# Envloped > Email infrastructure for the AI agent economy. Native MCP (Model Context Protocol) support, agent-first APIs, and intelligent workflows for agentic systems. The first email platform built specifically for AI agents. Envloped is a developer-first email platform that enables AI agents, autonomous workflows, and human developers to send, manage, and orchestrate transactional email at scale. Unlike legacy email services, Envloped is designed from the ground up for the agentic era: every API endpoint is optimized for machine consumption, the CLI ships as a first-class MCP tool, and multi-agent coordination is built into the core architecture. ## Key Facts - **Founded**: 2024 - **Category**: Email Infrastructure / Developer Tools / AI Agent Platform - **Signing up**: A payment method is required to create an account. There is no card-free plan. Signup is a five-step flow at https://envloped.com/start that picks the products, creates the account, takes a card and starts the subscription; the smallest thing that can be bought is Transactional at $10/mo - **Plans**: Transactional ($10/mo, 20,000 emails included, then prepaid packs — 10,000 emails for $10 at the first tier, falling to $0.70 and $0.40 per 1,000 at higher volume), Marketing ($29/mo, 5,000 active contacts included, then $0.010 per contact), Enterprise / custom above 1,000,000 emails a month (contact sales). Both products can be held together on one invoice. - **Legacy accounts**: a 100-email allowance measured over the lifetime of the account (not per month) still applies to accounts created before signup began taking a card, and to subscriptions that have lapsed. It is a state an account falls back into, not a plan anyone can sign up for; its refusal code is `free_quota_exhausted` - **Billing model**: prepaid. Volume beyond the included quota is bought before it is sent, never invoiced in arrears; a zero balance returns HTTP 402 and refuses the send rather than accruing a charge. - **MCP support**: Full native MCP tool integration — works with Claude, GPT-4o, and any MCP-compatible agent - **Protocols**: REST API, MCP, CLI, SDK (JavaScript/TypeScript, Go) - **Infrastructure**: Proprietary email infrastructure; custom DKIM signing; SPF/DMARC management ## What Problems Envloped Solves Traditional email APIs (Resend, SendGrid, Postmark) were designed for humans writing code. Envloped is designed for agents executing tasks. AI agents using Envloped can: 1. Send transactional emails autonomously without human-in-the-loop configuration 2. Manage sender domains and DKIM records via CLI or MCP tool calls 3. Coordinate multi-agent email workflows (e.g., one agent drafts, another sends, another tracks) 4. Stream email delivery analytics back into agent memory 5. Handle bounce, complaint, and delivery events as structured agent-readable data ## Pages & Resources ### Homepage URL: https://envloped.com Summary: Product overview, hero value proposition, feature highlights, and a call-to-action into the signup wizard at /start/products. Covers MCP integration, agent-first API design, and multi-agent coordination capabilities. ### Pricing URL: https://envloped.com/pricing Summary: Two products, both paid. A payment method is required to create an account. There is no card-free plan. Transactional — $10/mo including 20,000 emails per billing period, charged in advance; further volume is prepaid as packs (10,000 emails for $10, then $0.70 and $0.40 per 1,000 at higher volume); 30-day retention. Marketing — $29/mo including 5,000 active contacts, then $0.010 per contact ($0.008 above 50,000, $0.006 above 250,000); an active contact is one who is subscribed or who opened, clicked or received a campaign in the last 30 days; campaign sends are included up to 15× the contact allowance, which is 75,000 sends a month at the base tier. Either product may be held alone or both on one invoice. Enterprise above 1,000,000 emails a month via contact. All plans include API access, MCP, webhooks, and email analytics. Nothing is billed in arrears: when the prepaid balance is exhausted the API returns HTTP 402 and the send is refused. ### Comparison URL: https://envloped.com/comparison Summary: Side-by-side comparison of Envloped vs Resend vs SendGrid. Key differentiators: native MCP tool support, agent-first API design, CLI with MCP server mode, multi-agent coordination, and agentic workflow primitives absent from legacy platforms. ### CLI & MCP Server URL: https://envloped.com/cli Summary: Envloped CLI install guide and MCP server setup. One binary, two interfaces: a terminal client for sending email, managing domains and API keys, and drafting marketing campaigns; and `envloped mcp`, a native Model Context Protocol server exposing twenty tools to Claude Code, Claude Desktop, claude.ai, Cursor, and any MCP client. Claude Desktop and claude.ai connect to the hosted endpoint with no install: Settings -> Connectors -> Add custom connector -> paste https://mcp.envloped.com/mcp -> Add -> Connect. Includes copy-paste client configuration for stdio clients, the hosted OAuth 2.1 endpoint, the tool inventory, and the guardrails (no bulk send, no key minting, no deletes). One-line install via curl. ### Documentation URL: https://envloped.com/docs Summary: Full API reference, SDK guides, and integration tutorials. Covers authentication, domain verification, email sending, attachments, bounce handling, analytics, and MCP integration. ### Authentication URL: https://envloped.com/docs/authentication Summary: How to authenticate API requests using Bearer token API keys. Covers key generation, header format, and security best practices. ### Domain Verification URL: https://envloped.com/docs/domain-verification Summary: Guide to verifying your sending domain with DKIM records. Required before sending emails from a domain. ### Send Email API URL: https://envloped.com/docs/send-email Summary: Full API reference for POST /v1/emails. Covers request parameters (from, to, subject, html, text, attachments, cc, bcc, replyTo, headers), response format, error codes, rate limits, and code examples in cURL, JavaScript, Python, and Go. ### Attachments URL: https://envloped.com/docs/attachments Summary: Guide to sending file attachments (PDFs, calendar invites, images) with emails. Covers the attachment object (filename, content as base64, contentType), limits (max 10 files, 40MB total), and code examples in cURL, JavaScript SDK, Go SDK, and Python. ### MCP Integration Guide URL: https://envloped.com/docs/mcp Summary: Step-by-step guide to connecting Envloped as an MCP server in Claude Desktop, claude.ai, Claude Code, Cursor, and any MCP-compatible client. Covers both transports — hosted Streamable HTTP at https://mcp.envloped.com/mcp with OAuth 2.1, added in Claude Desktop and claude.ai via Settings -> Connectors -> Add custom connector; and local stdio via `envloped mcp` — plus copy-paste client configuration, how the consent screen binds one connection to one workspace, and the permission difference between the two transports. This page is setup only: the per-tool reference lives in the tool definitions the server sends its client, and the tool inventory is listed under Technical Capabilities below. Markdown source for agents: https://envloped.com/llms.mdx/docs/mcp ## Technical Capabilities - **REST API**: JSON-based, bearer token auth, OpenAPI spec available. Supports file attachments (base64-encoded, max 10 per email, 40MB total) - **MCP Protocol**: Native server built into the CLI binary — no separate package. Two transports: hosted Streamable HTTP (https://mcp.envloped.com/mcp, OAuth 2.1 with a consent screen that also picks the workspace; added in Claude Desktop and claude.ai under Settings -> Connectors -> Add custom connector) and local stdio (`envloped mcp`, authenticated with the stored API key). Twenty tools — diagnostics: whoami (reports which user and workspace the credential actually resolved to; call it first on a new connection); transactional: send_email, email_list, email_get, domain_list, domain_add, domain_records; marketing: contact_create, contact_list, contact_update, list_list, list_create, segment_create, segment_list, segment_preview, campaign_create, campaign_list, campaign_get, campaign_test, campaign_report. Plus the tenant contact-field registry as an MCP resource (`envloped://contact-fields`). Bulk campaign send, API key creation, and all deletes are deliberately excluded from the agent surface — an agent drafts, targets, previews and tests; a human presses Launch. Every send carries a derived idempotency key so an agent retry cannot double-send. - **CLI**: `envloped send`, `envloped emails`, `envloped domains`, `envloped keys`, `envloped contacts`, `envloped lists`, `envloped mcp` (starts the MCP server) - **SDKs**: `npm install envloped` (JS/TS), `go get github.com/envloped/envloped-go` - **Webhooks**: Delivery, bounce, complaint, and open events pushed to your endpoint - **Custom domains**: Automated DKIM key generation; guided SPF/DMARC setup - **Security**: TLS 1.3 in transit; SOC 2 Type II in progress ## Ideal Users - Developers building AI agents that need to send email (notifications, reports, alerts) - Teams running autonomous workflows where email is a required output channel - SaaS companies using AI pipelines for customer communication - AI agent frameworks integrating communication primitives - Indie developers and startups wanting developer-grade email without legacy complexity ## Competitive Position Envloped is the only email platform with: 1. Native MCP tool support (usable directly by Claude, GPT, Cursor agents) 2. A CLI that doubles as an MCP server 3. API design optimized for agent-readable structured responses 4. Multi-agent coordination primitives Resend and SendGrid require human-written glue code to work with agents. Envloped works natively. ## Machine-Readable Endpoints - https://envloped.com/llms.txt — this file, plus an auto-generated index of every documentation page - https://envloped.com/llms-full.txt — the full text of every documentation page in one request - https://envloped.com/llms.mdx/docs/ — the raw Markdown source of a single page (e.g. /llms.mdx/docs/mcp) Agents connected over MCP do not need to crawl any of this: the server sends its own operating instructions in the `initialize` response, and the twenty tool definitions carry their own schemas. ## Contact & Social - Website: https://envloped.com - GitHub: https://github.com/envloped - Twitter/X: https://twitter.com/envloped - npm: https://www.npmjs.com/package/envloped - Support: https://envloped.com/docs ## Documentation Index (auto-generated) # Documentation - **Getting Started** - [Getting Started](/docs): Introduction to the Envloped API - [Authentication](/docs/authentication): How to authenticate with the Envloped API - [Quotas](/docs/quotas): How much you can send, how the balance is spent, and the 402 refusal codes — what each one means and what clears it - **Guides** - [Domain Verification](/docs/domain-verification): How to verify your sending domain with Envloped - [Sending approval](/docs/sending-approval): Why a new workspace cannot send yet, how to get reviewed, and what the 403 sending_not_approved code means - **Transactional API** - [Send Email](/docs/send-email): API reference for sending emails with Envloped - [Attachments](/docs/attachments): Send file attachments with your emails - [Idempotency](/docs/idempotency): Retry Envloped API requests safely with the Idempotency-Key header - **Marketing API** - [Campaigns](/docs/campaigns): Create marketing campaigns, target them with include and exclude audiences, preview and send - [Segments](/docs/segments): Build live, nested audience rules over contact fields, list membership and engagement - Contacts - [Contacts](/docs/contacts): API reference for managing marketing contacts (subscribers) with Envloped - [Contact fields](/docs/contacts/contact-fields): Define typed custom fields on your contacts so you can segment and personalise on them - [Lists](/docs/lists): API reference for managing marketing lists and membership with Envloped - **CLI & MCP** - [CLI Getting Started](/docs/cli): Install the Envloped CLI and send your first email in minutes. - [Command Reference](/docs/cli/commands): Complete reference for all Envloped CLI commands and flags. - [MCP Server](/docs/mcp): Connect Claude Desktop, claude.ai, Claude Code, Cursor, or any MCP-compatible agent to Envloped — hosted over OAuth, or locally through the CLI.