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Docs
API
Utilities
Components
Demos
GitHub

Changelog
Philosophy
Showcase
Sponsor

Getting started

What these are
The sdxc command
Build an app
Deploy your app
How it fits together

Packages à la carte

Install and pin
Your first handler
Use the packages outside Remix
Add packages to an existing app
Pick packages by problem

Recipes

Build a blog
Build a SaaS
Build a public JSON API
Build an app agents can use
Build a command-line tool
Add a contact form
Invite a teammate
Add a newsletter sign-up
Let users export their data
Import a large file
Add profile pictures
Send a weekly digest
Get paged when a dependency is down
Watch your domains
Show link previews
Publish an events calendar
Build a documentation site with search
Give your users API keys
Send signed webhooks

The sdxc command

Start a project
Copy UI components
Upgrade
Check a project
List routes
Inspect a project
Run your app's commands
Run CI
Deploy
Configuration
Errors and FAQ
Glossary

Generate files

Generate files
Scaffold a resource
Undo a make
Make a controller
Make a middleware
Make a validator
Make a job
Make a model
Make a migration
Make a factory
Make a service
Make a policy
Make an initializer
Make an email
Make an MCP tool or resource
Make a command
Make a Durable Object
Make a binding
Make a secret
Write a blueprint

Conventions

Result everywhere
Standard Schema validation
Subpath exports
Naming
Identifiers and secrets
Expressions over mutation
Log through the invocation
Errors as responses
Platform first

Routing & forms

Wire the router: middleware, context and services
Validate forms and route params
Read nested query strings and forms
Canonical URLs, lazy routes and header fields
Dates, text and identifiers
Translate your app
SEO, sitemaps and robots.txt
Read the visitor's browser and device

Interface

Build the interface with remix/component
Build a landing page
Load content as readers reach it
Build a search dialog
Keyboard shortcuts
Calendars, date ranges and time zones
Diff, show and review code
Build a pricing calculator
Play audio and video with chapters and transcripts

HTTP APIs

Build a JSON API with problem details
Describe your API with OpenAPI
Idempotent writes and JSON Merge Patch
Write a typed API client
Paginate lists
Parse and write Link headers
Accept JSON Patch updates

Sign-in & access

Sign in with OpenID Connect
Add passkeys
Add two-factor sign-in with TOTP
Issue and verify JWTs
Enterprise sign-on with SAML and SCIM
Custom domains for your customers
Decide who can do what

Security

Receive and send webhooks
Protect forms from bots and abuse
Security headers and CSP
Hash, sign and encrypt with Web Crypto
Fetch URLs a stranger chose
Client addresses and networks
Sign and verify HTTP requests
Sign files and security.txt with OpenPGP
Publish transparent statements with SCITT
Accept Privacy Pass tokens instead of a CAPTCHA

Data & billing

Cache on Cloudflare Workers
Query D1 and Durable Object SQL
Model your tables
Full-text search over SQLite
Feature flags
Rules your users write
Know where visitors come from
Charge for your app
Charge each request with x402

Jobs, email & alerts

Background jobs and cron
Retry on a growing delay
Send email
Run a newsletter list
Read and send mail over JMAP
Check a domain's email authentication
Send alerts to chat and paging services
Send browser push notifications
Watch when a domain expires

File & data formats

Import and export CSV
Stream JSON Lines
Stream several files as a ZIP
Address JSON with JSON Pointer
Query JSON with JSONPath
Hash and sign JSON in canonical form
Encode and decode CBOR
Expand URI templates
Model events and tasks as JSCalendar
Offer and import contact cards
Import and export DNS zone files

Markdown

A markdown content pipeline
Anchor, polish and lint markdown
Fill markdown templates with variables
Load live regions into markdown
Embed YouTube videos in markdown
Generate reference docs from JSDoc

Feeds & federation

Publish RSS, Atom and JSON feeds
Publish calendar feeds
Join the IndieWeb: Webmention and Micropub
Federate a site with ActivityPub
Read other people's pages

Images & documents

Draw social card images
Draw QR codes
Accept PNG avatars and draw placeholders
Draw charts as PNG images
Draw diagrams from text
Render TeX math
Set text as SVG paths
Generate PDF documents
Offer posts as EPUB ebooks
Write a book in Markdown

Testing & monitoring

Test your app
Test Workers apps
Write executable specs
Generate believable test data
Randomness you can replay
Run CI on your machine
Hold a package to a size budget
Sample HTTP latency against a running app
Logs, traces and timings
Dependency health checks
Estimate what your Worker costs

Command lines

Your app's command line
Build a command line
Use a package from the terminal
Read configuration files
Edit source files
Generate files from stubs

Agents & MCP

Expose your app over MCP
Call an MCP server
Bridge Agents to a modern MCP server

Releases

Versioning
Breaking changes
Corrected release notes
License
Changelog

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Can’t find it? Contact us

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Written by Sergio Xalambrí. Follow @sergiodxa for new packages, or sponsor the work.

© 2026 Sergio Xalambrí. MIT licensed.

Philosophy
Maintenance
Security
Changelog
Sponsor
GitHub

Documentation

Getting started

What these are
The sdxc command
Build an app
Deploy your app
How it fits together

Packages à la carte

Install and pin
Your first handler
Use the packages outside Remix
Add packages to an existing app
Pick packages by problem

Recipes

Build a blog
Build a SaaS
Build a public JSON API
Build an app agents can use
Build a command-line tool
Add a contact form
Invite a teammate
Add a newsletter sign-up
Let users export their data
Import a large file
Add profile pictures
Send a weekly digest
Get paged when a dependency is down
Watch your domains
Show link previews
Publish an events calendar
Build a documentation site with search
Give your users API keys
Send signed webhooks

The sdxc command

Start a project
Copy UI components
Upgrade
Check a project
List routes
Inspect a project
Run your app's commands
Run CI
Deploy
Configuration
Errors and FAQ
Glossary

Generate files

Generate files
Scaffold a resource
Undo a make
Make a controller
Make a middleware
Make a validator
Make a job
Make a model
Make a migration
Make a factory
Make a service
Make a policy
Make an initializer
Make an email
Make an MCP tool or resource
Make a command
Make a Durable Object
Make a binding
Make a secret
Write a blueprint

Conventions

Result everywhere
Standard Schema validation
Subpath exports
Naming
Identifiers and secrets
Expressions over mutation
Log through the invocation
Errors as responses
Platform first

Routing & forms

Wire the router: middleware, context and services
Validate forms and route params
Read nested query strings and forms
Canonical URLs, lazy routes and header fields
Dates, text and identifiers
Translate your app
SEO, sitemaps and robots.txt
Read the visitor's browser and device

Interface

Build the interface with remix/component
Build a landing page
Load content as readers reach it
Build a search dialog
Keyboard shortcuts
Calendars, date ranges and time zones
Diff, show and review code
Build a pricing calculator
Play audio and video with chapters and transcripts

HTTP APIs

Build a JSON API with problem details
Describe your API with OpenAPI
Idempotent writes and JSON Merge Patch
Write a typed API client
Paginate lists
Parse and write Link headers
Accept JSON Patch updates

Sign-in & access

Sign in with OpenID Connect
Add passkeys
Add two-factor sign-in with TOTP
Issue and verify JWTs
Enterprise sign-on with SAML and SCIM
Custom domains for your customers
Decide who can do what

Security

Receive and send webhooks
Protect forms from bots and abuse
Security headers and CSP
Hash, sign and encrypt with Web Crypto
Fetch URLs a stranger chose
Client addresses and networks
Sign and verify HTTP requests
Sign files and security.txt with OpenPGP
Publish transparent statements with SCITT
Accept Privacy Pass tokens instead of a CAPTCHA

Data & billing

Cache on Cloudflare Workers
Query D1 and Durable Object SQL
Model your tables
Full-text search over SQLite
Feature flags
Rules your users write
Know where visitors come from
Charge for your app
Charge each request with x402

Jobs, email & alerts

Background jobs and cron
Retry on a growing delay
Send email
Run a newsletter list
Read and send mail over JMAP
Check a domain's email authentication
Send alerts to chat and paging services
Send browser push notifications
Watch when a domain expires

File & data formats

Import and export CSV
Stream JSON Lines
Stream several files as a ZIP
Address JSON with JSON Pointer
Query JSON with JSONPath
Hash and sign JSON in canonical form
Encode and decode CBOR
Expand URI templates
Model events and tasks as JSCalendar
Offer and import contact cards
Import and export DNS zone files

Markdown

A markdown content pipeline
Anchor, polish and lint markdown
Fill markdown templates with variables
Load live regions into markdown
Embed YouTube videos in markdown
Generate reference docs from JSDoc

Feeds & federation

Publish RSS, Atom and JSON feeds
Publish calendar feeds
Join the IndieWeb: Webmention and Micropub
Federate a site with ActivityPub
Read other people's pages

Images & documents

Draw social card images
Draw QR codes
Accept PNG avatars and draw placeholders
Draw charts as PNG images
Draw diagrams from text
Render TeX math
Set text as SVG paths
Generate PDF documents
Offer posts as EPUB ebooks
Write a book in Markdown

Testing & monitoring

Test your app
Test Workers apps
Write executable specs
Generate believable test data
Randomness you can replay
Run CI on your machine
Hold a package to a size budget
Sample HTTP latency against a running app
Logs, traces and timings
Dependency health checks
Estimate what your Worker costs

Command lines

Your app's command line
Build a command line
Use a package from the terminal
Read configuration files
Edit source files
Generate files from stubs

Agents & MCP

Expose your app over MCP
Call an MCP server
Bridge Agents to a modern MCP server

Releases

Versioning
Breaking changes
Corrected release notes
License
Changelog

No page title matches. Try search instead.

Can’t find it? Contact us