Check multiple ERC20 token balances for a wallet in a single call using Multicall3. Much more efficient than calling get-token-balance repeatedly. Also returns the native token balance. Use this to scan a wallet's portfolio across many tokens on one chain.
Part of the LI FI server.
Free to start. No card required.
AI agents call get-token-balances to retrieve information from LI FI without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get-token-balances only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get-token-balances": {}
}
}See the full LI FI policy for all 25 tools.
These attack patterns abuse exactly the kind of access get-token-balances gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Check multiple ERC20 token balances for a wallet in a single call using Multicall3. Much more efficient than calling get-token-balance repeatedly. Also returns the native token balance. Use this to scan a wallet's portfolio across many tokens on one chain.. It is categorised as a Read tool in the LI FI MCP Server, which means it retrieves data without modifying state.
Register the LI FI MCP server in PolicyLayer and add a rule for get-token-balances: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches LI FI. Nothing to install.
get-token-balances is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get-token-balances rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get-token-balances. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get-token-balances is provided by the LI FI MCP server (li-fi/lifi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 25 LI FI tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.