SendGrid Inbound Parse: Setup, Payload, and Limits
How SendGrid Inbound Parse works: the MX record, the multipart payload, raw mode, the 30 MB cap, and 3-day retries. Plus when an agent inbox fits better.
Carlyemail
24 posts
Agent Identity: What It Is and How AI Agents Get One
Agent identity is how a system knows which AI agent it's dealing with, what it may do, and who answers for it. The 2026 players, standards, and setup.
AgentMail Pricing 2026: Plans, Send Caps and Add-ons
AgentMail pricing, October 2026: Free, Developer at $20 and Startup at $200, the daily and 5-minute send caps, $2 add-ons, yearly discount, and real costs.
Email OTP for AI Agents: Read Codes Without Temp Mail
Your AI agent hit 'we emailed you a code'. Why temp-mail APIs leak and get blocked, and how to catch the email OTP in its own inbox, in Python.
Amazon SES Pricing 2026: Plans, Inbound and Hidden Costs
Amazon SES pricing, October 2026: $0.10 per 1,000 à la carte, $0.16 on the new default Essentials plan, plus inbound, dedicated IP, VDM and free tier costs.
9 Best Email APIs in 2026 (Free Tiers Compared)
The 9 best email APIs for developers in 2026: free tiers, real prices, and which can receive and reply as well as send transactional email.
CarlyEmail vs AgentMail: 2.5x the Inboxes for $20
AgentMail's $20 plan gets you 10 inboxes and a 1,000-a-day send cap. CarlyEmail's gets you 25 and no daily cap. Every tier, the API, and how to switch.
Catch-All Email Address: What It Is and How to Set It Up
A catch-all email address gets mail sent to addresses at your domain that don't exist. Setup for Google Workspace, Microsoft 365, Cloudflare, and the risks.
Claude Agent SDK Email: Give Your Agent a Real Inbox
Give a Claude Agent SDK agent its own inbox: connect CarlyEmail's MCP server, wake it on new mail, one session per thread. TypeScript and Python.
Email MCP Servers: 14 Compared, From Gmail to AgentMail
Every email MCP server we could verify in October 2026: which act in your mailbox, which give an agent its own inbox, which only send, and how each signs in.
Email to Webhook: Turn Incoming Email Into an HTTP Event
Turn incoming email into a webhook: SendGrid, Mailgun, Postmark, SES, Resend, Cloudflare and Zapier compared, plus a signed handler that replies in-thread.
Gmail API Limits 2026: Quotas, Sending Caps, Pricing
Gmail API limits changed May 1, 2026: 6,000 quota units per user a minute, 100 per send. Daily send caps, real costs, and why agent accounts get flagged.
7 Best Mailgun Alternatives in 2026 (Prices Compared)
Leaving Mailgun over overage you can't switch off, 1-day logs or a sandboxed free plan? 7 Mailgun alternatives compared on price, retention and inbound.
Mailgun Pricing 2026: Free Tier, Plans and Overages
Mailgun pricing, October 2026: the 100-a-day free tier, Basic at $15, Foundation at $35, Scale from $90, overage per 1,000, dedicated IPs and add-ons.
OpenClaw Email Setup: Your Gmail or an Inbox of Its Own
OpenClaw email setup, two ways: connect your Gmail with the gog skill and Pub/Sub, or give it its own CarlyEmail inbox. Step by step, and which is safer.
7 Best Resend Alternatives in 2026 (Prices Compared)
Leaving Resend? 7 alternatives compared on price, React Email support and receiving mail, with Loops vs Resend, Plunk, Postmark and CarlyEmail.
Resend Pricing 2026: Free Tier, Plans and Real Costs
Resend pricing, October 2026: the free tier and its 100/day cap, Pro from $20, Scale from $90, overages, dedicated IPs, and why inbound mail counts.
How to Send Email from Python (and Read the Reply)
Send email from Python with smtplib and a Gmail app password: HTML, attachments, port 465 vs 587, auth errors. Then read and answer replies with an API.
8 Best SendGrid Alternatives in 2026 (Prices Compared)
SendGrid dropped its free plan and support complaints keep piling up. 8 SendGrid alternatives compared on free tiers, real prices, and receiving mail.
SendGrid Pricing 2026: Plans, Free Trial and Real Costs
SendGrid now starts with a 60-day trial, then $19.95/mo for 50,000 emails. Every Email API and Marketing plan, overages, IP add-ons, and costs at 10k-100k.
SendGrid vs Mailgun 2026: Price, Inbound, Logs, Support
SendGrid vs Mailgun, October 2026: cost at 10k, 50k and 100k emails, deliverability tools, Inbound Parse vs Routes, logs, support, and Amazon SES.
Introducing CarlyEmail: Give Any AI Agent an Inbox
CarlyEmail gives your agent a real email address, threaded replies, attachments, and a signed event when mail arrives. Use it over MCP, REST, or an SDK.
7 Best AgentMail Alternatives in 2026
AgentMail gives AI agents their own inboxes via API. Here are 7 alternatives, from inbox APIs to agents that arrive with an address already attached.
Email API for AI Agents: Six Builds, One Inbox
Give an agent a real address in one call, with threading, attachments, webhooks and per-tenant pods. Six common agent email builds and how to ship each.