Agents SDK

MCP Registry

179 remote MCP servers available out of the box. Paste a URL into mcpServers on an agent, or pick one when adding a credential to a workspace vault. The list mirrors Anthropic's MCP picker and is updated periodically.

179 / 179

Don't see what you need?

Any MCP server that speaks the remote HTTP protocol works — just drop the URL into mcpServers on your agent config, or hit the Custom Server option in the Add Credential dialog.

MCP Registry - 21st Agents SDK Docs