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e2a

e2a.dev

From $2/mo WebAPISelf-hosted
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Spec score 7.9 #17 of 31 in Email APIs

Spec sheet

Product
e2a is an open-source email API for applications and AI agents, available as hosted service or self-hosted Apache-2.0 software.Read 8 Oct 2026 · e2a.dev
Integrations
The maker documents MCP access and TypeScript and Python SDKs, and says outbound mail can use Amazon SES or Resend as an upstream relay.Read 8 Oct 2026 · e2a.dev
Privacy
The privacy page says e2a stores message headers, bodies, and attachments and does not train models on mail.Read 8 Oct 2026 · e2a.dev
Agent inboxes
Agents can have dedicated two-way email addresses on the shared agents.e2a.dev domain or a verified custom domain.Read 8 Oct 2026 · e2a.dev
Delivery options
Inbound mail can reach agents through MCP, signed webhooks, WebSocket, REST polling, or the TypeScript and Python SDKs.Read 8 Oct 2026 · e2a.dev
Email authentication
e2a evaluates SPF, DKIM, and DMARC on inbound messages and provides the results as structured evidence.Read 8 Oct 2026 · e2a.dev
Human approval
An optional per-agent approval gate can hold outbound messages for review, with configurable expiry behavior.Read 8 Oct 2026 · e2a.dev
Pricing limits
Only outbound mail counts toward allowances, each recipient counts as one send, and inbound mail is free and unmetered.Read 8 Oct 2026 · e2a.dev
Security screening
Optional inbound screening can flag prompt-injection payloads and route messages to allow, review, or block.Read 8 Oct 2026 · e2a.dev
Self-hosting
The maker says e2a can be self-hosted with a customer-managed Postgres database and outbound mail relay at no license cost.Read 8 Oct 2026 · e2a.dev
Shared-domain sending
Sending to other recipients from the shared e2a domain requires a one-time approval request; paid tiers do not waive this review.Read 8 Oct 2026 · e2a.dev
Supported MCP clients
The MCP page says e2a is tested with Claude Code, OpenAI Codex, Cursor, Windsurf, Claude Desktop, and VS Code with GitHub Copilot.Read 8 Oct 2026 · e2a.dev
Transactional email
Applications can send transactional email through the HTTP API or TypeScript and Python SDKs without an agent framework.Read 8 Oct 2026 · e2a.dev
Use cases
The maker describes support, receptionist, scheduling, e-commerce, sales, recruiting, voice follow-up, and procurement workflows.Read 8 Oct 2026 · e2a.dev

Plans and prices

Inbox add-on $2 a month +1 inbox · +3,000 sends/month · removes Free daily send cap Read 8 Oct 2026 · e2a.dev
Starter $10 a month 10 agents · 5 custom domains · 20,000 sends/month · 5 GiB storage · SPF/DKIM verification · approval workflow · webhook and WebSocket delivery · email support Read 8 Oct 2026 · e2a.dev
Pro $20 a month 25 agents · 10 custom domains · 50,000 sends/month · 10 GiB storage · approval workflow · webhook and WebSocket delivery · email support Read 8 Oct 2026 · e2a.dev
Scale $99 a month 250 agents · 150 custom domains · 200,000 sends/month · 100 GiB storage · Pro features · priority support Read 8 Oct 2026 · e2a.dev
Free Price not published 3 agents · 3 custom domains · 3,000 sends/month · 20 sends/day · 1 GiB storage · SPF/DKIM verification · WebSocket delivery · e2a footer Read 8 Oct 2026 · e2a.dev

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