Paste one prompt into Claude, or any MCP client, with LeadOcean connected and get a sized list of agency owners whose site runs Webflow. Connect https://api.leadocean.io/mcp first. Setup is on the MCP page.
The prompt
Find owners and founders of US marketing and advertising agencies
whose website runs Webflow.
1. Call leadocean_list_enum_values for industry and pick the marketing
and advertising agency values.
2. Call leadocean_count_leads with technologies Webflow, those
industries, seniority founder and owner, 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 |
|---|---|
| technologies | Webflow |
| industry | Advertising Services, Marketing Services, Marketing and Advertising |
| seniority | founder, owner |
| country | US |
"Agency" is not an industry value, so the prompt maps it to three marketing and advertising strings. The technologies filter matches a technology detected on the company website.
How many match
248 mailable people matched on 2 October 2026. Filters: technologies Webflow, industry Advertising Services, Marketing Services or Marketing and Advertising, seniority founder or owner, country US.
Mailable means verified, catch_all_valid or catch_all, the count_leads default. The count is free. Technology data covers about 7.8M crawled sites, so this is a floor, not every Webflow agency. All 248 carry the owner band, and 139 sit at companies with 1-10 employees.
What you get back
Search rows carry the fields below. These are placeholder values, not real records.
| Title | Company size | Industry | Country |
|---|---|---|---|
| Owner | 1-10 | Advertising Services | US |
| Founder and Creative Director | 11-50 | Marketing Services | US |
| Owner | 51-200 | Marketing and Advertising | US |
Variations
- Change "whose website runs Webflow" to "whose website runs Shopify" and count again.
- Add "only companies with employeeRange 11-50 and 51-200" to skip solo studios.
- Swap seniority for "jobFunction Advertising & Marketing and jobLevel Director" to reach the marketing leads instead of owners.
Records it spends
The enum lookup and leadocean_count_leads 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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