generated: '2026-08-27'
method: searched
source: openapi/opensanctions-api-openapi.yml
docs: https://www.opensanctions.org/docs/api/authentication/
note: >-
  DERIVE returned nothing: the published OpenAPI declares an EMPTY
  components.securitySchemes and no top-level `security` requirement, even though
  every data endpoint requires a key. This profile is therefore SEARCHED from the
  provider's own authentication docs and confirmed by a live unauthenticated probe.
  The missing securityScheme is the single largest contract-quality gap in this
  provider's spec and is captured as a recommendation in
  overlays/opensanctions-api-overlay.yaml.
summary:
  types: [apiKey]
  api_key_in: [header]
  oauth2_flows: []
  spec_declared: false
  docs_declared: true
schemes:
  - name: ApiKeyAuth
    type: apiKey
    in: header
    parameter_name: Authorization
    value_format: "ApiKey <key>"
    example_header: "Authorization: ApiKey xxxxxxxxxxxxxxxxxxxxxxxx"
    sources: [https://www.opensanctions.org/docs/api/authentication/]
    note: >-
      A custom scheme, not RFC 6750 Bearer: the Authorization header carries the
      literal prefix `ApiKey`, not `Bearer`. The yente-mcp MCP server is the one
      exception — it accepts `Authorization: Bearer <key>` from the MCP client and
      translates it before forwarding.
key_management:
  issue_url: https://www.opensanctions.org/api/
  account_url: https://www.opensanctions.org/account/
  env_var: OPENSANCTIONS_API_KEY
  trial: 30-day complimentary trial on registration with a business email address
  free_keys: >-
    Free keys are offered for public-interest work — journalism, civil society and
    academia — by contacting support.
  rotation_policy: not documented
unauthenticated_surface:
  - operation: healthz_healthz_get
    path: /healthz
    probed_status: 200
  - operation: catalog_catalog_get
    path: /catalog
    probed_status: 200
  - operation: readyz_readyz_get
    path: /readyz
    probed_status: not-probed
self_hosted:
  product: yente
  docs: https://www.opensanctions.org/docs/on-premise/
  note: >-
    A self-hosted yente instance needs no API key at all (the SDK's `base_url=`
    kwarg targets it with `api_key` unset). POST /updatez is the one write
    operation and is guarded separately, returning 403 "Authorization error."
x-evidence:
  fetched: '2026-08-27'
  probes:
    - url: https://www.opensanctions.org/docs/api/authentication/
      status: 200
    - url: https://api.opensanctions.org/search/default?q=test
      status: 401
      body: '{"detail":"No API key provided."}'
    - url: https://api.opensanctions.org/healthz
      status: 200