API archive entry · source-reported
PostStack
EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics
Decision snapshot
PostStack is catalogued as a Email API from PostStack. The directory reports api key authentication, HTTPS support, and CORS as no.
- Category
- Authentication
- API key
- HTTPS
- Reported
- CORS
- No
Evaluation pathway
- Define endpoints, fields, freshness, and expected request volume.
- Read the live source and confirm access, terms, limits, and version.
- Test representative inputs, errors, latency, pagination, and data quality.
- Plan monitoring, retries, caching, version pinning, and a fallback.
What still needs verification
Pricing and quotas
Confirm current plans, free-tier limits, overages, and request ceilings.
Endpoint coverage
Check that the operations and response fields match the intended workload.
Reliability
Look for uptime history, a status page, support routes, and service commitments.
Data and privacy
Review retention, licensing, regional processing, and compliance requirements.
Versioning
Confirm the active version, change policy, deprecation window, and migration guidance.
Developer experience
Validate SDKs, examples, error formats, pagination, and test environments.
Nearby Email options
inboxsink
Disposable inboxes for end-to-end tests that wait for the email and extract OTP codes
API key · HTTPS reported · CORS No
Atomic Mail
Email for AI agents: programmatic inbox creation and send/receive over JMAP
API key · HTTPS reported · CORS Unknown
Cloudmersive Validate
Validate email addresses, phone numbers, VAT numbers and domain names
API key · HTTPS reported · CORS Yes
Source reference
This page separates source-reported facts from questions that need live provider verification.