Email Tools

SMTP-verified professional email finding

The Email category is the email-finding surface. get_email takes a person’s name and a company domain, generates every common pattern (first@, first.last@, flast@, f.last@, etc.), and confirms the real mailbox without sending mail.

get_email requires the GTM Tools browser extension to be connected. It confirms Google Workspace mailboxes — the largest provider — through a logged-in Google session shared via the extension. If no session is connected, the tool returns setup instructions instead of running. Install it and press Connect once per workspace.

Tools

ToolTokensDescription
ping0Health check
get_email5Get a person’s professional email (SMTP-verified)

get_email

ParameterTypeRequiredDescription
namestringYesFull name of the person (e.g. "Justin Mares")
domainstringYesCompany domain (e.g. "kettleandfire.com")
input_parametersobjectNoFree-form metadata echoed back in the response (useful for batch processing)
$curl -X POST https://api.gtm-tools.sh/api/v0/get_email \
> -H "Authorization: Bearer $GTM_TOOLS_API_KEY" \
> -H "Content-Type: application/json" \
> -d '{
> "name": "Justin Mares",
> "domain": "kettleandfire.com",
> "input_parameters": {"source": "linkedin"}
> }'
1{
2 "email": "justin@kettleandfire.com",
3 "is_catch_all": false,
4 "domain": "kettleandfire.com",
5 "input_parameters": {"source": "linkedin"}
6}

Response fields

FieldTypeDescription
emailstring | nullThe verified deliverable email, or null if no candidate verified
is_catch_allbooleantrue if the domain accepts mail at any address — treat the result with caution
domainstringEchoes back the input domain
input_parametersobjectEchoes back the input metadata (for batch correlation)

When is_catch_all is true

Catch-all domains accept SMTP traffic for every local-part, so verification can’t disambiguate the true address. The response still returns the most likely candidate (by pattern frequency) but you should:

  • Treat the result as a hypothesis, not a certainty.
  • Cross-check with LinkedIn or a recent press mention before sending.
  • Consider whether deliverability is enough or you need an actual reply to confirm the address.

How verification works

get_email does three things:

  1. Generate candidates. Every common pattern is produced from the name (justin@, justinmares@, justin.mares@, j.mares@, jmares@, etc.).
  2. Verify via SMTP. Each candidate is probed against the domain’s MX records: the verifier speaks SMTP, issues RCPT TO, and observes the server’s response — without DATA, so no mail is ever sent.
  3. Return the first deliverable hit. Catch-all domains are detected by sending a known-bogus address; if it accepts, is_catch_all is set to true.

This adds 2–5 seconds of latency per call.

Next steps