Website specification — HTML, accessibility, security, SEO, agent-readiness. Platform-agnostic, sourced, MIT.

A curated list of well-known URIs, resources, guides and tools (RFC 5785)

Specs and documentation for all DID-related /.well-known resources

A minimal self-hosted mail node over HTTP. One file, no SMTP.

Simple Features Well-Known Binary Java Library

Nuxt 3 module to add well-known URIs using middlewares

An open standard for discovering the legal context of agentic commerce transactions.

A plugin that enables "Well-Known URIs" support for WordPress (RFC 5785: http://tools.ietf.org/html/rfc5785).

Kirby3 plugin to provide wellknown files (/robots.txt, .well-known/, etc)

.well-known/matrix/* handler as a CloudFlare worker

Spec-compliant Universal Commerce Protocol (UCP) profile generator for Magento 2. Serves /.well-known/ucp at protocol version 2026-04-08 with ECDSA P-256 signing keys and per-store-view capability toggles

Coordinate Reference Systems Java Library

<link /> is fine, but I feel like there should be a standard for a site, not a page, to share a “list of feeds associated with a site”.

Specification for the .well-known/feeds resource identifier

Simple Features Well-Known Text Java Library

GitHub page for OpenID Configuration and JWKs (.well-known, openid-configuration, jwks.json)

Machine-readable AI permissions for websites. A consolidated spec at /.well-known/ai-policy.json for declaring how AI agents may train on, search, or use your content.

Simple Features Well-Known Binary iOS Library

AI setup guides can hide instructions a model reads but a human never sees. GuideCheck is the plain-text standard that makes an assistant's instruction surface reviewable before it acts.

Nexus-AGI — a public AGI service directory & API registry for autonomous agents. Supports .well-known autodiscovery, OpenAPI schemas, and integration with AI models, tools, and services.