Reckon Email Verification
@reckonapp
Enterprise-grade, real-time email verification in a straightforward way. Prevent bounces by checking any email against format rules, DNS records, disposable address lists, catch-all detection, and live SMTP—and get back a structured result your agent can act on immediately.
Overview
What is Reckon Email Verification?
Reckon Email Verification is an MCP server that verifies email addresses in real-time directly from AI clients like Claude, ChatGPT, Cursor, or Windsurf. It is powered by Reckon and designed for users needing deliverability checks, format validation, domain info, and risk flagging.
How to use Reckon Email Verification?
Connect by adding the endpoint https://mcp.reckonapp.io/mcp in your MCP client's settings, then sign in with your Reckon account via OAuth when prompted. For clients without OAuth support (like Cursor), use an API key in the X-API-Key header within the client's MCP configuration file. Requires a Reckon account with an active subscription and a positive credit balance.
Key features of Reckon Email Verification
- Real-time email verification via MCP-compatible AI clients
- Returns deliverability status, format validity, and domain info
- Risk flags for disposable, role-based, accept-all, and more
- Each
verify_emailcall consumes one credit - Built-in
check_creditstool for balance inquiries - Supports OAuth and API key authentication
Use cases of Reckon Email Verification
- Verify an email address directly within a conversation with Claude or ChatGPT
- Screen leads or user sign-ups for invalid or risky email addresses
- Audit mailing lists to reduce bounces and improve deliverability
FAQ from Reckon Email Verification
What is required to use Reckon Email Verification?
You need a Reckon account (comes with 25 free trial credits), an active subscription, and a credit balance above zero. Sandbox test email addresses are available cost-free.
How does authentication work?
Most MCP clients authenticate via OAuth—sign in with your Reckon account. For clients like Cursor that lack OAuth support, pass your API key via the X-API-Key header.
Where can I get an API key?
You can generate and manage API keys at app.reckonapp.io/api-keys.
What information does the verify_email tool return?
It returns the email address, status (valid/invalid), format validity, domain existence, accept-all flag, disposable flag, role-based flag, mailbox full flag, plus addressing flag, and domain metadata.
Are there any known limits or rate limits?
Each email verification consumes one credit, and you must maintain a positive balance. No other rate limits are documented in the README.
