How to find verified B2B leads with Claude

You can find verified B2B leads with Claude by connecting Aculio to it once. Then ask in plain English for a role, a company profile and a count, and Claude returns real people, each with a verified work email and the reason they match.

What you need

• An Aculio account. Sign up here. Aculio has no free tier, so you pick a plan first. See pricing.
• Claude: the Claude app (web, desktop or mobile) or Claude Code.

Step 1: Connect Aculio to Claude

In the Claude app, it takes three clicks:

1. Open Settings, then Connectors, and click Add custom connector.
2. Name it Aculio and paste this URL: https://aculio.com/mcp
3. Click Connect, sign in to Aculio and click Allow.

In Claude Code (or Codex, Cursor and other coding agents), you don't need to type any commands. Paste this message and the agent sets Aculio up for you:

Set up Aculio for me by following the instructions at https://aculio.com/agent-setup. Do the technical steps yourself and only ask me to sign in.

When a browser window opens, sign in to Aculio and click Allow. No API key is needed either way. More detail is in the setup guide.

Step 2: Check your credits

Ask Claude how many credits you have left. Claude calls the get_credits tool and shows your plan and remaining verified leads. One credit is one verified lead.

Plans:

• Starter: $49 per month for 250 verified leads. Extra leads are $0.25 each.
• Growth: $149 per month for 1,000 verified leads. Extra leads are $0.18 each.
• Scale: $399 per month for 3,500 verified leads. Extra leads are $0.12 each.

Step 3: Describe the leads you want

Write the request the way you would brief a researcher. Include the title, the company type, the place and the number. These are example prompts that work:

• "Get me 5 leads like linear.app"
• "Get me 20 Heads of Growth at Series A fintechs in Berlin"
• "Find CTOs at companies hiring their first SRE"
• "Get me founders who raised a seed round this month"

Claude passes the brief to the find_leads tool. That tool also accepts structured filters, including job titles, industries, technologies, countries, company size, companies hiring for a role and companies funded within a set number of days. Use the filters when you want a repeatable search.

Step 4: Find lookalikes of your best customers

If you already know which companies buy from you, give Claude their domains and ask for people at similar companies. Claude uses the find_lookalikes tool with those domains as the starting point. This is useful when your best customers share a profile that is hard to describe in a title filter.

Step 5: Check the results before you send

Every returned lead is a specific person with a work email that passed verification as deliverable. Some points to keep in mind:

• Rows without a deliverable email are not charged.
• If a delivered email hard-bounces, report it and the credit comes back.
• Aculio remembers every lead in your workspace. It skips people you have already received, contacted or suppressed, so you do not pay for the same person twice.
• You can ask Claude to check any single address with the verify_email tool before you add it to a sequence.

Step 6: Report outcomes so future searches improve

When you send, reply or book a meeting, tell Aculio. Claude can call report_outcome with one of these values: sent, replied, meeting, won, bounced or not_interested. You can also sync outcomes automatically from Instantly, Smartlead, HubSpot or Attio on the Growth plan and above. Aculio uses those outcomes to rank new leads toward the profiles and signals that got responses.

Using the REST API instead

If your workflow runs in code rather than in a chat, call the REST API with a bearer key:

curl -X POST https://aculio.com/api/v1/leads/search \
  -H "Authorization: Bearer $ACULIO_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "Heads of Growth at Series A fintechs in Berlin", "limit": 20}'

The response is predictable JSON, so you can write leads straight into a CRM or a sending tool. The full endpoint list is in the REST docs.

How this compares to a spreadsheet workflow

If you build enrichment tables by hand, tools such as Clay give you that control. If you want your agent to ask for leads and get verified results back, the MCP route above is shorter. Aculio does not send email, so you still choose the sending tool.