generated: '2026-07-17'
method: searched
source: https://21st.dev/magic/console + https://github.com/21st-dev/magic-mcp + https://github.com/21st-dev/claude-code-plugin
note: >-
  21st has no public REST OpenAPI; authentication is documented across the Magic console,
  the Magic MCP server and the remote hosted MCP. A single API key minted in the console
  authenticates the CLI, the local stdio MCP server and the remote HTTP MCP server. The
  remote server transmits the key as the x-api-key request header; the local server and CLI
  read it from the API_KEY_21ST environment variable / --api-key flag.
summary:
  types: [apiKey]
  api_key_in: [header]
  header_name: x-api-key
  env_var: API_KEY_21ST
  oauth2_flows: []
schemes:
- name: apiKey
  type: apiKey
  in: header
  parameter_name: x-api-key
  provisioning: https://21st.dev/magic/console
  used_by:
  - "@21st-dev/cli (--api-key flag)"
  - "@21st-dev/magic local MCP server (API_KEY_21ST)"
  - remote MCP server https://21st.dev/api/mcp (x-api-key header)