# Sendly — Email API with AI for transactional and marketing > Email API for transactional, marketing and workflow email, with an AI assistant and MCP server. Speaks the Resend, SendGrid, Postmark and Mailgun APIs. Canonical page: https://sendly.now # Email, _well_ delivered. Transactional sends, marketing campaigns and visual workflows in one workspace, on separate sending identities — behind one API that is safe to hand an agent: scoped keys, an MCP surface, and phishing screening on the way out. [Start sending free](https://app.sendly.now/auth/signup)[Read the docs](https://docs.sendly.now) [Add to Claude](https://claude.ai/directory/e2cba79c-6e59-4784-af25-93ce631ad368 "Add Sendly to Claude") [Claude Code](https://docs.sendly.now/agent-setup/claude-code "Claude Code")[Codex](https://docs.sendly.now/agent-setup/codex "Codex")[Cursor](https://docs.sendly.now/agent-setup/cursor "Cursor")[OpenCode](https://docs.sendly.now/agent-setup/opencode "OpenCode") § 03AI Workflows ## Describe your campaign. _We'll wire it._ Tell Sendly what you want to send and when. Drip sequences, behavioral triggers, conditional branches — built by describing them. Drag a node to tweak; deploy when it's right. Sendly AI Workflow builder Example scenarios 1. trigger New sign-up 2. send "Welcome to Acme" 3. wait 3 days 4. condition Setup done? 5. - Yes send "Try Pro, on us" - No send "Quick setup tips" Sendly · Workflow Builder · v1 § 04AI Integrations ## Bring _your_ AI. Sendly speaks Model Context Protocol — the open standard for AI tool use. Connect Claude, Cursor or any MCP-aware agent, over OAuth or with a secret key. You choose what it may do, one permission at a time: the ones that cannot be undone — sending mail, revoking API keys — arrive unchecked, behind a warning. 01_Read your account_ Ask which sending domains are verified, or what your open rate was this week. 02_Do the work_ Have Cursor tidy your contacts, cut a new segment, or draft the next campaign. 03_Send, once you say so_ Sending is a permission you tick yourself. Withdraw it and the agent is refused on its next call. Connect in one line `claude mcp add --transport http sendly https://app.sendly.now/api/mcp` Sign in, approve the permissions you want to grant, and revoke them any time from your settings. Sendly MCP server § 05The Platform ## One dashboard, _everything_ you need. § 06The Problem ## Most email tools weren't built for _agents._ / Agents Scoped Safe to hand an assistant Give an agent an MCP connection and a key scoped to exactly what it may do. Outbound content is screened for phishing, and a project that trips the threshold is cut off automatically rather than after the complaints arrive. / Pricing 0 limits Pay per email, never per contact Store millions of contacts at no cost. Pay only for messages that actually leave the queue. / Reliability 4 regions Multi-region by default Sends route through the AWS SES region closest to your project. Automatic failover, idempotency keys, no overage surprises. § 07Capabilities ## Everything you need. _Nothing you don't._ /W 01 Workflow Automation Visual workflows that branch on opens, clicks, and custom events. Drag, drop, ship. /S 02 Dynamic Segments Filter your audience on any property. Segments update in real time as contacts change. /C 03 Campaign Management Schedule, A/B test, and track marketing broadcasts alongside transactional sends. /A 04 Analytics Delivery, opens, clicks, bounces. Per domain, per tag, per template — drilled all the way down. /I 05 Inbound Email Receive at a verified address, route to a webhook, and treat replies like any other event. /D 06 Sending Identities Separate identities for transactional and marketing mail, suggested when you add a domain. Each gets its own DKIM, SPF and DMARC — so a campaign's complaints never reach the reputation your password resets go out on. § 08Alternatives ## Replace your email stack. 001Resend[Resend vs Sendly](/vs/resend) 002SendGrid[SendGrid vs Sendly](/vs/sendgrid) 003Mailchimp[Mailchimp vs Sendly](/vs/mailchimp) 004Customer.io[Customer.io vs Sendly](/vs/customer-io) 005Mailgun[Mailgun vs Sendly](/vs/mailgun) Already on Resend, SendGrid, Postmark, Mailgun, or Plunk? Sendly speaks their transactional-send APIs — keep the SDK you already run, swap the base URL and the key. [Migration guides](https://docs.sendly.now/migrate) § 09Refer & Earn ## Earn 30% for referring Sendly Share your link and earn 30% of what everyone you refer pays, for their first 12 months. 01 ### Share your link Every signed-in Sendly account already has one. Nothing to apply for, nothing to activate. 02 ### They sign up and subscribe Your link is credited when they create an account and start paying for what they send. 03 ### You earn 30% for 12 months 30% of every invoice they pay in their first 12 months, renewals included. [See how it works →](/partners) § 10Pricing ## Simple, _predictable_ pricing. No per-contact fees, no monthly fee and no plan tiers to outgrow — start free, then pay $1.00 per 1,000 emails you actually send, less as you send more. Free $0 / month · forever Everything you need to get started. No credit card required. ✓5,000 emails / month ✓Transactional, campaigns & workflows ✓Full REST API, SDKs & webhooks ✓Small "Sent with Sendly" footer on sent email [Get started free](https://app.sendly.now/auth/signup) Pay as you go $1.00 / 1,000 emails Volume pricing that drops as you send more. No monthly fee and no plan to outgrow. ✓$1.00 per 1,000 emails up to 50,000 ✓$0.70 per 1,000 above 50,000 ✓$0.50 per 1,000 above 250,000 ✓"Sent with Sendly" footer removed ✓Set your own limit per category ✓Billed in your own currency [Start sending →](https://app.sendly.now/auth/signup) Custom Let's talk tailored to your volume High-volume or regulated sending that needs limits set by a human. ✓Everything in Pay as you go ✓Custom sending limits ✓Higher daily throughput ✓Direct support from the team [Contact us →](mailto:support@sendly.now) § 11Trust ## Postmarked in _Halifax._ / Deliverability ### Every send, tracked _to the tick._ Transactional or broadcast, each message is stamped the moment it lands — delivered, opened, clicked — so you always know it arrived. Four SES regions and managed suppression lists keep you out of the spam folder. DELIVERED142 ms FROM Sendly · Halifax NS support@sendly.now Welcome to Acme, Jane. Your account is ready. Here’s what to do next… Set up your domain → Postmarked · Halifax NSvia Sendly REGIONS · EU + US Privacy first EU-hosted by default, US on request. GDPR-aligned data handling, and your recipient data is never sold or shared with advertisers. CREW · INDEPENDENT Indie, by design An email platform built by a small team in Halifax. We answer our own support email. No carve-up by product managers. INFRASTRUCTURE · MULTI-REGION Built to last Four AWS SES regions with automatic failover, suppression lists managed for you, idempotency keys baked into every write endpoint. [Read our trust policy →](/privacy) ## Questions, answered. What is Sendly? Sendly is an email platform for developers: one REST API for transactional email, marketing campaigns and visual automation workflows, built on AWS SES, with contacts, segments, templates, webhooks and an event stream in the same account. Can I move from Resend, SendGrid, Postmark or Mailgun without rewriting my code? For transactional sends, yes. Sendly's API also accepts the send requests of Resend, SendGrid, Postmark, Mailgun and Plunk, so an existing SDK keeps working once you change its base URL and API key. Each migration guide names the one setting to change. Is there a free tier? Yes: 5,000 emails per calendar month, with no card required and the full API, SDKs and webhooks included. Email sent on the free tier carries a small "Sent with Sendly" footer. Above that you pay per email sent, with no monthly fee. Can AI agents use Sendly? Yes. Sendly runs an MCP server at https://app.sendly.now/api/mcp. An MCP client such as Claude or ChatGPT connects over OAuth, and you choose the permissions it gets when you approve it. Where are the docs and the API reference? On docs.sendly.now, which also publishes llms.txt and llms-full.txt for AI tools and the OpenAPI document the official TypeScript and Python SDKs are generated from. ## Start sending in _5 minutes._ A free account, a verified domain, and three lines of code. Your first email goes out before this page finishes loading. [Create free account →](https://app.sendly.now/auth/signup)[Read the docs](https://docs.sendly.now)