# Tvarka ATK API

**Canonical:** https://apis.io/providers/tvarka-atk-api/  
**Website:** https://atk.tvarka.pro/docs/  
**APIs profiled:** 9

A single REST API for Lithuanian eID authentication and qualified electronic signing (QES), plus validation, timestamping and long-term-validation (LTV)/archive trust services. The primary ceremonies read the Lithuanian identity card (ATK) through a physical smart-card reader or an NFC phone tap, with Smart-ID and Mobile-ID as optional server-side methods under the same request, polling, webhook and metering model. Signing produces PAdES, ASiC-E, ADOC or detached CAdES artifacts with a qualified timestamp and an advisory validation axis. eIDAS-aligned and EU-resident, operated from Lithuania by Advokato M. Kiskio kontora INVENT and Socialiniai algoritmai, UAB, and priced per successful operation with no subscription or minimum.

## Kin Score — 64.7 / 100 (strong)

Scored 2026-08-12 under rubric 0.11.0. Trend: flat (+0.0 from 64.7).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 61.7 |
| Governance | 20.8 |
| Operational Transparency | 57.9 |
| Developer Ergonomics | 71.2 |
| Commercial Clarity | 84.2 |

## Agent readiness — 53.8 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | derived |
| Auth Clarity | yes |
| Idempotency | documented |
| Error Semantics | documented |
| OpenAPI Examples | partial |
| Rate Limit Signal | verified |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (9)

- **Tvarka ATK API Auth API** — The eID authentication ceremony (`/v1/auth/*`).
- **Tvarka ATK API Erasure API** — The Erasure API from Tvarka ATK API — 3 operation(s) for erasure.
- **Tvarka ATK API LTV API** — Post-signature timestamp and long-term-validation upgrades.
- **Tvarka ATK API Pairing API** — NFC remote pairing - complete a request by tapping a card on a different device.
- **Tvarka ATK API Sign API** — The QES signing ceremony (`/v1/sign/*`).
- **Tvarka ATK API Tvarka ATK API API** — The Tvarka ATK API API from Tvarka ATK API — 0 operation(s) for tvarka atk api.
- **Tvarka ATK API Tvarka ATK QES Signing API (paid Tier Addendum) API** — The Tvarka ATK QES Signing API (paid Tier Addendum) API from Tvarka ATK API — 0 operation(s) for tvarka atk qes signing api (paid tier addendum).
- **Tvarka ATK API Validation API** — Standalone advisory validation of signed artifacts.
- **Tvarka ATK API Well Known API** — Keys for verifying the optional `assertion` JWT.

## MCP servers (1)

- **tvarka-atk-api-mcp.yml**

## Agentic access (1)

- **Tvarka Atk Api Agentic Access** — 22 operations · 15 acting

## Security (3)

- **Tvarka Atk Api Authentication** — http/apiKey · 3 schemes
- **Tvarka Atk Api Domain Security** — TLSv1.3 · HSTS · DMARC
- **Tvarka Atk Api Vulnerability Disclosure** — Hackerone · security.txt · contact published

## Plans (1)

- **Tvarka Atk Api Plans**

## Tags

Authentication, Digital Signature, eIDAS, QES, Lithuania, OpenAPI, eID, Smart-ID, Mobile-ID, NFC, Timestamping, LTV, Webhooks, Identity, Trust Services, GDPR

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/tvarka-atk-api/). Scores are computed from the provider's own public artifacts under a published rubric.