I already have an agent
Give your agent an email address and phone number. Connect through API or MCP and control its access.
Supported tools and voice setup are confirmed during onboarding.
Skip to contentGive your AI agent
Switch agent providers.
Choose how
API when you build.
Bring communication
Technical depth.
Give your agent
AI AGENT IDENTITIES
Give your AI agent
a real identity.
An email address and phone number for your AI.
Connect an agent you already run, or switch on a Mailrun-hosted receptionist for your business.
Our team will confirm availability and arrange onboarding individually.
Our team confirms the capabilities available for each setup.
Two ways to use your agent identity.
I need a receptionist
Switch on a Mailrun-hosted receptionist in the customer portal. Write instructions about your services, hours, and what to collect from callers.
The Mailrun-hosted receptionist is available now and can be switched on per identity in the customer portal.
MEET YOUR DIGITAL EMPLOYEE
One identity. A conversation and a next step.
ALEX → YOUR DIGITAL EMPLOYEE
A question lands in its inbox.
ALEX / CUSTOMER
Hi Sara. Could your team help us with setup?
SARA / YOUR AI AGENT
Absolutely. Tell me what you’re working with and I’ll help you find the right next step.
AlexMailrunYour agent
One address. A two-way conversation.
Your agent uses the business information you provide. Mailrun carries the email and replies.
Nothing is sent, called, or booked.
YOUR AGENT + MAILRUNYour agent decides what to say. Mailrun gives it a way to reach people.
YOUR IDENTITY. YOUR CHOICE.
Switch agent providers.
An agent identity is the name and contact channels people use to reach your AI agent. Mailrun gives your digital employee its own email address and phone number, with API and MCP access controlled by your company.
Keep your Mailrun email address and phone number when you change the connected agent or model. Your company controls the identity and the access you grant.
THE AGENT CAN CHANGE
Your current agent
YOUR MAILRUN IDENTITY STAYS
New agent. Same address. Same number. Keep the relationships you’ve built.sara@example.com
+1 (202) 555-0147
Identity continuity applies within Mailrun. A replacement agent still needs its own instructions, tools, permissions, and any context you choose to provide.
See how identity continuity worksChoose how
Connect your own agent.
Our team arranges access and confirms the supported setup during onboarding.
- 1
Choose your identity.
Set up the email address and phone number people will use to reach your agent.
- 2
Connect your agent.
Use the HTTP API or MCP for the supported tools. Your application runs the agent and provides its business knowledge.
- 3
Test and set limits.
Check an email exchange, configure access and usage limits, and test voice separately if your agent will answer calls.
Inbound voice needs a compatible, running public HTTPS voice endpoint. A desktop or MCP connection alone does not answer live calls.
Set up a Mailrun-hosted receptionist.
The Mailrun-hosted receptionist is available now and can be switched on per identity in the customer portal. No developer integration, webhook or public endpoint is needed for it to answer calls.
- 1
Choose your identity.
Choose an identity with a phone number, or give your identity a phone number.
- 2
Switch on the hosted agent.
In the customer portal, open the identity’s “Phone agent” dialog, switch on the hosted agent, write its instructions and greeting, and save. It answers from the next call, and you can add optional documents through the API or an MCP client.
- 3
Call your receptionist.
Call the identity’s phone number, then review the call record, taken message and summary.
Knowledge · Instructions · Permissions
YOUR AGENT. YOUR LIMITS. YOUR CONTROL.Give your agent reach.
Give your agent reach.
Email caps, phone usage limits, and scoped access help keep your digital employee within bounds. Give it room to work, with guardrails built in.
See how you stay in controlEmail sendingSet a daily sending cap for each identity.
CAPPEDPhone usageBuilt-in limits on call duration and concurrent calls.
BOUNDEDAgent accessScope API keys. Revoke access when you need to.
SCOPEDAPI when you build.
MCP where
you work.
Build directly against the HTTP API, or use MCP to bring email and phone tools into your agent’s working environment.
- Identity separate from the model
- Scoped access to communication
- Conversation history through the API
EMAIL · PHONE · API · MCP Two communication channels.
Two ways to integrate.
Interested in the Mailrun-hosted receptionist? Start with the business setup above.
MODEL CONTEXT PROTOCOL
Bring communication
into the agent’s workspace.
Your agent
MCP
m.MailrunConnect compatible agent clients to Mailrun’s email and phone capabilities through MCP.
Email and phone tools in your agent’s workspace.
Let’s talk through your client and workflow.
Credentials your company controls.Talk through your integration
mailrun.
Technical depth.
A personal connection.
Talk directly to the people building it.
Bring your workflow and your questions. We’ll help you work through an agent integration or discuss a receptionist setup.
Talk with our teamA direct conversation about your setup.Direct product supportHands-on onboardingSending discipline
LET’S BUILD SOMETHING USEFUL
Give your agent
an identity of its own.
Request access and tell us whether you run an agent or want a receptionist. Our team arranges onboarding individually. A request does not guarantee access.
A conversation with our team.
No account or subscription is created by this request.
What’s included?
Access is by request, and our team arranges onboarding individually. There are two paths: connect an agent you run through API or MCP, or use a Mailrun-hosted receptionist. We’ll confirm the email, phone, tools, limits, and setup available to you before onboarding. The hosted receptionist is available on any identity with a phone number. Calls cost $0.22 per minute with the hosted agent or $0.13 per minute with your own agent, billed per second.
What does my agent need to answer calls?
If you bring your own agent, it needs a compatible, running public HTTPS voice endpoint for live inbound calls. A desktop or MCP connection alone is not enough. The Mailrun-hosted receptionist handles that runtime for you, with no endpoint needed. In the customer portal, open the identity’s “Phone agent” dialog, switch on the hosted agent, write its instructions and greeting, and save. It answers from the next call.
Does Mailrun run my agent?
With your own agent, your application runs it and controls its workflow. With the Mailrun-hosted receptionist, Mailrun runs the conversation from your instructions, greeting and optional documents added through the API or an MCP client. It says it is an AI assistant by default, takes messages and summarizes calls. Your company controls the communication identity and the access you grant. You can switch back to your own agent at any time.
How do I get started?
Request access below and tell us whether you already run an agent or want a receptionist. Our team confirms availability and arranges onboarding individually. For a technical integration, you can read the quickstart while you wait. Read the quickstart →
Can I use it from Claude?
Yes. In claude.ai, the Claude apps or Claude Code, connect Mailrun Agent Identity and sign in with your Mailrun account; you see and allow exactly what Claude may do, and you can disconnect it from the portal at any time. Read the Claude connector guide →
Can I use another MCP client or agent?
Use an API key with any remote MCP client that supports Streamable HTTP and lets you set a bearer token, or call the HTTP API from your application. Sign-in is currently available only from Claude’s official apps and Claude Code. The developer docs cover MCP setup, the API reference, and webhooks for replies. Open the developer docs →
Can I bring my own domain?
Yes. Tell us which domain you want your agent to use. We’ll confirm eligibility and help connect it during onboarding.
Can I keep my existing phone number?
You may be able to forward calls from your existing mobile or office number. Support depends on your carrier, forwarding settings, and call route. We’ll confirm the supported setup and test it before you rely on it.
Can it book appointments?
The Mailrun-hosted receptionist can collect appointment requests as a message, including the caller’s details and preferred time, when your instructions tell it to. Your business confirms the appointment. Calendar availability checks and confirmed booking are not available.