# Reckon

Real-time email verification API for developers and small teams.

Reckon checks whether an email address is valid and deliverable 
before it enters your system — at the point of signup, form submission, 
or API call. Single-address, real-time verification only. No bulk 
list processing.

## What it does

- Validates syntax (RFC standard), including plus-address detection
- Checks domain and MX records
- Detects disposable/temporary email addresses
- Detects role-based addresses
- Identifies accept-all (catch-all) domains
- Verifies mailbox existence via SMTP
- Returns a clear top-line determination with additional context
- If Reckon can't return a clear answer, you don't pay for that check

## Who it's for

Soloprenuers and small teams who need to stop bounces at the source.
Common use cases: SaaS signup flows, lead capture forms, CRM data 
quality, cold outreach list cleanup.

## Pricing

Subscription plans with monthly credits included. No credit card 
required for trial. Credit rate decreases at higher tiers.

- Starter:  $12/mo — 1,000 credits @ $0.007 each
- Standard: $18/mo — 2,000 credits @ $0.0065 each
- Growth:   $35/mo — 5,000 credits @ $0.006 each
- All plans: optional overage spending with caps

Credits expire at the end of each billing cycle.
Full pricing: https://reckonapp.io/pricing

## API

REST API. JSON requests and responses. API key authentication via 
X-API-Key header. Two key types: public (pk_) for client-side use, 
secret (sk_) for server-side use.

Documentation: https://api.reckonapp.io/docs

## Integrations

- REST API (any language or platform)
- MCP server (use Reckon from Claude, Cursor, or any MCP-compatible 
  AI assistant)
- Zapier

## MCP Integration

Reckon publishes an MCP (Model Context Protocol) server, listed in 
Anthropic's MCP directory. This allows AI assistants to verify email 
addresses directly in chat — useful for automated workflows and 
agentic applications that handle email data.

MCP server: https://mcp.reckonapp.io/mcp

## Links

- Homepage: https://reckonapp.io
- How it works: https://reckonapp.io/how-it-works
- API docs: https://api.reckonapp.io/docs
- Pricing: https://reckonapp.io/pricing
- Sign up: https://app.reckonapp.io/signup
- Help center: https://support.reckonapp.io