> For the complete documentation index, see [llms.txt](https://firstoken.gitbook.io/api-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://firstoken.gitbook.io/api-docs/guides.md).

# Guides

- [Quick Start: Tokenize a Card via API](https://firstoken.gitbook.io/api-docs/guides/quick-start-tokenize-a-card-via-api.md)
- [How Firstoken Works to Reduce Your Scope](https://firstoken.gitbook.io/api-docs/guides/how-firstoken-works-to-reduce-your-scope.md)
- [Implementing Hosted Iframes](https://firstoken.gitbook.io/api-docs/guides/implementing-hosted-iframes.md)
- [How Captures works](https://firstoken.gitbook.io/api-docs/guides/implementing-hosted-iframes/how-captures-works.md)
- [Generating a JSON Web Token](https://firstoken.gitbook.io/api-docs/guides/implementing-hosted-iframes/generating-a-json-web-token.md)
- [JSON form Schema](https://firstoken.gitbook.io/api-docs/guides/implementing-hosted-iframes/json-form-schema.md)
- [Iframe Communication](https://firstoken.gitbook.io/api-docs/guides/implementing-hosted-iframes/iframe-communication.md)
- [Implementing Captures SDK JS](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js.md)
- [Getting Started](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/getting-started.md)
- [Functions](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/functions.md): Callback functions allow you to customize the logic of the form.
- [Type of Elements](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/type-of-elements.md)
- [Elements Options](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/elements-options.md)
- [JWT Authentication for Firstoken SDK](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/jwt-authentication-for-firstoken-sdk.md)
- [CSS Object](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/css-object.md)
- [Full Example of usage](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/full-example-of-usage.md)
- [SDK versions](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/sdk-versions.md)
- [Migration & Compatibility](https://firstoken.gitbook.io/api-docs/guides/implementing-captures-sdk-js/migration-and-compatibility.md)
- [Implementing Monitor](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor.md)
- [CSP Real-Time Monitoring](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/csp-real-time-monitoring.md)
- [How it works in practice](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/csp-real-time-monitoring/how-it-works-in-practice.md)
- [Security Headers Scanner](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/security-headers-scanner.md)
- [How Security Headers Scanning Works](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/security-headers-scanner/how-security-headers-scanning-works.md)
- [Resources and Script Inventory](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/resources-and-script-inventory.md)
- [How Resources Inventory Works](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/resources-and-script-inventory/how-resources-inventory-works.md)
- [PCI DSS 11.6.1 Compliance](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/pci-dss-11.6.1-compliance.md)
- [PCI DSS 6.4.3 Compliance](https://firstoken.gitbook.io/api-docs/guides/implementing-monitor/pci-dss-6.4.3-compliance.md)
- [Implementing Reverse Proxy](https://firstoken.gitbook.io/api-docs/guides/implementing-reverse-proxy.md)
- [SFTP File Processing](https://firstoken.gitbook.io/api-docs/guides/sftp-file-processing.md)
- [Migrate Stored Cards to Firstoken](https://firstoken.gitbook.io/api-docs/guides/migrate-stored-cards-to-firstoken.md)
- [3D-Secure: Full Implementation Guide](https://firstoken.gitbook.io/api-docs/guides/3d-secure-full-implementation-guide.md): Guide to integrate 3D-Secure in your own checkout using the Firstoken API and Cardinal Songbird in the browser.
- [Cardinal Songbird Integration](https://firstoken.gitbook.io/api-docs/guides/cardinal-songbird-integration.md)
- [KOIN - Device Fingerprint Session ID](https://firstoken.gitbook.io/api-docs/guides/koin-device-fingerprint-session-id.md)