Notes on verification, lists, and agents.
Practical writing on email verification, list definition, and the real economics of buying B2B contact data.
How to build a targeted B2B list by industry and seniority
A field guide to list definition: why industry filters lie, why seniority is a pattern set rather than a dropdown, how to size a list backward from sending capacity, and the preview-first workflow that catches bad filters before you pay for them.
Read the post →Why verified-at-export beats verified-at-collection
B2B contact data decays the moment it's collected. Here's why the timing of verification matters more than the method, what an SMTP probe actually proves, and how pay-per-valid pricing changes the buyer's math.
Connecting Claude to a B2B contact database
A practical walkthrough of agent-driven list building: connect Claude to Argorant over MCP, scope a list with free counts and previews, then reveal and export only what survives scrutiny.
The real cost of a B2B contact
Sticker price per credit tells you almost nothing. Here's the full cost-per-usable-contact equation — seats, bounce rates, cleanup tools, deliverability damage — and a method for comparing vendors on identical samples.