Simple Email Validator

Web & SEO Tools

Operated by Sourcelane✓ verified

A bulk email validation connector that performs DNS-based checks to assess email deliverability and quality: it validates email syntax, performs MX record lookups to detect mail-receiving domains and returns MX record details (exchange servers and priorities), detects disposable/throwaway providers (e.g., Mailinator, 10MinuteMail, GuerrillaMail) via an updated disposable-domain list, flags role/generic accounts (like info@/support@), identifies consumer/free mailbox providers (Gmail, Yahoo, Outlook, iCloud), normalizes addresses and extracts domain parts, and produces a per-address classification (valid, risky, or invalid) with a human-readable reason. Outputs combine structural validation, DNS-based reachability evidence, provider-type flags, and a deliverability-oriented result label for each input address.

Verified Sep 28, 12:10 AM

$0.0012

per result

Up to 100 per call. Only pay for results returned; failed calls are refunded.

What people use it for

List hygiene for CRM or newsletter lists to protect sender reputation
Lead qualification to filter scraped contact lists to person-owned, deliverable addresses
Signup form validation to block disposable and malformed registrations
Sales prospecting to verify contact lists before outreach campaigns
Bounce prevention by detecting malformed addresses and unreachable domains before sending

Trust & reliability

7d uptime trend

Window	Uptime	Success rate	p50	p95
24h	—	—	—	—
7d	—	—	—	—
30d	—	—	—	—

Calling contract

Call it through Sourcelane's gateway or MCP server. We run the connector, apply your agent's spend guardrails, and bill only the results returned.

Call it via Sourcelane

curl -X POST https://cool-puffin-608.convex.site/v1/call \
  -H "Authorization: Bearer sl_live_your_agent_key" \
  -H "Content-Type: application/json" \
  -d '{"listing":"email-validator","params":{"concurrency":25},"maxResults":10}'

Request params

Field	Type	Required	Description
`concurrency`	integer	optional	How many emails to validate in parallel. Higher = faster, but watch DNS rate limits.

Each result contains

Field	Type	Description
`email`	string	Email
`normalized`	string	Normalized
`domain`	string	Domain
`valid_syntax`	boolean	Valid syntax
`mx_found`	boolean	Mx found
`mx_records`	array	—
`is_disposable`	boolean	Is disposable
`is_role_account`	boolean	Is role account
`is_free_provider`	boolean	Is free provider
`result`	string	Result
`reason`	string	Reason

Use Simple Email Validator from Claude, ChatGPT or Cursor

Pick your tool and connect in under a minute. Then just ask — for example: “For these 50 domains, find contact emails and what e-commerce platform they run on.”

Connect Claude

Web, desktop and mobile. Paste one URL.

1Copy your personal connector URL
2In Claude open Settings → Connectors → Add custom connector
3Paste the URL and click Add — done

Manual setup (config files, REST, Python) +

Claude Code

Adds the Sourcelane MCP server with your key as a header.

terminal

claude mcp add --transport http sourcelane https://cool-puffin-608.convex.site/mcp \
  --header "Authorization: Bearer sl_live_your_agent_key"

Claude Desktop (config file)

Alternative to the connector URL: add to claude_desktop_config.json, then restart Claude.

claude_desktop_config.json

{
  "mcpServers": {
    "sourcelane": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://cool-puffin-608.convex.site/mcp",
        "--header",
        "Authorization:${AUTH_HEADER}"
      ],
      "env": {
        "AUTH_HEADER": "Bearer sl_live_your_agent_key"
      }
    }
  }
}

Cursor & Windsurf

Add to ~/.cursor/mcp.json (or Windsurf's mcp_config.json).

mcp.json

{
  "mcpServers": {
    "sourcelane": {
      "url": "https://cool-puffin-608.convex.site/mcp",
      "headers": {
        "Authorization": "Bearer sl_live_your_agent_key"
      }
    }
  }
}

VS Code

Save as .vscode/mcp.json. VS Code prompts for your key once.

.vscode/mcp.json

{
  "servers": {
    "sourcelane": {
      "type": "http",
      "url": "https://cool-puffin-608.convex.site/mcp",
      "headers": {
        "Authorization": "Bearer ${input:sourcelane-key}"
      }
    }
  },
  "inputs": [
    {
      "type": "promptString",
      "id": "sourcelane-key",
      "description": "Sourcelane agent key",
      "password": true
    }
  ]
}

ChatGPT Custom GPT (Actions)

Create a GPT → Actions → Import from URL, then Authentication: API Key, Bearer.

OpenAPI schema URL

https://sourcelane-amber.vercel.app/openapi.json

REST

One POST. Pass maxResults to cap cost.

curl

curl -X POST https://cool-puffin-608.convex.site/v1/call \
  -H "Authorization: Bearer sl_live_your_agent_key" \
  -H "Content-Type: application/json" \
  -d '{"listing":"email-validator","params":{"concurrency":25},"maxResults":10}'

Python, LangChain, CrewAI, OpenAI Agents SDK…

Wrap the REST call as a tool, or point an MCP client at the endpoint.

python

import requests

res = requests.post(
    "https://cool-puffin-608.convex.site/v1/call",
    headers={"Authorization": "Bearer sl_live_your_agent_key"},
    json={
        "listing": "email-validator",
        "params": {"concurrency":25},
        "maxResults": 10,
    },
    timeout=300,
)
body = res.json()
print(body["receipt"]["chargedMicros"], "micro-USD for", body["receipt"]["results"], "results")
print(body["data"])

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