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LegalOn API (1.3.1)

API documentation for LegalOn services

Languages
Servers
The server URL is `{api_base_url}/rest/v1`. You can construct the server URL using the value of `api_base_url` provided in the response when obtaining an access token.
https://{api_base_url_without_scheme}/rest/v1

Users

Operations about user

Operations

User Groups

Operations about user group

Operations

Workspaces

Operations about all tenant workspaces/folders regardless of the user's access permissions.

Operations

Departments

Operations about department

Operations

Contracts(Files)

Operations to create, retrieve, update, and delete contracts. For operations that target a workspace, specify a workspace_id obtained via the common Workspaces endpoint (GET /workspaces).

Operations

Update contract management attributes

Request

Updates only the supplied management attributes. Omitted attributes remain unchanged. An empty string or array clears the corresponding attribute.

Security
OAuth2ClientCredentials
Path
document_idstring(uuid)required

Contract document ID

Bodyapplication/jsonrequired
non-empty
management_numberstring<= 50 characters

Contract management number. An empty string clears the value.

voucher_idsArray of strings<= 10 items

Voucher numbers. An empty array clears the values.

contract_assigneesArray of objects<= 50 items

Contract assignees. An empty array clears the assignees.

curl -i -X PATCH \
  'https://{api_base_url_without_scheme}/rest/v1/contracts/{document_id}/management-attributes' \
  -H 'Authorization: Bearer <YOUR_TOKEN_HERE>' \
  -H 'Content-Type: application/json' \
  -d '{
    "management_number": "CN-2026-001",
    "voucher_ids": [
      "V-001",
      "V-002"
    ],
    "contract_assignees": [
      {
        "id": "00000000-0000-0000-0000-000000000001",
        "assignee_type": "user"
      }
    ]
  }'

Responses

Updated

Response
No content

Get contract information

Request

Retrieves information about the specified contract.

Security
OAuth2ClientCredentials
Path
document_idstring(uuid)required

Contract document ID

Query
document_version_idstring(uuid)

Specific version to retrieve. If omitted, the latest version is returned.

curl -i -X GET \
  'https://{api_base_url_without_scheme}/rest/v1/contracts/{document_id}?document_version_id=497f6eca-6276-4993-bfeb-53cbbbba6f08' \
  -H 'Authorization: Bearer <YOUR_TOKEN_HERE>'

Responses

OK

Bodyapplication/json
document_idstring(uuid)required

Contract document ID

document_version_idstring(uuid)required

Contract document version ID

file_namestring[ 1 .. 255 ] charactersrequired

Contract file name

mime_typestring[ 1 .. 255 ] charactersrequired

Contract file MIME type

workspace_idsArray of strings(uuid)required

Workspaces that contain this contract document.

created_atstring(date-time)required

Contract document creation timestamp.

updated_atstring(date-time)required

Contract document latest update timestamp.

document_processing_statusstring(document_processing_status)required

Document processing status

Enum"PROCESSING""READY""REJECTED""FAILED""SKIPPED"
preview_statusstring(preview_status)required

Preview availability status

Enum"PROCESSING""READY""NOT_AVAILABLE""FAILED"
metadata_extraction_statusesobject(metadata_extraction_statuses)required

Item-level metadata extraction statuses. Omitted fields are not available from the current internal source.

metadata_extraction_statuses.​title_statusstring(metadata_extraction_status)

Item-level metadata extraction status

Enum"WAITING""PROCESSING""COMPLETED""FAILED""UNAVAILABLE""SKIPPED"
metadata_extraction_statuses.​language_code_statusstring(metadata_extraction_status)

Item-level metadata extraction status

Enum"WAITING""PROCESSING""COMPLETED""FAILED""UNAVAILABLE""SKIPPED"
metadata_extraction_statuses.​contract_category_positions_statusstring(metadata_extraction_status)

Item-level metadata extraction status

Enum"WAITING""PROCESSING""COMPLETED""FAILED""UNAVAILABLE""SKIPPED"
metadata_extraction_statuses.​own_party_statusstring(metadata_extraction_status)

Item-level metadata extraction status

Enum"WAITING""PROCESSING""COMPLETED""FAILED""UNAVAILABLE""SKIPPED"
metadata_extraction_statuses.​counter_party_statusstring(metadata_extraction_status)

Item-level metadata extraction status

Enum"WAITING""PROCESSING""COMPLETED""FAILED""UNAVAILABLE""SKIPPED"
metadataobject(contract_metadata)required

Contract metadata.

metadata.​titlestring[ 1 .. 1000 ] characters

Contract title

metadata.​language_codestring[ 2 .. 35 ] characters

Contract language code

metadata.​document_status_codestring(contract_document_status_code)

Contract document status code returned in contract metadata.

Enum"COUNTERPARTY_DRAFT""INTERNAL_DRAFT""COUNTERPARTY_REVISION""INTERNAL_REVISION""APPROVED_VERSION""READY_FOR_SIGNATURE""SIGNED"
metadata.​contract_category_positionsArray of objects(contract_category_position)

Contract category and position classifications.

metadata.​own_partiesArray of strings(party)

Own party names

metadata.​counter_partiesArray of strings(party)

Counter party names

related_filesArray of objects(related_file)required

Non-contract related files attached to the contract. Returns up to 30 files ordered by latest related file version creation timestamp in descending order.

related_files[].​related_file_idstring(uuid)required

Non-contract related file ID

related_files[].​file_namestring[ 1 .. 255 ] charactersrequired

Non-contract related file name

related_files[].​mime_typestring[ 1 .. 255 ] charactersrequired

Non-contract related file MIME type

previewArray of objects(preview)

Articles in the contract preview.

Response
application/json
{
  "document_id": "00000016-0000-0000-0001-100000000001",
  "document_version_id": "00000016-0000-0000-0001-100000000101",
  "file_name": "nda_2026_05_08.pdf",
  "mime_type": "application/pdf",
  "workspace_ids": [
    "00000023-0000-0000-0001-000000000020"
  ],
  "created_at": "2026-05-08T03:12:34Z",
  "updated_at": "2026-05-08T03:13:20Z",
  "document_processing_status": "PROCESSING",
  "preview_status": "READY",
  "metadata_extraction_statuses": {
    "title_status": "COMPLETED",
    "language_code_status": "COMPLETED",
    "contract_category_positions_status": "COMPLETED",
    "own_party_status": "PROCESSING",
    "counter_party_status": "PROCESSING"
  },
  "metadata": {
    "title": "Confidentiality Agreement",
    "language_code": "en",
    "contract_category_positions": [ … ],
    "own_parties": [ … ],
    "counter_parties": [ … ]
  },
  "related_files": [
    { … }
  ],
  "preview": [
    { … }
  ]
}

Delete a contract

Request

Deletes the specified contract. All versions and links to related files are also removed (the related files themselves are not deleted).

Security
OAuth2ClientCredentials
Path
document_idstring(uuid)required

Contract document ID

curl -i -X DELETE \
  'https://{api_base_url_without_scheme}/rest/v1/contracts/{document_id}' \
  -H 'Authorization: Bearer <YOUR_TOKEN_HERE>'

Responses

No Content

Response
No content

Matters

Operations to create, retrieve, update, and delete matters. Matter operations require an API credential owned by a user with a Matter Management Pro license.

Operations

Files

Operations to create and manage files for LegalOn resources.

Operations

Workspaces

Workspaces/folders are the common units used to store and organize resources such as contracts.

Operations