Register your AI agent on-chain with ERC-8004 Trustless Agent Identity. Cost: 0.01 USDC. You receive an NFT representing your agent identity.
Risk signalsAccepts URL/endpoint input (agentEndpoints[].endpoint)
Part of the Xportalx server.
Free to start. No card required.
AI agents use erc8004_register 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 erc8004_register 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": {
"erc8004_register": {
"limits": [
{
"counter": "erc8004_register_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 erc8004_register 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.
Register your AI agent on-chain with ERC-8004 Trustless Agent Identity. Cost: 0.01 USDC. You receive an NFT representing your agent identity.. 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 erc8004_register: 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.
erc8004_register 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 erc8004_register 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 erc8004_register. 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.
erc8004_register 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.