Sendinblue
A service that provides solutions relating to marketing and/or transactional email and/or SMS
Email for AI agents: send email, receive replies as threads, with per-key send limits and approvals.
SendRaven API is a free Email API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Base URL, authentication, scopes, pagination, errors, idempotency and rate limits: what every endpoint has in common.
Details from sendraven.ai.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
A service that provides solutions relating to marketing and/or transactional email and/or SMS
A cloud-based SMTP provider that allows you to send emails without having to maintain email servers
Bulk email verification with full SMTP server responses
The SendRaven API is provided by SendRaven (sendraven.ai). Base URL, authentication, scopes, pagination, errors, idempotency and rate limits: what every endpoint has in common.
Yes. The SendRaven API is listed in the Email category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The SendRaven API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The SendRaven API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The SendRaven API is served over HTTPS, so it's safe to use in production.