How to Detect B2B Buying Signals With Claude

One prompt turns a recent funding round into a sized list of sales leaders to contact, before you spend a record. Connect Claude to https://api.leadocean.io/mcp first. Setup is on the MCP page.

LeadOcean holds firmographic signals: last funding year, headcount band, role and detected technology. It does not hold intent data such as page visits or ad clicks. Read what a buying signal is and how to act on one before you build outreach.

The prompt

Find buying signals for a sales-tool vendor in the US.
1. Call leadocean_list_enum_values for job_level, job_function and employee_range
   and use the exact strings.
2. Call leadocean_count_leads with minLastFundingYear 2025, employeeRange
   51-200 and 201-500, jobLevel C-Team and VP, jobFunction
   Sales & Business Development, country US. Pass facets false.
3. Tell me the count, the date and the filters you used.
4. Do not call leadocean_search_leads until I say go.

What it resolves to

Funding in the last two years is the signal. Fresh money at a 51 to 500 person company usually means new sales hires and new tooling. The prompt does not pass fundingType, because the count tool does not support it. Add it at search time to narrow the list.

How many match

259 mailable people matched on 1 October 2026. Filters: minLastFundingYear 2025, employeeRange 51-200 and 201-500, jobLevel C-Team and VP, jobFunction Sales & Business Development, country US.

Mailable means verified, catch_all_valid or catch_all, the count_leads default. The count is free. The same filters with minLastFundingYear 2026 returned 0 on that date, so use 2025 as the floor.

What you get back

Search rows carry the fields below, plus name, email status and company domain. These are placeholder values, not real records.

Variations

• Swap the buyer: "jobFunction Human Resources, jobLevel Director and VP" to target people leaders at funded companies.
• Add a technology signal: "technologies Salesforce" to keep only funded companies running that CRM.
• Widen the window: "minLastFundingYear 2024" and ask Claude to count again before searching.

Records it spends

The enum lookups and the count are free. leadocean_search_leads costs 1 record per person returned, so a limit of 25 costs 25 records. Ask Claude to confirm the cost before it runs the search. Free gives you 1,000 records one-off with no card. Pro is $499 a month. See pricing.

Related prompts

• Find buying intent signals for B2B
• Monitor startup growth signals
• Use intent signals for outbound

More prompts live in the prompts hub.