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Channel Overview

Integration URLs are publicly accessible — no authentication is required at request time. Customer IDs in URL parameters are public by design (visible in email HTML, browser history, and server logs). Use opaque identifiers, not email addresses or other PII.

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Email Integration

Insert a single image tag (or HTML embed code) in your ESP template. The tag URL encodes the Workflow ID and a customer identifier as a query parameter.
No server-side code required. Works with any ESP (Salesforce Marketing Cloud, Braze, Selligent, Adobe Campaign, custom solutions). How it works: When the recipient opens the email, the email client requests the image. Reelevant renders personalised Content at that moment using the customer’s current data — not data from send time.

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Web Integration

Two options depending on your rendering strategy: Available for Node.js frameworks. The SDK calls the Runner at page-render time and injects personalised Content into the HTML response. Supported frameworks:
  • Next.js (App Router and Pages Router)
  • Nuxt (Nuxt 3)
  • Remix
  • SvelteKit
  • Generic Node.js (Express, Fastify, or any HTTP server)

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Client-side script

A lightweight JavaScript snippet that fetches and renders Content in the browser. Suitable for static sites, SPAs, or when SSR is not available.

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Mobile Integration

Native SDKs handle initialisation, Content fetching, identity management, and view lifecycle: A JSON API fallback is available for custom implementations or platforms without native SDK support.

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JSON API (Headless)

For headless integrations (push notifications, in-app messages, custom frontends), the JSON API returns structured payloads matching a JSON Template schema defined in the platform. The response shape is deterministic and typed — your client code can rely on the schema without runtime type checking.

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Content Delivery Formats

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Next Steps

Web SDK Reference

Full server-side and client-side SDK documentation.

Mobile SDK Reference

iOS, Android, and Flutter SDK guides.

JSON API

Headless JSON API integration guide.

API Reference

Full REST API documentation.