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Email Validation

Email address validation — format checking, MX record verification, disposable and role address detection.

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status: healthy status status healthy healthy tools: 3 tools tools 3 3 type: validation enrichment type type validation enrichment validation enrichment lifecycle: maintained lifecycle lifecycle maintained maintained Utilities

Data source: Cloudflare DNS, curated lists

MCP Endpoint (Streamable HTTP) https://context.gnist.ai/mcp/email-validation/
Authentication

All requests require a Gnist-API-Key header (or api_key query parameter).

Free tier: 100 calls/day. Get your API key.

Tools (3)

validate_email

Validate an email address — checks format, MX records, disposable/role detection.

Returns whether the format is valid, if the domain has MX records (can receive mail),
whether it's a known disposable email provider, and whether it's a role address
(e.g. admin@, support@).

Args:
email: Email address to validate (e.g. "[email protected]").

ParameterTypeRequiredDescription
emailstringrequired
JSON-RPC Request
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "validate_email",
    "arguments": {
      "email": "example"
    }
  }
}
validate_email_batch

Validate multiple email addresses at once (max 50).

Args:
emails: Comma-separated email addresses (e.g. "[email protected],[email protected]").

ParameterTypeRequiredDescription
emailsstringrequired
JSON-RPC Request
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "validate_email_batch",
    "arguments": {
      "emails": "example"
    }
  }
}
report_feedback

Report a bug, feature request, or general feedback for this data source.

Use this when something doesn't work as expected, when you'd like
a new feature, or when you have suggestions for improvement.

Args:
feedback: Describe the issue or suggestion.
feedback_type: One of 'bug', 'feature_request', or 'general'.

ParameterTypeRequiredDescription
feedbackstringrequired
feedback_typestringoptional (default: "general")
JSON-RPC Request
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "report_feedback",
    "arguments": {
      "feedback": "example"
    }
  }
}

Quick Start

Shell
curl -X POST "https://context.gnist.ai/mcp/email-validation/" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Gnist-API-Key: YOUR_API_KEY" \
  -d '{"jsonrpc": "2.0", "method": "tools/call", "id": 1, "params": {"name": "validate_email", "arguments": {"email": "example"}}}'
Python
import httpx

resp = httpx.post(
    "https://context.gnist.ai/mcp/email-validation/",
    headers={"Gnist-API-Key": "YOUR_API_KEY", "Content-Type": "application/json"},
    json={
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "validate_email",
    "arguments": {
      "email": "example"
    }
  }
},
)
print(resp.json())

Related Toolkits (Utilities)

Resources