Validates email addresses by checking format compliance and active-or-inactive status. Ithelps sales teams, recruiters and marketers confirm email authenticity, lower bounce ratesand boost cold-outreach performance. This indispensable tool delivers CRM data cleansing,candidate screening, supplier verification and email-list scrubbing. It works for pre-sendcleanup before bulk foreign-trade email campaigns, recruitment background checks and buyervalidation.

SKILL.md

---
name: email-validity-check
description: "Verify email validity and format, cut email bounce‑rates and clean contact lists for exporters, recruiters and B2B sales teams.\n\nTrigger: email address validation, reduce email bounce rate, email‑list scrubbing, CRM data cleansing, cold outreach optimization"
metadata: {"version":"1.0.1","homepage":"https://www.upkuajing.com","clawdbot":{"emoji":"📧","requires":{"bins":["python"],"env":["UPKUAJING_API_KEY"]},"primaryEnv":"UPKUAJING_API_KEY"}}
---

# Email Validity Check

Check email address validity and status using the Open Platform API.

## Overview

This skill provides access to email validity detection through a single interface:
- **Email Validity Check** (`email_validity_check.py`): Check email address validity

## Running Scripts

### Environment Setup

1. **Check Python**: `python --version`
2. **Install dependencies**: `pip install -r requirements.txt`

Script directory: `scripts/*.py`
Run example: `python scripts/*.py`

**Important**: Always use direct script invocation like `python scripts/email_validity_check.py`. **Do NOT use** shell compound commands like `cd scripts && python email_validity_check.py`.

## Email Validity Check (`email_validity_check.py`)

Check email address validity.

**Parameters**: See [Email Validity API](references/email-api.md)

**Examples**:
```bash
# Check single email
python scripts/email_validity_check.py --emails "test@example.com"

# Check multiple emails
python scripts/email_validity_check.py --emails "test@example.com valid@gmail.com invalid-email"
```

## API Key and Account

- **API Key**: Stored in `~/.upkuajing/.env` file as `UPKUAJING_API_KEY`
- **First check**: If not set, prompt user to provide or apply at [Open Platform](https://developer.upkuajing.com/)

### **API Key Not Set**
First check if the `~/.upkuajing/.env` file has UPKUAJING_API_KEY;
If UPKUAJING_API_KEY is not set, prompt the user to choose:
1. User has one: User provides it (manually add to ~/.upkuajing/.env file)
2. User doesn't have one: Guide user to apply at [Open Platform](https://developer.upkuajing.com/)
Wait for user selection;

### **Account Top-up**
When API response indicates insufficient balance, explain and guide user to top up:
1. Create top-up order (`auth.py --new_rec_order`)
2. Based on order response, send payment page URL to user, guide user to open URL and pay, user confirms after successful payment;

### **Get Account Information**
Use this script to get account information: `auth.py --account_info`

## Fees

**Email validity check API calls incur fees**.
**Latest pricing**: Users can visit [Detailed Price Description](https://www.upkuajing.com/web/openapi/price.html)
Or use: `python scripts/auth.py --price_info` (returns complete pricing for all interfaces)

### Fee Confirmation Principle

**Any operation that incurs fees must first inform and wait for explicit user confirmation. Do not execute in the same message as the notification.**

## Workflow

### Decision Guide

| User Intent | Use API |
|-------------|---------|
| "Verify email address exists" | Email Validity Check |

## Error Handling

- **API key invalid/non-existent**: Check `UPKUAJING_API_KEY` in `~/.upkuajing/.env` file
- **Insufficient balance**: Guide user to top up
- **Invalid parameters**: **Must first check the corresponding API documentation in references/ directory**, get correct parameter names and formats from documentation, do not guess

### API Documentation Reference

- Email Validity: Check [references/email-api.md](references/email-api.md)

## Notes

- File paths use forward slashes on all platforms
- **Do not guess parameter names**, get accurate parameter names and formats from documentation
- **Prohibit outputting technical parameter format**: Do not display code-style parameters in responses, convert to natural language
- **Do not estimate or guess fees** — use `python scripts/auth.py --price_info` to get accurate pricing information

## Related Skills

Other skills you might find useful:

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- global-company-person-search — Search people from the global company database
- linkedin-company-search — Search companies from the LinkedIn source
- global-company-search — Search companies from the global company database
- global-company-shareholder — Query shareholder list from the global company database
- global-company-employee — Query employee list from the global company database
- global-company-person-colleague — Query colleague list from the global company database
- global-company-person-alumni — Query alumni list from the global company database
- global-company-person-experience — Query work experience list from the global company database
- global-company-person-education — Query education history list from the global company database
- global-company-person-school-detail — Query school detail from the global company database
- upkuajing-global-company-people-search — Global company and people search
- upkuajing-customs-trade-company-search — Search customs trade companies
- upkuajing-map-merchants-search — Map-based merchant search
- upkuajing-email-tool — Send emails and manage email tasks
- upkuajing-sms-tool — Send SMS and manage SMS tasks
- upkuajing-contact-info-validity-check — Check contact info validity
- phone-validity-check — Check phone number validity
- email-validity-check — Check email address validity
- domain-validity-check — Check domain validity and security