All Articles
Email API9 articles

Articles tagged “Email API

9 min read

Resend Automations Review: What It Does Well and Where It Falls Short (2026)

An honest review of Resend Automations, the event-driven email workflow feature launched in April 2026. What it does well, where it falls short, and when you'll outgrow it.

Nik
Nik@nikpolale
ResendEmail AutomationDeveloper ToolsEmail APIReview
18 min read

12 Best Email APIs for AI Agents (2026)

Compare the best email APIs for AI agents, autonomous workflows, MCP tools, and agentic apps. Covers Sequenzy, Resend, Loops, Postmark, Mailgun, SendGrid, Customer.io, Knock, Courier, AWS SES, and more.

Nik
Nik@nikpolale
AI AgentsEmail APIMCPDeveloper ToolsEmail MarketingSaaS
5 min read

Best Email APIs with MCP Support (2026)

Compare email and notification APIs with MCP support for AI agents. Covers Sequenzy, MailerSend, Knock, Novu, and when to use REST APIs instead.

Nik
Nik@nikpolale
MCPEmail APIAI AgentsDeveloper ToolsEmail Marketing
6 min read

12 Best Notification APIs for AI Agents (2026)

Compare notification APIs for AI agents across email, in-app, push, SMS, Slack, and webhooks. Covers Knock, Courier, Novu, Sequenzy, OneSignal, MagicBell, Resend, Postmark, and more.

Nik
Nik@nikpolale
AI AgentsNotificationsEmail APIDeveloper ToolsSaaS
6 min read

10 Best Transactional Email APIs for AI Agents (2026)

Compare the best transactional email APIs for AI agents that send password resets, receipts, alerts, onboarding messages, and product notifications safely.

Nik
Nik@nikpolale
AI AgentsTransactional EmailEmail APIDeveloper ToolsSaaS
5 min read

How to Build an Email Tool for an AI Agent

A practical guide to designing an email-sending tool for AI agents with safe schemas, approval gates, test sends, webhooks, and audit logs.

Nik
Nik@nikpolale
AI AgentsEmail APIMCPDeveloper ToolsAutomation
5 min read

Email API Guardrails for Autonomous AI Agents

The production guardrails every autonomous email agent needs: scopes, approval gates, send caps, audit logs, test sends, suppression lists, and deliverability monitors.

Nik
Nik@nikpolale
AI AgentsEmail APISecurityDeliverabilityAutomation
5 min read

Resend vs Sequenzy for AI Agents: API vs Workflow Platform

Compare Resend and Sequenzy for AI agents. Resend is the cleaner transactional email API; Sequenzy gives agents campaigns, sequences, subscribers, transactional email, and analytics.

Nik
Nik@nikpolale
ResendSequenzyAI AgentsEmail APIDeveloper Tools
24 min read

The 25 Best Transactional Email Services in 2026 (Tested & Compared)

A comprehensive comparison of the best transactional email services available today. We tested 25 platforms across deliverability, API quality, speed, pricing, and developer experience to help you find the right service for your application. Covers Sequenzy, Amazon SES, Postmark, Resend, and SendGrid.

Nik
Nik@nikpolale
Transactional EmailEmail APIDeveloper ToolsGuide