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ManyReach for AI agents

ManyReach is a cold email outreach platform for running campaigns, managing prospect lists, and tracking sender performance across multiple mailboxes. 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 ManyReachSee the 16 actions ↓
EmailAPI keyMCP + RESTmanyreach.com
AUDIT LOG · MANYREACHPOLICY: acme-support
09:41:07 · claude · u_8f2read
manyreach.list_tags
List Tags✓ allowed · 212ms
09:41:08 · claude · u_8f2read
manyreach.list_lists
List Mailing Lists✓ allowed · 164ms
09:41:09 · claude · u_8f2write
manyreach.create_tag
Create Tag✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
manyreach.delete_outreach_resource
Delete Outreach Resource✕ blocked · policy: deny
EVERY MANYREACH CALL, ON THE RECORD
01 · USE CASES

What agents do in ManyReach.

01

Add a prospect to a campaign

Create a new prospect and add them to an active outreach campaign.

02

Check a campaign's messages

List messages sent under a campaign to review reply activity and gauge how prospects are responding.

03

Approve before deleting a resource

Require approval before deleting a campaign or list, since it removes its outreach history.

02 · ACTIONS

16 ManyReach actions, graded by risk.

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

read

7

Look things up. Allowed by default.

  • manyreach.list_tags
    List Tags
  • manyreach.list_lists
    List Mailing Lists
  • manyreach.list_senders
    List Senders
  • manyreach.list_messages
    List Messages
  • manyreach.list_campaigns
    List Campaigns
  • manyreach.list_prospects
    List Prospects
  • manyreach.get_account_overview
    Get Account Overview

write

8

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

  • manyreach.create_tag
    Create Tag
  • manyreach.update_tag
    Update Tag
  • manyreach.create_list
    Create Mailing List
  • manyreach.update_list
    Update Mailing List
  • manyreach.create_campaign
    Create Campaign
  • manyreach.create_prospect
    Create Prospect
  • manyreach.update_campaign
    Update Campaign
  • manyreach.update_prospect
    Update Prospect

destructive

1

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

  • manyreach.delete_outreach_resource
    Delete Outreach Resource
03 · HOW IT WORKS

ManyReach in three steps.

  1. 01Your users connect ManyReachThey add their ManyReach api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Tag” can wait for the user, and “delete Outreach Resource” can be denied outright.
  3. 03Any agent can actYour agent calls ManyReach 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('manyreach', {
  read: 'allow',
  write: 'ask',        // create_tag
  destructive: 'deny',  // delete_outreach_resource
})

# 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 ManyReach connects.

Users add their ManyReach 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 ManyReach 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 ManyReach 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

ManyReach and Arc0, answered.

Q01

Can I use ManyReach with Claude, ChatGPT or Cursor?

Yes. Connect ManyReach 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 ManyReach actions you allow.

Q02

How do users connect ManyReach?

Users add their ManyReach 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 ManyReach actions can my agent take?

16 in total: 7 read, 8 write and 1 destructive, such as “create Tag”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in ManyReach?

Yes. Actions like “delete Outreach Resource” 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 ManyReach too?

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

Get started

Plug ManyReach into your agent.

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

Connect ManyReachBrowse all apps →

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