New: 500 free verifications when you sign up
Drop a CSV. Get a clean, safe list back in minutes. Bounce risk drops from ~14% to under 1%. Pay per verification, not per month.
Upload up to 50,000 emails per task. Processed in parallel across multiple SMTP servers.
Safe, role, catch-all, disposable, inbox-full, spam-trap, disabled, invalid — every email tagged so you know exactly what to send.
Download safe only, risky only, or the full categorised CSV. Drop it straight into your sending tool.
Built for modern stacks
A clean REST API, an MCP server, and a Slack bot. Anything that can make an HTTP call can verify with FrostyVerify, your code, your AI agents, your no-code flows, or just a CSV dropped into a DM.
REST API
Verify from your own code. Single or bulk.
MCP Server
For Claude, Cursor & AI agents.
Claude Code
Verify straight from the CLI / IDE.
Slack
Drop a CSV in a DM, get the clean list back.
Works with your stack
Verify your lists before importing to any sending platform, or wire it in through the API.
Buy more, pay less per verification
Volume discount up to 37%. One credit verifies one email. Pay once.
Growth pack
Save 28%€30.00one-time
50,000
verifications
Most popular. Save 28% vs Trial.
Get Growth — €30.00Most verifiers dump catch-all (accept-all) domains as “risky” and you lose those contacts. Our catch-all scoring grades each one safe, risky, or invalid, so you can safely send to the deliverable ones. Billed from a separate balance.
€38.00
10,000 checks
€3.80/1k
€160.00
50,000 checks
€3.20/1k
€290.00
100,000 checks
€2.90/1k
€650.00
250,000 checks
€2.60/1k
€2,200.00
1,000,000 checks
€2.20/1k
One command connects FrostyVerify to Claude Code, Cursor, or Claude Desktop. Then just say “verify leads.csv and give me the safe ones, then score the catch-alls.”
claude mcp add --env FROSTYVERIFY_API_KEY=fv_live_your_key --transport stdio frostyverify -- npx -y frostyverify-mcp
Tools: verify_email, verify_bulk, verify_catchall, get_job. Full REST API + MCP docs inside.
Drop a list into a DM and get the clean file back in the same place. No dashboard, no tab hunting, no waiting on a page to refresh.
Add to Slack
One click from your dashboard, then paste your API key into the DM once. That is the whole setup.
Drop a CSV in the DM
The bot reads it and tells you how many emails it found and what it will cost, before anything is charged.
Pick what you want back
Safe to send, safe without role accounts, catch-all, invalid, or everything categorised. Tick more than one and you get a CSV for each.
Files land in the same DM
Your original columns come back untouched with the verification columns added, so the list is ready to load straight into your sender.
The bot only ever reads its own direct messages, never your channels. It warns you when credits run low and sends a short summary once a week, nothing more.
Need email sending accounts to go with your clean list?
Microsoft, Google, and SMTP mailboxes with domains and DNS set up for you.
Check out frostmailer.com →