> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sylvian.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Forms API

> Parse PDFs and fill forms programmatically.

Use the Forms API to parse PDFs, fill forms from natural-language instructions, and download completed documents.

<Card title="API reference" icon="terminal" href="/api-reference/introduction" horizontal>
  View endpoints, authentication, examples, and the full API workflow.
</Card>

## Quick start

1. **Parse** a PDF: `POST /parse` with your file
2. **Poll** until ready: `GET /parse/{job_id}`
3. **Fill** from a prompt: `POST /fill` with `file_id` and instructions
4. **Poll** fill status: `GET /fill/{job_id}`
5. **Download** the result from the returned `download_url`

## Base URL

`https://api.sylvian.ai`

## Authentication

Use an API key in the `X-API-Key` header. Create keys in your Sylvian dashboard.