# Show HN: backpressure.systems adds MCP and CLI

> Source: <https://backpressure.systems/mcp-and-cli>
> Published: 2026-08-26 10:59:32+00:00

# Backpressure: see what breaks before your users do

Backpressure is a web-first, interactive load simulator for system design and LLM serving. You
build a system on a canvas, apply real concurrent load, and watch where it breaks - queue depth,
time-to-first-token, throughput, and the moment it saturates and collapses. A deterministic
queueing engine backs every run, so the same design and the same load always produce the same
result, and each run is a shareable, reproducible artifact.

The launch focus is LLM serving: assemble a serving setup (model, quant, GPU or hardware,
batching), simulate concurrent users, and watch time-to-first-token and tokens per second degrade
until the rig recovers or falls over. The same engine and visual language extend to general system
design - load balancers, queues, caches, and datastores under pressure.

The interactive canvas needs JavaScript. Explore Backpressure without it here: