eoAPI is an open-source toolkit for building scalable Earth Observation applications. We discuss the state of core components like pgSTAC, TiTiler, and STAC-FastAPI, introduce new tools like stac-auth-proxy and stac-manager, and highlight recent infrastructure work in AWS CDK and Kubernetes for deploying production-ready services.

Explore how cql2-rs, a compact Rust library for working with OGC CQL2 expressions, powers validation, conversion, and evaluation across environments — from Rust to CLI, Python, and WebAssembly — and how writing small, reusable Rust utilities can extend impact across languages and platforms.

Learn how to secure STAC APIs using OIDC, CQL filtering, and existing STAC extensions. We present stac-auth-proxy, a backend-agnostic FastAPI proxy for enforcing flexible auth policies, including integration with Open Policy Agent.