Paste one prompt into Claude with LeadOcean connected and size your Series A founder 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 founders at Series A startups.
1. Call leadocean_list_enum_values for funding_type and confirm Series A.
2. Call leadocean_count_leads with title Founder and Co-Founder,
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 | Founder, Co-Founder |
| 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
313,299 mailable people matched on 2 October 2026. Filters: title Founder or Co-Founder, 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 in the same call break the total down by country, industry and company size, so ask Claude for them before you search.
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 |
|---|---|---|---|
| Co-Founder | 11-50 | Software Development | US |
| Founder | 51-200 | Financial Services | GB |
| Co-Founder and CEO | 11-50 | Technology; Information and Internet | CA |
Variations
- Add "only people in country US" to build a single-market list.
- Swap the title line for "CEO" to reach founders who list only that title.
- Change the funding line to "fundingType Seed" and ask Claude to search with a limit of 25.
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 CTOs at Series A startups
More prompts live in the prompts hub.
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