Holded for AI agents
Holded is business management software for invoices, contacts, and sales documents used by small and medium businesses. Sales and account teams use it to keep customer records and activity in one shared place. 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 Holded.
Look up a customer's invoices
Search invoices tied to a contact to check whether an outstanding balance exists.
Create a new invoice
Create an invoice for a contact with line items pulled from an approved quote.
Delete an invoice with confirmation
Delete a draft invoice only after finance confirms it was created in error.
10 Holded actions, graded by risk.
Every Holded action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.
read
4Look things up. Allowed by default.
- holded.get_contactGet Contact
- holded.get_invoiceGet Invoice
- holded.find_contactsFind Contacts
- holded.find_invoicesFind Invoices
write
4Create and change things. Allow, or ask the user first.
- holded.create_contactCreate Contact
- holded.create_invoiceCreate Invoice
- holded.update_contactUpdate Contact
- holded.update_invoiceUpdate Invoice
destructive
2Delete, cancel or archive. Ask first, or deny outright.
- holded.delete_contactDelete Contact
- holded.delete_invoiceDelete Invoice
Holded in three steps.
- 01Your users connect HoldedThey add their Holded api key on Arc0 Connect, under your brand. It goes straight into the vault.
- 02You set the rulesReads run, writes like “create Contact” can wait for the user, and “delete Contact” can be denied outright.
- 03Any agent can actYour agent calls Holded through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
await arc0.policies.set('holded', { read: 'allow', write: 'ask', // create_contact destructive: 'deny', // delete_contact }) # Claude Code: the same connection, one URL $ claude mcp add --transport http arc0 \ https://mcp.arc0.ai/u/u_8f2
How Holded connects.
Users add their Holded 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 Holded 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 Holded from any agent.
ClaudeChatGPTCursor
Codex
VS CodeOpenAI Agents SDKClaude Agent SDK
Vercel AI SDK
Mastra
LangGraph
Holded and Arc0, answered.
Can I use Holded with Claude, ChatGPT or Cursor?
Yes. Connect Holded 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 Holded actions you allow.
How do users connect Holded?
Users add their Holded 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 Holded actions can my agent take?
10 in total: 4 read, 4 write and 2 destructive, such as “create Contact”. Your policies decide which of them each agent may call.
Can I stop my agent from deleting things in Holded?
Yes. Actions like “delete Contact” 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 Holded too?
Yes. The same Holded connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.
Plug Holded into your agent.
Your users connect Holded 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