freeapis

PostStack

EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics

Authentication
API Key
HTTPS
Yes
CORS
No
Category
Email
Documentation / URL
https://poststack.dev/docs

Overview

PostStack provides EU-hosted email — key-based.

⚠️ Status (verified 2026-08): a guessed path returned HTTP 404 — the route paths differ. Check the docs for valid routes.

What it provides

curl "https://api.poststack.dev/v1/emails?key=YOUR_KEY"

Notes

  • Transactional/marketing email.
  • Route paths per the docs.

FAQ

Is PostStack free? Key-based with a free tier per the docs.

Why 404? Our 2026-08 guess path was wrong (verified) — check the docs.

What does it return? Email data.

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