API reference / Email verification

Find an email address

Written and maintained by The ProspectAPIs team

POST/v1/email/find

POST /v1/email/find is the ProspectAPIs operation emailFind, in the Email verification group of the REST API. Checks the common company patterns for a person against the mail server, most common first, and returns the first that is valid. $0.02 only when an address is found; nothing found, a catch-all domain (best_guess, unconfirmed) or an unknown answer is free. Cost: $0.02 per found address; nothing found or catch-all is free. Send your API key as a Bearer token in the Authorization header.

How this fits with the rest of the email verification API, with worked examples, is in the email verification guide.

Parameters

Request body

JSON (EmailFindRequest).

{
  "first_name": "first name",
  "domain": "acme.com"
}

Responses

Every error answers with the same JSON body, an error string and sometimes a code; the errors page lists each status and when it happens. A per-key 429 carries Retry-After; see rate limits.

200 response fields

The result. The body is a EmailFindResult.

Code samples

Each sample sends the same request. Set PROSPECTAPIS_KEY in your environment first. Values come from the spec's examples; replace them with your own.

curl -X POST https://api.prospectapis.com/v1/email/find \
  -H "Authorization: Bearer $PROSPECTAPIS_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "first_name": "first name", "domain": "acme.com" }'

const res = await fetch("https://api.prospectapis.com/v1/email/find", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.PROSPECTAPIS_KEY}`, "Content-Type": "application/json" },
  body: JSON.stringify({
    "first_name": "first name",
    "domain": "acme.com"
  }),
});
if (!res.ok) throw new Error(`${res.status}: ${(await res.json().catch(() => ({}))).error ?? res.statusText}`);
const data = await res.json();
console.log(data);

import os, requests

res = requests.post(
    "https://api.prospectapis.com/v1/email/find",
    headers={"Authorization": f"Bearer {os.environ['PROSPECTAPIS_KEY']}"},
    json={
        "first_name": "first name",
        "domain": "acme.com",
    },
    timeout=30,
)
res.raise_for_status()
data = res.json()
print(data)

Billing

Billing reserves before it serves: the call holds what it may cost, serves at most what that hold covers, and refunds the rest when the response closes. Any non-2xx answer refunds the whole hold, so a failed call costs nothing. The response reports your balance in X-Credits-Remaining.

Related

The email verification guide covers this area end to end. Previous operation: Report what happened when you sent. Next operation: Look up an email domain. Every operation, grouped by area, is on the API reference index.

Create a free account to get a key, then run the samples above with your own values (this call acts for real, so use real inputs).