Kizik Authentication

generated: '2026-08-23'
method: probed
source: https://kizik.com/.well-known/openid-configuration + probed https://kizik.com/api/ucp/mcp
docs: https://kizik.com/agents.md
description: >-
  Kizik exposes two distinct authentication postures: the agent commerce surface is anonymous at
  discovery time, and customer identity is OpenID Connect.
schemes:
- id: none
  type: none
  surface: https://kizik.com/api/ucp/mcp
  description: >-
    MCP tools/list is served anonymously. Probed 2026-08-23: HTTP 200, no WWW-Authenticate header, no
    OAuth challenge, no API key required to enumerate the 13 tools and their input schemas.
  evidence:
    url: https://kizik.com/api/ucp/mcp
    http_status: 200
- id: ucp-agent-profile
  type: caller-identity
  surface: https://kizik.com/api/ucp/mcp
  description: >-
    Every tool invocation requires meta.ucp-agent.profile — a URI pointing at the calling agent's own
    published UCP agent profile. This is caller identification rather than authorization: the agent
    asserts who it is by publishing a resolvable profile document. Omitting it returns JSON-RPC error
    -32001 with data.code invalid_profile_url.
  required: true
  evidence:
    probe: 'tools/call search_catalog with empty arguments'
    response: '{"code":-32001,"message":"UCP discovery failed","data":{"code":"invalid_profile_url"}}'
- id: openid-connect
  type: openIdConnect
  surface: customer accounts
  description: >-
    Shopify customer accounts for the Kizik store, discoverable at /.well-known/openid-configuration on
    kizik.com. Authorization code flow with PKCE (S256), refresh tokens, and a JWT bearer grant.
  issuer: https://shopify.com/authentication/22811461
  openid_configuration: https://kizik.com/.well-known/openid-configuration
  authorization_endpoint: https://shopify.com/authentication/22811461/oauth/authorize
  token_endpoint: https://shopify.com/authentication/22811461/oauth/token
  end_session_endpoint: https://shopify.com/authentication/22811461/logout
  jwks_uri: https://shopify.com/authentication/22811461/.well-known/jwks.json
  grant_types:
  - authorization_code
  - refresh_token
  - urn:ietf:params:oauth:grant-type:jwt-bearer
  response_types: [code]
  code_challenge_methods: [S256]
  token_endpoint_auth_methods:
  - client_secret_basic
  - client_secret_post
  id_token_signing_alg: [RS256]
  claims: [iss, sub, aud, exp, iat, nonce, sid, email, email_verified]
  scopes_artifact: scopes/kizik-scopes.yml
- id: read-only-storefront
  type: none
  surface: https://kizik.com/products.json
  description: Product JSON documents are served without credentials.
payment_authorization:
  human_in_the_loop: required
  note: >-
    Payment completion is not an authentication scheme Kizik grants to agents at all. Both robots.txt and
    /agents.md require an explicit, contemporaneous human approval step before any checkout completes.
notes:
- No API keys, no bearer tokens and no mutual TLS are used on the public agent surface.
- The OIDC issuer is a Shopify-operated host, but the discovery document is served from kizik.com and is
  scoped to Kizik's shop (22811461); it authenticates Kizik customers, not Shopify staff.