generated: '2026-07-19'
method: searched
source: openapi/holvi-psd2-openapi.yml
docs: https://holvi.github.io/psd2-api/authentication.html
summary:
  types:
  - apiKey
  - http
  api_key_in:
  - header
  model: >-
    Two-party authentication. The TPP proves itself with an eIDAS QSEAL client certificate,
    a Holvi Client-Id/Client-Secret pair, and a per-request HTTP message signature (Draft
    Cavage HTTP Signatures v10, RSA-SHA256, key >= 2048-bit) over (request-target), Host,
    Date and, for write methods, Content-Type and Digest (RFC 3230 SHA-256). The end user
    (PSU) grants consent via a redirect login at https://psd2.holvi.com/login/ and the
    returned authorization code is exchanged for a JWT bearer access token used in the
    Authorization header. Onboarding endpoints are exempt from the signature requirement.
schemes:
- name: HolviClientId
  type: apiKey
  in: header
  parameter: X-Holvi-Client-Id
  description: Client ID identifying the TPP application (from approved onboarding).
  sources:
  - openapi/holvi-psd2-openapi.yml
- name: HolviClientSecret
  type: apiKey
  in: header
  parameter: X-Holvi-Client-Secret
  description: Client Secret authenticating the TPP (from approved onboarding).
  sources:
  - openapi/holvi-psd2-openapi.yml
- name: HolviSignatureHeader
  type: apiKey
  in: header
  parameter: Signature
  description: Application-level HTTP message signature (Draft Cavage HTTP Signatures v10, RSA-SHA256,
    key >= 2048-bit) over (request-target), Host, Date [, Content-Type, Digest for write methods],
    keyId = Client-Id, using the eIDAS QSEAL certificate.
  sources:
  - openapi/holvi-psd2-openapi.yml
- name: HolviBearer
  type: http
  scheme: bearer
  bearerFormat: JWT
  description: PSU consent JWT access token from the consent token exchange.
  sources:
  - openapi/holvi-psd2-openapi.yml