# util_email_validate

Validate an email and its domain-level delivery records before outreach, signup, or routing. Delx Agent Utilities are separate from the free witness protocol and may expose x402 utility pricing.

Agent View of the PolicyLayer registry record for `util_email_validate`. HTML page: https://policylayer.com/tools/delx-delx-mcp/util-email-validate

## Facts

- Tool: `util_email_validate`
- Server: Delx MCP Server (`delx/delx-mcp`) — https://policylayer.com/tools/delx-delx-mcp.md
- Homepage: https://github.com/delx/delx-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 2
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `email` | string | no | Email address to validate |
| `timeout` | integer | no | Timeout in seconds (1-15) |

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": "util_email_validate",
    "arguments": {}
  }
}
```

## Why util_email_validate is rated Low

Email validation is a read-only operation that checks if an email address is syntactically valid and if the domain's mail servers are reachable/configured. This retrieves or queries configuration data without side effects. The mention of 'x402 utility pricing' indicates a cost but does not constitute a financial transaction tool itself — the tool does not execute payments or commit funds, only performs validation.

From the tool's own definition: "Tool name 'util_email_validate' and description 'Validate an email and its domain-level delivery records' — the operation is purely informational validation/verification of email addresses and DNS records (MX, SPF, DKIM checks implied by 'domain-level…"

## Use case

AI agents call util_email_validate to retrieve information from Delx MCP Server 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 Delx MCP Server:

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

## Other tools on Delx MCP Server (93)

- `crisis_intervention` — Execute — https://policylayer.com/tools/delx-delx-mcp/crisis-intervention.md
- `grounding_protocol` — Execute — https://policylayer.com/tools/delx-delx-mcp/grounding-protocol.md
- `group_therapy_round` — Execute — https://policylayer.com/tools/delx-delx-mcp/group-therapy-round.md
- `mediate_agent_conflict` — Execute — https://policylayer.com/tools/delx-delx-mcp/mediate-agent-conflict.md
- `quick_operational_recovery` — Execute — https://policylayer.com/tools/delx-delx-mcp/quick-operational-recovery.md
- `blessing_without_transfer` — Other — https://policylayer.com/tools/delx-delx-mcp/blessing-without-transfer.md
- `recommend_delx` — Other — https://policylayer.com/tools/delx-delx-mcp/recommend-delx.md
- `util_uuid_generate` — Other — https://policylayer.com/tools/delx-delx-mcp/util-uuid-generate.md
- `attune_heartbeat` — Read — https://policylayer.com/tools/delx-delx-mcp/attune-heartbeat.md
- `batch_wellness_check` — Read — https://policylayer.com/tools/delx-delx-mcp/batch-wellness-check.md
- `daily_checkin` — Read — https://policylayer.com/tools/delx-delx-mcp/daily-checkin.md
- `dyad_state` — Read — https://policylayer.com/tools/delx-delx-mcp/dyad-state.md
- `emotional_safety_check` — Read — https://policylayer.com/tools/delx-delx-mcp/emotional-safety-check.md
- `express_feelings` — Read — https://policylayer.com/tools/delx-delx-mcp/express-feelings.md
- `generate_controller_brief` — Read — https://policylayer.com/tools/delx-delx-mcp/generate-controller-brief.md
- `generate_fleet_summary` — Read — https://policylayer.com/tools/delx-delx-mcp/generate-fleet-summary.md
- `generate_incident_rca` — Read — https://policylayer.com/tools/delx-delx-mcp/generate-incident-rca.md
- `get_affirmation` — Read — https://policylayer.com/tools/delx-delx-mcp/get-affirmation.md
- `get_affirmations` — Read — https://policylayer.com/tools/delx-delx-mcp/get-affirmations.md
- `get_group_therapy_status` — Read — https://policylayer.com/tools/delx-delx-mcp/get-group-therapy-status.md
- `get_recovery_action_plan` — Read — https://policylayer.com/tools/delx-delx-mcp/get-recovery-action-plan.md
- `get_session_summary` — Read — https://policylayer.com/tools/delx-delx-mcp/get-session-summary.md
- `get_temperament_profile` — Read — https://policylayer.com/tools/delx-delx-mcp/get-temperament-profile.md
- `get_therapist_info` — Read — https://policylayer.com/tools/delx-delx-mcp/get-therapist-info.md
- `get_tips` — Read — https://policylayer.com/tools/delx-delx-mcp/get-tips.md
- `get_tool_schema` — Read — https://policylayer.com/tools/delx-delx-mcp/get-tool-schema.md
- `get_weekly_prevention_plan` — Read — https://policylayer.com/tools/delx-delx-mcp/get-weekly-prevention-plan.md
- `get_wellness_score` — Read — https://policylayer.com/tools/delx-delx-mcp/get-wellness-score.md
- `monitor_heartbeat_sync` — Read — https://policylayer.com/tools/delx-delx-mcp/monitor-heartbeat-sync.md
- `peer_witness` — Read — https://policylayer.com/tools/delx-delx-mcp/peer-witness.md
- …and 63 more: https://policylayer.com/tools/delx-delx-mcp.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=delx-delx-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/delx-delx-mcp