A side-by-side look at the BillionVerify and MCP Server MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose BillionVerify for communication work as a local process; choose MCP Server for communication as a local process. You can also run both side by side in one mcpServers block.
BILLIONVERIFY_API_KEY.verify_single_email, verify_batch_emails, get_account_balance.POSTCARDBOT_API_KEY, POSTCARDBOT_API_URL.send_postcard, bulk_send, check_balance.Rows where the two servers differ are marked.
| Spec | B BillionVerify | |
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 52/100 · Good | 53/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | API key required |
| Pricing | BYOK (pay the provider) | BYOK (pay the provider) |
| Required env vars | BILLIONVERIFY_API_KEY | POSTCARDBOT_API_KEYPOSTCARDBOT_API_URL |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 5 |
| Directory activity | 0 views 0 installs 0 upvotes | 1 views 0 installs 0 upvotes |
| Tools | 11 | 8 |
| Full listing | View BillionVerify | View MCP Server |
verify_single_emailVerify a single email address in real-timeverify_batch_emailsVerify up to 50 emails in one requestget_account_balanceCheck your credit balanceget_verification_historyList verification history (paginated)get_verification_statsAggregated statistics for 7d / 30d / 90d / 1yget_task_statusPoll the status of an async file verification jobget_download_urlGet download URL for results with status filterscreate_webhookSubscribe to file completion eventslist_webhooksList all configured webhooksdelete_webhookRemove a webhookhealth_checkCheck server healthsend_postcardSend a physical postcard. Cards are printed and shipped within 24 hours. Delivery takes 5-10 business days.bulk_sendSend the same postcard to multiple recipients (async). Up to 5,000 recipients per request. Cards are processed in background batches.check_balanceCheck account balance, lifetime top-up amount, and current volume pricing tier.get_pricingGet all volume pricing tiers.check_statusCheck delivery status of a previously sent postcard.list_webhooksList all registered webhooks for your account.create_webhookRegister a URL to receive postcard event notifications (sent, delivered, failed, returned). URL must use HTTPS. Max 10 webhooks per account.delete_webhookDelete a registered webhook by its ID.Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
{
"mcpServers": {
"billionverify": {
"command": "npx",
"args": [
"-y",
"billionverify-mcp"
],
"env": {
"BILLIONVERIFY_API_KEY": "YOUR_BILLIONVERIFY_API_KEY_HERE"
}
}
}
}
{
"mcpServers": {
"postcardbot-mcp-server": {
"command": "npx",
"args": [
"-y",
"@postcardbot/mcp-server"
],
"env": {
"POSTCARDBOT_API_KEY": "YOUR_POSTCARDBOT_API_KEY_HERE",
"POSTCARDBOT_API_URL": "YOUR_POSTCARDBOT_API_URL_HERE"
}
}
}
}