Create, retrieve, update, and delete individual data items within a collection. A data item is a single record conforming to the collection's schema.
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openapi: 3.2.0
info:
title: Lucid Data Data Item API
version: '1.0'
description: The Lucid Data API enables external applications to create, read, update, and delete structured data linked to Lucid documents. Use it to sync data sets, collections, and schemas between your data sources and Lucid diagrams. Authenticate via OAuth 2.0.
contact:
name: Lucid Developer Platform
url: https://developer.lucid.co/
x-documentation: https://developer.lucid.co/reference/data-api
servers:
- url: https://data.lucid.app
tags:
- name: Data Item
description: Create, retrieve, update, and delete individual data items within a collection. A data item is a single record conforming to the collection's schema.
paths:
/collections/{collectionId}/items:
head:
summary: Get Total Data Items Count
description: This endpoint returns the number of data items a user has access to. The return value is in the response headers as Lucid-Items-Total
operationId: getTotalDataItemsCount
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to get total data items count for
required: true
schema:
type: integer
responses:
'200':
description: OK
headers:
Lucid-Items-Total:
description: Total number of data items in the collection
schema:
type: integer
example: 17
get:
summary: Get All Data Items
description: 'This endpoint returns all data items within a collection that the user has access to. The results will be paginated. If the number of data items exceeds the pagination limit, links will be provided to get the next set of results or the previous set of results (if applicable). The range of returned values can be determined by optional start and end parameters. If the difference between the end and start values is greater than the pagination limit, the endpoint returns collections in the range from start to start + pagination limit. Items in the response are determined based on their creation order.
This endpoint also supports an optional filter string that can be used to filter down the data items returned based off the items'' fields'' values. If a filter is included, the start and end parameters only refer to items which satisfy the filter; this is also true of the total value in the response. For more details, see Data Item Filters.'
operationId: getAllDataItems
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to get data items from
required: true
schema:
type: integer
- name: start
in: query
description: Starting 1-based index of the data items to return. Defaults to 1.
required: false
schema:
type: integer
example: 1
- name: end
in: query
description: Ending 1-based index of the data items to return. Defaults to 10000.
required: false
schema:
type: integer
example: 100
- name: filter
in: query
description: URL encoded filter string. Example unencoded is `filter=age > 16`
required: false
schema:
type: string
example: filter=age%20%3E%2016
responses:
'200':
description: OK with paginated list of Data Items
content:
application/json:
schema:
type: object
properties:
items:
type: array
description: List of data items
items:
type: object
properties:
uri:
type: string
description: Link to self
example: https://data.lucid.app/collections/2/items/4
collection:
type: string
description: Link to the collection the item belongs to
example: https://data.lucid.app/collections/2
fields:
type: object
description: Mapping of field names found in schema to this specific item's values
example:
Co1B: value1
Co2B: value2
required:
- uri
- collection
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
collection: https://data.lucid.app/collections/2
fields:
Co1B: value1
Co2B: value2
total:
type: integer
description: Total number of data items in the collection
example: 175
prev:
type: string
description: Link to get the previous set of data items
example: https://data.lucid.app/collections/2/items?start=1&end=100
next:
type: string
description: Link to get the next set of data items
example: https://data.lucid.app/collections/2/items?start=201&end=300
post:
summary: Create Data Items
description: If the user has access to the collection, new data items are created using the supplied values. Primary key constraints are not enforced. Any field name that is not part of the schema definition is ignored by default. The schema should be created prior to any data items being created.
operationId: createDataItems
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to create data items for
required: true
schema:
type: integer
requestBody:
required: true
content:
application/json:
schema:
type: array
description: Field value pairs to create data items from. Each mapping is for a single data item
items:
type: object
additionalProperties:
type: string
example:
Co1B: value1
Co2B: value2
responses:
'200':
description: OK with Array[Data Item] containing the newly created data items
content:
application/json:
schema:
type: array
items:
type: object
properties:
uri:
type: string
description: Link to self
example: https://data.lucid.app/collections/2/items/4
collection:
type: string
description: Link to the collection the item belongs to
example: https://data.lucid.app/collections/2
fields:
type: object
description: Mapping of field names found in schema to this specific item's values
example:
Co1B: value1
Co2B: value2
required:
- uri
- collection
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
collection: https://data.lucid.app/collections/2
fields:
Co1B: value1
Co2B: value2
patch:
summary: Update Data Items
description: This endpoint allows updating multiple data items at once. The easiest way to accomplish is to modify the values in the response from Get All Data Items and send a PATCH request. Changing the values will update existing data item values. The collection field is ignored as the data item cannot be moved to a different collection. It the new value is null, it means the value is deleted. If the provided field name does not exist in the collection schema, that value is ignored.
operationId: updateDataItems
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to update data items for
required: true
schema:
type: integer
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
uri:
type: string
description: URI of data item to be updated
example: https://data.lucid.app/collections/2/items/4
fields:
type: object
description: Field value pairs to update data items from. Mapping is for a single data item
example:
Co1B: new column 1b value
Co2B: new column 2b value
required:
- uri
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
fields:
Co1B: new column 1b value
Co2B: new column 2b value
responses:
'200':
description: OK with Array[Data Item] containing the updated data items
content:
application/json:
schema:
type: array
items:
type: object
properties:
uri:
type: string
description: Link to self
example: https://data.lucid.app/collections/2/items/4
collection:
type: string
description: Link to the collection the item belongs to
example: https://data.lucid.app/collections/2
fields:
type: object
description: Mapping of field names found in schema to this specific item's values
example:
Co1B: value1
Co2B: value2
required:
- uri
- collection
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
collection: https://data.lucid.app/collections/2
fields:
Co1B: value1
Co2B: value2
delete:
summary: Delete Data Items
description: Removes only the data items provided in the query parameter. The data items in the query parameter must belong to the collection specified. The deletion cannot be undone. The deletion will only occur if the user has access to the data source.
operationId: deleteDataItems
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to delete data items from
required: true
schema:
type: integer
- name: items
in: query
description: List of data item URI's to remove from specified collection
required: true
schema:
type: array
items:
type: string
responses:
'200':
description: OK
/collections/{collectionId}/items/{dataItemId}:
get:
summary: Get Data Item
description: Gets a specific existing data item from a given collection
operationId: getDataItem
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to get data item from
required: true
schema:
type: integer
- name: dataItemId
in: path
description: ID of data item to get
required: true
schema:
type: integer
responses:
'200':
description: OK with Data Item
content:
application/json:
schema:
type: object
properties:
uri:
type: string
description: Link to self
example: https://data.lucid.app/collections/2/items/4
collection:
type: string
description: Link to the collection the item belongs to
example: https://data.lucid.app/collections/2
fields:
type: object
description: Mapping of field names found in schema to this specific item's values
example:
Co1B: value1
Co2B: value2
required:
- uri
- collection
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
collection: https://data.lucid.app/collections/2
fields:
Co1B: value1
Co2B: value2
post:
summary: Get Data Items By Key
description: 'Returns all data items in the specified collection whose field values match the values specified in a Data Item By Key Find JSON Object. If necessary, you can paginate this endpoint''s results using query parameters.
Note: For more complex data item search queries, consider using the filter parameter with Get All Data Items.'
operationId: getDataItemsByKey
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to get data items from
required: true
schema:
type: integer
- name: dataItemId
in: path
description: ID of data item to get
required: true
schema:
type: integer
- name: start
in: query
description: Starting 1-based index of the data items to return. Defaults to 1.
required: false
schema:
type: integer
example: 1
- name: end
in: query
description: Ending 1-based index of the data items to return. Defaults to 10000.
required: false
schema:
type: integer
example: 100
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
targetValues:
type: array
description: List of parameters by which to search for data items
items:
type: object
properties:
fieldValues:
type: array
description: Specifies the actual value that the fields need to have to be found
items:
type: string
example: Ontario
keySchemaFields:
type: array
description: Fields used to search for items in the collection. If it is not provided, primary keys from the schema are used.
items:
type: string
example: Province
required:
- targetValues
example:
targetValues:
- fieldValues:
- Ontario
keySchemaFields:
- Province
responses:
'200':
description: OK with paginated list of Data Items
content:
application/json:
schema:
type: object
properties:
items:
type: array
description: List of data items
items:
type: object
properties:
uri:
type: string
description: Link to self
example: https://data.lucid.app/collections/2/items/4
collection:
type: string
description: Link to the collection the item belongs to
example: https://data.lucid.app/collections/2
fields:
type: object
description: Mapping of field names found in schema to this specific item's values
example:
Co1B: value1
Co2B: value2
required:
- uri
- collection
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
collection: https://data.lucid.app/collections/2
fields:
Co1B: value1
Co2B: value2
total:
type: integer
description: Total number of data items in the collection
example: 175
prev:
type: string
description: Link to get the previous set of data items
example: https://data.lucid.app/collections/2/items?start=1&end=100
next:
type: string
description: Link to get the next set of data items
example: https://data.lucid.app/collections/2/items?start=201&end=300
patch:
summary: Update Data Item
description: Update values for the specified item. The easiest way to accomplish is to modify the values in the response from Get Data Item and send a PATCH request. Changing the values will update existing data item values. The collection field is ignored as the data item cannot be moved to a different collection. It the new value is null, it means the value is deleted. If the provided field name does not exist in the collection schema, that value is ignored.
operationId: updateDataItem
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to update data item for
required: true
schema:
type: integer
- name: dataItemId
in: path
description: ID of data item to update
required: true
schema:
type: integer
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
uri:
type: string
description: URI of data item to be updated
example: https://data.lucid.app/collections/2/items/4
fields:
type: object
description: Field value pairs to update data items from. Mapping is for a single data item
example:
Co1B: new column 1b value
Co2B: new column 2b value
required:
- uri
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
fields:
Co1B: new column 1b value
Co2B: new column 2b value
responses:
'200':
description: OK with Data Item
content:
application/json:
schema:
type: object
properties:
uri:
type: string
description: Link to self
example: https://data.lucid.app/collections/2/items/4
collection:
type: string
description: Link to the collection the item belongs to
example: https://data.lucid.app/collections/2
fields:
type: object
description: Mapping of field names found in schema to this specific item's values
example:
Co1B: value1
Co2B: value2
required:
- uri
- collection
- fields
example:
uri: https://data.lucid.app/collections/2/items/4
collection: https://data.lucid.app/collections/2
fields:
Co1B: value1
Co2B: value2
delete:
summary: Delete Data Item
description: Removes the specified data item from the collection. This deletion cannot be undone. The deletion will only occur if the user has access to the data source.
operationId: deleteDataItem
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to delete data item from
required: true
schema:
type: integer
- name: dataItemId
in: path
description: ID of data item to delete
required: true
schema:
type: integer
responses:
'200':
description: OK
/collections/{collectionId}/itemsByKey:
patch:
summary: Update Data Items By Key
description: Find any data items whose fields match specified values and update those items using a patch. If the value of a field in a patch is null, that value will be deleted from the item. If the provided field name does not exist in the collection schema, that value is ignored. Attempts to update the Collection field will be ignored as a data item cannot be moved to a different collection.
operationId: updateDataItemsByKey
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to update data items for
required: true
schema:
type: integer
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
patches:
type: array
description: Define what items from the collection you are changing and how to change them. The order of strings in fieldValues must match that of either keySchemaFields or of the actual primary keys from the real schema if keySchemaFields is not defined.
items:
type: object
properties:
fieldValues:
type: array
description: Specifies the actual value that the fields need to have to be found
items:
type: string
example: Ontario
patch:
type: object
description: List of field names with the new value that the field should be set to. Changes will be applied to any matching items and if the value is null, that field will be deleted from the matching data items.
example:
Co1B: new column 1b value
Co2B: new column 2b value
keySchemaFields:
type: array
description: Fields used to search for items in the collection. If it is not provided, primary keys from the schema are used.
items:
type: string
example: Province
required:
- patches
example:
patches:
- fieldValues:
- Ontario
patch:
Co1B: new column 1b value
Co2B: new column 2b value
keySchemaFields:
- Province
responses:
'200':
description: OK with message indicating the number of items updated.
content:
application/json:
schema:
type: object
properties:
message:
type: string
description: Message indicating the number of items updated
example: Updated 5 item(s)
delete:
summary: Delete Data Items By Key
description: Finds all the items whose key values match those specified by the payload and deletes them. The deletion cannot be undone. The deletion will only occur if the user has access to the data source.
operationId: deleteDataItemsByKey
tags:
- Data Item
security:
- OAuth2:
- data-service.admin
parameters:
- name: collectionId
in: path
description: ID of collection to delete data items from
required: true
schema:
type: integer
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
targetValues:
type: array
description: Defines what items within the collection you are searching for. The order of strings in fieldValues must match that of either keySchemaFields or of the actual primary keys from the real schema if keySchemaFields is not defined.
items:
type: object
properties:
fieldValues:
type: array
description: Specifies the actual value that the fields need to have to be found
items:
type: string
example: Ontario
keySchemaFields:
type: array
description: Fields used to search for items in the collection. If it is not provided, primary keys from the schema are used.
items:
type: string
example: Province
required:
- targetValues
example:
targetValues:
- fieldValues:
- Joey
- Ontario
keySchemaFields:
- first name
- last name
responses:
'200':
description: OK
components:
securitySchemes:
OAuth2:
type: oauth2
flows:
authorizationCode:
authorizationUrl: https://lucid.app/oauth2/authorize
tokenUrl: https://api.lucid.co/oauth2/token
refreshUrl: https://api.lucid.co/oauth2/token
scopes:
data-service.admin: Scope needed for access to the Data APIs.
x-harvest:
harvested: '2026-08-01'
method: searched
source: https://lucid-developer-docs.readme.io/mcp
note: 'Assembled operation-by-operation from Lucid''s own documentation MCP server (tools list-endpoints + get-endpoint), which returns verbatim OpenAPI 3.0.3 fragments out of the spec Lucid uploaded to its ReadMe hub (/branches/1.4/apis/lucid-data-api.json). Paths, operations, parameters, request bodies, responses, components and securitySchemes are provider content, unmodified. Only the info block is ours: ReadMe''s per-endpoint fragments omit info, so title/description are copied verbatim from the provider''s own list-specs description for this spec.'
x-provenance:
method: harvested
publisher: Lucid
source: https://lucid.readme.io/openapi/lucid-data-api.json
note: split by refine-openapis from the provider's own published document, verified by fetch (openapi/_original/*.fetch.json);
stamped by stamp-openapi-provenance.py (roadmap#793)