You find a CEO's email by looking it up in a data source first and guessing from a name pattern only when the lookup is empty. A lookup returns an address someone has already checked. A guess is a coin flip that you must verify.
CEO addresses come from four places. A data provider holds a work address it collected and checked. A company site or press page lists a shared inbox, which is rarely the CEO's own. A name pattern gives you a guess. A personal address sits in some records but is a poor fit for business outreach.
Only the first is worth building a process around. The other three are fallbacks, and the order of this guide follows that ranking.
This guide uses the LeadOcean API. Every step has a request you can run.
TL;DR
- It takes about 15 minutes to size the audience, find one CEO's address and check its status.
- The walkthrough spends about 4 records: up to 3 from the search and 1 from the reveal. Counts are free.
- Send only to
verified,catch_all_validorcatch_all. Anything you guessed gets verified first.
Prerequisites
- A LeadOcean API key from app.leadocean.io. The free plan has 1,000 records, one-off, and no card.
- The key in your shell as
$LEADOCEAN_API_KEY. curlandjq.- A target company domain. The examples use
acme.com.
export LEADOCEAN_API_KEY="paste-your-key-here"Step 1: Size the CEO audience for free
Count how many CEOs you can mail before you spend a record. Send count=true and limit=1 as query parameters. Arrays go comma-separated.
curl -s -G https://api.leadocean.io/v1/people/search \
-H "x-api-key: $LEADOCEAN_API_KEY" \
--data-urlencode "title=CEO,Chief Executive Officer" \
--data-urlencode "jobLevel=C-Team" \
--data-urlencode "salesRegion=EMEA" \
--data-urlencode "emailStatus=verified,catch_all_valid,catch_all" \
--data-urlencode "count=true" \
--data-urlencode "limit=1" | jq '.meta | {total, totalIsExact, countOnly}'salesRegion takes NORAM, LATAM, EMEA or APAC. Swap in country=DE for one market. REST meta.total stops at 100,000, so a big region comes back as a floor with totalIsExact false.
Step 2: Find the CEO at your target company
Search by company domain and title. The search returns a thin row with no address in it. The row carries a person_id and flags that say whether we hold an email.
curl -s https://api.leadocean.io/v1/people/search \
-H "x-api-key: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"domain": ["acme.com"],
"title": ["CEO", "Chief Executive Officer"],
"jobLevel": ["C-Team"],
"limit": 3
}' | jq '.data[] | {person_id: .meta.source_ids.person_id, contact_data}'Each person returned costs 1 record. Keep limit small. Title values are keywords, so a few rows may be co-founders or deputy titles. Check the title before you pick one.
Small companies often list the top person as founder or owner, not CEO. For those, swap the title filter for "seniority": ["founder", "owner"]. Sizing with count=true first shows you which version returns people.
Step 3: Reveal the address
Send the person_id to enrich with reveal_email set to true. Enrich takes exactly one of linkedin_url, email, phone or person_id. There is no name plus domain lookup, which is why Step 2 comes first.
curl -s https://api.leadocean.io/v1/people/enrich \
-H "x-api-key: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"person_id": "PERSON_ID_FROM_STEP_2", "reveal_email": true}' \
| jq '.data.contact_data | {email_status, contact_emails}'This costs 1 record. A person we hold nothing for is a 404 and costs nothing. If you only want a deliverable work address, GET /v2/people/email/work with the same person_id returns one current-employer address or null. It costs 1 record per call, even when it finds nothing.
Step 4: Read the status before you send
The status says how far to trust the address. verified was tested. catch_all_valid means we confirmed the mailbox on a domain that accepts everything. catch_all means the domain accepts everything and the mailbox is unproven.
curl -s https://api.leadocean.io/v1/people/enrich \
-H "x-api-key: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"person_id": "PERSON_ID_FROM_STEP_2", "reveal_email": true}' \
| jq -r '.data.contact_data
| select(.email_status | IN("verified","catch_all_valid","catch_all"))
| .contact_emails[0].email'Empty output means the status failed the filter. LeadOcean gives no refund for bounced emails, so this check is the only protection you have. Treat catch_all as sendable at low volume, not as proof.
Step 5: Fall back to a name pattern
When the data holds no address, build candidates from the CEO's name and the company domain. Most small companies use one of four shapes. Pick the one you can confirm from a known address at the same company.
| Pattern | Example for Jane Doe at Acme |
|---|---|
| first | jane@acme.com |
| first.last | jane.doe@acme.com |
| first initial, last | jdoe@acme.com |
| first initial dot last | j.doe@acme.com |
first="jane"; last="doe"; domain="acme.com"
printf '%s\n' "$first@$domain" "$first.$last@$domain" "${first:0:1}$last@$domain" "${first:0:1}.$last@$domain"Guessing is the weakest route for a CEO. An executive can use a short first-name address or an alias, so a pattern that works for staff may miss them. Never send to a candidate you have not verified. Run each one through an email verifier you trust first. A domain that accepts all mail cannot confirm any single mailbox, so a guess there stays a guess.
What you get
Step 1 is free. We ran it on 2026-10-01 for each sales region with leadocean_count_leads. The counts are mailable CEOs (verified, catch_all_valid or catch_all, the tool default), not every CEO we hold. The title filter is CEO or Chief Executive Officer with job level C-Team.
| Region | Mailable CEOs | Exact |
|---|---|---|
| NORAM | 497,174 | Yes |
| EMEA | 172,827 | Yes |
| APAC | 80,890 | Yes |
| LATAM | 34,034 | Yes |
The REST call in Step 1 would show the first two rows as a 100,000 floor. The MCP tool reported exact totals on the run date.
A revealed person comes back in the shape below. This is the response shape from the API reference, with placeholder values.
{
"success": true,
"data": {
"profile_data": { "...": "name, title, company" },
"contact_data": {
"has_email": true,
"email_status": "verified",
"email_type": "work",
"contact_emails": [
{ "email": "jane.doe@acme.com", "type": "work", "status": "verified" }
]
}
}
}Troubleshooting
| Error | Cause | Fix |
|---|---|---|
| 401 | The x-api-key header is missing, or the key is wrong or revoked. | Copy a fresh key from the app and reload $LEADOCEAN_API_KEY. |
| 402 | Your records are spent. On Free the 1,000 are a one-off allowance and do not reset. | Check GET /v1/account, or move to a paid plan. |
| 429 | Above your plan's rate limit: 5 requests a second on Free, 50 on Solo, 200 on Agency. | Wait the Retry-After seconds and retry. |
| Empty results | A filter value is not an exact enum string, such as Chief for C-Team. | Call leadocean_list_enum_values for job_level and pass the exact string. |
| 404 on enrich | We hold nothing for that person. | Nothing was charged. Try another person_id or fall back to Step 5. |
| Export refused | Bulk CSV export is not on Free, and one export is capped at 50,000 rows a request and 500,000 rows a day. | Split the job across requests and days, or narrow the filters. |
FAQ
Is it legal to email a CEO you do not know?
Rules differ by country, and this guide is not legal advice. Check the law where your recipient sits and keep your message relevant to their role. Ask your own counsel about anything in doubt.
Why does the search not show the email?
Search returns a thin row with flags such as has_email and email_status. The address comes from enrich with reveal_email set, and that call costs 1 record.
How many CEOs can I get on the free plan?
You have 1,000 records, one-off. Each CEO costs about 2: 1 from search and 1 from the reveal. That is roughly 500 CEOs, minus any 404s that cost nothing.
Can I pull a whole region at once?
Yes. The Exports page in the app takes the same filters, shows the record price before you start, and gives you a CSV. POST /v1/exports does the same by API, up to 50,000 rows a request. Bulk CSV export is not on Free: it starts on Solo at $97 a month.
What if the CEO uses a personal address?
Enrich can return a personal address when we hold one, flagged by email_type. Work addresses are the safer default for business outreach. Filter on email_type before you send.
For the same recipe on other titles, see VP of Sales, VP of Marketing and VP of Engineering. More recipes live in the blog hub. Plans are on pricing.
Size your CEO list free, then pull verified addresses
Free to start. No credit card. 1,000 records to spend whenever you like.
Get your free API key →