llms.txt
# Banger
> Banger is AI email marketing you run from ChatGPT, Claude or any AI app: campaigns, automated Journeys, product emails and customer support inboxes, all on your own domain. It is one email system for your company, operated by the AI assistant or agent you already use (Claude, ChatGPT, Codex, Cursor, Grok, or your own) through a remote MCP server and a REST API, with a web app for your team. Banger is made by BangerMail Inc.
## What Banger is
- One system for company email: hosted mailboxes on your own domain (or a Banger-hosted starter address), product and transactional email sent from your software, Broadcasts (one-off sends to a list or segment), Journeys (automated lifecycle flows, from a one-step welcome to multi-branch sequences), contacts, lists, segments, signup forms, templates and on-brand email designs, sending domains and deliverability, Approvals, and Logs.
- Three surfaces over the same workspace state: the MCP server for AI agents (https://api.bangermail.com/mcp), the REST API for code (https://api.bangermail.com), and the web app for people (https://app.bangermail.com/).
- Who it is for: businesses that want their AI assistant to set up and run their company email, on their own domain.
- Setup: sign up free at https://app.bangermail.com/. Onboarding creates a Banger-hosted mailbox and proves a real send-and-receive round trip before it asks about a domain; adding your own domain gives you the exact DNS records and a verification the agent can run.
- Company: BangerMail Inc. Contact: support@team.bangermail.com. Security reports: security@team.bangermail.com.
## Connect an AI assistant (MCP)
- MCP server URL: https://api.bangermail.com/mcp
- Transport: Streamable HTTP
- Auth: OAuth 2.1 with PKCE (S256) and dynamic client registration. Protected resource metadata: https://api.bangermail.com/.well-known/oauth-protected-resource/mcp. Authorization server metadata: https://api.bangermail.com/.well-known/oauth-authorization-server. Unauthenticated requests get 401 with a WWW-Authenticate header pointing at the resource metadata.
- Clients that cannot do OAuth can send a workspace API key as a Bearer token to the same endpoint.
- Registry: listed in the official MCP Registry as com.bangermail/banger. Plugin manifests for Claude, Codex, and Grok: https://github.com/bangermail/banger-plugin
- Machine-readable server description: https://bangermail.com/.well-known/mcp.json
- Full guide: https://bangermail.com/banger-mcp/
### Claude
1. Choose Add to Claude. Claude opens with Banger already filled in.
2. Choose Continue, then Connect.
3. Sign in to Banger and approve your workspace.
One-click link: https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Banger&connectorUrl=https%3A%2F%2Fapi.bangermail.com%2Fmcp
Or add it by hand in Customize → Connectors with the URL above. Team and Enterprise owners add it for the organization first.
### Claude Code
1. Add Banger as a persistent user-scope server.
2. Log in once; the token is stored by Claude Code.
```
claude plugin marketplace add bangermail/banger-plugin
claude plugin install banger@banger
```
Without the plugin: claude mcp add --transport http --scope user banger https://api.bangermail.com/mcp, then claude mcp login banger.
### ChatGPT
1. Turn on Developer mode in Settings → Security and login.
2. Open Plugins, select +, name it Banger and paste the MCP URL.
3. Authorize Banger for your workspace.
Once Banger is listed in the ChatGPT directory, it will be one Connect click.
### Codex
1. Add the server; Codex detects OAuth automatically.
2. Log in; the browser opens the Banger authorization page.
```
codex mcp add banger --url https://api.bangermail.com/mcp
codex mcp login banger
```
Codex CLI, the Codex app, and its IDE extensions share one configuration, so Banger appears in all of them.
### Grok
1. On grok.com open Connectors, choose New Connector, then Custom.
2. Paste the MCP URL as the server URL.
3. Approve the authorization page when Grok opens it.
```
grok plugin install bangermail/banger-plugin --trust
```
The command is for Grok Build; the connector steps are for the Grok app.
### Cursor and any other MCP client
1. Add a remote Streamable HTTP server at the MCP URL.
2. Pick OAuth. Discovery, registration, and PKCE need no manual setup.
3. Approve the authorization page and choose the workspace.
Cursor: add a server in Cursor's MCP settings (mcp.json) with the URL below; Cursor handles the OAuth sign-in.
```json
{
"mcpServers": {
"banger": {
"url": "https://api.bangermail.com/mcp"
}
}
}
```
Clients that cannot do OAuth can use a workspace API key created in Banger under Settings.
## REST API
- Base URL: https://api.bangermail.com
- Auth: `Authorization: Bearer <workspace API key>`. Create keys in the Banger app under Settings → Developers → Manage API keys; choose the scopes the key needs. Keys start with `bgr_` and are shown once.
- Reference with schemas and curl examples: https://bangermail.com/docs/api/
- OpenAPI 3.1 description (same operations): https://bangermail.com/openapi.json
- API catalog (RFC 9727): https://bangermail.com/.well-known/api-catalog
- Responses wrap results in `{ data }` and errors in `{ error: { code, message } }`. Send `Idempotency-Key` where an operation lists it.
## SMTP
- Host submit.bangermail.com, port 465 (TLS) or 587 (STARTTLS); 2465 and 2587 where those are blocked.
- Username `banger`; password a workspace API key with the `mail:send` scope. Login is offered only after TLS.
- The From address must be on a hostname with an active Product lane. Every message appears in Logs.
- Guide with settings, examples and reply codes: https://bangermail.com/docs/smtp/
## Pricing
US dollars, from https://bangermail.com/pricing/. Premium is billed yearly, or month to month for 20% more. Past what it includes, you pay per use, never more than your monthly limit. Every feature on every plan, Free included.
- Free: $0. 500 emails a month, up to 100 a day; 256 MB storage; No watermarks; 7-day history; Community support.
- Premium: $20/month billed yearly ($240/year), or $24 month to month. 50,000 emails a month, no daily cap; 50 GB storage; Unlimited history; Email support.
- Enterprise: from $2,000/month billed yearly, or $2,400 month to month; talk to us at https://bangermail.com/demo/. From 2,000,000 emails a month; 2 TB storage; Dedicated IPs for sending; Slack support and 99.9% SLA; Pay by invoice, with a DPA.
- Past what Premium includes: $0.40 per 1,000 emails, $0.10 per GB stored, a month. Usage is billed monthly. Never more than the workspace's spending limit: $100 a month unless changed; at 0, everything stops at what Premium includes.
Free is free forever. No credit card. Upgrade only when you send or store more. Every email counts the same: marketing, product and mailbox. On Free, sends beyond the daily cap go out the next day. On Premium, use past what is included is billed monthly at the rates above, never more than your spending limit; at the limit, sending stops until the next month or until you raise it. We may pause sending that looks like spam or abuse.
## Safety model
- Scoped OAuth: the authorization page shows the exact scope set, capped by the person's role, for one workspace. Scopes: `mail:read`, `mail:write`, `mail:send`, `contacts:read`, `contacts:write`, `campaigns:read`, `campaigns:write`, `campaigns:send`, `automation:read`, `automation:execute`, `connections:read`, `connections:use`, `connections:admin`, `workspace:admin`. Grants can be revoked in Banger under Settings → Agents.
- Human Approvals: Banger always asks a person to approve certain actions, such as activating a Journey or publishing shared content. Sending, launching a Broadcast, and other governed actions follow the workspace approval policy: where it requires review, the agent proposes and a person approves in Banger. Agents and workspace API keys cannot approve.
- Workspace-wide suppression: every Broadcast and Journey email carries one-click unsubscribe (RFC 8058). Unsubscribes, hard bounces, and spam complaints are suppressed across the whole workspace, and later sends to those addresses are refused.
- Boundaries and audit: workspaces are company boundaries and products are strict email boundaries inside them. Governed mutations use idempotency keys, and every action lands in Logs.
- Data handling: https://bangermail.com/trust/. Sending rules: https://bangermail.com/acceptable-use/.
## Key pages
- [Banger: email your AI can run](https://bangermail.com/): Run Mailboxes, Broadcasts, and Journeys with your AI agent.
- [Email for AI agents, on your own domain.](https://bangermail.com/email-for-ai-agents/): Give your AI agent an inbox, transactional email and marketing automation on your domain, with human Approvals.
- [Banger MCP](https://bangermail.com/banger-mcp/): Connect Claude, ChatGPT, Codex, Grok, or any MCP client to your company email with OAuth you approve.
- [Banger documentation](https://bangermail.com/docs/): Build with the Banger API and connect AI assistants through MCP.
- [Banger API reference](https://bangermail.com/docs/api/): Banger API endpoints, authentication, request and response schemas, and curl examples for workspace resources and public signup forms.
- [Send email over SMTP](https://bangermail.com/docs/smtp/): Send from Supabase Auth, WordPress or any app that speaks SMTP through submit.bangermail.com, with a Banger API key as the password.
- [Banger Mail Pricing](https://bangermail.com/pricing/): Workspace pricing for Banger Mail: free to start, paid plans from $20 a month, and no seat or contact fees.
- [How Banger handles your mail](https://bangermail.com/trust/): What Banger stores, where it lives, who can read it, and what leaves Banger's systems.
- [Banger Acceptable Use & Anti-Spam Policy](https://bangermail.com/acceptable-use/): What you and your AI agents may and may not send with Banger: consent, unsubscribes, sender identity, prohibited content, and enforcement.
- [Banger Status](https://bangermail.com/status/): Live reachability of Banger's API, MCP server, web app, and sign-in, checked every minute.
- [Banger Support](https://bangermail.com/support/): How to get help with Banger, the Banger app for ChatGPT and Claude, and your account.
## Features
- [Banger Features: Email Marketing Your AI Runs](https://bangermail.com/features/): Marketing automation, newsletters, transactional email, a shared inbox, A/B tests, translation and signup forms. Each one runs from ChatGPT, Claude or any AI app.
- [Marketing Automation You Run from ChatGPT or Claude | Banger](https://bangermail.com/features/marketing-automation/): Banger Journeys send each person the right email when they sign up, start a trial, leave a cart or go quiet. Ask ChatGPT or Claude to build the flow, then turn it on.
- [Email Newsletter Software You Run from ChatGPT or Claude | Banger](https://bangermail.com/features/newsletters/): Banger Broadcasts send newsletters, launches and sales to a list or segment, with A/B tests and results that count real readers. Ask ChatGPT or Claude to write it.
- [Transactional Email API You Set Up with Your AI | Banger](https://bangermail.com/features/transactional-email/): Send receipts, password resets and sign-in codes from your app through the Banger API or SMTP, in your brand, from your domain. Your AI sets up each email.
- [Shared Inbox for Customer Support, Run by Your AI | Banger](https://bangermail.com/features/shared-inbox/): Banger Mailboxes give your team and your AI one shared inbox on your own domain. Your AI sorts the mail, drafts replies and assigns them. Free and unlimited.
- [Email A/B Testing Your AI Sets Up and Reads | Banger](https://bangermail.com/features/ab-testing/): Test 2 to 4 subject lines, senders, designs or whole Journeys. Banger sends the winner once it leads with 95% confidence, and counts real readers only.
- [Automatic Email Translation for Every Customer | Banger](https://bangermail.com/features/email-translation/): Write each email once. Banger translates it with AI into each customer’s language, on every plan, and nobody ever gets an email in the wrong language.
- [Email Signup Forms: Popups, Bars and Hosted Pages | Banger](https://bangermail.com/features/signup-forms/): Popups, bars, slide-ins, inline forms or a hosted page that add people to your list, with email confirmation and consent recorded. Your AI builds them in your brand.
## Company
- [About Banger Mail](https://bangermail.com/about/): Meet the team behind Banger, company email your AI runs, and learn why we are building it for founders and builders.
- [Careers at Banger Mail](https://bangermail.com/careers/): Learn how to join the Banger Mail talent pool and help build agent-operated company email.
- [Book a Banger Mail demo](https://bangermail.com/demo/): Thirty minutes with a founder: see Banger on your own inbox and leave with your workspace set up.
## Guides and tools
- [Get started with Banger: connect your AI and send your first email](https://bangermail.com/getting-started/): Start for free, connect ChatGPT, Claude, Grok, Hermes, or OpenClaw, get a working mailbox right away, add your domain, and send your first welcome email.
- [Free email domain checker: SPF, DKIM, DMARC, MX, and blocklists](https://bangermail.com/tools/email-domain-checker/): Check any domain’s email setup in seconds: MX records, SPF, DKIM, DMARC, reverse DNS, and spam blocklist status, with plain-English fixes for what’s missing.
## Comparisons
- [Banger vs Resend, Mailchimp, Klaviyo and other email tools](https://bangermail.com/compare/): How Banger, the email platform your AI runs, compares with email APIs, newsletter tools, lifecycle platforms and agent inboxes, and what it adds.
- [Banger vs Loops: lifecycle email your AI runs](https://bangermail.com/compare/loops/): Compare Banger and Loops for SaaS lifecycle email, MCP, campaigns, transactional sending, mailboxes, approvals and pricing.
- [Banger vs Mailgun: email API, inboxes and automation](https://bangermail.com/compare/mailgun/): Compare Banger and Mailgun for transactional email, inbound routing, MCP servers, mailboxes, automation, human approvals and pricing.
- [Banger vs Resend: the Resend alternative your AI runs](https://bangermail.com/compare/resend/): Banger vs Resend compared: transactional email API, MCP servers, broadcasts, automations, real mailboxes, A/B tests and pricing. How Banger replaces Resend and what it adds.
- [Banger vs Postmark: the Postmark alternative your AI runs](https://bangermail.com/compare/postmark/): Banger vs Postmark compared: transactional email API, MCP servers, inbound email, broadcasts, automated sequences and pricing. How Banger replaces Postmark and what it adds.
- [Banger vs SendGrid: the SendGrid alternative your AI runs](https://bangermail.com/compare/sendgrid/): Banger vs Twilio SendGrid compared: email API, marketing campaigns, automation, MCP access, mailboxes, free plans and pricing. How Banger replaces SendGrid.
- [Banger vs Mailchimp: a Mailchimp alternative your AI runs](https://bangermail.com/compare/mailchimp/): Banger vs Mailchimp compared: AI agent access, newsletters, automations, transactional email, mailboxes and contact-based vs email-based pricing.
- [Banger vs Klaviyo: the Klaviyo alternative your AI runs](https://bangermail.com/compare/klaviyo/): Banger vs Klaviyo compared: campaigns, automated flows, transactional email, MCP servers, mailboxes and profile-based vs email-based pricing. How Banger replaces Klaviyo for email.
- [Banger vs Customer.io: the Customer.io alternative your AI runs](https://bangermail.com/compare/customer-io/): Banger vs Customer.io compared: MCP access, lifecycle Journeys, broadcasts, transactional email, mailboxes and pricing.
- [Banger vs AgentMail: email for AI agents compared](https://bangermail.com/compare/agentmail/): Banger vs AgentMail compared: both are email for AI agents. Agent inboxes vs a full company email platform with MCP, Journeys, broadcasts and human review.
## Blog
- [Banger Mail Blog](https://bangermail.com/blog/): Launch notes, product updates, and practical writing on company email, deliverability, and AI agents.
- [AgentMail vs Resend vs Banger: which email platform should your AI use?](https://bangermail.com/blog/agentmail-vs-resend/): Compare AgentMail, Resend and Banger for agent inboxes, sending APIs, marketing automation, MCP access, human approvals and pricing.
- [Best email API for AI agents in 2026](https://bangermail.com/blog/best-email-api-for-ai-agents/): Compare Banger, AgentMail, Resend and Postmark for agent inboxes, sending, MCP, automation, approvals and price.
- [Claude email marketing: campaigns, newsletters and automated follow-ups](https://bangermail.com/blog/claude-email-marketing/): Use Claude with Banger to build welcome emails, newsletters, segments and win-back flows, with human approvals and clear sending costs.
- [Cheapest transactional email APIs in 2026: pricing at 10k to 1M emails](https://bangermail.com/blog/cheapest-transactional-email-api/): Compare Banger, Resend, Postmark, SendGrid, Mailgun, SES, Mailtrap and Brevo at four sending volumes, with billing assumptions and sources.
- [Email marketing MCP servers: Banger, Mailchimp, Klaviyo and Customer.io](https://bangermail.com/blog/email-marketing-mcp-server/): Compare official marketing MCP connections, supported campaign tools and review controls, then connect your AI to Banger with OAuth.
- [Lifecycle email tools for SaaS: seven platforms to compare in 2026](https://bangermail.com/blog/lifecycle-email-tools-saas/): Compare Banger, Customer.io, Loops, Klaviyo, Mailchimp, Brevo and Userlist for SaaS onboarding, activation, retention and win-back email.
- [How to send a newsletter from ChatGPT on your own domain](https://bangermail.com/blog/send-newsletter-from-chatgpt/): Connect ChatGPT to Banger, collect or import subscribers, draft a branded newsletter, preview it and send a reviewed Broadcast.
- [Meet Banger](https://bangermail.com/blog/banger-launch/): Welcome emails, newsletters, receipts, and replies. Banger lets your AI run company email so you can win more customers and keep them longer.
- [What is an AI-native email platform?](https://bangermail.com/blog/agent-native-email-platform/): An AI-native email platform lets your AI run mailboxes, transactional email and marketing automation. Compare agent operations, AI features and approvals.
- [Email deliverability basics for a brand-new domain](https://bangermail.com/blog/email-deliverability-new-domain/): Prepare a new domain for responsible sending: authentication, consent, measured rollout, unsubscribe handling, and Banger bounce and complaint thresholds.
- [Email MCP server: run company email from your AI agent](https://bangermail.com/blog/email-mcp-server-ai-agents/): Connect an AI assistant to company email with Banger MCP: domain setup, mailboxes, sending, Journeys, scoped OAuth, and human approvals.
- [How to give an AI agent access to company email safely](https://bangermail.com/blog/give-ai-agent-access-to-email-safely/): Use scoped OAuth, deliberate workspace policy, human Approvals, and delivery checks when an AI agent runs your company email through Banger.
- [How to send company email from ChatGPT with Banger](https://bangermail.com/blog/how-to-send-email-from-chatgpt/): Connect ChatGPT to Banger through MCP, prepare email from your company domain, review gated sends, and check delivery status.
- [How to send company email from Claude with Banger](https://bangermail.com/blog/how-to-send-email-from-claude/): Add the Banger custom connector to Claude, authorize with OAuth, and prepare company email with human review and delivery checks.
- [How to triage company email with an AI agent](https://bangermail.com/blog/how-to-triage-email-with-ai-agents/): Set up Banger Labels & Triage with exact conditions, plain-langu
