Compare the Top Email APIs that integrate with Codex CLI as of August 2026

This a list of Email APIs that integrate with Codex CLI. Use the filters on the left to add additional filters for products that have integrations with Codex CLI. View the products that work with Codex CLI in the table below.

What are Email APIs for Codex CLI?

Email APIs allow users to incorporate functionality related to email into their applications. Generally, users can send automated email messages, fetch user data from emails, and store user actions with an API. These APIs are often easy to set up and integrate into a client's application. They also provide a secure layer of encryption between the email server and the application. Compare and read user reviews of the best Email APIs for Codex CLI currently available using the table below. This list is updated regularly.

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    Sendmux

    Sendmux

    Sendmux

    Sendmux gives AI agents their own inbox and a controlled way to send email. Each agent can receive messages, read threads, handle attachments, send replies, and react to new mail through signed webhooks or Server-Sent Events. Teams can send through Gmail OAuth, Outlook OAuth, SMTP providers, or managed Amazon SES. Sendmux can spread sending across providers with weighted routing, sender-domain routing, health checks, failover, and quotas by second, minute, hour, or day. Developers get Mailbox, Sending, and Management APIs, OpenAPI docs, SDKs, the sendmux CLI, MCP tools, and Sendmux Skills. The platform also covers tenant isolation, mailbox-scoped API keys, custom domains, logs, metrics, and usage-based pricing with no per-seat or per-mailbox fees.
    Starting Price: $0.15 per 1000 emails
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