Sequenzy for AI agents
Sequenzy is an email marketing and automation platform for managing subscribers, campaigns, and sequences alongside transactional email. Marketing teams use it to run lifecycle email programs. 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.
What agents do in Sequenzy.
Check email performance metrics
Pull email metrics for a campaign to see delivery and engagement before adjusting the sequence.
List subscribers on a sequence
Retrieve the subscribers and lists tied to an active sequence before adding new contacts.
Confirm before removing a tag
Review a tag's usage and get confirmation before deleting it, since it may still be applied to subscribers.
10 Sequenzy actions, graded by risk.
Every Sequenzy action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.
read
8Look things up. Allowed by default.
- sequenzy.list_tagsList Tags
- sequenzy.get_subscriberGet Subscriber
- sequenzy.list_campaignsList Campaigns
- sequenzy.list_sequencesList Sequences
- sequenzy.list_templatesList Templates
- sequenzy.list_subscribersList Subscribers
- sequenzy.get_email_metricsGet Email Metrics
- sequenzy.list_subscriber_listsList Subscriber Lists
write
1Create and change things. Allow, or ask the user first.
- sequenzy.create_tagCreate Tag
destructive
1Delete, cancel or archive. Ask first, or deny outright.
- sequenzy.delete_tagDelete Tag
Sequenzy in three steps.
- 01Your users connect SequenzyThey add their Sequenzy api key on Arc0 Connect, under your brand. It goes straight into the vault.
- 02You set the rulesReads run, writes like “create Tag” can wait for the user, and “delete Tag” can be denied outright.
- 03Any agent can actYour agent calls Sequenzy through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
await arc0.policies.set('sequenzy', { read: 'allow', write: 'ask', // create_tag destructive: 'deny', // delete_tag }) # Claude Code: the same connection, one URL $ claude mcp add --transport http arc0 \ https://mcp.arc0.ai/u/u_8f2
How Sequenzy connects.
Users add their Sequenzy 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 Sequenzy 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
Use Sequenzy from any agent.
ClaudeChatGPTCursor
Codex
VS CodeOpenAI Agents SDKClaude Agent SDK
Vercel AI SDK
Mastra
LangGraph
Sequenzy and Arc0, answered.
Can I use Sequenzy with Claude, ChatGPT or Cursor?
Yes. Connect Sequenzy 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 Sequenzy actions you allow.
How do users connect Sequenzy?
Users add their Sequenzy 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.
Which Sequenzy actions can my agent take?
10 in total: 8 read, 1 write and 1 destructive, such as “create Tag”. Your policies decide which of them each agent may call.
Can I stop my agent from deleting things in Sequenzy?
Yes. Actions like “delete Tag” 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.
Can my own backend call Sequenzy too?
Yes. The same Sequenzy connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.
Plug Sequenzy into your agent.
Your users connect Sequenzy once, under your brand. Your agent gets 10 actions behind your policies, with every call on the record.
Free to build · MCP + REST · Audit log on every plan