Paste one prompt into Claude with LeadOcean connected and get a sized list of agency CTOs 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 CTOs at 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 title Chief Technology Officer and CTO,
jobLevel C-Team, 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 |
|---|---|
| title | Chief Technology Officer, CTO |
| jobLevel | C-Team |
| 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
1,750 mailable people matched on 2 October 2026. Filters: title Chief Technology Officer or CTO, jobLevel C-Team, 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 430 sit at companies with 1-10 employees and 612 at 11-50. At a shop that small the CTO is often a co-founder, and 257 of the 1,750 carry the owner seniority, so set employeeRange before you write copy. By industry, 1,417 of the 1,750 sit under Advertising Services.
What you get back
Search rows carry the fields below. These are placeholder values, not real records.
| Title | Company size | Industry | Country |
|---|---|---|---|
| Chief Technology Officer | 51-200 | Advertising Services | US |
| CTO | 11-50 | Marketing Services | US |
| Chief Technology Officer | 201-500 | Marketing and Advertising | US |
Variations
- Add "only companies with employeeRange 51-200 and 201-500" to skip owner-run shops.
- Swap the title filter for jobFunction Engineering or Information Technology and jobLevel VP to reach technology VPs.
- 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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