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Exist for AI agents

Exist is a personal analytics app that combines data from other services to help people understand patterns in their daily life. 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 ExistSee the 12 actions ↓
AnalyticsOAuth 2.0MCP + RESTexist.io
AUDIT LOG · EXISTPOLICY: acme-support
09:41:07 · claude · u_8f2read
exist.get_averages
Get Averages✓ allowed · 212ms
09:41:08 · claude · u_8f2read
exist.get_insights
Get Insights✓ allowed · 164ms
09:41:09 · claude · u_8f2write
exist.oauth2_authorize
Exist OAuth2 Authorize✓ approved · approved by user
EVERY EXIST CALL, ON THE RECORD
01 · USE CASES

What agents do in Exist.

01

Check today's attribute values

Get a user's attribute values for today, like sleep or mood, to answer a question about their trends.

02

Pull correlations between habits

Get correlations between two tracked attributes to explain what might be affecting a metric.

03

Read-only personal insight checks

Keep attribute and insight lookups read-only, since this data is personal and only meant to inform, not change.

02 · ACTIONS

12 Exist actions, graded by risk.

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

read

8

Look things up. Allowed by default.

  • exist.get_averages
    Get Averages
  • exist.get_insights
    Get Insights
  • exist.get_correlations
    Get Correlations
  • exist.get_user_profile
    Get User Profile
  • exist.get_user_attributes
    Get User Attributes
  • exist.get_owned_attributes
    Get Owned Attributes
  • exist.get_attribute_templates
    Get Attribute Templates
  • exist.get_attributes_with_values
    Get Attributes With Values

write

4

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

  • exist.oauth2_authorize
    Exist OAuth2 Authorize
  • exist.increment_attribute_values
    Increment Attribute Values
  • exist.acquire_attribute_ownership
    Acquire Attribute Ownership
  • exist.release_attribute_ownership
    Release Attribute Ownership

destructive

0

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

  • No destructive actions.
03 · HOW IT WORKS

Exist in three steps.

  1. 01Your users connect ExistThey sign in to Exist on Arc0 Connect, under your brand, and approve the access you ask for.
  2. 02You set the rulesReads run, and writes like “exist OAuth2 Authorize” can wait for the user to approve.
  3. 03Any agent can actYour agent calls Exist 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('exist', {
  read: 'allow',
  write: 'ask',        // oauth2_authorize
  destructive: 'deny',  
})

# 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 Exist connects.

Users sign in to Exist on Arc0 Connect and approve the scopes you request. Build with Arc0’s Exist OAuth app, or bring your own so the Exist consent screen names you. Tokens refresh automatically, and you can export them whenever you want.

The same Exist 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
OAuth 2.0
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Exist from any agent.

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

More analytics apps.

Gong58 actionsSerpApi59 actionsPeople Data Labs27 actionsPostHog507 actions21risk8 actionsAkta19 actionsAlpha Vantage56 actionsAmplitude54 actions
ALL ANALYTICS APPS →
07 · FAQ

Exist and Arc0, answered.

Q01

Can I use Exist with Claude, ChatGPT or Cursor?

Yes. Connect Exist 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 Exist actions you allow.

Q02

How do users connect Exist?

Users sign in to Exist on Arc0 Connect and approve the scopes you request. Build with Arc0’s Exist OAuth app, or bring your own so the Exist consent screen names you. Tokens refresh automatically, and you can export them whenever you want.

Q03

Which Exist actions can my agent take?

12 in total: 8 read, 4 write and 0 destructive, such as “exist OAuth2 Authorize”. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in Exist?

Yes. Allow read actions and deny writes in the Exist policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call Exist too?

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

Get started

Plug Exist into your agent.

Your users connect Exist once, under your brand. Your agent gets 12 actions behind your policies, with every call on the record.

Connect ExistBrowse all apps →

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