Where does your LLM API bill actually go? I profiled mine and the results were embarrassing

I built a JSON5 / json parser for Go and TinyGo, drop-in familiar API, no reflection

Building a Multi-Tenant Auth API using Rust, Traefik, and Ory Kratos

Built a high-performance JSON visualizer & API profiler entirely with Rust and egui (J-RAY PRO)

Gopher Glide (gg) — Zero-scripting API load testing in Go with Behavioral Profiling Snapshots, Semantic Diffing, and a JetBrains Plugin

Go library that anonymizes PII before LLM API calls — offline, zero deps, 0.019ms

Ultrachess: chess.js-compatible API with 50x throughput via Rust + WASM

ASBFlow - Simplified Python API for Azure Service Bus

Benchmarking a hybrid threat detection system (backend + APIs)

What's a tool that you think is missing from the Rust Web API building ecosystem?