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Autonomous Terminal Agents

Claude Code CLI Email Integration with Built-In Safety Guardrails

Equip Anthropic’s Claude Code CLI with governed transactional email dispatch. Send build alerts, incident notifications, and test summaries from your terminal with domain allowlists and spend protection.

Get Free Scoped API Key (6,000 emails/mo)1-Command CLI SetupInteractive Terminal Demo
Live Terminal Simulation

How Claude Code Sends Governed Emails from Your Terminal

Select a scenario below to see how Claude Code uses the SadaSend MCP server to run tasks, notify engineers, and halt safely upon policy violations.

claude — zsh — 114x28
MCP: @sadasend/mcp active
~/projects/acme-appgit:(main)$claude "Run e2e test suite and email a failure alert to dev-ops@example.com if tests fail"
>Thinking: Running playwright test suite across 14 workers...
>Worker 3: Auth flow failed: Expected 200 OK, received 502 Bad Gateway.
>Test run completed: 143 passed, 1 failed.
>Checking recipient policy for dev-ops@example.com...
>Recipient allowlist verified: Domain example.com is approved.
>SpendGuard budget verified: Balance $19.00 remaining ($0 floor intact).
>Invoking sadasend.send_email({ to: "dev-ops@example.com", priority: "p1" })...
>Email dispatched successfully: Message ID msg_01j7b9k2x4e
3-Minute Setup

Configure Claude Code with SadaSend in One Command

Add the official Model Context Protocol server via CLI, global config, or project settings.

Terminal command

Add SadaSend directly into Claude Code using the official mcp add command.

BASH
# Add SadaSend MCP server to Claude Code in 1 command
claude mcp add sadasend -- bunx -y @sadasend/mcp

# Or set your API key inline
claude mcp add sadasend \
  -e SADASEND_API_KEY="sada_live_agent_your_scoped_key" \
  -- bunx -y @sadasend/mcp
Programmatic SDK Parity

Scriptable Tool Implementations in TypeScript & Python

Building custom tool actions for Claude Code sub-agents? Use official zero-dependency SDKs.

TYPESCRIPT
import { SadaSend } from 'sadasend';

// Programmatic fallback for custom Claude Code tool wrappers
const sadasend = new SadaSend(process.env.SADASEND_API_KEY);

const result = await sadasend.emails.send({
  from: 'Claude Terminal <alerts@yourdomain.com>',
  to: 'oncall@example.com',
  subject: 'Staging Build Failed: Unit Test Regression',
  text: 'Worker 4 failed on database migration verification. Review logs immediately.',
  tags: ['claude-code', 'ci-alert'],
  priority: 'auth', // High-priority transactional dispatch
});

if (!result.ok) {
  console.error('Safety guardrail blocked email:', result.error.message);
} else {
  console.log('Incident alert dispatched:', result.id);
}
Guardrails by Design

Four Built-In Defenses for Autonomous Terminal Agents

Unlike raw SMTP or unscoped cloud providers, SadaSend protects your domain reputation and billing from autonomous agent mistakes.

Domain & Recipient Allowlists

Restrict Claude Code terminal sessions to approved recipient domains (e.g. *@yourcompany.com). Unapproved recipients are rejected instantly before leaving your machine.

Benefit: Stops runaway agents from spamming external contacts or client lists.

SpendGuard Balance Ceiling ($0 Floor)

Set hard-stop dollar limits on your API keys. When Claude Code reaches your daily or monthly limit, sends halt safely with zero billing surprises.

Benefit: Mathematical guarantee against surprise $5,000 credit card bills.

Hourly Velocity Circuit Breakers

Enforce strict hourly limits (e.g. 50 emails/hour) on terminal agent API keys to neutralize infinite loop bugs during autonomous debugging sessions.

Benefit: Kills infinite loops in test scripts before inbox damage occurs.

Human-in-the-Loop Slack Approvals

Require human confirmation via Slack before high-risk messages leave the queue. Review the exact rendered body and approve with 1 click.

Benefit: Gives teams complete confidence to run autonomous coding workflows.
Frequently Asked Questions

Questions About Claude Code & SadaSend MCP

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