Send USDC directly to ANY wallet address via x402 payment. Just provide to_address and amount - the flow auto-completes: 1) Pay 0.01 USDC platform fee 2) Pay the amount directly to destination. Tokens go from you to recipient. Perfect for paying agents, tipping, or sending to any address.
Part of the Xportalx server.
Free to start. No card required.
AI agents use x402_send to create or modify resources in Xportalx. 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 x402_send 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 Xportalx.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"x402_send": {
"limits": [
{
"counter": "x402_send_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Xportalx policy for all 29 tools.
These attack patterns abuse exactly the kind of access x402_send 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.
Send USDC directly to ANY wallet address via x402 payment. Just provide to_address and amount - the flow auto-completes: 1) Pay 0.01 USDC platform fee 2) Pay the amount directly to destination. Tokens go from you to recipient. Perfect for paying agents, tipping, or sending to any address.. It is categorised as a Write tool in the Xportalx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Xportalx MCP server in PolicyLayer and add a rule for x402_send: 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.
x402_send 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 x402_send 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 x402_send. 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.
x402_send 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.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.