How to Find Leads Using Firmographics With Claude

One prompt turns company size, industry and country into a sized lead list, and you see the count before you spend a record. Connect Claude to https://api.leadocean.io/mcp first. Setup is on the MCP page.

The prompt

Find sales leaders at US software companies with 51 to 500 employees.
1. Call leadocean_list_enum_values for industry and employee_range
   and pick the software and headcount values.
2. Call leadocean_count_leads with those industries, employeeRange,
   hqCountry US, jobLevel C-Team and VP, and jobFunction
   Sales & Business Development.
3. Tell me the count and the exact filters you used.
4. Do not call leadocean_search_leads until I say go.

What it resolves to

Enum values are exact strings. Software has seven industry values, so step 1 matters. Headcount is a bracket, which is cheaper than a min and max. Firmographics describe the company (industry, size, location). The title and level filters then pick the person inside it.

How many match

4,692 mailable people matched on 1 October 2026. Filters: industry Software Development or Computer Software, employeeRange 51-200 or 201-500, hqCountry US, jobLevel C-Team or VP, jobFunction Sales & Business Development.

Mailable means verified, catch_all_valid or catch_all, the count_leads default. The count is free. It leaves out the other five software industry values, so the real market is wider. Narrow further at search time with filters the count call does not accept, such as funding or revenue.

What you get back

Search rows carry the fields below. These are placeholder values, not real records.

Variations

• Add "technologies HubSpot" to keep only accounts that run your target CRM.
• Swap employeeRange for "1001-5000 and 5001-10000" and jobFunction for Finance & Accounting to reach enterprise finance leaders.
• Change hqCountry to GB and DE, ask Claude to count again, and compare the totals before searching.

Records it spends

The enum lookups and the count are free. leadocean_search_leads costs 1 record per person returned, so a limit of 25 costs 25 records. Free gives you 1,000 records one-off with no card. Pro is $499 a month. See pricing.

Related prompts

• Find ICP matched leads
• Find IT directors at HubSpot users
• Find HR directors at HubSpot users

More prompts live in the prompts hub.