HDD and CDD over a window, with per-day rows. Used for HVAC sizing, utility bill reconciliation, energy forecasting. Default base 65°F is the NOAA HVAC standard.
Part of the Ready APIs server.
Free to start. No card required.
AI agents call weather_degree_days to retrieve information from Ready APIs 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 weather_degree_days 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": {
"weather_degree_days": {}
}
}See the full Ready APIs policy for all 129 tools.
These attack patterns abuse exactly the kind of access weather_degree_days 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.
HDD and CDD over a window, with per-day rows. Used for HVAC sizing, utility bill reconciliation, energy forecasting. Default base 65°F is the NOAA HVAC standard.. It is categorised as a Read tool in the Ready APIs MCP Server, which means it retrieves data without modifying state.
Register the Ready APIs MCP server in PolicyLayer and add a rule for weather_degree_days: 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 Ready APIs. Nothing to install.
weather_degree_days 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 weather_degree_days 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 weather_degree_days. 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.
weather_degree_days is provided by the Ready APIs MCP server (https://readyapis.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 129 Ready APIs tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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