What's new.

We ship fast. This page rounds up what we've shipped, newest first. If you want major releases in your inbox, subscribe here.

v1.4.0 - September 2026

Nitrosend landed in the Cursor Marketplace, agencies got client-owned accounts, and developers got signed event webhooks, plus a guided setup and a way to send before your domain is ready.

• Event webhooks - Add HTTPS endpoints in Settings > Webhooks or at /v1/my/webhooks and get signed, real-time events for transactional deliveries, bounces, complaints, opens, and failures. Signatures follow the Standard Webhooks spec, and Node SDK v0.11 adds verifyWebhook(). See the webhook docs.
• Cursor Marketplace plugin - Nitrosend is an official plugin in the Cursor Marketplace, live since September 18. Run /add-plugin nitrosend or click Add to Cursor at cursor.com/marketplace/nitrosend, and the agent that writes your code can run your email too. More on the Cursor page.
• Nitrosend for agencies and platforms - Launched September 10. Create a client account from the Clients page or the partner API, let your agent build the Brand Kit, welcome flow, and first drafts, then invite the owner. The client owns the account and picks a paid plan, and you keep a revocable seat. See Nitrosend for agencies.
• Send before your domain is ready - Start on a Nitrosend-hosted address while your own domain is being set up. When you add your domain, DNS records show the exact host your registrar expects (like @ or send), and setup works with a DMARC record you already publish.
• Guided setup - New accounts get a four-step, full-screen setup: Brand Kit, sending address, contacts, and connecting your AI agent. Once it knows your audience size, setup shows how far one send goes on your plan, and your agent can ask for the same answer.
• Open and click tracking controls - Turn open tracking and click tracking on or off per brand in Brand > Sender, or through the brands API, so each brand can match its own privacy stance. Links in transactional email, like password resets and sign-in links, open straight in your app.
• More brands on every plan - Free now includes 3 brands and 1 custom sending domain, Pro 5 brands and 3 domains (up from 1 each), and Ultra 10 brands and 10 domains (up from 5 and 3). Enterprise stays unlimited. Details on the pricing page.
• Upgrades and top-ups from your agent - Your agent can prepare a plan upgrade or a prepaid balance top-up through nitro_manage_billing, the CLI, or the API, and you approve every checkout. Read the Payments for agents guide.
• Review any email from your agent - nitro_review_delivery can now preview a draft subject and HTML straight from your agent, as well as saved campaigns, templates, and flows. In Claude, the campaign review panel shows the rendered email inline, and in ChatGPT you can review, approve, and take a flow live without leaving the chat.
• Safer flow restarts - Restarting a paused flow asks whether to enroll only new contacts or continue current journeys, with waiting emails released gradually. List-triggered flows can also enroll a list's existing members when first published.
• Plus - A tidier Settings and Account layout (old links redirect), new Learning Center lessons on your first campaign and welcome flow, open rates that show how far each campaign lands above or below your brand's baseline, test sends with a real contact's data, currency symbols in price merge tags, and faster contacts, segments, and imports on large lists.

v1.3.0 - August 2026

Nitrosend now installs inside Claude in one click, and the app teaches you how to drive it: the Learning Center went live, the Affiliate Center opened, and campaign review moved inside Claude.

• Claude connector directory - Nitrosend is listed in Claude's connector directory. Search for it under Connectors, connect, and your agent has the full email stack. Existing custom connectors were upgraded to the official listing automatically.
• Claude Code plugin - Live in the plugin marketplace for Claude Code and Cowork, or install from the terminal with /plugin marketplace add nitrosend/claude then /plugin install nitrosend@nitrosend.
• Learning Center - Live at /my/learn: short tutorial videos in setup order, copyable prompts you can run in your agent, answers to the questions customers ask most, an Ask NitroLLM bar, and a shortcut to request a feature or report a bug.
• Affiliate Center - Affiliates get an in-app dashboard at /my/affiliates: referral link, traffic and earnings, and downloadable content to share. Commission terms are on the affiliate page.
• Campaign review inside Claude - A visual review panel opens in the conversation itself via MCP Apps, so you can approve a campaign without leaving Claude.
• Prepaid balance and contact enrichment - Add funds to a prepaid balance and spend it on paid actions, starting with contact enrichment at 5 cents per contact, with a bulk workflow for whole lists.
• Immutable flow revisions - Flows deliver exactly the revision you reviewed, and a live flow stays active while you edit the next one.
• Inbox contact context - The contact's profile and history appear in a panel beside every inbox thread, so replies come with the full picture.
• Lossless rich-HTML import - Paste or import a real HTML email into the editor and it survives intact.
• Native Shopify billing - Shopify app installs can now pay through Shopify's own billing.

v1.2.0 - July 2026

July was the Agentic Email Marketing launch: a curated template library, a rebuilt editor canvas, integration data as merge fields, and a Product Hunt win to cap it off.

• Agentic Email Marketing - Launched July 16. The full campaign workflow, run end to end by your agent over MCP, became the front door of the product.
• Curated template library - A hand-built library of templates with branded live previews, so a campaign starts from something worth sending.
• Rebuilt editor canvas - Drag-to-reorder sections, image shape presets, and an embedded renderer so the canvas matches what sends.
• Custom merge fields - Integration data, like Shopify fields, is available as typed merge fields in the composer, with coverage shown before you send.
• Poster-grade authoring - Three poster templates, a brand image library, and renderer upgrades including stronger footer contrast.
• Agent Flow Builder demos - The side-by-side series: two frontier models building the same brand flow in real demo runs, using well-known brands like Nike, Ferrari, Apple, and Stripe.
• Animated WebP - Animated WebP images keep their motion through CDN image optimization.
• Sandbox test sends - Paid accounts get sandbox test sends for safe end-to-end checks before anything reaches a real audience.
• Product Hunt Vercel Day win - We launched on Product Hunt on July 16 and won Vercel Day, announced July 23.

v1.1.0 - June 2026

This release makes audience work faster and safer: Mailchimp migration, a stronger segment builder, better contact visibility, and clearer progress for long-running jobs.

• Mailchimp audience import - Connect Mailchimp with OAuth, import audiences and members into Nitrosend lists and contacts, preserve merge-field/source metadata, and keep consent conservative: only Mailchimp subscribed members become email-subscribed in Nitrosend.
• New segment and filter builder - Contacts, segments, saved views, flow split conditions, and activity filters now share one filter system. Build audiences from profile fields, custom fields, list membership, tags, engagement, deliverability, and event history without each screen behaving differently.
• Better saved views and segment counts - Save contact-table views for operational work, turn durable audience rules into segments, and see refreshed segment counts before you send.
• Contact activity drawer - Review a contact's sends, opens, clicks, unsubscribes, bounces, complaints, list changes, and custom events in one timeline before targeting them again.
• Live progress everywhere it matters - CSV imports and integration syncs now report progress through the same real-time progress tray, with clearer stages and status.
• Sending activity and view in browser - The sending log is easier to inspect across campaigns, flows, transactional messages, and tests, and sent emails can expose a stable browser snapshot of what went out.
• Quieter flow alerts - A suppressed recipient no longer sets off a flow failure alert, so flow alerts only flag what needs your attention.
• In-app AI chat quality - The app chat now routes to a stronger model for higher-quality product help and email work.

v1.0.0 - June 2026

Nitrosend left beta on June 1, the biggest month we've shipped. Multi-brand landed for agencies, the analytics got a lot deeper, and sent emails now match what you build in the editor.

• Out of beta - Nitrosend is generally available. Same usage-based model: unlimited contacts, no dashboard required.
• Multi-brand for agencies - Run up to five brands on Ultra (unlimited on Enterprise) from one login and one agent connection, with a cross-brand dashboard and a per-client Brand Kit (colors, fonts, logo, voice, and AI memory) your agent uses automatically.
• Live in Codex - The official Nitrosend integration for OpenAI's Codex CLI. One line of remote MCP and your email stack sits right next to your code, so the agent that ships your features can wire the emails that go with them.
• Deeper analytics, with an AI insight - The Activity dashboard now lays out sends, opens, clicks, and engagement (opens deduplicated and counting Gmail and Yahoo proxy opens), and your weekly digest carries an AI-written insight with a recommended next step.
• Live engagement scoring - Every contact is automatically scored into tiers (engaged, warm, cooling, dormant, never) with five ready-made segments: Champions, Loyal, At-Risk, Dormant, and New. Available in the grid, in segments, and to your agent.
• Customizable contacts grid & bigger imports - The contacts table is now a configurable grid with a field catalog, column manager, and saved views you can turn into segments. CSV imports take much larger files, with a destination list up front and a live progress tray.
• Exclude lists & segments on send - Hold back warmup and suppression lists by excluding any list or segment from a campaign's recipients, applied across every send path including your AI agent.
• Flow template library - Start automations from a gallery of 17 starter flows (password reset, shipping notification, back-in-stock, and more) instead of a blank canvas.
• Raw HTML transactional - Send fully custom HTML transactional email by passing an html field to POST /v1/my/messages, and preview exactly how any message was composed from the Activity log.
• Email that renders as designed - Sent emails now match the editor canvas across every section: colors, padding, spacing, alignment, and 2x retina images all survive the trip to the inbox.
• Inbox placement & smarter auto-pause - Better inbox placement for mail sent from managed domains, and flows that pause themselves to protect your sender reputation when deliverability needs your attention, with soft-bounce handling and email-typo correction built in.
• Updated pricing - Ultra now includes 125,000 emails per month and up to five brands, the Free plan gives 8,000 emails to start then 500 per month, dedicated sending IPs are a $50/IP/month add-on, and new Enterprise tiers scale to 10M per month.

v0.4.0 - May 2026

The last beta release before we went GA in June.

• Team accounts - Invite teammates and switch between every account you belong to from one login. Invites work from an email invite, signup, password reset, or OAuth.
• HubSpot CRM sync - Connect HubSpot with one-click OAuth to import your contacts and lists. New and deleted HubSpot contacts then sync over automatically via webhooks.
• In the ChatGPT App Store - Nitrosend is now an official ChatGPT app. Search for it, connect once, and sign in. No API key or developer mode.
• One-click domain setup - Verify your sending domain through a guided flow that writes the DNS for you, with live verification status and the manual DNS wizard still there as a fallback.
• Accurate domain status - A domain shows as verified only once it's ready to send, and a tracking domain only once HTTPS is live, so green means the domain is ready.
• Per-user digests - Automatic daily, weekly, and monthly digests summarize new subscribers, sends, and deliverability, delivered to your inbox at 9am local time.
• Send-to-all safety rails - Sending to your whole list now takes an explicit All Contacts audience and a confirmation step (including over MCP), so you can't blast everyone by accident.
• Agent-first onboarding - Setup opens straight on the agent-connection step with a copy-paste prompt, and you can collect contacts from signup forms on your own site.
• Plus - Flows that move each contact through independently, attach an existing Mailgun domain, Twilio SMS delivery status, and a {{ contact.website }} merge tag.

v0.3.0 - April 2026

Public API stability pass and the first cohort of shared MCP improvements.

• OpenAPI 3.1 spec - Full public REST API documented at api.nitrosend.com/openapi.yaml.
• Node SDK v0.1.0 - @nitrosend/sdk published on npm. Strongly typed client for all public endpoints.
• MCP tool: nitro_get_insights - Delivery insights, open and click rates, and per-campaign analytics exposed to agents.
• Brand Kit auto-scraping - Point Nitrosend at a URL and it extracts colors, fonts, and logo in a single MCP tool call.
• Unlimited contacts - Every plan now includes unlimited contacts. You only pay for sends and compute.

v0.2.0 - March 2026

Nitrosend is live and onboarding the first wave of users who want to experience AI-native email marketing.

• MCP server - Connect Nitrosend to Claude Code, ChatGPT, Cursor, Codex, Gemini, Windsurf, VS Code, and Zed via MCP. Full campaign lifecycle from your AI agent.
• REST API - Complete API for contacts, campaigns, templates, segments, and sending. Full docs at docs.nitrosend.com.
• AI email composition - AI-powered copywriting and design. Component-based email format that renders to pixel-perfect HTML.
• BYO mode - Use your own infrastructure (AWS SES, Resend, Postmark, Mailgun, SendGrid) and AI keys while Nitrosend powers campaign composition.
• Campaigns & automations - Send one-off campaigns or build multi-step automation flows. Segment your audience with flexible rules.
• Deliverability - SPF, DKIM, DMARC, and custom domain verification. Domain warmup guidance baked in.

v0.1.0 - February 2026

The first version of Nitrosend, built with early design partners to prove the MCP-first architecture.

• MCP-first architecture - Every capability exposed as an MCP tool and REST endpoint from day one. No dashboard-first design.
• Component model - Email template format designed for AI composition. Structured JSON that renders to email-safe HTML.
• Email Marketing Skill launched - emailmarketingskill.com. 55,000 words, 908 sources, 19 industry playbooks. Available as a Claude skill.
• Brand Kit memory - Accounts remember brand context across every agent session. No re-prompting design details.

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