Nylas Application-level workflows API

openapi: 3.2.0
info:
  title: Nylas Application-level workflows API
  version: v3
  summary: The complete Nylas v3 API — Email, Calendar, Contacts, Notetaker, Scheduling, Administration, and Migration.
  description: The Nylas API is designed using the REST ideology to provide simple and predictable URIs to access and modify objects.
  contact:
    url: https://www.nylas.com/
  x-provenance:
    method: harvested
    first_party: true
    publisher: Nylas
    source: https://developer.nylas.com/_spec-files/nylas-api.yaml
    harvested: '2026-08-21'
    sha256: 7ff001d571e163b1ffe22178741b59f813d8208ec878157a839a33dc2c13fd35
    bytes: 1666223
    note: 'Published by Nylas as the unified contract for the Nylas v3 API and stored verbatim; API Evangelist added only this provenance block. Submitted by the provider in api-evangelist/nylas#1 and verified against the live URL before harvest: OpenAPI 3.1.0, 118 paths, 208 operations, 174 component schemas, 100% of operations carrying summary, description, tag and a unique operationId, x-code-samples on 208 of 208. This document REPLACES a 22-operation scaffold API Evangelist derived from reading the documentation, now quarantined under openapi/_scaffold/.'
  x-evidence:
  - url: https://developer.nylas.com/_spec-files/nylas-api.yaml
    what: the published unified contract, harvested verbatim 2026-08-21 (200, text/yaml, 1,666,223 bytes)
  - url: https://developer.nylas.com/.well-known/api-catalog
    what: RFC 9727 linkset advertising that URL as service-desc for api.us.nylas.com and api.eu.nylas.com (200, application/linkset+json)
servers:
- url: https://api.us.nylas.com
  description: U.S.
- url: https://api.eu.nylas.com
  description: E.U.
security:
- ACCESS_TOKEN: []
- NYLAS_API_KEY: []
tags:
- name: Application-level workflows
  description: 'Application-level workflows automatically send messages to certain users when a defined event is triggered. For example, if you want to send a confirmation message when a user schedules a booking, you can create a workflow that listens for `booking.created` events.


    Each workflow is linked to the Nylas application associated with the API key specified in a Create Workflow request.


    💡 If you want to create workflows for specific grants, use the grant-level workflows endpoints.'
paths:
  /v3/workflows:
    get:
      summary: Return all workflows
      tags:
      - Application-level workflows
      operationId: list-workflows
      description: Returns all application-level workflows.
      x-scopes:
        google:
          min: ''
        microsoft:
          min: ''
        yahoo:
          min: ''
      security:
      - NYLAS_API_KEY: []
      parameters:
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/page_token'
      x-code-samples:
      - lang: bash
        label: cURL
        source: "curl --request GET \\\n  --url \"https://api.us.nylas.com/v3/workflows?limit=10\" \\\n  --header 'Accept: application/json' \\\n  --header 'Authorization: Bearer <NYLAS_API_KEY>' \\\n  --header 'Content-Type: application/json'"
      responses:
        '200':
          $ref: '#/components/responses/workflows_list'
        '400':
          $ref: '#/components/responses/workflow_400'
    post:
      summary: Create a workflow
      tags:
      - Application-level workflows
      operationId: create-workflow
      description: 'Creates an application-level workflow.


        ℹ️ You must have an existing template to create a workflow.'
      x-scopes:
        google:
          min: ''
        microsoft:
          min: ''
        yahoo:
          min: ''
      security:
      - NYLAS_API_KEY: []
      requestBody:
        $ref: '#/components/requestBodies/workflow_create'
      x-code-samples:
      - lang: bash
        label: cURL
        source: "curl --request POST \\\n  --url \"https://api.us.nylas.com/v3/workflows\" \\\n  --header 'Accept: application/json' \\\n  --header 'Authorization: Bearer <NYLAS_API_KEY>' \\\n  --header 'Content-Type: application/json' \\\n  --data '{\n    \"name\": \"Confirmation Workflow\",\n    \"trigger_event\": \"booking.created\",\n    \"template_id\": \"<TEMPLATE_ID>\",\n    \"delay\": 1,\n    \"is_enabled\": true\n  }'"
      responses:
        '200':
          $ref: '#/components/responses/workflow'
        '400':
          $ref: '#/components/responses/workflow_400'
        '404':
          $ref: '#/components/responses/workflow_404'
  /v3/workflows/{workflow_id}:
    parameters:
    - schema:
        type: string
      name: workflow_id
      in: path
      required: true
      description: The ID of the workflow to access.
      example: b79c82b2-a51b-4c54-8469-28006a43551a
    get:
      summary: Return a workflow
      tags:
      - Application-level workflows
      operationId: get-workflow
      description: Returns the specified application-level workflow.
      x-scopes:
        google:
          min: ''
        microsoft:
          min: ''
        yahoo:
          min: ''
      security:
      - NYLAS_API_KEY: []
      x-code-samples:
      - lang: bash
        label: cURL
        source: "curl --request GET \\\n  --url \"https://api.us.nylas.com/v3/workflows/<WORKFLOW_ID>\" \\\n  --header 'Accept: application/json' \\\n  --header 'Authorization: Bearer <NYLAS_API_KEY>' \\\n  --header 'Content-Type: application/json'"
      responses:
        '200':
          $ref: '#/components/responses/workflow'
        '400':
          $ref: '#/components/responses/400'
    put:
      summary: Update a workflow
      tags:
      - Application-level workflows
      operationId: update-workflow
      description: Updates the specified application-level workflow.
      x-scopes:
        google:
          min: ''
        microsoft:
          min: ''
        yahoo:
          min: ''
      security:
      - NYLAS_API_KEY: []
      requestBody:
        $ref: '#/components/requestBodies/workflow_update'
      x-code-samples:
      - lang: bash
        label: cURL
        source: "curl --request PUT \\\n  --url \"https://api.us.nylas.com/v3/workflows/<WORKFLOW_ID>\" \\\n  --header 'Accept: application/json' \\\n  --header 'Authorization: Bearer <NYLAS_API_KEY>' \\\n  --header 'Content-Type: application/json' \\\n  --data '{\n    \"name\": \"Updated Workflow\",\n    \"is_enabled\": false\n  }'"
      responses:
        '200':
          $ref: '#/components/responses/workflow'
        '400':
          $ref: '#/components/responses/workflow_400'
        '404':
          $ref: '#/components/responses/workflow_404'
    delete:
      summary: Delete a workflow
      tags:
      - Application-level workflows
      operationId: delete-workflow
      description: Deletes the specified application-level workflow.
      x-scopes:
        google:
          min: ''
        microsoft:
          min: ''
        yahoo:
          min: ''
      security:
      - NYLAS_API_KEY: []
      x-code-samples:
      - lang: bash
        label: cURL
        source: "curl --request DELETE \\\n  --url \"https://api.us.nylas.com/v3/workflows/<WORKFLOW_ID>\" \\\n  --header 'Accept: application/json' \\\n  --header 'Authorization: Bearer <NYLAS_API_KEY>' \\\n  --header 'Content-Type: application/json'"
      responses:
        '200':
          $ref: '#/components/responses/delete_200_simple'
        '400':
          $ref: '#/components/responses/400'
components:
  responses:
    workflow_400:
      description: 'Error: Bad request'
      content:
        application/json:
          schema:
            type: object
            required:
            - error
            - request_id
            properties:
              request_id:
                type: string
                description: The ID of the request.
                example: 02674fc0-b8cf-43cd-8bd2-506fa401b81f
              error:
                type: object
                required:
                - message
                - type
                properties:
                  type:
                    type: string
                    description: The type of error that occurred.
                    example: api.invalid_request_error
                  message:
                    type: string
                    description: A human-readable message describing the error.
                    example: invalid_event is not a valid option
    delete_200_simple:
      description: 'Success: Object deleted'
      content:
        application/json:
          schema:
            type: object
            required:
            - request_id
            properties:
              request_id:
                type: string
                description: The ID of the request.
                example: 3906564297-48e7fb5b-f220-427b-a4de-255736adba08
    workflows_list:
      description: Success. Returns list of workflows.
      content:
        application/json:
          schema:
            type: object
            required:
            - data
            - next_cursor
            - request_id
            properties:
              request_id:
                type: string
                description: The ID of the request.
                example: 9ca1d434-5ac7-4331-b8fb-3749c9a758d3
              data:
                type: array
                items:
                  $ref: '#/components/schemas/workflow'
                example:
                - id: b79c82b2-a51b-4c54-8469-28006a43551a
                  grant_id: 6c45fe5e-0bb6-41b9-9acc-ccb15bfc51eb
                  app_id: null
                  is_enabled: true
                  name: Booking Confirmation Workflow
                  trigger_event: booking.created
                  delay: 1
                  template_id: 14c00cc8-648c-4381-ad10-52641d9bac8e
                  date_created: 1756477389
                - id: c89d93c3-b62c-5d65-9570-39117b54662b
                  grant_id: 6c45fe5e-0bb6-41b9-9acc-ccb15bfc51eb
                  app_id: null
                  is_enabled: true
                  name: Booking Reminder Workflow
                  trigger_event: booking.reminder
                  delay: 60
                  template_id: 25d11dd9-759d-5492-be21-63752e6cbd9f
                  date_created: 1756477500
                - id: d90e04d4-c73d-6e76-a681-40228c65773c
                  grant_id: 6c45fe5e-0bb6-41b9-9acc-ccb15bfc51eb
                  app_id: null
                  is_enabled: false
                  name: Booking Cancellation Workflow
                  trigger_event: booking.cancelled
                  delay: 0
                  template_id: 36e22ee0-86ae-6603-cf32-74863f7dce0g
                  date_created: 1756477600
              next_cursor:
                type: string
                description: A cursor pointing to the next page of results for the request.
                example: eyJjdXJzb3IiOiJub3RpZmljYXRpb25fd29ya2Zsb3dfYjc5YzgyYjIifQ==
    workflow:
      description: Success. Returns workflow.
      content:
        application/json:
          schema:
            type: object
            required:
            - data
            - request_id
            properties:
              request_id:
                type: string
                description: The ID of the request.
              data:
                $ref: '#/components/schemas/workflow'
          example:
            request_id: 9ca1d434-5ac7-4331-b8fb-3749c9a758d3
            data:
              app_id: null
              date_created: 1756477389
              delay: 5
              grant_id: 6c45fe5e-0bb6-41b9-9acc-ccb15bfc51eb
              id: b79c82b2-a51b-4c54-8469-28006a43551a
              is_enabled: true
              name: New booking confirmation workflow
              template_id: 14c00cc8-648c-4381-ad10-52641d9bac8e
              trigger_event: booking.created
              from:
                email: support@example.com
                name: Support
    workflow_404:
      description: 'Error: Not found'
      content:
        application/json:
          schema:
            type: object
            required:
            - error
            - request_id
            properties:
              request_id:
                type: string
                description: The ID of the request.
                example: 02674fc0-b8cf-43cd-8bd2-506fa401b81f
              error:
                type: object
                required:
                - message
                - type
                properties:
                  type:
                    type: string
                    description: The type of error that occurred.
                    example: api.not_found_error
                  message:
                    type: string
                    description: A human-readable message describing the error.
                    example: template not found
    '400':
      description: Bad Request
      content:
        application/json:
          schema:
            title: error
            type: object
            properties:
              request_id:
                type: string
                description: The request ID.
              error:
                type: object
                description: The response error object.
                properties:
                  type:
                    type: string
                    description: The error type.
                  message:
                    type: string
                    description: The error message.
                  provider_error:
                    type: object
                    description: The error from the provider.
          examples:
            Bad Request:
              value:
                request_id: 5fa64c92-e840-4357-86b9-2aa364d35b88
                error:
                  type: invalid_request_error
                  message: error parsing request body
                  provider_error:
                    code: TargetIdShouldNotBeMeOrWhitespace
                    message: Id is malformed.
            Invalid Idempotency-Key:
              value:
                request_id: 5fa64c92-e840-4357-86b9-2aa364d35b88
                error:
                  type: api.invalid_idempotency_key
                  message: Idempotency-Key must be 256 characters or fewer.
  parameters:
    page_token:
      name: page_token
      in: query
      required: false
      schema:
        type: string
      description: 'An identifier that specifies which page of data to return. You can get this value from the

        `next_cursor` response field. See [Pagination](/docs/reference/api/#pagination) for more

        information.'
    limit:
      name: limit
      in: query
      required: false
      schema:
        type: integer
        default: 50
        maximum: 200
      description: 'The maximum number of objects to return. See [Pagination](/docs/reference/api/#pagination)

        for more information.'
  schemas:
    workflow:
      type: object
      description: A custom workflow that sends messages from a template when certain events are triggered.
      required:
      - date_created
      - delay
      - id
      - is_enabled
      - name
      - template_id
      - trigger_event
      properties:
        app_id:
          type:
          - string
          - 'null'
          description: 'The ID of the Nylas application associated with the workflow. Returned only if the

            workflow is configured at the application level.'
          example: 6c45fe5e-0bb6-41b9-9acc-ccb15bfc51eb
        date_created:
          type: integer
          description: When the workflow was created, in seconds using the Unix timestamp format.
          example: 1756477389
        delay:
          type: integer
          description: 'The number of minutes between a `trigger_event` being met and the workflow sending

            a message.'
          example: 5
        grant_id:
          type:
          - string
          - 'null'
          description: 'The ID of the grant associated with the workflow. Returned only if the workflow is

            configured at the grant level.'
          example: 6c45fe5e-0bb6-41b9-9acc-ccb15bfc51eb
        id:
          type: string
          description: The ID of the workflow.
          example: b79c82b2-a51b-4c54-8469-28006a43551a
        is_enabled:
          type: boolean
          description: When `true`, indicates that the workflow is enabled.
          example: true
        name:
          type: string
          description: The name of the workflow.
          example: New booking confirmation workflow
        template_id:
          type: string
          description: The ID of the email template the workflow uses.
          example: 14c00cc8-648c-4381-ad10-52641d9bac8e
        trigger_event:
          type: string
          enum:
          - booking.cancelled
          - booking.created
          - booking.pending
          - booking.reminder
          - booking.rescheduled
          description: The event which triggers the workflow.
          example: booking.created
        from:
          type:
          - object
          - 'null'
          description: Details of the sender if the workflow uses transactional send.
          properties:
            email:
              type: string
              description: The email address of the sender.
              example: support@example.com
            name:
              type: string
              description: The name of the sender.
              example: Support
  requestBodies:
    workflow_update:
      description: Update workflow request
      required: true
      content:
        application/json:
          schema:
            type: object
            properties:
              delay:
                type: integer
                description: 'The number of minutes between a `trigger_event` being met and the workflow

                  sending a message.'
                example: 1
              is_enabled:
                type: boolean
                description: When `true`, indicates that the workflow is enabled.
                example: false
              name:
                type: string
                description: The name of the workflow.
                example: Updated booking confirmation workflow
              template_id:
                type: string
                description: The ID of the email template the workflow uses.
                example: 14c00cc8-648c-4381-ad10-52641d9bac8e
              trigger_event:
                type: string
                enum:
                - booking.cancelled
                - booking.created
                - booking.pending
                - booking.reminder
                - booking.rescheduled
                description: The event which triggers the workflow.
                example: booking.created
              from:
                type:
                - object
                - 'null'
                description: 'Details of the sender if the workflow should use [transactional send](/docs/reference/api/transactional-send/).

                  If not provided, the sender will be the grant associated with the trigger event.'
                properties:
                  email:
                    type: string
                    description: The email address of the sender.
                    example: support@example.com
                  name:
                    type: string
                    description: The name of the sender.
                    example: Support
    workflow_create:
      description: Create workflow request
      required: true
      content:
        application/json:
          schema:
            type: object
            required:
            - name
            - template_id
            - trigger_event
            properties:
              delay:
                type: integer
                description: 'The number of minutes between a `trigger_event` being met and the workflow

                  sending a message.'
                default: 0
                example: 5
              is_enabled:
                type: boolean
                description: When `true`, indicates that the workflow is enabled.
                default: true
                example: true
              name:
                type: string
                description: The name of the workflow.
                example: New booking confirmation workflow
              template_id:
                type: string
                description: The ID of the email template the workflow uses.
                example: 14c00cc8-648c-4381-ad10-52641d9bac8e
              trigger_event:
                type: string
                enum:
                - booking.cancelled
                - booking.created
                - booking.pending
                - booking.reminder
                - booking.rescheduled
                description: The event which triggers the workflow.
                example: booking.created
              from:
                type:
                - object
                - 'null'
                description: 'Details of the sender if the workflow should use [transactional send](/docs/reference/api/transactional-send/).

                  If not provided, the sender will be the grant associated with the trigger event.'
                properties:
                  email:
                    type: string
                    description: The email address of the sender.
                    example: support@example.com
                  name:
                    type: string
                    description: The name of the sender.
                    example: Support
  securitySchemes:
    ACCESS_TOKEN:
      scheme: bearer
      type: http
      bearerFormat: NYLAS_ACCESS_TOKEN
      description: 'The Nylas **access token** for a specific grant. Issued as part of OAuth 2.1 flow token

        exchange.'
    NYLAS_API_KEY:
      scheme: bearer
      type: http
      bearerFormat: NYLAS_API_KEY
      description: 'The Nylas **API key** provides application-level access to APIs and all grants. You can

        generate these from the Dashboard. Learn more about [authorizing requests](/docs/v3/auth/).'
    SCHEDULER_SESSION_TOKEN:
      scheme: bearer
      type: http
      bearerFormat: Session ID
      description: The Nylas Scheduler **session ID** that Scheduler UI Components use to authorize API requests.