# Keynua > Keynua is a Latin American digital identity and electronic signature platform. Design signing flows combining video, drawn, OTP, and digital signatures with biometric identity verification (liveness, facial matching, 3D/selfie/video identification, geopositioning). The REST API covers contracts, document templates, identity verification, OTP, and Deceval promissory notes, delivered to signers over WhatsApp, SMS, or email with signed webhooks. Supports 20+ Latin American identity documents across 20 countries. ## API - [Keynua API reference (Slate)](https://keynua.github.io/slate): full REST reference — contracts, signing, templates, identity verification, OTP, Deceval, webhooks, errors. - Production base URL: https://api.keynua.com - Staging base URL: https://api.stg.keynua.com - Auth: two headers on every request — `x-api-key` (API Key Secret) and `authorization` (API Token Secret). ## Operations - Contracts: `PUT /contracts/v1`, `GET /contracts/v1/{contractId}`, `DELETE /contracts/v1/{contractId}`, `POST /contracts/v1/{contractId}/delete-documents`, `POST /contracts/v1/approve-contract`, `POST /contracts/v1/decline-contract` - Signing: `POST /contracts/v1/sign`, `POST /contracts/v1/sign/upload`, `PUT /contracts/v2/sign/batch` - Document templates: `GET /document-templates/v1`, `GET /document-templates/v1/{templateId}`, `POST /document-templates/v1/{templateId}/generate` - Identity verification: `POST /identity-verification/v1`, `GET /identity-verification/v1`, `GET /identity-verification/v1/{verificationId}` - OTP: `POST /otp/v1/send`, `POST /otp/v1/verify`, `POST /otp/v1/create-as-owner`, `GET /otp/v1/info` - Deceval: `POST /deceval/v1/crear-girador-natural`, `POST /deceval/v1/consultar-girador` ## Events (webhooks) - ItemWorking, ItemSuccess, ItemError, ContractFinished, ContractDeleted — signed with `Keynua-Signature` and `Keynua-Signature-V2`. ## Docs - [Developer settings & webhooks](https://keynua.github.io/slate) - [Android integration example](https://github.com/Keynua/android-integration-example) - [iOS integration example](https://github.com/Keynua/ios-integration-example) - [Web integration example](https://github.com/Keynua/web-integration-example) - [GitHub organization](https://github.com/Keynua) ## Company - [Website](https://www.keynua.com/en) - [Plans / pricing](https://www.keynua.com/en/plans/) - [Sign in](https://app.keynua.com?lang=en) - [Free trial request](https://www.keynua.com/en/account-request/) - [Status page](https://status.keynua.com) - [Terms and conditions](https://www.keynua.com/en/legal/terms-and-conditions/) - [Privacy policy](https://www.keynua.com/en/legal/privacy-policy/)