Sharethis Authentication

generated: '2026-08-27'
method: searched
source: >-
  openapi/sharethis-platform-api.json (securitySchemes), https://sharethis.com/platform-api/,
  https://mcp.sharethis.com/ and the live OAuth metadata at
  https://mcp.sharethis.com/.well-known/oauth-authorization-server (probed 2026-08-27)
summary:
  types:
  - http
  - oauth2
  note: >-
    ShareThis runs TWO different auth models across one product. The REST Platform API uses a
    bearer JWT minted by its own login endpoint; the MCP server uses OAuth 2.1 authorization-code
    with PKCE. They are not interchangeable — a Platform API token will not authorize an MCP call.
schemes:
- name: BearerToken
  surface: ShareThis Platform API
  type: http
  scheme: bearer
  bearerFormat: JWT
  obtain_via: 'POST https://platform-api.sharethis.com/v2.0/auth/login'
  credential_input: ShareThis account credentials
  applied_to: >-
    All operations except POST /auth/login (13 of 14). Security is declared per-operation rather
    than by a global security requirement.
  scopes: none
  expiry: not documented
  refresh: >-
    No refresh-token flow is documented for this surface; the contract exposes only the login
    exchange.
  sources:
  - openapi/sharethis-platform-api.json
- name: OAuth2 (MCP)
  surface: ShareThis MCP Server
  type: oauth2
  spec: OAuth 2.1 with RFC 8414 authorization-server metadata and RFC 9728 protected-resource metadata
  issuer: https://mcp.sharethis.com
  authorization_endpoint: https://mcp.sharethis.com/oauth/authorize
  token_endpoint: https://mcp.sharethis.com/oauth/token
  grant_types:
  - authorization_code
  - client_credentials
  response_types:
  - code
  pkce:
    required_methods:
    - S256
  token_endpoint_auth_methods:
  - none
  - client_secret_basic
  scopes:
  - name: mcp:tools
    description: >-
      Invoke MCP tools on the ShareThis MCP server. The only scope the authorization server
      advertises.
  resource: https://mcp.sharethis.com
  authorization_servers:
  - https://mcp.sharethis.com
  discovery_documents:
  - path: /.well-known/oauth-protected-resource
    file: well-known/sharethis-mcp-oauth-protected-resource.json
  - path: /.well-known/oauth-authorization-server
    file: well-known/sharethis-mcp-oauth-authorization-server.json
  - path: /.well-known/openid-configuration
    file: well-known/sharethis-mcp-openid-configuration.json
  prerequisite: >-
    A ShareThis account must exist at https://platform.sharethis.com before OAuth linking succeeds.
  sources:
  - https://mcp.sharethis.com/.well-known/oauth-authorization-server
  - https://mcp.sharethis.com/
- name: OAuth client management
  surface: ShareThis Platform API
  type: provisioning
  note: >-
    The Platform API also exposes POST/GET /oauth-clients and DELETE /oauth-clients/{client_id},
    letting an account mint and revoke its own OAuth clients. Client creation is quota-limited
    (403 OAUTH_CLIENT_LIMIT_EXCEEDED); the numeric limit is not published.
unauthenticated_surface:
- api: ShareThis Social Share Count API
  base_url: https://count-server.sharethis.com/v2.0
  auth: none
  verified: >-
    Live GET of /get_counts?url=https://www.sharethis.com returned HTTP 200 with a full counts
    payload and no credential of any kind (probed 2026-08-27).
  note: >-
    Genuinely open. This is the surface an agent can call today with zero onboarding, and the only
    ShareThis API that needs no account.
- surface: MCP tools/list discovery
  auth: none
  note: >-
    tools/list on https://mcp.sharethis.com responds anonymously with complete input and output
    schemas. Discovery is open; invocation is not.
openid_connect:
  present: false
  note: >-
    An /.well-known/openid-configuration document IS served on mcp.sharethis.com, but it is an
    OAuth authorization-server document wearing the OIDC filename — it advertises no id_token,
    no userinfo_endpoint, no jwks_uri and no OIDC response types. It should not be read as an
    OpenID Connect provider.
mutual_tls: false
api_keys: false