Ecosystem references

Curated link set to the broader AI agent capability ecosystem APAI sits within. Use this as the starting point when researching adjacent platforms, protocols, and standards.

These are external links to other projects, vendors, and standards bodies. APAI does not endorse, verify, or maintain these resources. Use them as starting points for research, then cross-check against the primary source. Last curated: 2026-05-14.

Model Context Protocol (MCP)

Official MCP sitehttps://modelcontextprotocol.io/
Official MCP Registryhttps://registry.modelcontextprotocol.io/
Reference MCP servers (Everything, Fetch, Filesystem, Git, Memory, Sequential Thinking, Time)https://github.com/modelcontextprotocol/servers
MCP Registry: Supported package typeshttps://modelcontextprotocol.io/registry/package-types
Introducing the MCP Registry (Sep 2025 launch blog)https://blog.modelcontextprotocol.io/posts/2025-09-08-mcp-registry-preview/

OpenAI / ChatGPT

ChatGPT Apps SDKhttps://developers.openai.com/apps-sdk
Apps SDK: MCP server conceptshttps://developers.openai.com/apps-sdk/concepts/mcp-server
Build with the Apps SDKhttps://help.openai.com/en/articles/12515353-build-with-the-apps-sdk
Developers can now submit apps to ChatGPThttps://openai.com/index/developers-can-now-submit-apps-to-chatgpt/
Apps SDK example appshttps://github.com/openai/openai-apps-sdk-examples

Anthropic / Claude

Claude Connectors directoryhttps://claude.com/connectors
Claude MCP connector docshttps://platform.claude.com/docs/en/agents-and-tools/mcp-connector
Get started with custom remote-MCP connectorshttps://support.claude.com/en/articles/11175166-get-started-with-custom-connectors-using-remote-mcp
Remote MCP server referencehttps://platform.claude.com/docs/en/agents-and-tools/remote-mcp-servers
Claude Code Plugins / Marketplaces (third-party)https://claudemarketplaces.com/

Google / Gemini

Gemini CLI Extensions marketplacehttps://geminicli.com/extensions/
Gemini CLI extensions docshttps://google-gemini.github.io/gemini-cli/docs/extensions/
Getting started with Gemini CLI extensions (codelab)https://codelabs.developers.google.com/getting-started-gemini-cli-extensions
Gemini CLI extensions org on GitHubhttps://github.com/gemini-cli-extensions

xAI / Grok

xAI Grok connectors docshttps://docs.x.ai/grok/connectors
xAI remote MCP toolshttps://docs.x.ai/developers/tools/remote-mcp

GitHub agent skills

About agent skillshttps://docs.github.com/en/copilot/concepts/agents/about-agent-skills
gh skill CLI manualhttps://cli.github.com/manual/gh_skill
Manage agent skills with GitHub CLI (changelog)https://github.blog/changelog/2026-04-16-manage-agent-skills-with-github-cli/
Agent Skills open formathttps://github.com/agentskills

Microsoft APM (Agent Package Manager)

Microsoft APM docshttps://microsoft.github.io/apm/
Microsoft APM repohttps://github.com/microsoft/apm

llms.txt and discovery standards

llms.txt standardhttps://llmstxt.org/

Security and supply-chain

NCSC: prompt injection secure design guidancehttps://www.ncsc.gov.uk/blog-post/prompt-injection-is-not-sql-injection
SLSA: Supply-chain Levels for Software Artifactshttps://slsa.dev/

Stack references

Next.js App Router docshttps://nextjs.org/docs/app
Cloudflare Workershttps://developers.cloudflare.com/workers/
Cloudflare Pages Functionshttps://developers.cloudflare.com/pages/functions/