Paste one prompt into Claude with LeadOcean connected and get a sized list of agency owners before you spend a single record. Connect the server at https://api.leadocean.io/mcp first. Setup is on the MCP page.
The prompt
Find owners of marketing and advertising agencies in the United States.
1. Call leadocean_list_enum_values for industry and pick the marketing
and advertising agency values.
2. Call leadocean_count_leads with seniority owner, those industries
and country US.
3. Tell me the count and the filters you used.
4. Do not call leadocean_search_leads until I say go.What it resolves to
| Filter | Value |
|---|---|
| seniority | owner |
| industry | Advertising Services, Marketing Services, Marketing and Advertising |
| country | US |
"Agency" is not an industry value, so the prompt maps it to the three marketing and advertising strings. Enum values are exact strings, which is why step 1 looks them up.
How many match
63,227 mailable people matched on 2 October 2026. Filters: seniority owner, industry Advertising Services, Marketing Services or Marketing and Advertising, country US.
Mailable means verified, catch_all_valid or catch_all, the count_leads default. The count is free. The facets show 35,171 of them sit at companies with 1-10 employees and 15,161 at 11-50. Add employeeRange before you write copy if you want to skip solo operators. Adding seniority founder returned the same 63,227 on 2 October 2026, because founders fall in the owner band.
What you get back
Search rows carry the fields below, one row per person. These are placeholder values, not real records.
| Title | Company size | Industry | Country |
|---|---|---|---|
| Owner | 1-10 | Advertising Services | US |
| Agency Owner | 11-50 | Marketing Services | US |
| Owner and President | 51-200 | Marketing and Advertising | US |
Variations
- Add "only companies with employeeRange 11-50 and 51-200" to skip one-person shops.
- Add "title Managing Director" in place of seniority to reach agency heads who do not carry the owner band.
- Change country to GB and ask Claude to count again before searching.
Records it spends
The count and enum lookups 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
More prompts live in the prompts hub.
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