Build with FluxDigest

Developer preview

The public API and official SDK are being built. The contracts in these docs define the target developer experience and may change before the first beta.

FluxDigest gives applications a programmable path from subscriber data to a delivered newsletter. Use the API for direct control, an official SDK for an idiomatic language interface, and webhooks to react to changes without polling.

One workspace boundaryEvery resource and credential is scoped to a FluxDigest workspace.

Predictable operationsTyped errors, idempotency, request IDs, and cursor pagination are part of the contract.

Events you can trustSigned webhooks support durable subscriber, campaign, and delivery workflows.

Start here

Rocket

Quickstart

Create a client and make your first request.

Braces

TypeScript SDK

Install and use the first official SDK.

FileCode

API reference

Inspect resources, parameters, responses, and errors.

Webhook

Webhooks

Receive signed events and handle retries safely.

Common workflows

Synchronize subscribers

Create or import contacts without duplicate side effects.

Send a campaign

Trigger an idempotent campaign send.

Handle campaign events

Verify raw webhook bodies before processing them.

Platform shape

All public resources live below a workspace:

https://api.fluxdigest.com/v1/workspaces/{workspace_id}/{resource}

Server integrations authenticate with a scoped API key. Third-party apps will use OAuth 2.1 when the app authorization flow enters beta. The first-party dashboard continues to use its own Supabase session authentication and is not the public integration contract.

Keep secrets on the server

Never place an fd_live_ or fd_test_ API key in browser code, mobile apps, public repositories, logs, or client-side environment variables.