get_air_quality
Get current air quality data for any city. Uses Open-Meteo Air Quality API (free, no key) after geocoding the city. Returns European AQI, US AQI, PM2.5, PM10, and ozone levels. Parameters: city — City name to check air quality for (required), e.g. "London".
This record as markdown: /tools/com-gadgethumans-swarm-x402-middleware/get-air-quality.md
What get_air_quality does on X402 Middleware
AI agents call get_air_quality to retrieve information from X402 Middleware without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
city | string | Yes |
Parameters from the server's own tool schema.
Why get_air_quality is rated Low
This tool only queries and returns environmental data from a public API. There are no write, execute, destructive, or financial operations involved. The worst-case misuse (repeatedly querying for different cities) would be a minor API rate-limit issue, not a security concern. Classification as 'Read' is appropriate.
From the tool's definition Tool 'get_air_quality' retrieves current air quality data for a city using the Open-Meteo Air Quality API.
Attacks that exploit this kind of access
The rule that runs get_air_quality safely
PolicyLayer is an MCP gateway: it sits between your AI agents and X402 Middleware, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_air_quality, this is the rule to start with:
get_air_quality is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect X402 Middleware, apply this rule, and every get_air_quality call is checked against it from then on.
Questions about get_air_quality
Get current air quality data for any city. Uses Open-Meteo Air Quality API (free, no key) after geocoding the city. Returns European AQI, US AQI, PM2.5, PM10, and ozone levels. Parameters: city — City name to check air quality for (required), e.g. "London". It is categorised as a Read tool in the X402 Middleware MCP Server, which means it retrieves data without modifying state.
get_air_quality accepts 1 parameter: city. Required: city. The full parameter table on this page comes from the server's own tool schema.
Register the X402 Middleware MCP server in PolicyLayer and add a rule for get_air_quality: 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 X402 Middleware. Nothing to install.
get_air_quality 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_air_quality 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_air_quality. 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_air_quality is provided by the X402 Middleware MCP server (@gadgethumans/x402). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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