# Electronic invoicing for developers

> Emit Chilean electronic tax documents (DTEs) with a typed API, a TypeScript SDK and docs designed for coding agents.

- **Quickstart**
    Create your sandbox API key (synthetic certificate and CAF, no paperwork)
    and emit your first DTE with one HTTP call — in curl, C#, Java, Python or
    TypeScript. The API computes VAT, assigns the folio, signs the XML and
    submits it to the (simulated) SII for you.

    [Go to the quickstart →](/en/comienza/quickstart/)
- **API reference**
    All 12 DTE document types, states and transitions, folios (CAF), digital
    certificate, signed webhooks, errors, pagination and limits — fully
    documented.

    [Explore the reference →](/en/referencia/tipos-de-dte/)
- **For your coding agent**
    Plain-markdown docs, an [`llms.txt`](/llms.txt) with the whole site in
    LLM-ready form and an integration playbook ready to hand to your agent.
    Plus read-only access over MCP.

    [Connect your agent →](/en/agentes/conecta-tu-agente/)
- **TypeScript SDK (not yet published)**
    `@simplohq/sdk`: zero dependencies, strict types, automatic idempotency
    and retries, `for await` pagination and webhook verification. In
    preparation — not published yet; integrate via the REST API today.

    [Meet the SDK →](/en/agentes/sdk/)

> **Sandbox today, production when you're ready:**
> The **sandbox** is self-serve: create your `sk_simplo_sandbox_` key at
> app.simplo.cl → Desarrolladores and emit right away. **Production** emission
> is enabled per company — write to
> [hola@simplo.cl](mailto:hola@simplo.cl) once you've completed the
> [go-live checklist](/en/comienza/pasar-a-produccion/).

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HTML version: https://docs.simplo.cl/en/ · Agent index: https://docs.simplo.cl/llms.txt