> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/api-reference/open-api-references/3d-secure.md).

# 3D Secure

The **3D Secure API** enables merchants to authenticate cardholders using the 3DS protocol, supporting both frictionless and challenge flows compliant with the Strong Customer Authentication (SCA) directive. Use these endpoints to initiate authentication lookups, manage JWT handshakes with the 3DS Client SDK, and query historical authentication records.

{% hint style="info" %}
All endpoints support both **Bearer (JWT)** and **Basic** authentication. See the [Authentication](#authentication) section below for details.
{% endhint %}

## Environments

{% tabs %}
{% tab title="Production" %}

<table><thead><tr><th width="194.6666259765625">Region</th><th>Base URL</th></tr></thead><tbody><tr><td>EMEA</td><td><code>https://emea.gsc.verifone.cloud/oidc/3ds-service</code></td></tr><tr><td>Americas</td><td><code>https://us.gsc.verifone.cloud/oidc/3ds-service</code></td></tr><tr><td>New Zealand</td><td><code>https://nz.gsc.verifone.cloud/oidc/3ds-service</code></td></tr></tbody></table>
{% endtab %}

{% tab title="Sandbox" %}

<table><thead><tr><th width="184.666748046875">Region</th><th>Base URL</th></tr></thead><tbody><tr><td>Global Sandbox</td><td><code>https://cst.test-gsc.vfims.com/oidc/3ds-service</code></td></tr><tr><td>Americas Sandbox</td><td><code>https://uscst-gb.gsc.vficloud.net/oidc/3ds-service</code></td></tr></tbody></table>
{% endtab %}
{% endtabs %}

## API Reference

<table data-view="cards"><thead><tr><th>Name</th><th>Description</th><th data-hidden data-card-target data-type="content-ref">Page</th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-cover-dark data-type="image">Cover image (dark)</th></tr></thead><tbody><tr><td><strong>3DS Authentication</strong></td><td>List, count, and retrieve historical 3DS authentication records with rich filtering support.</td><td><a href="/spaces/OiXbo96Og9EN7rz2U44K/pages/51f2deb6988c495e9d8af2e9cd7d4193a821d357">/spaces/OiXbo96Og9EN7rz2U44K/pages/51f2deb6988c495e9d8af2e9cd7d4193a821d357</a></td><td data-object-fit="fill"><a href="/files/sHVUoUB1ALSjD0VstKV3">/files/sHVUoUB1ALSjD0VstKV3</a></td><td data-object-fit="fill"><a href="/files/jH5qUEHroD38NdV29emQ">/files/jH5qUEHroD38NdV29emQ</a></td></tr><tr><td><strong>Lookup</strong></td><td>Initiate cardholder authentication — triggers frictionless or challenge flow and returns the authentication outcome.</td><td><a href="/spaces/OiXbo96Og9EN7rz2U44K/pages/1cc7f27234c9f176df708699dccd4df687542a0f">/spaces/OiXbo96Og9EN7rz2U44K/pages/1cc7f27234c9f176df708699dccd4df687542a0f</a></td><td data-object-fit="fill"><a href="/files/Rdf5FWD3fIZqc2g0WmLz">/files/Rdf5FWD3fIZqc2g0WmLz</a></td><td data-object-fit="fill"><a href="/files/1og0RnERdrJm7rSW9VEW">/files/1og0RnERdrJm7rSW9VEW</a></td></tr><tr><td><strong>JWT</strong></td><td>Create and validate JWTs for the 3DS Client SDK authentication handshake.</td><td><a href="/spaces/OiXbo96Og9EN7rz2U44K/pages/f7c36444939ab34c9fafba41eb0626cf34b38233">/spaces/OiXbo96Og9EN7rz2U44K/pages/f7c36444939ab34c9fafba41eb0626cf34b38233</a></td><td data-object-fit="fill"><a href="/files/ACrmKokMuGOuhxS45S6X">/files/ACrmKokMuGOuhxS45S6X</a></td><td data-object-fit="fill"><a href="/files/RHq9vp7jGXePBqDumU0k">/files/RHq9vp7jGXePBqDumU0k</a></td></tr></tbody></table>

## Authentication

All endpoints accept either authentication method on each request.

{% columns %}
{% column %}

#### Bearer (JWT)

Pass a signed JWT in the `Authorization` header:

```http
Authorization: Bearer <token>
```

The JWT must be signed with your Verifone-provisioned private key and must include `entity_id`, `sub` (user\_id), and `roles` claims.
{% endcolumn %}

{% column %}

#### Basic Auth

Pass base64-encoded `username:password` in the `Authorization` header:

```http
Authorization: Basic <credentials>
```

{% endcolumn %}
{% endcolumns %}


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