# bridge_transfer

Execute a bridge transfer of ERC20 tokens from one chain to another. Requires PRIVATE_KEY environment variable. Steps: approve token spending → call bridge.transferTokens() → returns tx hash and sequence number.

Agent View of the PolicyLayer registry record for `bridge_transfer`. HTML page: https://policylayer.com/tools/0xaibridge-mcp/bridge-transfer

## Facts

- Tool: `bridge_transfer`
- Server: 0xaibridge (`@0xaibridge/mcp`) — https://policylayer.com/tools/0xaibridge-mcp.md
- Install: `npx -y @0xaibridge/mcp`
- Homepage: https://www.npmjs.com/package/@0xaibridge/mcp
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Approval-gated

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

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

## Why bridge_transfer is rated Critical

bridge_transfer moves real money, and an autonomous agent will call it with the same confidence it calls a search tool. A misread instruction or an injected prompt is all it takes to drain an account or blow a budget.

## Use case

AI agents use bridge_transfer to commit financial operations through 0xaibridge, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches 0xaibridge:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "bridge_transfer": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on 0xaibridge (4)

- `bridge_estimateFee` — Read — https://policylayer.com/tools/0xaibridge-mcp/bridge-estimatefee.md
- `bridge_getChainInfo` — Read — https://policylayer.com/tools/0xaibridge-mcp/bridge-getchaininfo.md
- `bridge_getHealth` — Read — https://policylayer.com/tools/0xaibridge-mcp/bridge-gethealth.md
- `bridge_getRoute` — Read — https://policylayer.com/tools/0xaibridge-mcp/bridge-getroute.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=0xaibridge-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0xaibridge-mcp