generated: '2026-08-29'
method: searched
source: https://github.com/stacklet/stacklet-admin#readme, https://github.com/stacklet/terraform-provider-stacklet#readme,
  https://github.com/stacklet/mcp-server/blob/main/stacklet/mcp/stacklet_auth.py
note: 'No OpenAPI exists to derive securitySchemes from; this profile is read from the
  provider''s own first-party clients, which are the published description of how the
  Platform GraphQL API is authenticated.'
api: Stacklet Platform API
endpoint: https://api.{instance}.stacklet.io/
schemes:
- id: sso
  type: oauth2
  flow: authorization_code
  description: 'Browser-based single sign-on, brokered by AWS Cognito against the
    customer''s identity provider. `stacklet-admin login` with no arguments opens a
    browser, completes the SSO flow, and writes the resulting access and identity tokens
    to ~/.stacklet/credentials and ~/.stacklet/id.'
  session_lifetime: 12 hours (as used by the MCP server)
  identity_provider: AWS Cognito user pool, per deployment
- id: password
  type: oauth2
  flow: password
  description: '`stacklet-admin login --username <user>` bypasses SSO and prompts for a
    password; `--password` is available but the docs call it out as less secure because
    it leaks through shell history and process listings.'
- id: api_key
  type: apiKey
  in: header
  header: Authorization
  scheme: Bearer
  env: STACKLET_API_KEY
  description: 'Non-interactive API key. The CLI reads it from STACKLET_API_KEY and skips
    the login step entirely; the Terraform provider takes it as the `api_key` argument or
    the same environment variable. The provider changelog records that the `Bearer` type
    was added to the Authorization header in 0.6.1 (2026-01-23).'
credential_sources:
  order:
  - Environment variables — STACKLET_ENDPOINT, STACKLET_ACCESS_TOKEN, STACKLET_IDENTITY_TOKEN
  - ~/.stacklet/config.json (the `api` key holds the endpoint)
  - ~/.stacklet/credentials (access token)
  - ~/.stacklet/id (identity token)
  note: The Terraform provider and the MCP server both fall back to the credentials
    written by the stacklet-admin CLI, so a single interactive login authenticates all
    three clients.
tokens:
- name: access_token
  header: Authorization
  scheme: Bearer
- name: identity_token
  note: Sent alongside the access token; carried in the credentials tuple used by every
    first-party client.
service_endpoints:
  pattern: 'The first `api.` label of the endpoint is replaced with the service name —
    api.<instance>.stacklet.io becomes docs.<instance>.stacklet.io for documentation.'
  source: stacklet/mcp/stacklet_auth.py StackletCredentials.service_endpoint
authorization:
  model: 'Stacklet users carry roles and role assignments (stacklet_role,
    stacklet_role_assignment, stacklet_sso_group in the Terraform provider); the MCP
    server documentation recommends creating a purpose-scoped user rather than reusing an
    operator account.'
  scopes_published: false
  note: No OAuth scope reference is published on any public Stacklet surface, so no
    scopes/ artifact is emitted.
gaps:
- No public authentication reference page — every detail here comes from first-party
  client repositories rather than a hosted docs site.
- No /.well-known/openid-configuration or /.well-known/oauth-authorization-server is
  served on any publicly resolvable Stacklet host (both 404 on stacklet.ai and
  stacklet.io); the Cognito discovery document lives inside each customer deployment.