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Nusii proposals for AI agents

Nusii is proposal software that lets agencies and consultants build, send, and track client proposals without wrestling with Word or PDF layouts. Sales and client-services teams use it to close deals faster. 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 Nusii proposalsSee the 29 actions ↓
Finance and accountingAPI keyMCP + RESTnusii.com
AUDIT LOG · NUSII PROPOSALSPOLICY: acme-support
09:41:07 · claude · u_8f2read
nusii_proposals.list_users
List Users✓ allowed · 212ms
09:41:08 · claude · u_8f2read
nusii_proposals.get_client
Get Client✓ allowed · 164ms
09:41:09 · claude · u_8f2write
nusii_proposals.create_client
Create Client✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
nusii_proposals.delete_client
Delete a client✕ blocked · policy: deny
EVERY NUSII PROPOSALS CALL, ON THE RECORD
01 · USE CASES

What agents do in Nusii proposals.

01

Draft a new client proposal

Create a proposal with sections and line items pulled from a client brief, ready for review.

02

Check proposal activity read-only

List proposal activities to see whether a client has opened or viewed a sent proposal.

03

Delete a proposal with approval

Remove a draft proposal only after a sales lead signs off, since deletion is permanent.

02 · ACTIONS

29 Nusii proposals actions, graded by risk.

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

read

14

Look things up. Allowed by default.

  • nusii_proposals.get_client
    Get Client
  • nusii_proposals.list_users
    List Users
  • nusii_proposals.get_section
    Get Section
  • nusii_proposals.list_themes
    List Themes
  • nusii_proposals.get_proposal
    Get Proposal
  • nusii_proposals.list_clients
    List Clients
  • nusii_proposals.list_sections
    List Sections
  • nusii_proposals.get_account_me
    Get Account Me
  • nusii_proposals.list_proposals
    List Proposals
  • nusii_proposals.list_line_items
    List Line Items
  • nusii_proposals.get_webhook_endpoint
    Get Webhook Endpoint
  • nusii_proposals.list_webhook_endpoints
    List Webhook Endpoints
  • nusii_proposals.list_section_line_items
    List Section Line Items
  • nusii_proposals.list_proposal_activities
    List Proposal Activities

write

9

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

  • nusii_proposals.create_client
    Create Client
  • nusii_proposals.update_client
    Update Client
  • nusii_proposals.create_section
    Create Section
  • nusii_proposals.update_section
    Update Section
  • nusii_proposals.create_proposal
    Create Proposal
  • nusii_proposals.update_proposal
    Update Proposal
  • nusii_proposals.create_line_item
    Create Line Item
  • nusii_proposals.update_line_item
    Update Line Item
  • nusii_proposals.create_webhook_endpoint
    Create Webhook Endpoint

destructive

6

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

  • nusii_proposals.delete_client
    Delete a client
  • nusii_proposals.delete_section
    Delete a section
  • nusii_proposals.delete_proposal
    Delete a proposal
  • nusii_proposals.archive_proposal
    Archive Proposal
  • nusii_proposals.delete_line_item
    Delete Line Item
  • nusii_proposals.delete_webhook_endpoint
    Delete Webhook Endpoint
03 · HOW IT WORKS

Nusii proposals in three steps.

  1. 01Your users connect Nusii proposalsThey add their Nusii proposals api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Client” can wait for the user, and “delete a client” can be denied outright.
  3. 03Any agent can actYour agent calls Nusii proposals 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('nusii_proposals', {
  read: 'allow',
  write: 'ask',        // create_client
  destructive: 'deny',  // delete_client
})

# 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 Nusii proposals connects.

Users add their Nusii proposals 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 Nusii proposals 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 Nusii proposals from any agent.

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

More finance and accounting apps.

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ALL FINANCE AND ACCOUNTING APPS →
07 · FAQ

Nusii proposals and Arc0, answered.

Q01

Can I use Nusii proposals with Claude, ChatGPT or Cursor?

Yes. Connect Nusii proposals 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 Nusii proposals actions you allow.

Q02

How do users connect Nusii proposals?

Users add their Nusii proposals 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 Nusii proposals actions can my agent take?

29 in total: 14 read, 9 write and 6 destructive, such as “create Client”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Nusii proposals?

Yes. Actions like “delete a client” 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 Nusii proposals too?

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

Get started

Plug Nusii proposals into your agent.

Your users connect Nusii proposals once, under your brand. Your agent gets 29 actions behind your policies, with every call on the record.

Connect Nusii proposalsBrowse all apps →

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