# verify_email

Verify whether an email address is valid and deliverable. Use this to validate user-provided email addresses during sign-up, form submission, or contact list cleaning. Checks syntax, domain validity, and whether the address is from a disposable email provider. Parameters: email — The email address to verify (required).

Agent View of the PolicyLayer registry record for `verify_email`. HTML page: https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/verify-email

## Facts

- Tool: `verify_email`
- Server: X402 Middleware (`@gadgethumans/x402`) — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware.md
- Install: `npx -y @gadgethumans/x402`
- Homepage: https://github.com/scotia1973-bot/gadgethumans-x402
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `email` | string | yes |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "verify_email",
    "arguments": {
      "email": "<email>"
    }
  }
}
```

## Why verify_email is rated Low

This tool retrieves validation information about an email address without creating, modifying, deleting, or executing operations. It is a read-only check that returns validation status. No data is altered, no code is executed, and no financial transactions occur. The low severity reflects minimal blast radius—incorrect email validation results may cause inconvenience but cannot directly compromise systems or data.

From the tool's own definition: "Tool description states it 'Verify[s] whether an email address is valid and deliverable' by checking 'syntax, domain validity, and whether the address is from a disposable email provider.' These are query/validation operations with no side effects."

## Use case

AI agents call verify_email to retrieve information from X402 Middleware without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches X402 Middleware:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "verify_email": {}
  }
}
```

## Other tools on X402 Middleware (57)

- `agent_memory` — Destructive — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/agent-memory.md
- `wallet_buy` — Financial — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/wallet-buy.md
- `x402_payment_request` — Financial — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/x402-payment-request.md
- `x402_pricing` — Financial — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/x402-pricing.md
- `x402_verify_payment` — Financial — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/x402-verify-payment.md
- `analyze_readability` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/analyze-readability.md
- `analyze_url` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/analyze-url.md
- `bmr_calc` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/bmr-calc.md
- `calculate_bmi` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/calculate-bmi.md
- `calculate_date` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/calculate-date.md
- `check_ssl_certificate` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/check-ssl-certificate.md
- `classify` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/classify.md
- `compare_items` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/compare-items.md
- `convert_currency` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/convert-currency.md
- `convert_timestamp` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/convert-timestamp.md
- `convert_timezone` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/convert-timezone.md
- `decode_jwt` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/decode-jwt.md
- `detect_language` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/detect-language.md
- `dns_lookup` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/dns-lookup.md
- `extract_contacts` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/extract-contacts.md
- `generate_seo_metadata` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/generate-seo-metadata.md
- `generate_uuid` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/generate-uuid.md
- `geocode` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/geocode.md
- `geolocate_ip` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/geolocate-ip.md
- `get_air_quality` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/get-air-quality.md
- `get_crypto_prices` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/get-crypto-prices.md
- `get_forecast` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/get-forecast.md
- `get_og_metadata` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/get-og-metadata.md
- `get_weather` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/get-weather.md
- `grammar` — Read — https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware/grammar.md
- …and 27 more: https://policylayer.com/tools/com-gadgethumans-swarm-x402-middleware.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-gadgethumans-swarm-x402-middleware · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-gadgethumans-swarm-x402-middleware