---
title: "Express"
description: "Blyp skill preset for Express middleware, req.blypLog, and error middleware ordering."
canonical_url: "https://www.blyp.dev/docs/skills/express"
markdown_url: "https://www.blyp.dev/docs/skills/express.md"
last_updated: "2018-10-20"
x_farming_labs_generated_preamble: true
---

# Express
URL: /docs/skills/express
LLM index: /llms.txt
Description: Blyp skill preset for Express middleware, req.blypLog, and error middleware ordering.

import { SkillInstall } from "@/app/components/skill-install";
import { SkillSource } from "@/app/components/skill-source";

# Blyp Express

Install `blyp-express` after `blyp-core` when the application runs on Express. This preset focuses on correct middleware order, `req.blypLog`, and making sure `createExpressErrorLogger()` runs before the final error responder.

## When to install it

- Blyp is mounted in an Express app or router
- handlers need request-scoped logging via `req.blypLog`
- the app needs reliable `http_error` emission for thrown errors

## What it covers

- `createLogger()` middleware
- `req.blypLog`
- `createExpressErrorLogger()`
- safe Express error middleware ordering

<SkillInstall slug="express" />

## Related docs

- [Express](/docs/integrations/express)
- [Configuration](/docs/configuration)

<SkillSource slug="express" />

## Sitemap

See the full [sitemap](/sitemap.md) for all pages.
Docs-scoped sitemap: [/docs/sitemap.md](/docs/sitemap.md).
Well-known sitemap: [/.well-known/sitemap.md](/.well-known/sitemap.md).