@schemavaults/send-email

TypeScript client for sending emails via the @schemavaults/mail-server API. Provides request body validation (via Zod), environment-aware server URL resolution, and helpers for sending to individual recipients, mailing lists, and listing available email templates.

Installation

bun add @schemavaults/send-email
# or
npm install @schemavaults/send-email

Environment variables

Variable	Required	Description
SCHEMAVAULTS_MAIL_API_KEY	Yes	Bearer token for the mail-server API. Starts with svlts_mail_pk_.
SCHEMAVAULTS_MAILING_LIST_ID	For mailing list sends	UUID of the target mailing list.
SCHEMAVAULTS_APP_ENVIRONMENT	No	"production" (default), "development", or "staging". Controls which mail-server instance is targeted.

Usage

Send an email

import { sendEmail } from "@schemavaults/send-email";

// Using a registered template
await sendEmail({
  body: {
    to: "user@example.com",
    subject: "Welcome!",
    message: {
      template_id: "welcome-email",
      template_props: { name: "Alice" },
    },
  },
});

// Using raw text/html
await sendEmail({
  body: {
    to: "user@example.com",
    subject: "Hello",
    message: {
      text: "Hello from SchemaVaults.",
      html: "<p>Hello from SchemaVaults.</p>",
    },
  },
});

Send to a mailing list

import { sendEmailToMailingList } from "@schemavaults/send-email";

await sendEmailToMailingList({
  body: {
    subject: "Weekly update",
    message: {
      text: "Here's what happened this week.",
      html: "<p>Here's what happened this week.</p>",
    },
  },
});

The mailing list UUID is read from SCHEMAVAULTS_MAILING_LIST_ID by default. You can override it per-call:

await sendEmailToMailingList({
  mailingListId: "00000000-0000-0000-0000-000000000000",
  body: { subject: "...", message: { text: "...", html: "..." } },
});

List available email templates

import { listEmailTemplates } from "@schemavaults/send-email";

const templates = await listEmailTemplates();
// => [{ id: "welcome-email", description: "..." }, ...]

Validate a request body

The package exports the Zod schema used by both this client and the mail-server to validate request bodies:

import { createSendEmailRequestBodySchema } from "@schemavaults/send-email";

// Pass `true` to allow mailing list UUIDs in the `to` field
const schema = createSendEmailRequestBodySchema(true);
const result = schema.safeParse(body);

API

sendEmail(opts)

Sends an email to one or more recipients.

interface ISendEmailOpts {
  body: SendEmailRequestBody;
  bearerToken?: string;       // overrides SCHEMAVAULTS_MAIL_API_KEY
  mailServerUrl?: string;     // overrides resolved server URL
  environment?: "production" | "development" | "staging";
}

sendEmailToMailingList(opts)

Sends an email to a mailing list audience. The to, cc, and bcc fields are not accepted -- the audience is the mailing list.

interface ISendEmailToMailingListOpts {
  body: Omit<SendEmailRequestBody, "to" | "cc" | "bcc">;
  mailingListId?: string;     // overrides SCHEMAVAULTS_MAILING_LIST_ID
  bearerToken?: string;
  mailServerUrl?: string;
  environment?: "production" | "development" | "staging";
}

listEmailTemplates(opts?)

Returns the list of registered email templates from the mail-server catalog.

interface IListEmailTemplatesOpts {
  bearerToken?: string;
  mailServerUrl?: string;
  environment?: "production" | "development" | "staging";
}

interface EmailTemplate {
  id: string;
  description: string;
}

getSchemaVaultsMailApiKey()

Reads and returns SCHEMAVAULTS_MAIL_API_KEY from the environment. Throws if not set.

createSendEmailRequestBodySchema(allowMailingListIds?)

Returns a Zod schema for validating send-email request bodies. Pass true to allow UUIDs (mailing list IDs) in the to field.

emailTemplateIdSchema

Zod schema for validating template IDs: lowercase alphanumeric with hyphens/underscores, 1-64 characters, must start with a letter.

Request body shape

The message field accepts either a template reference or raw content:

type Message =
  | { template_id: string; template_props?: unknown }
  | { text: string; html: string }; // both required

type SendEmailRequestBody = {
  to: string | string[];       // email address(es) or mailing list UUID
  subject: string;
  message: Message;
  from?: string;               // defaults to mail-server's configured sender
  replyTo?: string;
  cc?: string | string[];
  bcc?: string | string[];
};

Development

bun install
bun run build
bun test
bun run typecheck
bun run lint