Opal Activities API

## Activities Overview In Opal, "activities" encompass both things like someone adding an asset to content and also someone sending a chat message. In the user interface, these are called "Chat & Activity" but the underlying resource is always an `activity` record. This API currently supports _retrieving_ all types of activity (see the `activity_types` endpoint to retrieve a list of supported types). It only supports _creating_ chat activity. ## Checkpoints The `checkpoints` endpoints are how activities get marked as read for users. The idea is that any activity older than the most recent checkpoint has been seen by the user. ## User @mentions User mentions are represented in the plaintext body of activity messages. You can create them (or interpret them) using the following syntax: ``` @[{{user name}}](user:{{user_id}}) ``` The double-bracketed `{{user name}}` should be replaced with the user's full name (not their "username" or email) and `{{user_id}}` should be replaced with the user's _integer_ id value (not a UUID). Do not use quotation marks or spaces (except between the parts of a user's name). For example, `[John Doe](user:1234)`.

Operations 5

GET /activities/v1/{entity_type}/activity_types Returns a list of possible activity types for a given object, as specified by the entity_type parameter #
GET /activities/v1/{entity_type}/{entity_id} Returns all activities for a given object, as specified by the entity_type parameter. #
POST /activities/v1/{entity_type}/{entity_id} Create an activity for a given moment or piece of content #
GET /activities/v1/{entity_type}/{entity_id}/checkpoint Returns latest checkpoint for a given entity and user #
POST /activities/v1/{entity_type}/{entity_id}/checkpoint Create a checkpoint for a give entity #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/opal-activities-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

opal-activities-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  version: 2.0.0
  title: Opal Activities API
  license:
    name: Opal API License
    url: https://www.workwithopal.com/api-license
  description: "The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “NOT RECOMMENDED”, “MAY”, and “OPTIONAL” in this document are to be interpreted as described in [BCP 14](https://tools.ietf.org/html/bcp14) [[RFC2119](https://tools.ietf.org/html/rfc2119)] [[RFC8174](https://tools.ietf.org/html/rfc8174)] when, and only when, they appear in all capitals, as shown here.\n\n# Other API Versions\n\nThe [v3 API](/api/documentation/v3) is less complete than the v2 API, and is still a work in progress. Currently, if a resource has endpoints in both the v2 API and the v3 API you **SHOULD** use the v2 API endpoints. At some point in the future we will recommend the v3 API instead.\n\n# Documentation Organization\n\nv2 API endpoints are categorized by stability:\n\n1. JSON:API\n2. Other\n3. Unstable\n4. Proposed\n\nv2 API endpoints in the “JSON:API”, “Unstable”, and “Proposed” categories are [JSON:API](https://jsonapi.org)-compliant ([specification](https://jsonapi.org/format/)) and can be used with any [JSON:API-compliant client](https://jsonapi.org/implementations/).\n\n<aside>\n\nTo strictly comply with the JSON:API specification your requests for endpoints in the “JSON:API”, “Unstable”, and “Proposed” categories **MUST** set the `Accept` HTTP header to `application/vnd.api+json`. The server response’s `Content-Type` HTTP header will also be `application/vnd.api+json`.\n\nYou **SHOULD** use `application/vnd.api+json` for maximum stability, but v2 API endpoints **MAY** allow the `Accept` HTTP header to be `application/json`; if so, the response’s `Content-Type` HTTP header will be `application/json`. This support for `application/json` **MAY** disappear from a given endpoint at any time, and is not available on all endpoints.\n</aside>\n\n“Other” endpoints are stable, but do not follow the JSON:API specification. (Some “Other” endpoints have data that resembles the JSON:API structure, but **MUST** be parsed as generic JSON.) Your requests **MUST** set the `Accept` HTTP header to `application/json`, and the response’s `Content-Type` HTTP header will be `application/json`.\n\n## Unstable Endpoints\n\n*Note:* This generally refers resources in the “Unstable” category, but includes endpoints with a summary that’s prefixed by `[UNSTABLE]`. These `[UNSTABLE]` endpoints may be part of a “Stable” resource.\n\nThe data structure and behavior of “Unstable” endpoints are not guaranteed, and we **MAY** change them at any time. You **MUST NOT** use these endpoints for production features, but **MAY** use them as a preview of upcoming features, and we welcome feedback.\n\n## Proposed Endpoints\n\n“Proposed” endpoints **MUST NOT** be used (they’re not yet implemented), and we **MAY** change or remove them at any time. We publish them at our discretion to share our plans and encourage internal feedback. We also welcome your feedback.\n\n# Design Principles\n\n## Breaking Changes\n\nWe **MAY** expand the data for “JSON:API” and “Other” resources, but will not change or remove existing attributes or relationships for these resources. These expansions should not require any changes to your code.\n\nWe provide no guarantees for “Unstable” and “Proposed” endpoints.\n\n## Firehose Rule\n\nBy default endpoints include all the relevant data that’s accessible to the authenticated user. Clients **MAY** specify filters, ordering, pagination, sparse fields, and other limiting mechanisms to pare down the desired data.\n\n*Note:* Existing endpoints **MAY NOT** follow this maximalist approach, but new endpoints will, and we **MAY** enhance existing endpoints.\n\n## Obscurity\n\nIn order to provide customers with as much privacy as possible, many API calls that fail authorization will return `404 Not Found` rather than `403 Forbidden`. Do not design frontends around the expectation that a `404 Not Found` status code means a resource would not be returned given different authentication credentials.\n\n# Authentication Strategies\n## OAuth 2.0\nOpal uses OAuth 2.0 (https://oauth.net/2) to authenticate users and grant access to protected resources. After registering your application as an OAuth client, you must get permission from each user before accessing their account.\n\nThe main steps are:\n\n1. Register your application\n2. Direct the user to Opal, to authorize your application\n3. Opal confirm's user identity, and asks the user to grant your application permissions\n4. Opal issues tokens your application can use to access the user's Opal resources\n5. Your application can begin making requests to the Opal API on behalf of the user\n\n### Roles\n#### Client\nThe 3rd-party application accessing the API on behalf of the User.\n\n#### API\nAPI endpoints used to interact with a User's resources in Opal.\n\n#### User\nThe person authorizing the Client to access to their Opal account.\n\n### Registering your application\nApplication registration is currently a manual process.\n\nTo begin, you will need to provide the following information to the Opal integrations team:\n\n- Application name\n- Logo URI\n- Redirect URI\n\nIn return, expect to receive:\n\n- Client ID\n  - public\n- Application secret\n  - keep this private\n  - keep this written down someplace safe. Opal cannot retrieve this for you if it is lost.\n\n### Authorization\nFor a Client to make API requests on behalf of Users, the User must first give consent.\nHere is an overview of the consent flow:\n\n1. Direct the User to grant access in Opal\n\n```\nhttps://login.ouropal.com/oauth2/auth?grant_type=authorization_code&scope=offline_access&response_type=code&client_id={client_id}&state={state}&redirect_uri={url_encoded_redirect}\n```\n\nParameters:\n- `client_id`: Provided by Opal.\n- `grant_type`: Set the value to authorization_code to receive a code string that can be exchanged for an access token.\n- `redirect_uri`: Defined by Client. After authentication, the user will be directed to this location.\n- `response_type`: The value code should be set for refresh tokens to be issued.\n- `scope`: The value offline_access must be present if you wish to use refresh tokens.\n- `state`: Defined by the Client. A unique value used to validate the response.\n\n\n2. If logged out, User is directed to log in to Opal\n\n3. User is redirected to consent page (if the User has not already given consent)\n\n```\nhttps://login.ouropal.com/oauth2/consent?consent_challenge=abc123\n```\n\n4. If the User grants permission, User is sent to the specified `redirect_uri`\n\n```\nhttps://example.com/defined-by-client?code=Mu9z2DndN7TfXSLaf99O8ReqqXqMabXhSqP5e0jlx_Q.naLKbko-GyfPJRGYcWyclxU0sBGwygPy05OSFww0XZ8&scope=offline_access&state={state}\n```\n\nParameters:\n- `code`: The Client may use this to get an access token.\n- `scope`: API permissions granted to the Client by the User.\n- `state`: The validation string provided by the Client in step 1.\n\nIf the User declines the consent prompt, User will be sent to the same `redirect_uri`, but with an error parameter :\n\n```\nhttps://example.com/defined-by-client?error=consent+request+denied&state={state}\n```\n\nParameters:\n- `error`: A brief description of the issue.\n- `state`: The validation string provided by the Client in step 1.\n\n### Retrieving Access Token\nYou must make a POST request to the token endpoint to get an access token, before the code expires:\n\n```\ncurl -X POST \\\n  https://login.ouropal.com/oauth2/token \\\n  -H 'Content-Type: application/x-www-form-urlencoded' \\\n  -d 'code={code}&client_id={client_id}&redirect_uri={url_encoded_redirect}&client_secret={client_secret}&grant_type=authorization_code'\n```\n\nParameters:\n- `code`\n- `client_id`: Client ID provided by Opal.\n- `client_secret`: Client secret provided by Opal.\n- `grant_type`: Set value to authorization_code .\n- `redirect_uri`: Optional.\n\nIf successful, a JSON-formatted response body will contain the access_token and refresh_token:\n\n```json\n{\n  \"access_token\":\"ABC123\",\n  \"token_type\":\"bearer\",\n  \"expires_in\":3600,\n  \"refresh_token\":\"DEF456\",\n  \"scope\":\"offline_access\"\n}\n```\n\n### Refreshing an Access Token\nOnce the access_token expires, you may generate a new one at the same token endpoint, but with different parameters.\nNote that in this request, a \"refresh_token\" parameter is used instead of \"code\", and the \"grant_type\" value is now \"refresh_token\" instead of \"authorization_code\".\n\n```\ncurl -X POST \\\n  https://login.ouropal.com/oauth2/token \\\n  -H 'Content-Type: application/x-www-form-urlencoded' \\\n  -d 'refresh_token={refresh_token}&client_id={client_id}&redirect_uri={url_encoded_redirect}&client_secret={secret}&grant_type=refresh_token'\n```\n\nParameters:\n- `client_id`: Client ID provided by Opal.\n- `client_secret`: Client secret provided by Opal.\n- `grant_type`: Set value to refresh_token .\n- `redirect_uri`: Optional.\n- `refresh_token`: Refresh token value\n\n### Making Authenticated Requests\n\nSet an authorization header in your requests, specifying your access token as documented here: https://tools.ietf.org/html/rfc6750#section-2.1.\n\n**NOTE** that the `Authorization` header supercedes the `Session-Token` header described in the documentation for many endpoints. Specifying an `Authorization` header means you do not need to specify a `Session-Token` header.\n\n```\nAuthorization: Bearer ACCESS_TOKEN\n```\n\nFor example:\n```\n     GET /resource HTTP/1.1\n     Host: server.example.com\n     Authorization: Bearer mF_9.B5f-4.1JqM\n```\n\n### Client Revoke/Rolling OAuth secrets\nClient secrets must be kept secret and not exposed outside of the token retrieval requests. If a secret has been potentially compromised, please notify Opal as soon as possible and let us know the OAuth client id associated with the secret. We will roll/update the secret, which will invalidate all existing access and refresh tokens. Invalidating tokens will cause users to need to reauthenticate, but consent should be remembered.\n"
servers:
- url: https://login.ouropal.com
tags:
- name: Activities
  description: '## Activities Overview

    In Opal, "activities" encompass both things like someone adding an asset to content and also someone sending a chat message. In the user interface, these are called "Chat & Activity" but the underlying resource is always an `activity` record.


    This API currently supports _retrieving_ all types of activity (see the `activity_types` endpoint to retrieve a list of supported types). It only supports _creating_ chat activity.


    ## Checkpoints

    The `checkpoints` endpoints are how activities get marked as read for users. The idea is that any activity older than the most recent checkpoint has been seen by the user.


    ## User @mentions

    User mentions are represented in the plaintext body of activity messages. You can create them (or interpret them) using the following syntax:

    ```

    @[{{user name}}](user:{{user_id}})

    ```


    The double-bracketed `{{user name}}` should be replaced with the user''s full name (not their "username" or email) and `{{user_id}}` should be replaced with the user''s _integer_ id value (not a UUID). Do not use quotation marks or spaces (except between the parts of a user''s name). For example, `[John Doe](user:1234)`.

    '
paths:
  /activities/v1/{entity_type}/activity_types:
    get:
      tags:
      - Activities
      operationId: ReadActivityTypesV1
      summary: Returns a list of possible activity types for a given object, as specified by the entity_type parameter
      security:
      - oauth2:
        - offline_access
      - api_key:
        - Session-Token
      parameters:
      - name: entity_type
        in: path
        required: true
        description: The type of object to fetch activities for
        schema:
          type: string
          enum:
          - content
          - moments
      responses:
        '200':
          description: An array of activity types
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                properties:
                  data:
                    type: array
                    items:
                      title: activity type
                      type: object
                      required:
                      - id
                      - type
                      - attributes
                      additionalProperties: false
                      properties:
                        id:
                          type: string
                          pattern: ^[0-9]+$
                        type:
                          type: string
                          enum:
                          - activity_type
                        attributes:
                          type: object
                          required:
                          - verb
                          - object
                          additionalProperties: false
                          properties:
                            verb:
                              type: string
                              description: The action (verb).
                            object:
                              type: string
                              description: The thing being acted upon.
                  meta:
                    type: object
                    required:
                    - total
                    - page
                    properties:
                      total:
                        type: integer
                      page:
                        type: object
                        required:
                        - limit
                        - offset
                        properties:
                          limit:
                            type: integer
                          offset:
                            type: integer
              example:
                data:
                - id: '2'
                  type: activity_type
                  attributes:
                    object: moment
                    verb: comment
                - id: '3'
                  type: activity_type
                  attributes:
                    object: moment
                    verb: duplicate
                meta:
                  total: 2
                  page:
                    limit: 50
                    offset: 0
  /activities/v1/{entity_type}/{entity_id}:
    get:
      tags:
      - Activities
      operationId: ReadActivitiesV1
      summary: Returns all activities for a given object, as specified by the entity_type parameter.
      security:
      - oauth2:
        - offline_access
      - api_key:
        - Session-Token
      parameters:
      - name: entity_type
        in: path
        required: true
        description: The type of object to fetch activities for
        schema:
          type: string
          enum:
          - content
          - moments
      - name: entity_id
        in: path
        required: true
        description: The ID of the entity to fetch activities for. The type is determined by the entity_type parameter
        schema:
          type: string
      - name: include
        in: query
        required: false
        description: A comma separated list of related objects to include
        schema:
          type: array
          items:
            type: string
            enum:
            - user
            - activity_type
            - asset_references
            - reactions
        style: form
        explode: false
      responses:
        '200':
          description: An array of activities
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                properties:
                  data:
                    type: array
                    items:
                      title: activity
                      type: object
                      required:
                      - relationships
                      - id
                      - attributes
                      - type
                      additionalProperties: false
                      properties:
                        id:
                          type: string
                          pattern: ^[0-9]+$
                        type:
                          type: string
                          enum:
                          - activity
                        relationships:
                          type: object
                          additionalProperties: false
                          properties:
                            user:
                              type: object
                              required:
                              - data
                              additionalProperties: false
                              properties:
                                data:
                                  type: object
                                  required:
                                  - id
                                  - type
                                  additionalProperties: false
                                  properties:
                                    id:
                                      type: string
                                    type:
                                      type: string
                                      enum:
                                      - user
                            activity_type:
                              type: object
                              required:
                              - data
                              additionalProperties: false
                              properties:
                                data:
                                  type: object
                                  required:
                                  - id
                                  - type
                                  additionalProperties: false
                                  properties:
                                    id:
                                      type: string
                                    type:
                                      type: string
                                      enum:
                                      - activity_type
                            asset_references:
                              type: object
                              required:
                              - data
                              additionalProperties: false
                              properties:
                                data:
                                  type: array
                                  items:
                                    type: object
                                    required:
                                    - id
                                    - type
                                    additionalProperties: false
                                    properties:
                                      id:
                                        type: string
                                      type:
                                        type: string
                                        enum:
                                        - asset_reference
                            reactions:
                              type: object
                              required:
                              - data
                              additionalProperties: false
                              properties:
                                data:
                                  type: array
                                  items:
                                    type: object
                                    required:
                                    - id
                                    - type
                                    additionalProperties: false
                                    properties:
                                      id:
                                        type: string
                                      type:
                                        type: string
                                        enum:
                                        - reaction
                        attributes:
                          type: object
                          required:
                          - comment
                          - created_at
                          additionalProperties: false
                          properties:
                            comment:
                              type:
                              - string
                              - 'null'
                            created_at:
                              type: string
                              format: date-time
                              description: An ISO8601 date-time.
                              readOnly: true
                  included:
                    type: array
                    items:
                      oneOf:
                      - title: asset_reference
                        type: object
                        required:
                        - id
                        - attributes
                        - type
                        - relationships
                        additionalProperties: false
                        properties:
                          id:
                            type: string
                            pattern: ^[0-9]+$
                          type:
                            type: string
                            enum:
                            - asset_reference
                          attributes:
                            type: object
                            required:
                            - asset_type
                            - asset_uuid
                            - content_type
                            - format
                            - filename
                            - escaped_filename
                            - filesize
                            - full_url
                            - meta_data
                            - original_url
                            - preview_url
                            - public_id
                            - width
                            - height
                            - uuid
                            additionalProperties: false
                            properties:
                              asset_type:
                                type:
                                - string
                                - 'null'
                                description: 'This field is semi-open ended but should be set to `image`, `audio`,

                                  or `video` for those respective types of media and `file` for most

                                  other types of media.

                                  '
                              asset_source:
                                type:
                                - string
                                - 'null'
                                description: 'Asset Sources are pre-existing records indicating the origin of an

                                  asset reference. You can''t set this field to arbitrary values. If you

                                  know of an Asset Source and you''d like to indicate a new asset

                                  reference originated with that source, this field should contain that

                                  source''s name.

                                  '
                              asset_uuid:
                                type:
                                - string
                                - 'null'
                                description: 'The `id` of an `asset` resource this asset reference will surface

                                  within the Asset Library.

                                  '
                              content_type:
                                type:
                                - string
                                - 'null'
                                description: 'This field was used by some legacy systems. It is exposed for

                                  historical reasons. If set, setting it to the same value as

                                  `asset_type` is generally a good idea. It is not a MIME type.

                                  '
                              description:
                                type:
                                - string
                                - 'null'
                              format:
                                type:
                                - string
                                - 'null'
                                description: 'Used differently by some legacy systems but any new asset reference

                                  should use the `format` field to store its filetype extension (ex. `png`,

                                  `mp4`, `gif`, `mov`, etc.).

                                  '
                              filename:
                                type:
                                - string
                                - 'null'
                              escaped_filename:
                                type: string
                                readOnly: true
                              filesize:
                                type:
                                - integer
                                - 'null'
                                description: Size of file in bytes.
                              full_url:
                                type:
                                - string
                                - 'null'
                                description: 'When associating an asset with an asset reference, this field

                                  should be set to the `url` property of the asset.

                                  '
                              meta_data:
                                type:
                                - object
                                - 'null'
                                description: Can contain arbitrary key-value pairs related to the asset.
                                properties:
                                  duration:
                                    type: string
                                    description: Parsed from video assets.
                                  page_count:
                                    type: string
                                    description: Parsed from PDF assets.
                                  processed_height:
                                    type: string
                                    description: Parsed from video assets.
                                  processed_width:
                                    type: string
                                    description: Parsed from video assets.
                                additionalProperties:
                                  type: string
                              original_url:
                                type:
                                - string
                                - 'null'
                              preview_url:
                                type:
                                - string
                                - 'null'
                                readOnly: true
                              public_id:
                                type:
                                - string
                                - 'null'
                              width:
                                type:
                                - integer
                                - 'null'
                                description: 'When associating an asset with an asset reference, this field

                                  should be set to the `width` of the asset.

                                  '
                              height:
                                type:
                                - integer
                                - 'null'
                                description: 'When associating an asset with an asset reference, this field

                                  should be set to the `height` of the asset.

                                  '
                              uuid:
                                type: string
                                readOnly: true
                                description: 'Use this ID when referring to the same asset reference from one of

                                  Opal''s v3 APIs.

                                  '
                          relationships:
                            type: object
                            additionalProperties: false
                            properties:
                              brand:
                                type: object
                                required:
                                - data
                                additionalProperties: false
                                properties:
                                  data:
                                    type:
                                    - object
                                    - 'null'
                                    required:
                                    - id
                                    - type
                                    additionalProperties: false
                                    properties:
                                      id:
                                        type: string
                                      type:
                                        type: string
                                        enum:
                                        - brand
                              stories:
                                type: object
                                required:
                                - data
                                additionalProperties: false
                                properties:
                                  data:
                                    type: array
                                    items:
                                      type: object
                                      required:
                                      - id
                                      - type
                                      additionalProperties: false
                                      properties:
                                        id:
                                          type: string
                                        type:
                                          type: string
                                          enum:
                                          - story
                              cover_asset_reference:
                                type: object
                                required:
                                - data
                                additionalProperties: false
                                properties:
                                  data:
                                    type:
                                    - object
                                    - 'null'
                                    required:
                                    - id
                                    - type
                                    additionalProperties: false
                                    properties:
                                      id:
                                        type: string
                                      type:
                                        type: string
                                        enum:
                                        - asset_reference
                              labels:
                                type: object
                                required:
                                - data
                                additionalProperties: false
                                properties:
                                  data:
                                    type: array
                                    items:
                                      type: object
          

# --- truncated at 32 KB (101 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/opal/refs/heads/main/openapi/opal-activities-api-openapi.yml