API & developers

Everything in Apex, from your terminal and your code

A versioned REST API with scoped keys, signed webhooks, the apex CLI, an MCP server for AI clients and a browser SDK with React bindings.

See if your shop is a fit Open the docs

Install the CLI

npm install -g @drip-apex/apex-cli
apex login

Run the MCP server

npx -y @drip-apex/mcp-server

Create a webhook

POST /api/v1/webhooks
Authorization: Bearer apx_your_key_here
Content-Type: application/json

{
  "url": "https://example.com/apex/webhooks",
  "events": ["experiment.started", "experiment.completed"]
}

What you can build on

REST API v1

Experiments, goals, flags, personalizations, analytics, backlog and more under /api/v1, described by a public OpenAPI spec. Keys are scoped, hashed at rest, rate-limited and revocable. Launching a test stays in the dashboard, behind its approval and QA gates.

Signed webhooks

Eight events, from experiment.started to experiment.guardian_paused. Every delivery carries an HMAC-SHA256 signature, retries with backoff and shows up in a delivery log.

The apex CLI

Sign in through the browser, check out a variation's workspace files, develop against your live page and publish, from the terminal or your CI.

MCP server

Connect Claude Desktop, Claude Code or Cursor. List tests, inspect a draft, start or pause an experiment, read goals, pull brand context and generate QA preview links.

Browser SDK

@drip-apex/sdk on npm, with typed code-owned experiments, feature flags and React bindings. It runs in the browser; there are no server SDKs.

Server-side assignment

Any backend can ask the assign endpoint for a visitor's variants over HTTP and gets the same answer the browser and the edge would. Or deploy the Apex edge worker on your own Cloudflare account.

In the docs

Developer overview API reference Webhooks CLI MCP server SDK quickstart

Want Apex on your shop?

Apex can come with the research on your shop and the team that reads the results, or run on its own, and a free plan for one store needs no card. The main way in is a call: if your shop does six figures a month, book one and we'll find the setup that fits.

See if your shop is a fit

30 minutes, and you'll know exactly where your shop stands.