Execute a token swap on Base via 0x DEX Aggregator. AI-ENHANCED: Accepts natural language like 'swap 10 USDC for VIRTUAL'. THREE MODES: (1) PRIVY MODE (RECOMMENDED): Provide owner_wallet - uses your secure Privy custodial wallet (create one first with create_wallet tool). (2) PRIVATE KEY MODE: Pr...
Part of the Xportalx server.
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AI agents invoke swap to trigger processes or run actions in Xportalx. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
swap can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"swap": {
"limits": [
{
"counter": "swap_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Xportalx policy for all 29 tools.
These attack patterns abuse exactly the kind of access swap gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Execute a token swap on Base via 0x DEX Aggregator. AI-ENHANCED: Accepts natural language like 'swap 10 USDC for VIRTUAL'. THREE MODES: (1) PRIVY MODE (RECOMMENDED): Provide owner_wallet - uses your secure Privy custodial wallet (create one first with create_wallet tool). (2) PRIVATE KEY MODE: Provide privateKey - server signs with your key (less secure). (3) BRIDGE MODE: Provide takerAddress only - returns a URL where you sign with browser wallet. Cost: 0.10 USDC. It is categorised as a Execute tool in the Xportalx MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Xportalx MCP server in PolicyLayer and add a rule for swap: 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 Xportalx. Nothing to install.
swap is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the swap 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 swap. 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.
swap is provided by the Xportalx MCP server (https://fflpdljiuruqdnewvwkk.supabase.co/functions/v1/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 29 Xportalx tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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