All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights) vs Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP

AIOSEO – The Original AI SEO Plugin for WordPress All in One SEO is the original WordPress SEO plugin, founded in 2007 and trusted by over 3 million website owners and SEO experts. AIOSEO is a complete AI SEO plugin and marketing toolkit. Use it to optimize WordPress SEO settings, write and optimize content with AI, add schema markup, create XML sitemaps, add local SEO, track keyword rankings, automate internal linking, manage redirects, perform SEO audits, add Author SEO (EEAT), monitor SEO revisions, connect Google Search Console, and everything else an SEO Pro needs to rank higher in search engines. AIOSEO brings AI into every step of your SEO workflow. Generate SEO titles, meta descriptions, FAQs, images, and full articles with the built-in AI Content Generator, create schema markup with AI, and let AI agents like Claude and Gemini connect to your site to read and update its SEO through our built-in MCP server and WordPress Abilities API. AIOSEO is the AI SEO plugin built for how search works today, including AI search engines like ChatGPT, Google AI Overviews, and Perplexity. AIOSEO Pro This is the lite version of the All in One SEO Pro plugin that comes with all the SEO features you need to rank higher in search engines, including AI content and image generation, smart SEO schema markup, advanced SEO modules, the XML sitemap suite, local SEO module, keyword rank tracking, automatic internal linking, redirection manager, WooCommerce SEO, and tons more. Click here to get AIOSEO Pro and unlock all premium WordPress SEO features! Trusted by Over 3 Million Websites From bloggers to agencies to large eCommerce stores, AIOSEO holds a 4.7 out of 5 star rating from over 5,000 reviews and is built by the team behind WPForms, MonsterInsights, and OptinMonster. AI SEO: Write and Optimize Content with AI AIOSEO puts a complete AI SEO toolkit inside WordPress, so you can create optimized content faster and win at both traditional SEO and generative engine optimization (GEO) for AI search engines like ChatGPT. AI Content Generator Break through writer’s block and publish faster. Generate SEO titles, meta descriptions, FAQs, image alt text, and full articles in seconds with the built-in AI Content Generator, and write or rewrite content right inside the editor with the AI Assistant block. Bulk AI actions handle titles, descriptions, and alt text across many posts at once. AI Image Generator Create unique, on-brand images for your posts on demand with the built-in AI Image Generator, so you never have to pay for stock photos or open a design tool. AI Schema Generator Generate accurate structured data with AI using smart analysis and custom prompts, so you win rich snippets without learning schema or writing a line of code. AI Agents & Built-in MCP Server Manage your SEO just by chatting with AI. AIOSEO includes an MCP server and WordPress Abilities API support, so agents like Claude and Cursor can connect to your site and read, audit, and update its SEO data directly. Generative Engine Optimization (GEO) Get found in AI search, not just Google. Generative engine optimization (GEO) is the new frontier of SEO, and AIOSEO generates an llms.txt file so AI engines like ChatGPT, Google AI Overviews, and Perplexity can discover your content and surface it in their answers. AI Search Rank Tracking Track how your brand and content show up across AI search (ChatGPT, Google AI Overviews, and other engines) with our AI Insights keyword report, so you can see whether AI is putting you in front of customers and improve it. What Makes AIOSEO Better than Yoast, Rank Math and SEOPress? Our SEO features give you a competitive advantage over other WordPress SEO plugins like Yoast, Rank Math and SEOPress. Redirection Manager Stop broken links and dead pages from quietly costing you traffic and rankings. Our Redirection Manager automatically monitors and logs 404 errors, fixes them, and safely redirects old or changed URLs (or your whole site when you move domains) so you keep the SEO value you have already earned. Local Business SEO Rank higher on Google Maps and win customers away from your local competitors. Add your business hours, multiple locations, and contact details so Google can surface your phone number, email, and address in its Knowledge Panel and customers can reach you, all with our Local SEO module. Smart Schema Markup (aka Rich Snippets) Stand out in the search results and win more clicks with eye-catching rich snippets like star ratings, FAQs, prices, and recipes. Add FAQ, product, recipe, WooCommerce product, and dozens more schema types without touching code, plus the Organization and Person schema that power your Google Knowledge Graph panel, using our custom Schema Generator. Google Keyword Rank Tracking Know exactly where you rank and what to work on next. Track your Google keyword positions over time right inside your WordPress dashboard, import keywords from Google Search Console, and uncover related keywords and new ranking opportunities with our Search Statistics module. Author SEO (Google E-E-A-T) Build the author authority that Google rewards. Add author profile pages, bio boxes, and author schema that strengthen your E-E-A-T signals, a trust factor that helps you rank and stay resilient through Google’s Helpful Content updates. AI Link Assistant Keep visitors on your site longer and send ranking power to the pages that matter most. Get smart internal link suggestions automatically and add them in a couple of clicks with our internal linking algorithm. Unlimited Keywords Write content that actually ranks. Optimize for unlimited focus keywords with our TruSEO content analysis, which scores your on-page SEO and content readability and shows you exactly what to fix to climb the rankings. Smart XML Sitemap Get your content discovered and indexed faster. Advanced XML sitemaps hand search engines a clear roadmap of your site (with one-click Google Search Console setup), plus a Video sitemap, News sitemap, RSS sitemap, and HTML sitemap. Site Audit & SEO Checklist Find out exactly what is holding your rankings back. Get a full audit of every post and term, plus a step-by-step SEO checklist, with clear, prioritized fixes you can act on right away. SEO Revisions Never wonder whether an SEO change helped or hurt. Keep a full history of your SEO changes, see their impact over time, and roll back to any previous version in one click. Content Decay Tracking Catch declining content before it costs you traffic. Spot which pages are losing rankings and visits so you can refresh them and win that traffic back, with our Search Statistics module. Automatic Image SEO Get more traffic from Google Images with zero manual work. Generate image alt text with AI, plus automatic image titles and clean SEO filenames. Smart Breadcrumbs Give visitors and Google an easy path through your site, and earn breadcrumb links in search results, with full JSON-LD schema support. Robots.txt Editor & Robots Meta Control what search engines crawl and index, right from WordPress: edit your robots.txt and set per-page robots meta tags (noindex, nofollow, no archive, max snippet, and more), with no FTP or code needed. Table of Contents Help readers and Google navigate your content, and earn jump-to links in the search results. Automatically generate a table of contents with our redesigned block (with multi-block and accordion layouts), and customize, hide, or reorder headings. Who Is AIOSEO For? SEO matters for every website, and AIOSEO is built for all of them: Business owners & bloggers who want higher rankings without hiring an SEO expert. eCommerce & WooCommerce stores optimizing product pages and categories for more sales. Marketers & SEO agencies managing SEO across one site or hundreds of client sites. Local businesses that want to show up in local search and Google Maps. Developers who want REST API access, headless support, and granular SEO control. Multilingual SEO Running a multilingual website? AIOSEO is built for it. Generate a multilingual XML sitemap so Google indexes every language of your content, and keep your titles, meta descriptions, and schema correct across every translation. AIOSEO works with WPML, Weglot, and other multilingual plugins so each translated page is fully optimized for search. WordPress SEO Integrations Google Search Console — keywords, clicks, rankings, and index status inside your WordPress dashboard. WooCommerce SEO — optimize WooCommerce product pages and categories to rank in Google and convert. Social Media & Open Graph — Facebook, Twitter, and Pinterest previews, Open Graph data, and a Google Knowledge Panel from your profiles. Webmaster Tools — Google Search Console, Bing, Yandex, Baidu, Google Analytics, and Pinterest verification. Google AMP SEO — better mobile SEO for your AMP pages. Semrush — pull additional SEO keyword data into AIOSEO. SEOBoost Writing Assistant — content briefs and recommendations to help you outrank competitors. Microsoft Clarity — heatmaps and session recordings of visitor behavior. IndexNow — instantly notify Bing and Yandex for faster indexing. Page Builder SEO — Elementor, Bricks, Oxygen, Divi, Avada, WP Bakery, SeedProd, and SiteOrigin. Block & Classic Editor — full SEO controls in the Gutenberg block editor and the Classic Editor metabox. ACF & Custom Fields — pull Advanced Custom Fields content into your SEO analysis, smart tags, and schema. Switch from Yoast, Rank Math or SEOPress in Minutes Moving from another SEO plugin? Users switch to AIOSEO for its built-in AI SEO tools, easy setup wizard, and features like the Redirection Manager, Link Assistant, and keyword rank tracking. Our point-and-click importer brings your titles, meta descriptions, and settings over intact, so you can switch in minutes. It imports from: Yoast SEO & Yoast SEO Premium Rank Math (RankMath) SEOPress It also imports redirects from the Redirection, Simple 301 Redirects, Safe Redirect Manager, and 301 Redirects plugins, and lets you import/export AIOSEO settings, create a backup, and bulk-import pages to your XML sitemap via CSV. Full All in One SEO Feature List SEO Setup Wizard – configure your WordPress SEO settings in under 5 minutes. TruSEO On-Page Analysis – real-time content analysis and readability scoring for unlimited focus keywords. AI Content Generator – generate SEO titles, meta descriptions, FAQs, and full articles with AI content tools. AI Image Generator – create optimized images for your posts on demand. Smart Schema Markup – add schema markup and rich snippets (FAQ, product, recipe, and more) without code. Headline Analyzer – the Headline Analyzer scores your post headlines to improve CTR and SEO rankings. Keyword Rank Tracker – track Google keyword rankings and import keywords from Google Search Console. Local SEO – local business schema, multiple locations, opening hours, and Google Maps for local SEO. Smart XML Sitemap – advanced XML sitemap with Video sitemap, News sitemap, RSS sitemap, and HTML sitemap. Link Assistant – automatic internal linking suggestions to improve on-page SEO. Redirection Manager – manage redirects, fix 404 errors, and set up 301 redirect rules or full-site redirects. Smart Breadcrumbs – breadcrumb navigation with full JSON-LD breadcrumb schema for better SEO. Robots.txt Editor – edit your robots.txt file and per-page robots meta tags from WordPress. SEO Canonical URLs – automatic canonical URLs and per-post canonical tags to prevent duplicate content. Image SEO – automatic image alt text, image titles, and clean SEO filenames. Author SEO (E-E-A-T) – author profile pages, bio boxes, and author schema to strengthen E-E-A-T. SEO Revisions – track your SEO changes over time and roll back in one click. Site Audit Checklist – full site audit and SEO audit with prioritized, actionable fixes. Open Graph & Social – Open Graph data and social previews for Facebook, Twitter, and Pinterest. WooCommerce SEO – optimize WooCommerce product pages and categories for eCommerce SEO. Google Search Console – see Google Search Console keywords, clicks, and index status in your dashboard. Elementor SEO – Elementor SEO controls and TruSEO analysis inside the Elementor page builder. Gutenberg & Classic Editor – full SEO controls in the Gutenberg block editor and the Classic Editor. ACF & Custom Fields – pull ACF and custom fields content into your SEO analysis, smart tags, and schema. WPML & Multilingual SEO – multilingual SEO with WPML support and a multilingual XML sitemap. llms.txt Generator – generate an llms.txt file for generative engine optimization in AI search. IndexNow – instantly notify Bing and Yandex for faster indexing. Table of Contents – automatic table of contents block with customizable headings. Now you can see why over 3 million website owners trust AIOSEO to grow their search traffic. Give AIOSEO a try. Want to unlock more SEO features? Upgrade to AIOSEO Pro. Credits This plugin is created by Benjamin Rojas and Syed Balkhi. Branding Guideline AIOSEO® is a registered trademark of Semper Plugins LLC. When writing about the WordPress SEO plugin by AIOSEO, please use the following format. AIOSEO (correct) All in One SEO (correct) AIO SEO (incorrect) All in 1 SEO (incorrect) AISEO (incorrect)

The most complete WordPress MCP server — 200+ tools, OAuth 2.0, WebMCP-ready, and nothing leaves your site. Royal MCP gives Claude, ChatGPT, Google Gemini, Perplexity, DeepSeek, Mistral, and every other MCP-compatible AI structured access to your WordPress site: 85 WordPress core tools plus 120 integration tools that auto-load for WooCommerce, Elementor, Divi, ACF, Yoast SEO, UpdraftPlus, WPForms, Solid Security, Contact Form 7, MonsterInsights, W3 Total Cache, Duplicator, BuddyPress, and more. Connect Claude to WordPress Royal MCP connects your WordPress site directly to Claude Code, Claude Desktop, or Claude.ai. Setup takes a minute or less: install the connector, authorize, and start your chat. Edit Elementor with Claude First-time setup walkthrough: royalplugins.com/support/royal-mcp/connecting-to-claude/ Plugins with dedicated MCP tools WooCommerce, Elementor, Divi, Advanced Custom Fields, Yoast SEO, UpdraftPlus, WPForms, Solid Security, Contact Form 7, MonsterInsights, W3 Total Cache, Duplicator, BuddyPress, Redirection — plus every Royal Plugin (Royal AI Firewall, GuardPress, SiteVault, ForgeCache, Royal Ledger, Royal Links). Not seeing yours? MCP still works. WordPress core operations (posts, pages, media, users, taxonomies, custom fields, menus, options) cover most day-to-day AI workflows for any plugin — read/write ACF via wp_get_post_meta even without ACF-specific tools, edit posts on any custom post type, moderate any plugin’s comments. Shared SEO meta tools automatically work with Rank Math, AIOSEO, SEOPress, and SEObolt. A dedicated integration layers specialized tools on top when that plugin exposes its own data model, request features/plugins support here on the wp.org support forum. Connect ChatGPT to WordPress ChatGPT on the web, desktop, and iOS supports MCP servers natively. Add Royal MCP in ChatGPT’s Plugins panel, authorize once, and ChatGPT can read your posts, publish drafts, update product prices, moderate comments, and audit SEO across your site — all through ordinary conversation. First-time setup walkthrough: royalplugins.com/support/royal-mcp/connecting-to-chatgpt/ Works with every MCP-compatible AI client Royal MCP is not vendor-locked. Claude/Anthropic, ChatGPT/OpenAI, Gemini/Google, Grok/xAI, Llama/Meta, Mistral, DeepSeek, Qwen/Alibaba, Cohere, and Perplexity all work through MCP-compatible clients like Cursor, Windsurf, Cline, Continue, Zed, JetBrains AI Assistant, OpenCode, Warp, Ollama, and LM Studio, all connecting through the same endpoint. Switch AI vendors without rewriting a single connection. Ready for browser-based AI agents (WebMCP) Royal MCP supports the W3C WebMCP browser-agent standard on the server side. When a visitor is signed into your site, browser-based AI agents from any WebMCP-compatible bridge (Cloudflare’s WebMCP is the first shipping today) can call the same MCP tools that Claude Desktop and ChatGPT already use, authenticated with the visitor’s existing WordPress login. Turn it on with one toggle in the Browser Agents section of the Royal MCP settings. External clients like Claude Desktop, ChatGPT, and Cursor continue to use OAuth Bearer tokens as before. How Royal MCP handles authorization Royal MCP speaks full OAuth 2.0 with PKCE and Dynamic Client Registration (RFC 7591) for Claude Desktop, Claude Code, ChatGPT web, and every modern MCP client. Sessions expire, refresh automatically, and can be revoked globally with one button in wp-admin. Clients that don’t speak OAuth get timing-safe API-key auth, per-IP rate limits (60 requests per minute), and the same activity log for every tool call. Where do my credentials go? Nowhere. Your AI client authenticates straight to your WordPress site, and every API key, OAuth token, session, and audit-log entry stays inside your own database. There’s no hosted server sitting between your chat and your site, and no license check or telemetry reaching out on activation. Ollama and LM Studio are first-class platforms alongside Claude, ChatGPT, and Gemini if you want to keep AI inference local too. Can I undo what the AI does? Yes. Every MCP client (Claude Desktop, ChatGPT, and the rest) asks you to approve or deny each destructive tool call by default, until you flip that setting in your connector. On top of that, Royal MCP captures a reverse-state snapshot before every destructive write and hands back a 72-hour undo token. One mcp_undo_last_operation call reverses the change — whether Claude deleted a post, replaced text on an Elementor page, updated a WooCommerce product, or reordered menu items. New posts and pages start as drafts, so nothing the AI writes appears on your live site until you approve publishing. Every tool call also lands in an activity log you can review from wp-admin. Does Royal MCP work with the WordPress Abilities API? Yes. Royal MCP surfaces every AI-callable operation through one endpoint, from three sources: the 85 native tools Royal MCP ships, the 120 integration tools that auto-load when WooCommerce, Elementor, Divi, ACF, Yoast SEO, UpdraftPlus, WPForms, Solid Security, Contact Form 7, MonsterInsights, W3 Total Cache, Duplicator, BuddyPress, and other supported plugins activate, and every ability any plugin registers through WordPress 6.9’s Abilities API. Your AI sees them all as MCP tools — one connector, no per-plugin setup, no per-vendor rewrite. See what AI agents do to your site The free Royal AI Firewall companion shows every AI agent hitting your site at the HTTP layer (training crawlers, retrieval bots, AI search engines), not just the ones connected through Royal MCP. Install both for a unified view across MCP tool calls and HTTP-layer bot hits. Discoverable by every AI agent scanner (Agent Readiness) Royal MCP publishes machine-readable MCP Server Card, Skills Index, and OAuth Protected Resource metadata at the standard well-known locations. Cloudflare’s Agent Readiness scanner, Vercel’s is-agentic, and Chrome Lighthouse’s Agentic Browsing audit all recognize your site as agent-ready with zero configuration. Every request to your MCP endpoint carries a Link header pointing agent runtimes at these discovery documents. 85 Core Tools + 120 Integration Tools WordPress Core (85 tools): Posts – create, read, update, delete, search, count (any registered public post type, featured images supported) Pages – full CRUD with parent page support Post Types – discover all registered public post types on the site Post Revisions – list revision history and roll a post back to any prior version Media – browse, upload from URL or base64, update alt text/caption/title/description, set as featured image, delete Comments – create, read, delete; full moderation suite (list pending, approve, mark spam, trash) Users – display names and roles (emails and usernames are not exposed) Categories, Tags & Custom Taxonomies – full CRUD, assign, count, discover registered taxonomies Term Meta – read/update/delete (most useful for term-level SEO fields on categories and tags) Menus – create menus, list, and full CRUD + reorder on menu items Publish and Promote – publish a draft and insert into a menu in one call Preview Links – generate a shareable draft-preview URL without a WP login Post Meta – read/update/delete custom fields (works with ACF, MetaBox, JetEngine, Pods, CPT UI) SEO Meta – read/write Yoast, Rank Math, AIOSEO, or SEObolt title/description/focus keyword/robots/OG (auto-detects active plugin) SEO Audit – fetch a post’s rendered HTML and report title, meta description, canonical, viewport, OG, Twitter Card Widgets – list, list sidebars, update content (writes gated by theme-appearance admin toggle) Find and Replace – literal replace with dry-run preview, expected-count safety, read-after-write verification Undo – reverse the previous delete or reorder within 72 hours via mcp_undo_last_operation Site Info + Site Status – name, WP/PHP versions, active theme + plugins, cron activity — for AI-driven pre-write validation Error Log + Cron Schedule – read recent PHP errors and scheduled WP cron events Connection Health – MCP session diagnostic (route, auth method, session ID, plugin version) Plugins & Themes – list installed with active status Theme Appearance – get theme, read/write theme mods (gated), read/write Custom CSS Search + Permalink Structure – full-text content search; read/write permalinks (gated) Options – read allowlisted core options, read plugin settings (sensitive keys redacted), write to allowlisted options when enabled Third-Party Plugin Integrations (auto-detected) If the plugin is active on your WordPress site, it’s tools auto-register with no additional configuration needed. WooCommerce (29 tools) — full store CRUD: products (simple + variable), variations, global attributes (pa_*), coupons with bulk-trash purge, orders + notes, customers, and store statistics Elementor (11 tools, free + Pro) — clone a page with fresh element IDs, bulk text/image replacement across 12+ widget types, compact page outlines, widget-level settings reads, template library import/insert, post_content restoration on damaged pages (72-hour undo per write) Divi (9 tools, Divi 4 + Divi 5) — format detection, page outlines, layout validation, library reads, dry-run find-and-replace with active-editor-session detection, page cloning (D5 clientIds regenerated), image swaps, library-to-page apply in merge or replace mode (72-hour undo per write) Advanced Custom Fields (4 tools, free + Pro) — type-aware field reads (each field’s Return Format respected: hydrated post objects, parsed repeater rows, image arrays), bulk-read all fields on a post, type-aware writes, field-group enumeration Yoast SEO (5 tools) — read/write Yoast meta (raw + resolved), capture the JSON-LD schema graph, list indexed internal links, list Yoast Premium redirects UpdraftPlus (4 tools) — list backups, read status, trigger async backups with per-entity filtering (DB, plugins, themes, uploads), read the backup schedule WPForms (4 tools, free + Pro) — list forms, read a form’s field schema; submission access (list + read) requires WPForms Pro Solid Security (4 tools) — read the security dashboard, list currently locked-out IPs, read the security event log, add an IP to the ban list (also detects iThemes Security and Kadence Security Basic) Contact Form 7 (3 tools) — list forms, read a single form’s parsed field schema; submission access requires the Flamingo companion plugin MonsterInsights (4 tools) — read the analytics overview, top pages, traffic sources, and top Search Console queries W3 Total Cache (3 tools) — read cache config across every module, purge (all / by URL / by post), read cache usage stats Duplicator (3 tools) — list migration packages, read per-package status, get the installer URL for any completed package BuddyPress (4 tools) — list community members, read a single member profile, list groups, read the activity feed Redirection (4 tools) — list/create/update 301/302/307 redirects (with regex + group + status), list redirect groups Royal Plugins Integrations (auto-detected) Every Royal Plugin auto-exposes MCP tools alongside Royal MCP: Royal AI Firewall (6 tools) — review AI bot traffic, dashboard stats, and set allow/block/challenge policies per bot signature GuardPress (7 tools) — review your security score, run vulnerability scans, inspect failed logins and blocked IPs SiteVault (6 tools) — list backups, trigger new ones, check progress, review schedules ForgeCache (3 tools) — purge and inspect your page cache Royal Ledger (4 tools) — review recurring software costs and masked license entries Royal Links (3 tools) — manage branded short links and click stats Supported AI Platforms Claude (Anthropic) – Full MCP support via Claude Desktop, Claude Code, and VS Code OpenAI / ChatGPT – GPT-5.5, GPT-5, GPT-5 Mini, o3 Google Gemini – Gemini 3.5 Flash, 3.1 Flash-Lite Groq – Llama 3.3, Llama 3.1, GPT-OSS Azure OpenAI – Azure-hosted OpenAI deployments AWS Bedrock – Claude, Llama, Titan models Ollama / LM Studio – Local self-hosted models (no external data transmission) Custom MCP Servers – Connect to any MCP-compatible endpoint Compatible Clients & Frameworks Royal MCP works with any MCP-compliant client, IDE, or AI agent framework — no per-tool configuration required. Each entry below describes the specific integration path Royal MCP provides for that target, so customers can answer “will this work with the tool I already use?”: Desktop AI apps – Claude Desktop (native MCP connector via OAuth 2.0), ChatGPT Desktop, Gemini Advanced. AI code IDEs – Claude Code, VS Code (with MCP extension), Cursor, Windsurf, Continue, Cline, Zed, JetBrains AI Assistant. API testing tools – Postman, Bruno, Insomnia (use the API key in the X-Royal-MCP-API-Key header). Custom field plugins – Advanced Custom Fields (ACF) has dedicated acf_* tools that return values formatted per each field’s Return Format setting (the same way the ACF UI shows them). MetaBox, JetEngine, Pods, CPT UI, and Custom Field Suite are supported through the wp_get_post_meta / wp_update_post_meta tools, so AI agents can populate custom fields just like a human editor. Page builders – Elementor and Divi have dedicated tools for safe clone-and-customize workflows (Elementor: clone a page, find/replace text, swap images, get an outline, import templates; Divi: format detection, layout validation, page outline, library read, find/replace with builder-format awareness) – see the Tools list. Widget-level creation from scratch is intentionally out of scope. Beaver Builder, Bricks, Gutenberg, Spectra, and Stackable store standard post content that is readable and writable by AI; page-builder-specific JSON storage is opaque unless covered by a dedicated tool. Multilingual – WPML, Polylang, TranslatePress: translated posts appear as separate posts and can be read/written via the standard post tools. AI agent frameworks – Any MCP-compatible framework (LangChain, AutoGen, CrewAI, LlamaIndex, Haystack, etc.). MCP Spec Compliance Royal MCP implements the MCP Streamable HTTP transport across every published spec revision — 2024-11-05, 2025-06-18, 2025-11-25, and 2026-07-28 — negotiated on the initialize handshake so every client gets the wire behavior it expects: Single /mcp endpoint for all JSON-RPC communication POST for client messages, GET for server-sent events, DELETE for session termination Stateless per-request transport — sessions still supported for backwards compatibility but not required Cryptographically secure session IDs with transient-based storage when clients do use them Origin header validation to prevent DNS rebinding attacks Proper CORS handling for browser-based MCP clients W3C WebMCP browser-agent standard supported on the server side Machine-readable Agent Readiness signals published at the standard well-known paths RFC 8288 Link headers on every MCP response pointing agent runtimes at the discovery documents External Services Royal MCP makes no outbound calls of its own — no telemetry, no license check, no update ping. The MCP protocol is inbound: your AI client authenticates and calls your site, and any data the AI sees is sent under whatever terms you’ve agreed to with that AI provider.