identity-service

The MCP server is built on FastAPI and uses modern HTTP clients (httpx). It delegates authentication and authorization to an external 'AGNTCY Identity Service' via a custom middleware (`IdentityServiceMCPMiddleware`). This middleware ensures that incoming requests are authorized using an API key and are linked to a specific tool or agent. No obvious direct 'eval' or raw system command execution is observed in the truncated sample code for the MCP server itself. Input validation for the `trade_currency_exchange` and `get_currency_exchange_rate` tools is critical but not fully visible in the truncated tool definitions; assuming FastAPI's typing provides some level of validation. A potential risk lies in the `CURRENCY_EXCHANGE_API_URL` environment variable, which, if misconfigured or pointing to a malicious external API, could lead to data integrity issues or SSRF (Server-Side Request Forgery) vulnerabilities. The overall security of this MCP server strongly depends on the robustness and proper configuration of the external Identity Service it relies on, which in development setup uses weak default credentials (e.g., 'postgres' password, 'default' vault token) as noted in the main backend's `env_setup.sh` script.