# Blueink Developer Documentation

Blueink is a REST API for embedding electronic signatures into your applications. Send documents for signature, track status in real time, retrieve signed PDFs, and react to signing events — all programmatically.

**New here?** Start with the [Quick Start guide](/docs/quick-start) to authenticate and send your first envelope.

## What's in these docs

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    <div className="card-header">
      <Basics /><h4>Quick Start</h4>
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    <p>Authenticate, send your first envelope, and retrieve the signed PDF in minutes.</p>
    <Link to="/docs/quick-start">
      <p class="mb-0">Get started</p>
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      <Schema /><h4>Core Concepts</h4>
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    <p>Understand the data model: packets, bundles, signers, and signature fields.</p>
    <Link to="/docs/esignature-api/concepts">
      <p class="mb-0">See Concepts</p>
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    <div className="card-header">
      <h4>Authentication</h4>
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    <p>Generate an API token and authenticate your requests against the Blueink REST API.</p>
    <Link to="/docs/esignature-api/authentication">
      <p class="mb-0">See Authentication</p>
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      <EventTriggers /><h4>Webhooks</h4>
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    <p>Receive real-time events when packets are sent, viewed, signed, or declined.</p>
    <Link to="/docs/esignature-api/webhook">
      <p class="mb-0">See Webhooks</p>
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      <Resources /><h4>SDKs &amp; Libraries</h4>
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    <p>Official clients for Python, JavaScript, PHP, and .NET.</p>
    <Link to="/docs/libraries">
      <p class="mb-0">See Libraries</p>
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      <Learn /><h4>Guides</h4>
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    <p>Embedded signing, auto-placement, HTML-to-PDF, templates, and more.</p>
    <Link to="/docs/guides">
      <p class="mb-0">See Guides</p>
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