aid: tvarka.pro:atk-api-catalog
name: Tvarka ATK API
description: Public developer catalog for Lithuanian eID authentication, qualified electronic signing,
  validation, timestamp and archive services.
image: https://tvarka.pro/static/img/tvarka-logo.svg
url: https://atk.tvarka.pro/apis.json
created: '2026-07-10'
modified: '2026-08-03'
specificationVersion: '0.19'
type: Index
position: Producing
access: 3rd-Party
tags:
- Authentication
- Digital Signature
- eIDAS
- Lithuania
- OpenAPI
- QES
apis:
- aid: tvarka.pro:atk
  name: Tvarka ATK API
  description: One REST API for Lithuanian identity-card authentication and qualified electronic signatures
    through physical-reader or NFC ceremonies, with optional Smart-ID and Mobile-ID methods plus validation
    and long-term trust services.
  image: https://tvarka.pro/static/img/tvarka-logo.svg
  created: '2026-07-10'
  modified: '2026-08-03'
  baseURL: https://atk.tvarka.pro/v1
  humanURL: https://atk.tvarka.pro/docs/
  tags:
  - Authentication
  - Digital Signature
  - eIDAS
  - Lithuania
  - OpenAPI
  - QES
  properties:
  - type: OpenAPI
    url: https://atk.tvarka.pro/openapi.json
    mediaType: application/vnd.oai.openapi+json;version=3.1
  - type: Documentation
    url: https://atk.tvarka.pro/docs/api/
  - type: GettingStarted
    url: https://atk.tvarka.pro/docs/quickstart/
  - type: Authentication
    url: https://atk.tvarka.pro/docs/quickstart/
  - type: Signup
    url: https://atk.tvarka.pro/docs/access/
  - type: SDKs
    url: https://atk.tvarka.pro/docs/sdks/
  - type: PostmanCollection
    name: Authentication collection
    url: https://atk.tvarka.pro/postman/auth.json
  - type: PostmanCollection
    name: Signing collection
    url: https://atk.tvarka.pro/postman/sign.json
  - type: Pricing
    url: https://atk.tvarka.pro/docs/pricing/
  - type: ChangeLog
    url: https://atk.tvarka.pro/docs/lifecycle/
  - type: StatusPage
    url: https://atk.tvarka.pro/status/
  - type: X-IncidentFeed
    url: https://atk.tvarka.pro/status/feed.xml
    mediaType: application/atom+xml
  - type: ErrorCodes
    url: https://atk.tvarka.pro/docs/api/
  - type: Webhooks
    url: https://atk.tvarka.pro/docs/api/
  contact:
  - FN: Tvarka API team
    email: info@tvarka.pro
    organizationName: Tvarka
    url: https://atk.tvarka.pro/docs/access/
common:
- type: TermsOfService
  url: https://tvarka.pro/salygos/
- type: PrivacyPolicy
  url: https://tvarka.pro/privatumas/
- type: Support
  url: https://tvarka.pro/kontaktai/
- type: StatusPage
  url: https://atk.tvarka.pro/status/
maintainers:
- FN: Tvarka API team
  email: info@tvarka.pro
  organizationName: Tvarka
  url: https://atk.tvarka.pro/docs/
