Paste one prompt into Claude with LeadOcean connected and size your Series A CTO list 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 Series A startups.
1. Call leadocean_list_enum_values for funding_type and confirm Series A.
2. Call leadocean_count_leads with title Chief Technology Officer and CTO,
jobLevel C-Team and employeeRange 11-50 and 51-200.
Leave fundingType out of the count.
3. Tell me the count and the filters you used.
4. Do not call leadocean_search_leads until I say go. When I do, add
fundingType Series A and search with a limit of 25.What it resolves to
| Filter | Value |
|---|---|
| title | Chief Technology Officer, CTO |
| jobLevel | C-Team |
| employeeRange | 11-50, 51-200 |
| fundingType | Series A (search only, not in the count) |
Enum values are exact strings, which is why step 1 looks them up. The count tool does not support fundingType, so the prompt counts without it and applies it at search time.
How many match
67,841 mailable people matched on 2 October 2026. Filters: title Chief Technology Officer or CTO, jobLevel C-Team, employeeRange 11-50 and 51-200.
This count is wider than your list. It covers every small company, not only Series A ones, so the fundingType filter at search time cuts it down. Mailable means verified, catch_all_valid or catch_all, the count_leads default. The count is free.
The facets show 23,153 of the 67,841 are in US, the largest country.
What you get back
Search rows carry the fields below, plus name, email status and company domain. These are placeholder values, not real records.
| Title | Company size | Industry | Country |
|---|---|---|---|
| Chief Technology Officer | 11-50 | Software Development | US |
| CTO | 51-200 | IT Services and IT Consulting | GB |
| Chief Technology Officer | 11-50 | Computer and Network Security | DE |
Variations
- Add "only people in country US" to build a single-market list.
- Swap the title line for "VP Engineering, jobLevel VP" to reach the layer under the CTO.
- Change the search-time line to "fundingType Series B" and keep step 4, so Claude still waits for your go.
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
- Find IT directors at Series A startups
- Find HR directors at Series A startups
- Find founders at Series A startups
More prompts live in the prompts hub.
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