Early accessMCP server for Grok

Cold email MCP server for Grok

Connect Grok to the Outreach2day MCP server through the xAI API. Grok quotes domains and mailboxes, runs warm-up, launches campaigns and reads replies. You approve and pay every order on Stripe. In early access now.

Get early accessGet API key
  • You approve every order
  • Payment on Stripe, never in chat
  • $2.50 per mailbox a month
xAI API · Outreach2day MCP

Which of our mailboxes are ready to send, and which ones are dragging the inbox rate down?

called outreach2day tools

38 of 40 mailboxes are warm. Inbox rate 94% over 7 days.

Low: sam@getacme.co (71%) and lee@acmehq.com (68%).

Both send in the Q4 campaign. Want the per-step stats before you decide?

Example conversation. Domains and numbers are made up.
teams have used Outreach2day
3,600+
emails sent a day
40M+

Among them

Can Grok run cold email through MCP?

Yes, in early access. The xAI API takes the Outreach2day MCP server as a remote MCP tool with your API key; Grok checks domains, quotes mailboxes, runs warm-up, launches campaigns and reads replies while you pay each order on Stripe.

Status: early access · Updated 28 September 2026

How it works

Cold email in Grok, step by step

  1. 1

    Add the tool

    Early-access workspaces pass the Outreach2day server to the xAI API as a remote MCP tool, with the key in the authorization field.

  2. 2

    Quote and pay

    Grok asks for a quote and shows it to you. You approve it and pay on the Stripe page Grok links.

  3. 3

    Warm up and launch

    Grok tracks setup and starts warm-up. When warm-up is done and preflight passes, ask Grok to launch.

  4. 4

    Watch the numbers

    Ask Grok for replies and per-mailbox inbox rate. It flags weak mailboxes and pauses the campaign when you say so.

Where it works

Outreach2day in Grok: where to connect

  • Early access · API key

    xAI API

    A remote MCP tool in the xAI API request, with the key in authorization.

    xAI docs: remote MCP tools
  • After early access: OAuth

    Grok app (custom connector)

    grok.com, Connectors, New connector, Custom. Needs OAuth sign-in, which ships after early access.

    xAI docs: Grok connectors

Prompts

Things to ask Grok

Plain language is enough. The agent picks the tools and asks before anything costs money.

  • Check if these domains are free: tryacme.com, getacme.co, acmehq.com.
  • Quote 4 domains and 16 mailboxes for acme.com and send me the payment link.
  • Which mailboxes are dragging the inbox rate down this week?
  • Is the Q4 campaign ready to launch? Run the preflight check.
  • List today's positive replies with the lead's company and the step that got the reply.
  • Compare inbox rate by domain for the last 7 days and flag any domain below 85%.

Tools

23 tools, from domains to replies

Tools ship to early-access workspaces first. Today the REST API covers workspaces, domain checks and warm-up status.

Account and pricing

  • get_pricing Current prices for mailboxes and domains
  • get_account_status Workspaces, mailboxes by state, open orders and the next step

Domains

  • check_domains Which domain names are free to buy
  • list_domains Your domains and their DNS status
  • connect_own_domains Connect domains you own; returns the records to set

Orders

  • quote_order Priced quote for domains and mailboxes
  • create_checkout Stripe checkout link for a confirmed quote; charges nothing
  • get_order Per-domain and per-mailbox setup state

Mailboxes and warm-up

  • list_mailboxes Mailboxes and their state, no credentials
  • start_warmup Start warm-up on mailboxes
  • get_warmup_status Warm-up stage, inbox rate and ready date

Campaigns

  • create_campaign Create a draft campaign
  • upsert_campaign_step Add or edit a sequence step
  • check_copy Check copy for spam words
  • import_campaign_contacts Import contacts into a campaign
  • attach_campaign_mailboxes Attach warm mailboxes to a campaign
  • preflight_campaign Check a campaign before launch
  • launch_campaign Launch after warm-up and a green preflight; needs confirmation
  • pause_campaign Pause a campaign

Results and export

  • get_campaign_stats Sent, bounces, replies per campaign and mailbox
  • list_replies Replies with campaign, step and mailbox
  • list_sequencers Connected Instantly and Smartlead workspaces
  • export_mailboxes_to_sequencer Send warm mailboxes to your sequencer; needs confirmation

Guardrails

Grok quotes. You pay.

Money moves only on a Stripe page you open. Grok can prepare an order, never complete one.

Grok can

  • Check domains, quote an order and send you the Stripe link
  • Connect domains you already own and give you the DNS records
  • Start warm-up and tell you when each mailbox is ready
  • Write and check the sequence, import contacts, launch after warm-up
  • Read replies and per-mailbox stats, pause a campaign that trips bounce limits
  • Export warm mailboxes to Instantly or Smartlead after you confirm

Grok cannot

  • Charge a card: every payment happens on a Stripe page you open
  • Launch a campaign before warm-up is done and the preflight check passes
  • Delete domains or mailboxes, cancel your plan or rotate passwords
  • Show mailbox passwords, SMTP/IMAP credentials or API keys in the chat
  • Order more than the first-order and daily spend limits of your workspace

Early access

Works today

The REST API is open to every account now. The MCP server opens to early-access workspaces first.

Get API key

Works today

  • The REST API, open to every account: workspaces, domain checks, warm-up status. API docs
  • A local MCP server over the API in about 110 lines of Python. Build it

Book a call

Get early access in a 15-minute call

Talk to the team building the MCP server. We add your workspace to early access and send the setup steps for Grok.

  • Add your workspace to the MCP early access
  • Set first-order and daily spend limits
  • Get the setup steps for Grok

See open times in your time zone and book without leaving the page.

Or open the booking page

Customers

Teams that send with Outreach2day

  • “That was the best infrastructure and value for money I saw.”
    Ido RebhunIdo RebhunRenaissance
  • “…deliverability with your inboxes is better than our outlook/google inboxes…”
    Daniel DultsinDaniel DultsinControl
  • “We really would like to thank you for that report. We don’t know what we are doing with email and it is very reassuring to us to know we have a partner on top of the ball.”
    ReilcapBill OConnorReilcap

FAQ

Questions

Or talk to the team

Does Grok support MCP servers?

Yes. The xAI API accepts remote MCP servers as tools, with a server URL, an authorization value and an optional list of allowed tools.

How do I connect Grok to my cold email setup?

Create an Outreach2day API key, then add the server to your xAI API request as a tool of type mcp with server_url, server_label and the key in authorization. Grok reads the tool list from the server and calls the tools it needs.

Can I connect the Outreach2day MCP server in the Grok app?

grok.com has custom connectors for remote MCP servers. They sign in with OAuth, which ships after early access. Until then, use the xAI API.

Can I limit which Outreach2day tools Grok can call?

Yes. The xAI remote MCP tool takes an allowed_tools list. Give it only the read tools for a reporting-only agent.

Can Grok spend money on my behalf?

No. Grok can ask for a quote and hand you a Stripe checkout link. You pay on the Stripe page yourself. Quotes are priced by Outreach2day, and new workspaces have first-order and daily spend limits.

Is the Outreach2day MCP server available now?

In early access. Book a call and we add your workspace to the first group. The REST API is open to every account today: create a key in the app and call it from any script or agent.

What does it cost?

The MCP server comes with your Outreach2day account. You pay for what the agent orders: $2.50 per mailbox a month, domains billed yearly, both shown in the quote before you pay.

Which tools does the server have?

Tools for pricing and account status, domains, orders and Stripe checkout, mailboxes and warm-up, campaigns, replies and stats, and export to Instantly or Smartlead. The full list is on this page.

Can I use domains I already own?

Yes. The agent connects them and returns the DNS records to set at your registrar. Connecting your own domains is free.

How long until new mailboxes can send?

About 14 days of warm-up. The agent reports each mailbox's warm-up stage and ready date, and launch is refused until warm-up is done.

Can I keep sending from Instantly or Smartlead?

Yes. The agent exports warm mailboxes to your Instantly or Smartlead workspace after you confirm, and you keep your sequences there.

Does Grok see my mailbox passwords?

No. No tool returns passwords, SMTP or IMAP credentials, or API keys. Export to a sequencer is the only step that moves credentials, and it needs your confirmation.

What happens if part of an order fails?

The order shows which domain or mailbox failed, with a link to support. Our team retries or refunds that item.

Clients

Other AI clients

The same server and the same tools in every client. Only the setup differs.

Read next

Guides for MCP and the API

Run cold email from Grok

Domains, mailboxes, warm-up, campaigns and replies from Grok. You approve every order. Book a call to join early access.

Get early accessGet API key