email_find · REST + MCP

Find a person’s work email address

Find a person's work email address from their name and company website. Tries the usual patterns (first.last, flast, first, and so on), checks each one, and returns the first that is confirmed real, with how confident it is. Says so when the company accepts mail for any address and the guess cannot be confirmed. Use it to reach a specific person at a company.

$0.10 USD per successful paid call

This tool uses prepaid credit. Connect without a key and your agent will get a key and payment link when it needs this tool.

Charged only when a confirmed (deliverable) address is returned. Catch-all guesses, no match and domains without mail servers are free. Failed calls are free.

Connect your agent

Use it in your chat

Start with no key

In Claude.ai, Claude Desktop, Claude Code, ChatGPT or Codex, add a custom connector with this URL. No API key or Authorization header is needed.

https://unstuckapi.com/mcp

Try a few free calls a day with read_page, domain_check, domain_info, pdf_to_text, vulnerability_lookup, or paper_search. Each free result says how many are left and when they reset (midnight UTC).

A paid tool called without a key returns a new API key and a payment link instead of a result, and nothing is charged. In Claude, a Connect button opens the same payment page. Once credit is added, the agent can continue in the same chat with that key.

Already have a key?

If your connector cannot send headers, use this URL instead. Replace YOUR_API_KEY with your key.

https://unstuckapi.com/mcp?key=YOUR_API_KEY

Keep the completed URL private: it contains your API key.

Ask your agent to call email_find with these arguments:

{
  "first_name": "Jane",
  "last_name": "Smith",
  "domain": "example.com"
}

Inputs

Send these fields as a JSON object to POST /v1/tools/email_find.

Input fields for email_find
Field	Type	Description & limits
`first_name`	string Required	Person's first name.Minimum characters: 1 · Maximum characters: 60
`last_name`	string Required	Person's last name.Minimum characters: 1 · Maximum characters: 60
`domain`	string Required	Company domain, e.g. "acme.com".Minimum characters: 3 · Maximum characters: 253

Developer option: REST

Replace YOUR_API_KEY with your key. The following command makes a paid call if it succeeds.

export UNSTUCK_API_KEY="YOUR_API_KEY"

curl 'https://unstuckapi.com/v1/tools/email_find' \
  -H "Authorization: Bearer $UNSTUCK_API_KEY" \
  -H 'Content-Type: application/json' \
  --data '{"first_name":"Jane","last_name":"Smith","domain":"example.com"}'

The response contains result, charged_usd, and your remaining balance_usd. Invalid input and failed tool calls are not charged.

Developer option: MCP with a header

For clients that support headers, connect using Streamable HTTP and these values:

https://unstuckapi.com/mcp

Authorization: Bearer YOUR_API_KEY

Connection guide · Full JSON schemas and prices · Agent instructions