4da MCP Server vs BillionVerify
A side-by-side look at the 4da MCP Server and BillionVerify MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
B
BillionVerifyCommunication · Local subprocess (stdio)Email verification for AI agents: verify single or bulk emails, check credits and history.52GoodAuth: not declaredVerdict: choose 4da MCP Server for security work as a local process; choose BillionVerify for communication as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose 4da MCP Server when
- You need dedicated capabilities in the Security domain.
- You prefer a local stdio subprocess transport.
BChoose BillionVerify when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
BILLIONVERIFY_API_KEY. - You want tools like
verify_single_email, verify_batch_emails, get_account_balance.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | B BillionVerify | |
|---|---|---|
| Category | Security | Communication |
| Quality signal | 45/100 · Fair | 52/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | BYOK (pay the provider) |
| Required env vars | None listed | BILLIONVERIFY_API_KEY |
Tools & capabilities
4da MCP Server tools
No tool names declared yet. Check the project README from the listing page.
BillionVerify tools 11
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 health
Ready-to-paste client configs
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.
4da MCP Server
{
"mcpServers": {
"4da-mcp-server": {
"command": "npx",
"args": [
"-y",
"@4da/mcp-server"
]
}
}
}
BillionVerify
{
"mcpServers": {
"billionverify": {
"command": "npx",
"args": [
"-y",
"billionverify-mcp"
],
"env": {
"BILLIONVERIFY_API_KEY": "YOUR_BILLIONVERIFY_API_KEY_HERE"
}
}
}
}
Frequently asked questions
4da MCP Server is categorized under Security and uses a local stdio subprocess. BillionVerify belongs to Communication and uses a local stdio subprocess. Pick 4da MCP Server for security work and BillionVerify for communication.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
4da MCP Server has no declared pricing — check the project's own site. BillionVerify is bring-your-own-key: usage is billed by the API provider you supply a key for. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add 4da-mcp-server and billionverify as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, 4da MCP Server has a quality signal of 45/100 (Fair) with 2 views, 0 installs and 2 GitHub stars. BillionVerify has 52/100 (Good) with 0 views, 0 installs and 0 GitHub stars.