> ## Documentation Index
> Fetch the complete documentation index at: https://deepline.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# MillionVerifier API Guide for GTM Workflows

> MillionVerifier provider guidance and usage best practices. Includes SDK V2 guidance, input constraints, response fields, and Deepline credit cost.

## Playbook

# MillionVerifier

Verify one email per call. Use Play rows for multiple emails; bulk operations are disabled pending file, tenant ownership, and billing contracts.

Keep `ok`, `invalid`, `disposable`, `catch_all`, and `unknown` distinct. `catch_all` and `unknown` do not prove deliverability. A provider error or inconsistent verdict is a failed verification. Repeat verification can consume provider credits again.

The free BYOK connection probe validates the connected customer's key internally and returns status only. Account balances do not establish per-call usage and are not included in the public response.


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