Real-time due diligence on Lithuanian legal entities, straight from the state registers, delivered machine-to-machine and optionally carrying a qualified electronic signature.
The service is provided as a legal service by a Lithuanian advokatas. It is not public: production keys are issued once the engagement agreement is signed. Sandbox keys are self-serve and answer synthetic data, so you can build the integration before any paperwork.
Everything is keyed by the Lithuanian legal-entity code (juridinio asmens kodas).
| Data | Endpoint | JSON | + JAdES‑T | + JAdES‑LT | + ASiC‑E |
|---|---|---|---|---|---|
| Company profile | /v1/entities/{code} |
€0.30 | €1.79 | €2.79 | €4.79 |
| Shareholders and members | /v1/entities/{code}/participants |
€0.65 | €2.14 | €3.14 | €5.14 |
| Beneficial owners (UBO) purpose | /v1/entities/{code}/ubo |
€0.15 | €1.64 | €2.64 | €4.64 |
| Real property held | /v1/entities/{code}/real-estate |
€0.35 | €1.84 | €2.84 | €4.84 |
| Property object extract | /v1/real-estate/{uniqueNumber} |
€0.70 | €2.19 | €3.19 | €5.19 |
| Property seizure acts | /v1/entities/{code}/seizures |
€0.70 | €2.19 | €3.19 | €5.19 |
| Court cases | /v1/entities/{code}/cases |
€0.10 | €1.59 | €2.59 | €4.59 |
| Full due-diligence report purpose | /v1/entities/{code}/dd-report |
€1.29 | €2.78 | €3.78 | €5.78 |
Prices exclude VAT. You are billed per answered call. A no-data answer and an upstream register failure are never billed – you only pay for an answer we could actually give.
curl -H "Authorization: Bearer $TVARKA_DD_KEY" \
https://api.tvarka.pro/v1/entities/133663153
Sandbox keys start ddk_test_, production keys ddk_live_. Sandbox never reaches a register and costs nothing.
purpose – one of AML_KYC, BUSINESS_RELATIONSHIP_DD, TRANSACTION_DD, LEGAL_CLAIM, OTHER – which is logged against the call.
Add ?sign=jades-t or ?sign=jades-lt and the same JSON comes back wrapped in a JAdES signature (ETSI TS 119 182-1, flattened JWS JSON serialization), created with the qualified electronic signature of the responsible advokatas plus a qualified timestamp. The LT level also embeds the certificate chain and revocation data, so the artifact still validates years later without a live responder. ?format=asice returns an ASiC-E container holding the normalized JSON, the raw register response and the same qualified signature.
What the signature certifies is provenance and integrity: that the named advokatas relayed this data unmodified from the named official source at the stated time, as part of a legal service. It is not a document issued by the register itself.
If a signature cannot be produced, the request fails with 503 and is not billed. You will never receive an unsigned body at a signed-tier price.
Every non-2xx is RFC 9457 application/problem+json. The two that matter operationally are 404 …/no-data (the register answered and holds nothing – not billed) and 502 …/upstream-unavailable (the register did not answer – not billed, retry).
The same products are available to agents over the Model Context Protocol at https://api.tvarka.pro/mcp (Streamable HTTP), using the same key and the same pricing.
| Tool | What it returns |
|---|---|
lookup_company | Look up a Lithuanian company |
get_participants | Shareholders and members |
get_beneficial_owners | Beneficial owners (UBO) |
get_real_estate | Real property held by the entity |
get_seizures | Property seizure acts |
get_court_cases | Court case involvement |
get_due_diligence_report | Full due-diligence report |
OpenAPI 3.1 (YAML) · OpenAPI 3.1 (JSON)
Write to [email protected] for a sandbox key. Production access follows the signed engagement agreement.