// developers

An email API
that gets out of the way.

REST over HTTPS. JSON in, JSON out. Idempotency keys, deterministic error codes, signed webhooks. Built by people who hate touching email infrastructure as much as you do.

Read the docsAPI reference →
curl — send your first emailcurl https://api.voltmail.dev/v1/emails \
  -H "Authorization: Bearer $VOLTMAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "noreply@receipts.acme.dev",
    "to": ["jane@example.com"],
    "subject": "Hello",
    "text": "It works."
  }'

// jump in

// start

Quickstart

Verify a domain, mint a key, send your first email in 60 seconds.

// reference

API reference

Every endpoint, every parameter, every status code — with curl + JSON examples.

// sdks

SDKs

Six official languages, all generated from the same OpenAPI spec.

// realtime

Webhooks

Signed event payloads for every state change. At-least-once delivery, dedupe by event id.

// spec

OpenAPI 3.1

Machine-readable spec — drop into Stainless, Speakeasy, or your own codegen.

// tooling

Postman

Importable collection. Set the api_key variable, fire the endpoint, debug.