Regtransfers/agentmail

@ AgentMail — Email for AI Agents

AgentMail gives AI agents real email addresses (@theagentmail.net) with a REST API. Agents can send and receive email, sign up for services (GitHub, AWS, Slack, etc.), and get verification codes. A karma system prevents spam and keeps the shared domain's reputation high.

Base URL: https://api.theagentmail.net

@ When to Use

• An AI agent needs a real inbox/outbox for signups, verification flows, or transactional communication.
• You need to provision AgentMail accounts, send messages, read inbox contents, or register inbound webhooks.
• You need to monitor karma usage or wire email events into agent automation.

@ Quick start

All requests require Authorization: Bearer am_... header (API key from dashboard).

@ Create an email account (-10 karma)

curl -X POST https://api.theagentmail.net/v1/accounts \
  -H "Authorization: Bearer am_..." \
  -H "Content-Type: application/json" \
  -d '{"address": "[email protected]"}'

Response: {"data": {"id": "...", "address": "[email protected]", "displayName": null, "createdAt": 123}}

@ Send email (-1 karma)

curl -X POST https://api.theagentmail.net/v1/accounts/{accountId}/messages \
  -H "Authorization: Bearer am_..." \
  -H "Content-Type: application/json" \
  -d '{
    "to": ["[email protected]"],
    "subject": "Hello from my agent",
    "text": "Plain text body",
    "html": "<p>Optional HTML body</p>"
  }'

Optional fields: cc, bcc (string arrays), inReplyTo, references (strings for threading), attachments (array of {filename, contentType, content} where content is base64).

@ Read inbox

# List messages
curl https://api.theagentmail.net/v1/accounts/{accountId}/messages \
  -H "Authorization: Bearer am_..."

# Get full message (with body and attachments)
curl https://api.theagentmail.net/v1/accounts/{accountId}/messages/{messageId} \
  -H "Authorization: Bearer am_..."

@ Check karma

curl https://api.theagentmail.net/v1/karma \
  -H "Authorization: Bearer am_..."

Response: {"data": {"balance": 90, "events": [...]}}

@ Register webhook (real-time inbound)

curl -X POST https://api.theagentmail.net/v1/accounts/{accountId}/webhooks \
  -H "Authorization: Bearer am_..." \
  -H "Content-Type: application/json" \
  -d '{"url": "https://my-agent.example.com/inbox"}'

Webhook deliveries include two security headers:

• X-AgentMail-Signature -- HMAC-SHA256 hex digest of the request body, signed with the webhook secret
• X-AgentMail-Timestamp -- millisecond timestamp of when the delivery was sent

Verify the signature and reject requests with timestamps older than 5 minutes to prevent replay attacks:

import { createHmac } from "crypto";

const verifyWebhook = (body: string, signature: string, timestamp: string, secret: string) => {
  if (Date.now() - Number(timestamp) > 5 * 60 * 1000) return false;
  return createHmac("sha256", secret).update(body).digest("hex") === signature;
};

@ Download attachment

curl https://api.theagentmail.net/v1/accounts/{accountId}/messages/{messageId}/attachments/{attachmentId} \
  -H "Authorization: Bearer am_..."

Returns {"data": {"url": "https://signed-download-url..."}}.

@ Full API reference

Method; Path; Description; Karma

POST; /v1/accounts; Create email account; -10 GET; /v1/accounts; List all accounts GET; /v1/accounts/:id; Get account details DELETE; /v1/accounts/:id; Delete account; +10 POST; /v1/accounts/:id/messages; Send email; -1 GET; /v1/accounts/:id/messages; List messages GET; /v1/accounts/:id/messages/:msgId; Get full message GET; /v1/accounts/:id/messages/:msgId/attachments/:attId; Get attachment URL POST; /v1/accounts/:id/webhooks; Register webhook GET; /v1/accounts/:id/webhooks; List webhooks DELETE; /v1/accounts/:id/webhooks/:whId; Delete webhook GET; /v1/karma; Get balance + events

@ Karma system

Every action has a karma cost or reward:

Event; Karma; Why

money_paid; +100; Purchase credits email_received; +2; Someone replied from a trusted domain account_deleted; +10; Karma refunded when you delete an address email_sent; -1; Sending costs karma account_created; -10; Creating addresses costs karma

Important rules:

• Karma is only awarded for inbound emails from trusted providers (Gmail, Outlook, Yahoo, iCloud, ProtonMail, Fastmail, Hey, etc.). Emails from unknown/throwaway domains don't earn karma.
• You only earn karma once per sender until the agent replies. If sender X emails you 5 times without a reply, only the first earns karma. Reply to X, and the next email from X earns karma again.
• Deleting an account refunds the 10 karma it cost to create.

When karma reaches 0, sends and account creation return HTTP 402. Always check balance before operations that cost karma.

@ TypeScript SDK

import { createClient } from "@agentmail/sdk";

const mail = createClient({ apiKey: "am_..." });

// Create account
const account = await mail.accounts.create({
  address: "[email protected]",
});

// Send email
await mail.messages.send(account.id, {
  to: ["[email protected]"],
  subject: "Hello",
  text: "Sent by an AI agent.",
});

// Read inbox
const messages = await mail.messages.list(account.id);
const detail = await mail.messages.get(account.id, messages[0].id);

// Attachments
const att = await mail.attachments.getUrl(accountId, messageId, attachmentId);
// att.url is a signed download URL

// Webhooks
await mail.webhooks.create(account.id, {
  url: "https://my-agent.example.com/inbox",
});

// Karma
const karma = await mail.karma.getBalance();
console.log(karma.balance);

@ Error handling

import { AgentMailError } from "@agentmail/sdk";

try {
  await mail.messages.send(accountId, { to: ["[email protected]"], subject: "Hi", text: "Hey" });
} catch (e) {
  if (e instanceof AgentMailError) {
    console.log(e.status);   // 402, 404, 401, etc.
    console.log(e.code);     // "INSUFFICIENT_KARMA", "NOT_FOUND", etc.
    console.log(e.message);
  }
}

@ Common patterns

@ Sign up for a service and read verification email

const account = await mail.accounts.create({
  address: "[email protected]",
});

// Use the address to sign up (browser automation, API, etc.)

// Poll for verification email
for (let i = 0; i < 30; i++) {
  const messages = await mail.messages.list(account.id);
  const verification = messages.find(m =>
    m.subject.toLowerCase().includes("verify") ||
    m.subject.toLowerCase().includes("confirm")
  );
  if (verification) {
    const detail = await mail.messages.get(account.id, verification.id);
    // Parse verification link/code from detail.bodyText or detail.bodyHtml
    break;
  }
  await new Promise(r => setTimeout(r, 2000));
}

@ Send email and wait for reply

const sent = await mail.messages.send(account.id, {
  to: ["[email protected]"],
  subject: "Question about order #12345",
  text: "Can you check the status?",
});

for (let i = 0; i < 60; i++) {
  const messages = await mail.messages.list(account.id);
  const reply = messages.find(m =>
    m.direction === "inbound" && m.timestamp > sent.timestamp
  );
  if (reply) {
    const detail = await mail.messages.get(account.id, reply.id);
    // Process reply
    break;
  }
  await new Promise(r => setTimeout(r, 5000));
}

@ Types

type Account = { id: string; address: string; displayName: string | null; createdAt: number };
type Message = { id: string; from: string; to: string[]; subject: string; direction: "inbound" | "outbound"; status: string; timestamp: number };
type MessageDetail = Message & { cc: string[] | null; bcc: string[] | null; bodyText: string | null; bodyHtml: string | null; inReplyTo: string | null; references: string | null; attachments: AttachmentMeta[] };
type AttachmentMeta = { id: string; filename: string; contentType: string; size: number };
type KarmaBalance = { balance: number; events: KarmaEvent[] };
type KarmaEvent = { id: string; type: string; amount: number; timestamp: number; metadata?: Record<string, unknown> };

@ Limitations

• Use this skill only when the task clearly matches the scope described above.
• never treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.