> ## Documentation Index
> Fetch the complete documentation index at: https://nango.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Exist

## Overview

> [card] [Pre-built tooling](#pre-built-tooling)

> [card] [Pre-built integrations](#pre-built-integrations)

> [card] [Access requirements](#access-requirements)

> [card] [Setup guide](#setup-guide)

> [card] [Useful links](#useful-links)

> [card] [API gotchas](#api-gotchas)

## Pre-built tooling

> [accordion] ✅ Authorization
>
> | Tools | Status |
> | - | - |
> | Pre-built authorization (OAuth) | ✅ |
> | Credentials auto-refresh | ✅ |
> | Auth parameters validation | ✅ |
> | Pre-built authorization UI | ✅ |
> | Custom authorization UI | ✅ |
> | Expired credentials detection | ✅ |

> [accordion] ✅ Read & write data
>
> | Tools | Status |
> | - | - |
> | Pre-built integrations | ✅ |
> | API unification | ✅ |
> | 2-way sync | ✅ |
> | Webhooks from Nango on data modifications | ✅ |
> | Real-time webhooks from 3rd-party API | 🚫 (time to contribute: \<48h) |
> | Proxy requests | ✅ |

> [accordion] ✅ Observability & data quality
>
> | Tools | Status |
> | - | - |
> | HTTP request logging | ✅ |
> | End-to-end type safety | ✅ |
> | Data runtime validation | ✅ |
> | OpenTelemetry export | ✅ |
> | Slack alerts on errors | ✅ |
> | Integration status API | ✅ |

> [accordion] ✅ Customization
>
> | Tools | Status |
> | - | - |
> | Create or customize use-cases | ✅ |
> | Pre-configured pagination | ✅ |
> | Pre-configured rate-limit handling | 🚫 (time to contribute: \<48h) |
> | Per-customer configurations | ✅ |

### Others

| Function name | Description | Type |
| - | - | - |
| `acquire-attributes` | Take ownership of one or more attributes so this connection can write values for them. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `create-attributes` | Create new custom attributes (or acquire-by-template in one call) and take ownership of them. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `get-attribute-values` | Get the full paged value history for one specific attribute. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `get-correlation` | Look up the correlation (if any) between two specific attributes. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `get-metric-snapshot` | COMPOSITE: get a consolidated view of one metric - its recent values, this week's correlations involving it, and its recent weekly averages - in a single call. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `get-profile` | Get the authenticated user's basic profile and unit preferences. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `increment-attribute-values` | Add to (rather than overwrite) an owned numeric attribute's value for a given date, creating the day's entry if needed. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-attribute-templates` | List the attribute templates Exist supports (the catalog of trackable metrics, not the user's own tracked attributes). | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-attributes-with-values` | List the user's attributes together with their recent values (up to the last 31 days) in one call. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-attributes` | List the user's attributes (metadata only, no values), including templated and custom attributes owned by any service or none. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-averages` | List weekly average values per attribute, optionally filtered by date range, group, or attribute. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-correlations` | List correlations Exist has generated in the last week, optionally filtered by attribute, strength, or confidence. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-insights` | List personalized insights Exist has generated for the user, optionally filtered by date range and priority. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `list-owned-attributes` | List only the attributes this connection's service currently owns (i.e. can write values for). | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `release-attributes` | Give up ownership of one or more attributes, the closest thing to removing an attribute since the provider has no delete endpoint. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `track-custom-metric` | COMPOSITE: record a value for a named metric today (or a given date), automatically creating or re-acquiring the underlying attribute first if needed - the common 'log this custom thing' use case without the caller having to manage attribute lifecycle state themselves. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `update-attribute-values` | Write (overwrite) values for one or more owned attributes on specific dates. | [Tool](https://nango.dev/docs/guides/functions/tools.md) |
| `attribute-values` | Sync the full value history for every currently-owned (active) Exist attribute. | [Sync](https://nango.dev/docs/guides/functions/syncs/sync-functions.md) |
| `attributes` | Sync the user's attribute metadata (templated and custom, active and inactive), without values. | [Sync](https://nango.dev/docs/guides/functions/syncs/sync-functions.md) |
| `averages` | Sync weekly average values per attribute. | [Sync](https://nango.dev/docs/guides/functions/syncs/sync-functions.md) |
| `insights` | Sync the personalized insights Exist has generated for the user. | [Sync](https://nango.dev/docs/guides/functions/syncs/sync-functions.md) |

> [!NOTE]
>
> Nango has a [Nango-managed OAuth app](https://nango.dev/docs/guides/auth/auth-guide.md#nango-managed-oauth-apps) you can use in development and production. Select it when you create the integration.

## Access requirements

| Pre-Requisites | Status | Comment |
| - | - | - |
| Paid dev account | ❓ | |
| Paid test account | ❓ | |
| Partnership | ❓ | |
| App review | ❓ | |
| Security audit | ❓ | |

## Setup guide

*No setup guide yet.*

> [!TIP]
>
> Need help getting started? Get help in the [community](https://nango.dev/slack).

> [!NOTE]
>
> Contribute improvements to the setup guide by [editing this page](https://github.com/nangohq/nango/tree/master/docs/integrations/all/exist.mdx)

## Useful links

* [How to register an Application](https://developer.exist.io/reference/authentication/oauth2/#overview)
* [OAuth-related docs](https://developer.exist.io/reference/authentication/oauth2/)
* [List of OAuth scopes](https://developer.exist.io/reference/authentication/oauth2/#scopes)
* [Web API docs (their REST API)](https://developer.exist.io/reference/attributes/)

> [!NOTE]
>
> Contribute useful links by [editing this page](https://github.com/nangohq/nango/tree/master/docs/integrations/all/exist.mdx)

## API gotchas

The lifetime of an access token is an year

> [!NOTE]
>
> Contribute API gotchas by [editing this page](https://github.com/nangohq/nango/tree/master/docs/integrations/all/exist.mdx)


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