Operated by Sourcelane✓ verified
Validate email addresses in bulk by checking syntax, MX records, disposable domains, role accounts, and free providers.
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, 3:55 AM
$0.0012
per result
Up to 100 per call. Only pay for results returned; failed calls are refunded.
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
One or more email addresses to validate.
Optional settings
| Window | Uptime | Success rate | p50 | p95 | Calls |
|---|---|---|---|---|---|
| 24h | — | — | — | — | 0 |
| 7d | — | — | — | — | 0 |
| 30d | — | — | — | — | 0 |
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://api.usesourcelane.com/v1/call \
-H "Authorization: Bearer sl_live_your_agent_key" \
-H "Content-Type: application/json" \
-d '{"listing":"email-validator","params":{"emails":["hello@stripe.com","support@gmail.com","fake@thisdomaindoesnotexist123.com"]},"maxResults":10}'Request params
| Field | Type | Required | Description |
|---|---|---|---|
emails | array | required | One or more email addresses to validate. Each address produces one output record. |
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 | |
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 |
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. One click, then confirm.
Adds the Sourcelane MCP server with your key as a header.
claude mcp add --transport http sourcelane https://api.usesourcelane.com/mcp \
--header "Authorization: Bearer sl_live_your_agent_key"Alternative to the connector URL: add to claude_desktop_config.json, then restart Claude.
{
"mcpServers": {
"sourcelane": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://api.usesourcelane.com/mcp",
"--header",
"Authorization:${AUTH_HEADER}"
],
"env": {
"AUTH_HEADER": "Bearer sl_live_your_agent_key"
}
}
}
}Add to ~/.cursor/mcp.json (or Windsurf's mcp_config.json).
{
"mcpServers": {
"sourcelane": {
"url": "https://api.usesourcelane.com/mcp",
"headers": {
"Authorization": "Bearer sl_live_your_agent_key"
}
}
}
}Save as .vscode/mcp.json. VS Code prompts for your key once.
{
"servers": {
"sourcelane": {
"type": "http",
"url": "https://api.usesourcelane.com/mcp",
"headers": {
"Authorization": "Bearer ${input:sourcelane-key}"
}
}
},
"inputs": [
{
"type": "promptString",
"id": "sourcelane-key",
"description": "Sourcelane agent key",
"password": true
}
]
}Create a GPT → Actions → Import from URL, then Authentication: API Key, Bearer.
https://usesourcelane.com/openapi.jsonOne POST. Pass maxResults to cap cost.
curl -X POST https://api.usesourcelane.com/v1/call \
-H "Authorization: Bearer sl_live_your_agent_key" \
-H "Content-Type: application/json" \
-d '{"listing":"email-validator","params":{"emails":["hello@stripe.com","support@gmail.com","fake@thisdomaindoesnotexist123.com"]},"maxResults":10}'Wrap the REST call as a tool, or point an MCP client at the endpoint.
import requests
res = requests.post(
"https://api.usesourcelane.com/v1/call",
headers={"Authorization": "Bearer sl_live_your_agent_key"},
json={
"listing": "email-validator",
"params": {"emails":["hello@stripe.com","support@gmail.com","fake@thisdomaindoesnotexist123.com"]},
"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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