Compare all APIs within a category side by side, with a summary of auth and HTTPS support.
AI agents call compare_apis to retrieve information from Mcp Public Apis without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and presents information about existing APIs without creating, modifying, deleting, or executing any operations. It is a pure data retrieval and presentation operation, fitting the Read category. Severity is low because misuse would only expose informational data about public APIs with no side effects or blast radius.
From the tool's definition Tool performs comparison and retrieval of API metadata (auth support, HTTPS support) within a category. Description indicates read-only operations: 'Compare all APIs within a category side by side, with a summary of auth and HTTPS support.' No modification,…
Attacks that exploit this kind of access
Compare all APIs within a category side by side, with a summary of auth and HTTPS support. It is categorised as a Read tool in the Mcp Public Apis MCP Server, which means it retrieves data without modifying state.
Register the Mcp Public Apis MCP server in PolicyLayer and add a rule for compare_apis: 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 Public Apis. Nothing to install.
compare_apis 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 compare_apis 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 compare_apis. 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.
compare_apis is provided by the Mcp Public Apis MCP server (josephsenior/pblic-apis-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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