Verification1 credit

verify_email

Verify a single email address

Real-time deliverability verdict for one email — valid / invalid / risky / unknown with detailed flags.

Get an API key + 100 free credits Connect the MCP server

When an agent uses verify_email

Use verify_email the moment an agent has a single address it is about to trust — a new signup, a form submission, a lead pulled from enrichment, or an address a user typed. It returns a deliverability verdict plus the signals an agent needs to branch on (disposable, role account, catch-all, MX, SMTP) so the agent can decide to accept, reject, or ask for a correction before sending or storing the address.

REST endpoint

GET /api/v1/verify?email={email}

Credit cost

1 credit

Input schema

Field	Type	Required	Description
`email`	string	required	The email address to verify, e.g. lead@example.com.

Call it over MCP

An MCP client invokes the tool with a tools/call request. Hosted clients send this to https://verifly.email/mcp with your Authorization: Bearer vf_… header; the verifly-mcp-server package does the same with VERIFLY_API_KEY set.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "verify_email",
    "arguments": {
      "email": "lead@example.com"
    }
  }
}

Posting that same call straight to the hosted endpoint:

curl -s -X POST "https://verifly.email/mcp" \
  -H "Authorization: Bearer vf_your_api_key" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"verify_email","arguments":{"email":"lead@example.com"}}}'

Equivalent raw REST call

Under the hood this tool calls GET /api/v1/verify?email={email}. If you are not using MCP, hit the REST API directly:

curl -s "https://verifly.email/api/v1/verify?email=lead@example.com" \
  -H "Authorization: Bearer vf_your_api_key"

What you get back

A JSON object with is_valid, result (deliverable / undeliverable / risky / unknown), reason, a recommendation (safe_to_send / do_not_send), a details block of boolean flags, and the credits used / remaining.

Required input: email.

Related tools

verify_batch

Synchronously verify a small list (up to a few hundred) and get a verdict per address in one call.

Open check_domain_health

Inspect a domain’s MX, SPF, and DMARC records and overall health score. Free, no mailbox check.

Open submit_bulk

Queue a large list (up to 1M) as an async job — returns a job_id to poll. Optional completion webhook.

Open

Use verify_email in your agent

Verifly is the only email verifier with a hosted MCP server plus autonomous agent self-registration. An agent can call register_account for an instant key and 100 free credits, then start calling verify_email — no human, no dashboard.

Connect the MCP server Read the agent guide