# Tvarka ATK API

**Canonical:** https://apis.io/providers/tvarka/  
**Website:** https://atk.tvarka.pro/docs/  
**APIs profiled:** 4

A single REST API estate for Lithuanian eID authentication and qualified electronic signing (QES). The ATK API reads the Lithuanian identity card itself - physical smart-card reader or NFC phone tap - through one request, polling, webhook and metering model, and adds standalone validation, timestamping and long-term-validation (LTV)/archive trust services; contract 1.4.0 withdrew the short-lived Smart-ID and Mobile-ID passthrough, so the ATK surface is deliberately card-only. Hosted remote-method ceremonies moved to the separate Tvarka Sign API (sign-api.tvarka.pro), an orchestration contract with RFC 9457 problem details and a live, anonymously introspectable MCP server at /mcp. 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 — 66.3 / 100 (strong)

Scored 2026-09-01 under rubric 0.17.2. Trend: flat (+0.0 from 66.3).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 61.6 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 57.9 |
| Developer Ergonomics | 81.0 |
| Commercial Clarity | 84.2 |
| Access Clarity | 84.2 |

## Agent readiness — 50.6 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | yes |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | documented |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | verified |
| Event Surface Described | yes |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (10)

- **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.
- **Tvarka Sign API** — Machine channel for Tvarka Sign: post a document and a list of signers and Tvarka runs its ordinary qualified signing ceremony for each of them on the hosted page or in the Tvar...

## MCP servers (1)

- **Tvarka Sign**

## Agentic access (1)

- **Tvarka Agentic Access** — 44 operations · 31 acting · 15 human-in-the-loop

## Security (4)

- **Tvarka Atk Api Authentication** — http/apiKey · 3 schemes
- **Tvarka Sign Api Authentication** — http · 1 scheme
- **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, Webhook, 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/). Scores are computed from the provider's own public artifacts under a published rubric.