Get comprehensive portfolio overview for a wallet address or entity. Hyperliquid perpetual positions include liquidation prices to support risk analysis workflows. For wallet addresses, supports different modes: - 'fast-mode-default': Wallet balances + Hyperliquid positions (skip defi, for fast m...
Part of the Nansen-MCP server.
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AI agents call address_portfolio to retrieve information from Nansen-MCP 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 address_portfolio 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": {
"address_portfolio": {}
}
}See the full Nansen-MCP policy for all 24 tools.
These attack patterns abuse exactly the kind of access address_portfolio 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.
Get comprehensive portfolio overview for a wallet address or entity. Hyperliquid perpetual positions include liquidation prices to support risk analysis workflows. For wallet addresses, supports different modes: - 'fast-mode-default': Wallet balances + Hyperliquid positions (skip defi, for fast mode only) - 'all': Wallet balances + DeFi positions + Hyperliquid positions - 'wallet_balances': Only token balances (tokens and native coins across all chains) - 'defi': Only DeFi positions (lending, staking, LP tokens, etc., excluding Hyperliquid) - 'hyperliquid': Only Hyperliquid positions (perps include liquidation price, plus spot, staking, vault, free tokens) For entities (e.g., "Binance", "Paradigm Fund"), only on-chain token balances are returned, aggregated across all addresses associated with the entity. This tool provides flexible portfolio analysis in a single request, allowing users to focus on specific aspects of their holdings. The output is pre-formatted markdown that should be presented exactly as returned, preserving all tables, sections, and formatting without reinterpretation. Example Usage: Get full comprehensive portfolio for a wallet: { "walletAddress": "0x28c6c06298d514db089934071355e5743bf21d60", "mode": "all" } Get only DeFi positions (returns raw JSON): { "walletAddress": "0x28c6c06298d514db089934071355e5743bf21d60", "mode": "defi" } Get only Hyperliquid positions (returns raw JSON): { "walletAddress": "0x28c6c06298d514db089934071355e5743bf21d60", "mode": "hyperliquid" } Get token balances for an entity: { "entity_id": "Binance" }. It is categorised as a Read tool in the Nansen-MCP MCP Server, which means it retrieves data without modifying state.
Register the Nansen- MCP server in PolicyLayer and add a rule for address_portfolio: 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 Nansen-MCP. Nothing to install.
address_portfolio 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 address_portfolio 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 address_portfolio. 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.
address_portfolio is provided by the Nansen- MCP server (nansen-ai/Nansen-MCP). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 24 Nansen-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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