# One-Shot API

**One-Shot** is the solution for electronic signatures based on **single-use certificate issuance**. One-Shot API is the interface for the Uanataca One-Shot Signature service, which you can integrate into your application or web platform.

Only **hashes** of the documents to be signed are sent to the signature service; no sensitive document content leaves your premises. Documents are signed using single-use digital certificates created at the moment of the signature operation. Signatures include a timestamp, providing a reliable date and time.

## Documentation structure

### Enterprise Documentation

- **Get started** — Prerequisites, sandbox access, RAO tokens, architecture, and signing flow. See [Get started](/products/namirialpkiaas/one-shot/enterprise-documentation/get-started/get-started), [Architecture](/products/namirialpkiaas/one-shot/enterprise-documentation/get-started/architecture), and [Signing flow](/products/namirialpkiaas/one-shot/enterprise-documentation/get-started/signing-flow).
- **Products and modules** — Workflows: classic (OTP/SMS), hash signature, asynchronous mode, and VideoID (eIDAS and External). See [Workflows overview](/products/namirialpkiaas/one-shot/enterprise-documentation/products-and-modules/workflows/overview).
- **Developer documentation** — API reference (OpenAPI), webhooks, configuration, Docker installation, Postman. See [Developer documentation overview](/products/namirialpkiaas/one-shot/enterprise-documentation/developer-documentation/overview) and [API reference](/products/namirialpkiaas/one-shot/openapi).
- **Administrator guides** — Operator and RA configuration. See [Administrator guides overview](/products/namirialpkiaas/one-shot/enterprise-documentation/administrator-guides/overview).


### Customer Documentation

End-user FAQs, manuals, documents, and service. See [Customer documentation](/products/namirialpkiaas/one-shot/customer-documentation/overview).