Get started

Amazing Marvin for AI agents

Amazing Marvin is a personal productivity app for managing tasks, projects, habits, and time tracking, with a highly customizable planning workflow for individual users. 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 Amazing MarvinSee the 10 actions ↓
ProductivityAPI keyMCP + RESTamazingmarvin.com
AUDIT LOG · AMAZING MARVINPOLICY: acme-support
09:41:07 · claude · u_8f2read
amazing_marvin.list_reminders
List Reminders✓ allowed · 212ms
09:41:08 · claude · u_8f2read
amazing_marvin.list_planning_items
List Planning Items✓ allowed · 164ms
09:41:09 · claude · u_8f2write
amazing_marvin.create_task
Create Task✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
amazing_marvin.delete_reminders
Delete Reminders✕ blocked · policy: deny
EVERY AMAZING MARVIN CALL, ON THE RECORD
01 · USE CASES

What agents do in Amazing Marvin.

01

Add a task to a project

Create a new task under a project, tagged with the right category or label.

02

Check today's planning items

List planning items and current time tracking to see what is scheduled for today.

03

Confirm before clearing reminders

Deleting existing reminders changes what the user gets notified about, so it should be confirmed first.

02 · ACTIONS

10 Amazing Marvin actions, graded by risk.

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

read

4

Look things up. Allowed by default.

  • amazing_marvin.list_reminders
    List Reminders
  • amazing_marvin.list_planning_items
    List Planning Items
  • amazing_marvin.get_current_time_tracking
    Get Current Time Tracking
  • amazing_marvin.list_categories_or_labels
    List Categories or Labels

write

5

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

  • amazing_marvin.create_task
    Create Task
  • amazing_marvin.create_project
    Create Project
  • amazing_marvin.complete_task
    Complete Task
  • amazing_marvin.set_reminders
    Set Reminders
  • amazing_marvin.set_time_tracking
    Set Time Tracking

destructive

1

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

  • amazing_marvin.delete_reminders
    Delete Reminders
03 · HOW IT WORKS

Amazing Marvin in three steps.

  1. 01Your users connect Amazing MarvinThey add their Amazing Marvin api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create Task” can wait for the user, and “delete Reminders” can be denied outright.
  3. 03Any agent can actYour agent calls Amazing Marvin 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('amazing_marvin', {
  read: 'allow',
  write: 'ask',        // create_task
  destructive: 'deny',  // delete_reminders
})

# 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 Amazing Marvin connects.

Users add their Amazing Marvin 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 Amazing Marvin 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 Amazing Marvin from any agent.

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

More productivity apps.

Notion57 actionsAirtable27 actionsConfluence70 actionsClickUp164 actionsRentman130 actionsHub Planner122 actionsCoda110 actionsOutline101 actions
ALL PRODUCTIVITY APPS →
07 · FAQ

Amazing Marvin and Arc0, answered.

Q01

Can I use Amazing Marvin with Claude, ChatGPT or Cursor?

Yes. Connect Amazing Marvin 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 Amazing Marvin actions you allow.

Q02

How do users connect Amazing Marvin?

Users add their Amazing Marvin 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 Amazing Marvin actions can my agent take?

10 in total: 4 read, 5 write and 1 destructive, such as “create Task”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Amazing Marvin?

Yes. Actions like “delete Reminders” 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 Amazing Marvin too?

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

Get started

Plug Amazing Marvin into your agent.

Your users connect Amazing Marvin once, under your brand. Your agent gets 10 actions behind your policies, with every call on the record.

Connect Amazing MarvinBrowse all apps →

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