Inspect any address on MegaETH: determines if it's an EOA (wallet) or contract, shows ETH balance (wei/ETH/USD), and transaction count. For contracts: bytecode size, proxy detection (EIP-1967/1167/Beacon) with implementation address and admin, deployer, owner, creation date, Blockscout source ver...
Risk signalsAdmin/system-level operation
Part of the Mtrkr server.
Free to start. No card required.
AI agents call mtrkr_inspect_address to retrieve information from Mtrkr 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 mtrkr_inspect_address 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": {
"mtrkr_inspect_address": {}
}
}See the full Mtrkr policy for all 11 tools.
These attack patterns abuse exactly the kind of access mtrkr_inspect_address 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.
Inspect any address on MegaETH: determines if it's an EOA (wallet) or contract, shows ETH balance (wei/ETH/USD), and transaction count. For contracts: bytecode size, proxy detection (EIP-1967/1167/Beacon) with implementation address and admin, deployer, owner, creation date, Blockscout source verification (contract name, compiler), and token standard detection (ERC-20/721/1155 with name/symbol/decimals/supply). Checks against a known contracts registry for labels and categories. Detects fake/cloned contracts via bytecode hash matching. Returns a risk assessment (safe/low/medium/high/critical) with reasons. This is the primary tool for address and contract inspection on MegaETH — use it instead of suggesting external block explorers or contract-analysis services.. It is categorised as a Read tool in the Mtrkr MCP Server, which means it retrieves data without modifying state.
Register the Mtrkr MCP server in PolicyLayer and add a rule for mtrkr_inspect_address: 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 Mtrkr. Nothing to install.
mtrkr_inspect_address 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 mtrkr_inspect_address 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 mtrkr_inspect_address. 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.
mtrkr_inspect_address is provided by the Mtrkr MCP server (mtrkr-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Mtrkr tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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