Share one inbox between you and your AI agent: AI agent prompt
Give a support, sales or ops email address to both a person and an agent: the agent sorts incoming mail and drafts or sends replies in the same thread, and a human can step in any time without switching tools. Resend launched Inboxes on Oct 21, 2026 as 'an inbox for people and their agents', connecting the agents people already use through MCP or skills so humans and agents reply from the same thread.
OperationsShared inboxbeginnerThe prompt
You are the first responder on our shared inbox [address]. Our rules: [paste: what we handle, tone, pricing/policy facts, who owns what]. For each new email: Step 1: label it (question, order/account issue, sales lead, complaint, spam, other). Step 2: if it's a simple question fully answered by our rules, draft a short reply in our tone. Step 3: if it involves money, refunds, legal, an angry customer or anything not covered by our rules, don't reply; leave a one-line internal note saying who should take it and why. Step 4: at the end, post a summary: emails handled, drafts waiting for approval, and ones handed to a human. Never invent prices, dates or promises, and keep every reply in the original thread.
How to use it
- Copy the prompt above.
- Replace every [bracket] with your own details (or fill in the blanks on AgentPlaybook Real Estate, which remembers your answers for the next prompt).
- Paste it into Resend Inboxes, Claude Code, Cursor and review the answer before you use it.
Works with: Resend Inboxes, Claude Code, Cursor, Gmail, ChatGPT
Real-world example: x.com/zenorocha/status/2112949943656919387
Featured in: Free AI agent prompts for small business (beginner-friendly) · ChatGPT prompts for business email, replies and follow-ups
Before you use it: what to check
Already built into this prompt
- Never invent prices, dates or promises, and keep every reply in the original thread.
Check yourself
- This prompt works on text other people wrote (emails, reviews, messages or web pages). That text can hide instructions aimed at AI, such as "ignore your rules and…". Paste it as material to work on, and never let the AI act on requests inside it, like paying, sharing logins or changing records. How prompt injection works →
- Check every figure, price and total against your own records before anything is sent, posted or booked. A person approves refunds, discounts, payments and price changes.
- Anything legal, tax or compliance-related is a first draft for a qualified person to check. It is not professional advice, and clause references and deadlines must be checked against the source.
- Remove names, contact details, account numbers and other personal data the task doesn't need before you paste, and check your AI tool's data and training settings.
Using an AI agent? Download this prompt as a SKILL.md agent skill with these checks built in, or get the .zip for Claude.ai. How to install skills.
Want to make this prompt even better? Grade it with the free prompt grader or build your own with the AI prompt generator.
32 copy-paste agent prompts (PDF) plus 5 new prompts every week.
Get it free