/defire-business-swapwizard-mcp/get-supported-chains

## Facts

- Tool: `get_supported_chains`
- Server: Swapwizard (`@swapwizard/mcp-server`) — https://policylayer.com/tools/defire-business-swapwizard-mcp.md
- Install: `npx -y @swapwizard/mcp-server`
- Homepage: https://github.com/DeFiRe-business/swapwizard-mcp
- Risk category: Read (Low risk)
- Registry record: grade D, identity unverified
- Server auth posture: open
- 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": "get_supported_chains",
    "arguments": {}
  }
}
```

## Why get_supported_chains is rated Low

This tool retrieves static configuration information (supported chains, chain IDs, gas tokens) without modifying state, executing code, or moving funds. It is a simple informational query with minimal risk even if misused by an AI agent.

From the tool's own definition: "Tool name 'get_supported_chains' with 'Maps to GET /chains. Lists supported EVM chains' — pure data retrieval with no mutations or side effects."

## Use case

AI agents call get_supported_chains to retrieve information from Swapwizard 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 Swapwizard:

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

## Other tools on Swapwizard (10)

- `get_clean_quote` — Financial — https://policylayer.com/tools/defire-business-swapwizard-mcp/get-clean-quote.md
- `zap_into_lp_position` — Financial — https://policylayer.com/tools/defire-business-swapwizard-mcp/zap-into-lp-position.md
- `zap_out_of_lp_position` — Financial — https://policylayer.com/tools/defire-business-swapwizard-mcp/zap-out-of-lp-position.md
- `analyze_pool` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/analyze-pool.md
- `check_api_health` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/check-api-health.md
- `get_setup_guide` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/get-setup-guide.md
- `get_supported_dexes` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/get-supported-dexes.md
- `get_swap_quote` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/get-swap-quote.md
- `list_user_lp_positions` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/list-user-lp-positions.md
- `search_liquidity_pools` — Read — https://policylayer.com/tools/defire-business-swapwizard-mcp/search-liquidity-pools.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=defire-business-swapwizard-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/defire-business-swapwizard-mcp