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Emaillistverify for AI agents

EmailListVerify checks and cleans email lists, flagging invalid, disposable, or blacklisted addresses before a campaign sends, used by marketers who need to protect deliverability at scale. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect EmaillistverifySee the 12 actions ↓
EmailAPI keyMCP + RESTemaillistverify.com
AUDIT LOG · EMAILLISTVERIFYPOLICY: acme-support
09:41:07 · claude · u_8f2read
emaillistverify.get_credits
Get Credits✓ allowed · 212ms
09:41:08 · claude · u_8f2read
emaillistverify.find_contact
Find Contact Email✓ allowed · 164ms
09:41:09 · claude · u_8f2write
emaillistverify.upload_email_list
Upload Email List✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
emaillistverify.delete_maillist
Delete Maillist✕ blocked · policy: deny
EVERY EMAILLISTVERIFY CALL, ON THE RECORD
01 · USE CASES

What agents do in Emaillistverify.

01

Verify a single email in detail

Run a detailed verification on one address to see why it might be bouncing.

02

Check a maillist's progress

Poll a maillist's verification progress to see when the cleaned list will be ready.

03

Confirm before deleting a maillist

Require approval before deleting a maillist, since it discards the verification results tied to it.

02 · ACTIONS

12 Emaillistverify actions, graded by risk.

Every Emaillistverify action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

10

Look things up. Allowed by default.

  • emaillistverify.get_credits
    Get Credits
  • emaillistverify.find_contact
    Find Contact Email
  • emaillistverify.get_email_job
    Get Email Job Status
  • emaillistverify.get_api_file_info
    Get API File Info
  • emaillistverify.get_maillist_progress
    Get Maillist Progress
  • emaillistverify.check_blacklists
    Check Blacklists
  • emaillistverify.check_disposable
    Check Disposable Domain
  • emaillistverify.download_maillist
    Download Email List
  • emaillistverify.verify_single_email
    Verify Single Email
  • emaillistverify.verify_single_email_detailed
    Verify Single Email Detailed

write

1

Create and change things. Allow, or ask the user first.

  • emaillistverify.upload_email_list
    Upload Email List

destructive

1

Delete, cancel or archive. Ask first, or deny outright.

  • emaillistverify.delete_maillist
    Delete Maillist
03 · HOW IT WORKS

Emaillistverify in three steps.

  1. 01Your users connect EmaillistverifyThey add their Emaillistverify api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “upload Email List” can wait for the user, and “delete Maillist” can be denied outright.
  3. 03Any agent can actYour agent calls Emaillistverify through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('emaillistverify', {
  read: 'allow',
  write: 'ask',        // upload_email_list
  destructive: 'deny',  // delete_maillist
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Emaillistverify connects.

Users add their Emaillistverify api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Emaillistverify connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Emaillistverify from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More email apps.

Gmail62 actionsOutlook306 actionsSendGrid364 actionsMixmax94 actionsElastic Email91 actionsResend66 actionsLettr60 actionsPostmark46 actions
ALL EMAIL APPS →
07 · FAQ

Emaillistverify and Arc0, answered.

Q01

Can I use Emaillistverify with Claude, ChatGPT or Cursor?

Yes. Connect Emaillistverify to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Emaillistverify actions you allow.

Q02

How do users connect Emaillistverify?

Users add their Emaillistverify api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Emaillistverify actions can my agent take?

12 in total: 10 read, 1 write and 1 destructive, such as “upload Email List”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Emaillistverify?

Yes. Actions like “delete Maillist” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Emaillistverify too?

Yes. The same Emaillistverify connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Emaillistverify into your agent.

Your users connect Emaillistverify once, under your brand. Your agent gets 12 actions behind your policies, with every call on the record.

Connect EmaillistverifyBrowse all apps →

Free to build · MCP + REST · Audit log on every plan