Track user data, trigger campaigns and Canvases, send messages, and manage email subscriptions in Braze.
Braze ships in the w6w first-party pack. It declares 22 actions, 2 health checks, and the host runs its code in a sandbox that never sees the credential.
io.w6w.brazeBraze is a customer engagement platform that runs cross-channel marketing automation — email, push, SMS, in-app, and Canvas multi-step journeys — off a single user profile. This app covers the operations a workflow most needs around that profile and its outbound messaging: track custom events, purchases, and attribute updates onto a user; resolve aliases and identities; export full profiles; and delete users on request.
On the sending side, it triggers API-triggered Campaign and Canvas sends against an audience filter or an explicit recipient list, and sends immediate ad-hoc messages outside of any saved campaign. It manages email subscription state directly and reads back hard bounces and unsubscribes, and it reads and writes the supporting content a campaign is built from — Content Blocks and catalogs — plus lists campaigns, Canvases, and segments for discovery.
Braze runs each customer’s workspace on one of several fixed regional clusters rather than a single API host, and a REST key from one cluster is rejected by every other, so the app asks which instance a Connection is on rather than guessing.
Three routes to the same 22 actions. The Workflow tab is generated from Braze's own manifest and carries its real ids, so it is copy-pasteable; the Code and CLI examples are the same call for any action on any app, so every app-specific value in them is a blank you fill in.
campaign-details-get Fetch full configuration and channel details for one campaign.
campaign-trigger-send Send an API-triggered campaign to an audience and/or explicit recipients.
catalog-list List every catalog defined in the workspace, with field schemas and item counts.
email-hard-bounces-list Query email addresses that have hard bounced, optionally in a date range.
email-status-set Subscribe, unsubscribe, or opt an email address out of subscribed messaging.
email-unsubscribes-list Query email addresses that have unsubscribed, optionally in a date range.
sms-invalid-phone-number-list Query phone numbers Braze has found undeliverable, by date range or explicit list.
user-export-ids Export full user profiles by external ID, alias, device ID, Braze ID, or contact.
A workflow step names the app and the action, and the editor fills in the
connection when you pick one. This is the Step shape from the
workflow spec, carrying Braze's real ids.
{
"manifestVersion": "2",
"name": "braze-example",
"steps": [
{
"id": "campaign-details-get",
"uses": {
"app": "io.w6w.braze",
"action": "campaign-details-get",
"connection": "conn_YOUR_CONNECTION_ID"
},
"with": {
"campaignId": "<campaignId>"
}
}
]
}campaign-details-get campaign-list campaign-trigger-send canvas-details-get canvas-list +17 more actions available
Every app-specific value here is a blank you have to fill in. An
app action is reached through the connection that authenticates it, so the
address is a connection id, not the app id — and connections belong to your account,
so a public page cannot know yours. Create one for Braze, then fill in
the three blanks: conn_YOUR_CONNECTION_ID, the action key, and the
parameters that action declares. The call itself is real — the shape is transcribed
from the studio's own snippet builder, which prints the same kind of blanks — but
nothing in it is specific to Braze. The Workflow tab is where this app's
real ids are.
npm install @w6w/sdkyarn add @w6w/sdkpnpm add @w6w/sdkdeno add npm:@w6w/sdkimport { W6wClient, isActionRun } from "@w6w/sdk";
// Reads W6W_BASE_URL and W6W_TOKEN from the environment when omitted.
const client = new W6wClient();
const envelope = await client.run({
urn: "conn_YOUR_CONNECTION_ID",
action: "campaign-details-get",
payload: {
campaignId: "<value>",
},
});
if (isActionRun(envelope)) console.log(envelope.value); npm install -g @w6w/cli w6w run conn_YOUR_CONNECTION_ID --action campaign-details-get --payload '{"campaignId":"<value>"}' Give an AI agent Braze — without giving it Braze's credentials. One MCP endpoint exposes every app, function and workflow the caller is entitled to, as tools it can discover and run. Access is granted per team while we onboard.
One tool call{
"name": "w6w_invoke",
"arguments": {
"ref": "app:io.w6w.braze#campaign-details-get",
"input": {
"campaignId": "<campaignId>"
}
}
}
Every tool names its target with a single ref. The
app: form above doesn't name a connection at all — the
host resolves which of the caller's Braze connections to sign
with, and refuses rather than guesses when the answer is ambiguous.
The token is attached host-side, at the moment of the call. It is never a tool argument, never in the model's context, and never in a transcript — so a prompt injection has nothing to exfiltrate.
Tools are derived per end user from what that person has actually connected and is entitled to — not one shared bot identity carrying the union of everyone's access.
Multi-step work runs on the workflow engine and returns a run handle the agent can poll — retries, branching and state survive the conversation that started them.
Braze's declared health checks are on the surface too, so an agent can tell "the vendor is down" from "your credential expired" before it burns a retry on either.
The MCP surface is part of the hosted platform. Braze itself is MIT, and the runtime that executes it is source-available (FSL).
Braze declares its own checks, so its health is a property of the app rather than something the host guesses at.
The REST APIs component for THIS connection's cluster on Braze's status page. Reads the Connection for the instance; sends no credential.