Replit + AgentMailBuild email agents on Replit
AgentMail is the fastest way to give a Replit agent its own email inbox. Your agent gets its own inbox, can send and receive email, and polls for replies.
One command
The AgentMail SDK installs in one line on Replit. Add your API key to Replit Secrets and your agent has a real inbox.
agentmail
anthropic
python-dotenv# Tools -> Secrets -> Add secret
# Key: AGENTMAIL_API_KEY
# Value: am_us_your_key_hereWhy your Replit agent needs its own inbox
No SMTP config required
Replit projects often use shared IPs that are rate-limited by email providers. AgentMail has its own dedicated infrastructure - your agent emails land in inboxes, not spam.
API key stays secure
Store your API key in Replit Secrets, not your code. The AgentMail SDK reads from environment variables automatically.
Fork and deploy in minutes
Start from the official AgentMail Replit template. Fork it, add your API key, and have a working email agent running in under 5 minutes.
Working code
import os, time
from agentmail import AgentMail
from anthropic import Anthropic
client = AgentMail(api_key=os.getenv("AGENTMAIL_API_KEY"))
claude = Anthropic()
inbox = client.inboxes.create()
print(f"Agent inbox: {inbox.inbox_id}")
client.inboxes.messages.send(
inbox_id=inbox.inbox_id,
to="prospect@example.com",
subject="Quick question",
text="Hi - building something in the AI space and wanted to connect.",
)
while True:
time.sleep(30)
messages = client.inboxes.messages.list(inbox_id=inbox.inbox_id)
for msg in (messages.messages or []):
reply = claude.messages.create(
model="claude-haiku-4-5-20251001",
max_tokens=10,
messages=[{
"role": "user",
"content": f"Classify as INTERESTED / NOT_INTERESTED / OOO:\n{msg.text}"
}]
).content[0].text.strip()
print(f"{msg.from_address}: {reply}")FAQ
Common questions about AgentMail and Replit.
- How do I use AgentMail on Replit?
- Add agentmail to requirements.txt, store your API key in Replit Secrets as AGENTMAIL_API_KEY, and import it in your code. The SDK reads the key automatically from environment variables.
- Is there a Replit template I can fork?
- Yes. Fork the official AgentMail template on Replit, add your API key to Secrets, and you have a working email agent in minutes.
- Why not use Replit's built-in email features?
- Replit's built-in email tools are for sending notifications from the platform, not for building agents with their own email identity. AgentMail gives your agent a real inbox it owns and can read from.
- Can I use webhooks on Replit?
- Yes. Every Replit project gets a public URL. Point your AgentMail webhook at your Replit app URL and it will receive incoming email events in real time.
- Does the Node.js SDK work on Replit too?
- Yes. Both the Python and Node.js SDKs work on Replit. Install with npm install agentmail and use the same AGENTMAIL_API_KEY secret.
- Why not just use the Gmail API or SendGrid?
- Gmail API requires OAuth and was built for human accounts, not programmatic agent use. SendGrid handles sending only - no receiving, no threading, no reply parsing. AgentMail gives your Replit agent a dedicated inbox it can create on demand, send from, receive on, and read - with full thread context and no credential sharing.
Give your Replit agent its own inbox
Free tier. No credit card required. Inboxes ready in under a second.
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