Build with Tvarka

Choose the interface for your workflow. Each product has its own credentials and billing unit. These technical guides are in English.

Sign API

Send documents for qualified signing, track each signer and collect the signed originals. REST and MCP support hosted signing; headless REST lets your application display the verification code.

Host: sign-api.tvarka.pro
Access: workspace API keys (tsk_test_ / tsk_live_), or OAuth for supported MCP clients. Open Sign settings → API keys. Headless production access needs a workspace entitlement.

Price: per successful qualified signature. At 1–99/month: remote €0.19, card/USB €0.13, plus VAT; timestamp included. Volume discounts apply. The separate web e-signature workflow charges per completed external document.

Guide, prices and quickstart · OpenAPI · n8n integration

Due Diligence API

Read Lithuanian company profiles, participants, beneficial owners, property and court information, or request a combined report. Identification packages connect a company role to the person signing.

Host: api.tvarka.pro
Access: dedicated ddk_test_ / ddk_live_ keys for REST and MCP. Request a sandbox key at [email protected]. Production requires accepted terms, a signed engagement agreement and a billable linked entity.

Price: per answered data call, with optional signed-response and interpretation tiers; identification packages are charged on delivery. Synthetic sandbox calls are free. The guide lists each product's current price.

Guide, prices and examples · OpenAPI · Identification sandbox

Tvarka ID

Let people sign in to your application with their eID through OpenID Connect.

Issuer: https://id.tvarka.pro
Access: a registered OIDC client, exact redirect URIs and PKCE S256. Request client registration through Tvarka; the client uses its registered authentication method, rather than a Sign or Due Diligence key.

Price: per successful login: Smart-ID/Mobile-ID €0.12, card €0.08, plus VAT. Failed or cancelled logins are free.

Product and registration contact · OIDC discovery · Integrator guide

ATK card-native API

Build an application that drives a Lithuanian identity card through NFC or a reader, with card authentication and signing services.

Host: atk.tvarka.pro
Access: register an ATK client through its developer portal. Use that product's client credentials and card-driving integration. Its SDKs belong to ATK.

Price: per successful card-native operation under the ATK tariff. Its pricing and onboarding are documented in the ATK portal; hosted remote signing uses the Sign tariff above.

Developer portal and pricing