RouterGrowth

Find and enrich12 capabilities

Companies, the people in them, verified emails and buying signals

Research the market21 capabilities

Search, social networks, ad libraries, reviews and AI answers

Reach out and create43 capabilities

Sending domains, inboxes, LinkedIn and the creative that goes out

3,000+ tools behind 76 capabilities, one key, one prepaid balance All tools →Catalog →Free tools →

Find leads48 workflows

Lists built from hiring, funding, the tech stack and Google Maps

Run outbound37 workflows

Cold email, LinkedIn and follow-ups, from the first list to the reply

Watch the market43 workflows

SEO, AI answers, competitors' ads, brand mentions and ad creative

99 workflows with the prompt to paste, 18 guides, 11 skills your agent installs All workflows →Guides →Skills →

Pricing Docs Get started

Tools / Job

Cold email for your AI agent: the domain, the inboxes, the warm-up and the send

Q: Can an AI agent buy a domain and set up inboxes?

Yes. domain.search finds an available name, domain.register buys it, domain.dns writes the records and email.inbox creates the mailboxes.

Q: How does email warm-up work?

email.warmup enrols an inbox in a network of real mailboxes that send to it, open, reply and move its mail out of spam, ramping to the daily volume you set.

RouterGrowth gives an agent the whole cold email stack through one MCP server: find and register a sending domain, write its DNS records, create inboxes, warm them up, send, and read the replies. It is the infrastructure an agent needs to run outbound from zero, on one balance.

10 tools live 3 providers from $0.002 a call MCP · REST · CLI

Ask your agent

Set me up for cold email from zero: find a domain close to ours, register it, create three inboxes and start warming them.

Add to Claude Add to ChatGPT

Connect RouterGrowth once, then ask in plain words. New workspaces start with $1 of credit. Get a key or read the setup guide.

Cold email tools

What can your agent do for cold email?

Each row is one tool your agent can call. The price is the lowest a successful call costs at list price. The exact figure is quoted before every run.

Tool	What it returns	Providers	From
Domain searchdomain.search	Check which domains are available and what they cost to register through RouterGrowth: a name across common TLDs, or one exact domain.	Name.com	$0.002per search
Register a domaindomain.register	Buy a domain for outbound sending. Registered in RouterGrowth's registrar account with you as the registrant contact; WHOIS privacy on; transferable to you on request.	Name.com	$21per domain
Write DNS recordsdomain.dns	Create DNS records on a domain registered through RouterGrowth: the records email.domain asks for, or anything else.	Name.com	$0.002per call
Your sending domainemail.domain	Bring your own domain for outbound: registers it, returns the DNS records and a one-click setup link, and reports verification status. Run again to re-check.	AgentMail	$2.328per domain
Agent inboxemail.inbox	Create (or fetch) a sending inbox owned by your organization on a domain you verified with email.domain: name + domain, idempotent. Or rename one you own: inbox_id + display_name sets the From name on everything it sends (free). Run email.inboxes first to see what you already own.	AgentMail	$2.328per inbox
Inbox warm-upemail.warmup	Warm up one of your inboxes before cold sending: a network of real mailboxes sends to it, opens, replies and pulls its mail out of spam, on a ramp to the daily volume you set, weekdays 8am to 6pm. action start (run it again to change volume, ramp or timezone), pause, resume or stop. Charged per inbox per 30 days by daily volume; progress is free with email.warmup_status.	Mailivery	$9.328per inbox month
Warm-up progressemail.warmup_status	How your inbox warm-ups are doing. Without inbox_id: every warm-up with its status, daily volume and ramp-up day. With inbox_id: that inbox's health grade (SPF, DMARC, MX, domain age) and where its warm-up mail landed over the last 14 days, inbox or spam. Free.	Mailivery	freeper call
Send emailemail.send	Send an email from one of your inboxes, or reply within a thread, with file attachments when needed (a deck, a PDF: by public https url, or inline as base64). You are the sender of record: consent and unsubscribe handling are yours.	AgentMail	$0.004per email
Read inboxemail.messages	Messages in one of your inboxes, newest first, sent and received alike: a 200-character preview each, with direction and a bounced flag (a hard bounce is a label on your own sent message). Pass message_id to read one message in full. Poll it after a send.	AgentMail	$0.002per read
Your inboxes and domainsemail.inboxes	The sending domains and inboxes this workspace already owns, with each domain's verification status and each inbox's inbox_id. Free. Run it before creating an inbox or sending, so you reuse what exists.	AgentMail	freeper call

Every tool has a page with its input schema, its output fields and the price on each provider. Browse the whole catalog or see how plans lower every price.

In practice

What do you ask it?

You do not call tools by name. You describe the job, and the agent finds the tools, shows the price and runs them.

Set me up for cold email from zero: find a domain close to ours, register it, create three inboxes and start warming them.

domain.search domain.register domain.dns email.inbox email.warmup

Send this three-step sequence to the 200 verified contacts on my list, 30 a day per inbox.

email.send

Read the replies from this week and tell me who is interested.

email.messages

Connect

How do you connect it?

One MCP server for Claude, ChatGPT, Claude Code, Codex and Cursor, or the same calls over the CLI and REST. The example runs domain.search.

MCP server

claude mcp add --transport http routergrowth https://api.routergrowth.com/mcp

CLI

npm install -g routergrowth && routergrowth setup
routergrowth run -c domain.search -i '{"name": "getacme", "tlds": ["com", "io"]}'

REST

curl -X POST https://api.routergrowth.com/v1/run \
  -H "Authorization: Bearer $ROUTERGROWTH_API_KEY" \
  -d '{"capability": "domain.search", "input": {"name": "getacme", "tlds": ["com", "io"]}}'

In claude.ai and ChatGPT, add https://api.routergrowth.com/mcp as a connector and approve the workspace in the browser. Setup for every client.

Worth knowing

What should you know before you start?

Yours to keep

The domain is registered with you as the registrant contact and can be transferred to you, and the inboxes belong to your workspace. You are the sender of record.

Warm-up before volume

A network of real mailboxes exchanges mail with each inbox on a ramp. email.warmup_status shows where that mail landed, inbox or spam.

A separate domain on purpose

Cold sequences go out from a second domain so your main one keeps its reputation.

Workflows

What do people build with it?

Complete jobs that call these tools, each with the prompt to paste and the cost of a run.

WorkflowEmail finance leaders at UK companies hiring accountantsPrompt, stages and cost → WorkflowReach sales leaders at companies hiring SDRsPrompt, stages and cost → WorkflowBook demos with CTOs at SaaS companies that just raised a Series APrompt, stages and cost → WorkflowEmail founders of seed-stage startups that raised this quarterPrompt, stages and cost → WorkflowReach founders of Shopify stores with 50 to 500 employeesPrompt, stages and cost → WorkflowReach RevOps leaders at companies that use HubSpotPrompt, stages and cost → GuideCold email infrastructure: domains, DNS, inboxes and warm-up from one APIRead the guide → GuideInstantly MCP: what the official server does, how to connect it, and an alternative for agents starting from zeroRead the guide → SkillCold email pipelineResearch, list, grade, verify, write, send. A directives folder holds the ICP and the copy rules; two human gates hold the sends.Install the skill → SkillSDR dailyOne day of the loop: triage replies, keep the suppression list, send the follow-ups due, drip the next first-touch emails, write the briefing.Install the skill →

Hiring signals workflows Funding signals workflows Technology signals workflows Every workflow

FAQ

Questions about cold email with an AI agent

What tools do I need for cold email?

A sending domain, inboxes on it, warm-up, a sender and a way to read replies. Here they are capabilities on one key, so an agent sets the whole thing up and runs it.

Can an AI agent buy a domain and set up inboxes?

Yes. domain.search finds an available name, domain.register buys it, domain.dns writes the records and email.inbox creates the mailboxes.

How does email warm-up work?

email.warmup enrols an inbox in a network of real mailboxes that send to it, open, reply and move its mail out of spam, ramping to the daily volume you set.

How many emails can I send a day?

The usual practice is about 30 a day per warmed inbox. The agent adds inboxes to reach the volume you need.

Who is responsible for consent and unsubscribes?

You are. The mail goes out from your domain and your inboxes, and the rules that apply to your recipients are yours to follow.