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Listclean for AI agents

Listclean is an email verification service that validates and cleans mailing lists to improve deliverability and protect sender reputation before a send. 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 ListcleanSee the 16 actions ↓
EmailAPI keyMCP + RESTlistclean.xyz
AUDIT LOG · LISTCLEANPOLICY: acme-support
09:41:07 · claude · u_8f2read
listclean.list_all
List All Verification Lists✓ allowed · 212ms
09:41:08 · claude · u_8f2read
listclean.get_list
Get List Information✓ allowed · 164ms
09:41:09 · claude · u_8f2write
listclean.create_bulk_verification_list
Create Bulk Verification List✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
listclean.delete_list
Delete List✕ blocked · policy: deny
EVERY LISTCLEAN CALL, ON THE RECORD
01 · USE CASES

What agents do in Listclean.

01

Verify a single email address

Check one email address for deliverability before adding it to an outreach sequence.

02

Check a bulk verification job

Look up the status and results of a bulk list verification, read-only.

03

Approve before deleting a list

Require approval before deleting a verification list, since it removes its stored results.

02 · ACTIONS

16 Listclean actions, graded by risk.

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

read

11

Look things up. Allowed by default.

  • listclean.get_list
    Get List Information
  • listclean.list_all
    List All Verification Lists
  • listclean.get_credits
    Get Remaining Credits
  • listclean.list_uploads
    List CSV Uploads
  • listclean.get_upload_status
    Get Upload Status
  • listclean.get_account_profile
    Get Account Profile
  • listclean.get_verification_logs
    Get Verification Logs
  • listclean.download_csv
    Download List Results as CSV
  • listclean.verify_batch
    Verify Batch of Emails
  • listclean.verify_email
    Verify Email Address
  • listclean.download_json
    Download List Results as JSON

write

4

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

  • listclean.update_profile
    Update Account Profile
  • listclean.create_bulk_verification_list
    Create Bulk Verification List
  • listclean.start_upload
    Start Upload
  • listclean.upload_chunk
    Upload Chunk

destructive

1

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

  • listclean.delete_list
    Delete List
03 · HOW IT WORKS

Listclean in three steps.

  1. 01Your users connect ListcleanThey add their Listclean api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Bulk Verification List” can wait for the user, and “delete List” can be denied outright.
  3. 03Any agent can actYour agent calls Listclean 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('listclean', {
  read: 'allow',
  write: 'ask',        // create_bulk_verification_list
  destructive: 'deny',  // delete_list
})

# 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 Listclean connects.

Users add their Listclean 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 Listclean 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 Listclean 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

Listclean and Arc0, answered.

Q01

Can I use Listclean with Claude, ChatGPT or Cursor?

Yes. Connect Listclean 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 Listclean actions you allow.

Q02

How do users connect Listclean?

Users add their Listclean 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 Listclean actions can my agent take?

16 in total: 11 read, 4 write and 1 destructive, such as “create Bulk Verification List”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Listclean?

Yes. Actions like “delete List” 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 Listclean too?

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

Get started

Plug Listclean into your agent.

Your users connect Listclean once, under your brand. Your agent gets 16 actions behind your policies, with every call on the record.

Connect ListcleanBrowse all apps →

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