Get the input/output schema and auth mode (paid or SIWX) for a single endpoint. Call this to see exactly what fields the request body expects and what the response contains. Returns the schema from the origin's OpenAPI spec. Optionally pass sample_input_body to probe the endpoint live (without pa...
Risk signalsAccepts URL/endpoint input (url) · Accepts raw HTML/template content (body)
Part of the Agentcash server.
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AI agents call check_endpoint_schema to retrieve information from Agentcash 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 check_endpoint_schema 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": {
"check_endpoint_schema": {}
}
}See the full Agentcash policy for all 11 tools.
These attack patterns abuse exactly the kind of access check_endpoint_schema 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.
Get the input/output schema and auth mode (paid or SIWX) for a single endpoint. Call this to see exactly what fields the request body expects and what the response contains. Returns the schema from the origin's OpenAPI spec. Optionally pass sample_input_body to probe the endpoint live (without payment) for an exact price quote — do this when pricing is dynamic (range-based or variable), or when you're unsure about the input schema. Treat auth mode as advisory: fetch handles both SIWX and paid routes.. It is categorised as a Read tool in the Agentcash MCP Server, which means it retrieves data without modifying state.
Register the Agentcash MCP server in PolicyLayer and add a rule for check_endpoint_schema: 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 Agentcash. Nothing to install.
check_endpoint_schema 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 check_endpoint_schema 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 check_endpoint_schema. 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.
check_endpoint_schema is provided by the Agentcash MCP server (agentcash). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Agentcash tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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