openapi: 3.2.0
info:
  title: Nylas Data migration 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: Data Migration
  description: In Nylas v2, you used the unique Nylas ID to locate data and objects in Nylas's synced data.
paths:
  /v3/migration-tools/translate:
    post:
      operationId: translate_v2id_to_provider_id
      tags:
      - Data Migration
      summary: Translate v2 Nylas ID into v3 Provider ID
      description: 'Use the connected account ID and a resource type, with an optional list of specific Nylas IDs, to get a response that contains a list of of Nylas IDs and their v3 Provider ID equivalents. Use this API as a one-time operation to translate v2 IDs into v3 Provider IDs. Do not use this API in your code logic as it very data intensive.


        To use this endpoint, your v2 Nylas application needs to be linked to the equivalent v3 Nylas application. This endpoint does not work for objects in v2 accounts that have the provider set to `Outlook`.


        By default, the API returns up to 3000 records for the requested resource type related to the v2 connected account, sorted by `created_at` date. If you specify a list of v2 Nylas IDs, the API returns the v3 Provider IDs for those specific IDs only.


        Results are paginated, with a page size of 3000 results. If the response includes a `next_page_number` field, you can use that number in a request to get the next set of results.


        Also, there is a possibility to search results created only after certain Unix timestamp, in Nylas v2 database. To use this, add to body payload `start_from_timestamp` valid Unix timestamp.


        The API is rate limited to 20 requests per second per Nylas application ID.


        ### IMAP folder resource ID


        When you make a Translate ID request for an IMAP folder (`resource_type: folders`), Nylas returns its name in the `v3_resource_id` field. To get the resource ID for a specific folder, Base64 encode the folder name using the following format: `v0::`.'
      security:
      - NYLAS_API_KEY: []
      requestBody:
        required: true
        description: ''
        content:
          application/json:
            schema:
              type: object
              required:
              - resource_type
              - v2_account_id
              properties:
                resource_type:
                  example: messages
                  type: string
                  description: The resourece(s) to get translations for.
                  enum:
                  - messages
                  - drafts
                  - threads
                  - contacts
                  - contactgroups
                  - events
                  - calendars
                  - folders
                v2_account_id:
                  example: 1kb392012l0mr39hmla2exnxu
                  type: string
                  description: The v2 connected account ID to get translations for.
                nylas_ids:
                  type: array
                  description: (Optional) The list of v2 IDs to translate. If omitted, Nylas returns up to 3000 IDs for the requested resource types related to that v2 connected account. Results are returned sorted by creation date, ascending.
                  items:
                    type: string
                  example:
                  - 4ro91k0t3ofvzs3b3lij6iqa2
                  - 5ro92l1t4pfwzt4c4mijk7jb3
                  - 6ro93m2u5qgxzu5d5nijl8kc4
                start_from_timestamp:
                  example: 1727172308
                  type: integer
                  description: (Optional) The Unix timestamp to search for results created after that timestamp.
                next_page_number:
                  example: 2
                  type: integer
                  description: (Optional) The page number for the next set of results. This appears in the response only if there are more results available.
      responses:
        '200':
          content:
            application/json:
              schema:
                type: object
                properties:
                  request_id:
                    type: string
                    description: The request ID.
                    example: 5967ca40-a2d8-4ee0-a0e0-6f18ace39a90
                  data:
                    $ref: '#/components/schemas/translate_v2v3_id'
          description: Returns a JSON list of translated objects, with mapped v2 and translated v3 ids.
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/400'
        '401':
          description: Not Authenticated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/401'
      x-code-samples:
      - lang: bash
        label: cURL
        source: "curl --request POST \\\n  --url 'https://api.us.nylas.com/v3/migration-tools/translate' \\\n  --header 'Content-Type: application/json' \\\n  --header 'Authorization: Bearer <NYLAS_API_KEY>' \\\n  --data '{\n    \"resource_type\": \"messages\",\n    \"v2_account_id\": \"<NYLAS_ACCOUNT_ID>\",\n    \"nylas_ids\": [\n      \"<NYLAS_ACCOUNT_ID>\",\n      \"<NYLAS_ACCOUNT_ID>\"\n    ]\n  }'"
components:
  schemas:
    '400':
      type: object
      required:
      - request_id
      - error
      additionalProperties: false
      properties:
        request_id:
          description: ID of the request
          type: string
          example: 5967ca40-a2d8-4ee0-a0e0-6f18ace39a90
        error:
          description: Error object
          type: object
          properties:
            type:
              type: string
              description: Type of error
              example: bad_request
            message:
              description: Informative error message
              default: Bad request
              type: string
              example: Bad request
            provider_error:
              description: (OPTIONAL) informative error message from provider's side
              type: object
              example:
                error: invalid_grant
                provider_error: Bad Request
    '401':
      type: object
      required:
      - request_id
      - error
      additionalProperties: false
      properties:
        request_id:
          description: ID of the request
          type: string
          example: 5967ca40-a2d8-4ee0-a0e0-6f18ace39a90
        error:
          description: Error object
          type: object
          properties:
            type:
              type: string
              description: Type of error
              example: invalid_request_error
            message:
              description: Informative error message
              default: Authentication error
              type: string
              example: Authentication error
            provider_error:
              description: (OPTIONAL) informative error message from provider's side
              type: object
              example:
                error: invalid_grant
                provider_error: Bad Request
    translate_v2v3_id:
      type: object
      additionalProperties: false
      required:
      - v2_application_id
      - v2_account_id
      - resource_type
      - ids
      properties:
        v2_application_id:
          type: string
          description: The ID of the v2 Nylas application the connected account belongs to.
          example: defg12342l0mr39hmla2eabcd
        v2_account_id:
          type: string
          description: The ID of v2 connected account you are requesting translations for.
          example: 1kb392012l0mr39hmla2exnxu
        resource_type:
          type: string
          description: 'The names of the v2 resources you''re requesting translations for.


            To request Gmail''s "labels", include `folders`. (Nylas v3 consolidates folders and labels into

            one resource.)'
          example: message
          enum:
          - messages
          - drafts
          - threads
          - contacts
          - contactgroups
          - events
          - calendars
          - folders
        translations:
          type: array
          description: 'A list of v2 Nylas IDs and their v3 Provider ID counterparts, according to the requested resource

            type and v2 connected account.'
          items:
            type: object
            properties:
              v2_resource_id:
                type: string
                description: The v2 Nylas ID.
                example: 1kb392012l0mr39hmla2exnxu
              v3_resource_id:
                type: string
                description: The v3 Provider ID.
                example: 175ade7f22b0a2f4
        next_page_number:
          type: integer
          description: A page number for next set of results, if more results are available. This field does not appear if there are no more results.
          example: 2
  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.