Estimate referral fee + FBA fees for selling an ASIN at a given price. Useful before creating a listing or when repricing.
AI agents call get_my_fees_estimate_for_asin to retrieve information from Mcp Ap2 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or calculates fee estimates based on input parameters. It has no side effects; it does not create listings, process payments, delete data, or execute external operations. It is a pure informational/computational read operation that returns data to inform decision-making.
From the tool's definition Tool name contains 'get' and 'estimate'; description states it retrieves fee calculations 'for selling an ASIN at a given price' with no indication of modifying, deleting, executing commands, or moving money.
Documented attack patterns abuse exactly the kind of access get_my_fees_estimate_for_asin gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for get_my_fees_estimate_for_asin:
{
"version": "1",
"default": "deny",
"tools": {
"get_my_fees_estimate_for_asin": {}
}
}get_my_fees_estimate_for_asin is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Estimate referral fee + FBA fees for selling an ASIN at a given price. Useful before creating a listing or when repricing. It is categorised as a Read tool in the Mcp Ap2 MCP Server, which means it retrieves data without modifying state.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for get_my_fees_estimate_for_asin: 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 Mcp Ap2. Nothing to install.
get_my_fees_estimate_for_asin 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 get_my_fees_estimate_for_asin 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 get_my_fees_estimate_for_asin. 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.
get_my_fees_estimate_for_asin is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
1300 Mcp Ap2 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.