Get DEX trades for a specific token. Modes: - onchain_tokens (default): Analyze on-chain tokens by contract address - perps: Analyze Hyperliquid perpetual futures by symbol (chain auto-set to "hyperliquid") Args: request: TokenDexTradesRequest containing parameters, pagination settings, and optio...
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AI agents use token_dex_trades to create or modify resources in Nansen-MCP. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call token_dex_trades repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Nansen-MCP.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"token_dex_trades": {
"limits": [
{
"counter": "token_dex_trades_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Nansen-MCP policy for all 24 tools.
These attack patterns abuse exactly the kind of access token_dex_trades gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Get DEX trades for a specific token. Modes: - onchain_tokens (default): Analyze on-chain tokens by contract address - perps: Analyze Hyperliquid perpetual futures by symbol (chain auto-set to "hyperliquid") Args: request: TokenDexTradesRequest containing parameters, pagination settings, and optional sorting Returns: DEX trading activity as markdown. Returns empty string if no trades found. Common Columns (all modes): - Time: Timestamp when the trade occurred (datetime: YYYY-MM-DD HH:MM:SS) - Token: Symbol of the token/perpetual contract - Price USD: Price per token in USD at time of trade (currency formatted) - Value USD: Total USD value of the trade/position change (currency formatted) - Trader: Nansen label or name of the trading address - Tx Hash: Blockchain transaction hash for verification onchain_tokens mode: - Action: Trade direction - BUY or SELL from perspective of the token - Token Amount: Quantity of the target token traded (numeric) - Traded Amount: Quantity of the other token in the swap (numeric) - Traded Token: Symbol of the token traded against (e.g., WETH, USDC) perps mode: - Side: Position direction - Long or Short - Action: Order action - Add, Reduce, Open, Close - Size: Quantity of the perpetual contract (numeric) Sorting Options (all fields support "asc"/"desc"): Available for sorting: timestamp, valueUsd, amount, priceUsd Examples: # On-chain tokens (default mode) { "mode": "onchain_tokens", "chain": "ethereum", "tokenAddress": "0xa0b86a33e6b6c4b3add000b44b3a1234567890ab", "dateRange": {"from": "24H_AGO", "to": "NOW"} } # Hyperliquid perpetual futures { "mode": "perps", "tokenAddress": "PENGU", "dateRange": {"from": "7D_AGO", "to": "NOW"}, "action": "Open", "side": "Long" } # Find biggest trades by USD value (whale watching) { "mode": "onchain_tokens", "chain": "ethereum", "tokenAddress": "0xa0b86a33e6b6c4b3add000b44b3a1234567890ab", "dateRange": {"from": "7D_AGO", "to": "NOW"}, "order_by": "valueUsd", "order_by_direction": "desc" } # Find who bought the dip vs who bought the top (price analysis) { "chain": "ethereum", "tokenAddress": "0xa0b86a33e6b6c4b3add000b44b3a1234567890ab", "dateRange": {"from": "30D_AGO", "to": "NOW"}, "order_by": "priceUsd", "order_by_direction": "asc" }. It is categorised as a Write tool in the Nansen-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Nansen- MCP server in PolicyLayer and add a rule for token_dex_trades: 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.
token_dex_trades is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the token_dex_trades 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 token_dex_trades. 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.
token_dex_trades 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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