> ## Documentation Index > Fetch the complete documentation index at: https://docs.lambdadb.ai/llms.txt > Use this file to discover all available pages before exploring further. # List collections > List all collections in an existing project. ## OpenAPI ````yaml get /collections openapi: 3.1.1 info: title: LambdaDB API summary: LambdaDB Open API Spec version: 1.1.1 servers: - url: https://{projectHost} description: LambdaDB API endpoints variables: projectHost: description: The project-scoped URL of the API default: api.lambdadb.ai/projects/example-project security: [] tags: - name: collections - name: collections.docs paths: /collections: get: tags: - collections description: List all collections in an existing project. operationId: listCollections parameters: - in: query name: size description: Max number of collections to return at once. schema: type: integer minimum: 1 maximum: 100 - in: query name: pageToken description: Next page token. schema: type: string responses: '200': description: A list of collections matched with a projectName. content: application/json: schema: type: object properties: collections: type: array items: $ref: '#/components/schemas/CollectionResponse' nextPageToken: type: string description: Next page token. required: - collections examples: normalCollection: summary: Example response for a list of normal collections value: collections: - projectName: example-project-name collectionName: example-collection-name indexConfigs: example-field1: type: text analyzers: - standard example-field2: type: vector dimensions: 128 similarity: cosine numDocs: 10000 collectionStatus: ACTIVE forkedCollection: summary: Example response for a list of forked collections value: collections: - projectName: example-project-name collectionName: example-collection-name indexConfigs: example-field1: type: text analyzers: - standard example-field2: type: vector dimensions: 128 similarity: cosine numDocs: 10000 sourceProjectName: example-source-project-name sourceCollectionName: example-source-collection-name sourceCollectionVersionId: example-source-collection-version-id collectionStatus: ACTIVE '401': description: Unauthenticated content: application/json: schema: $ref: '#/components/schemas/Unauthenticated' examples: example: summary: Example response for authentication failure value: message: Authentication failed '404': description: Resource not found content: application/json: schema: $ref: '#/components/schemas/ResourceNotFound' examples: example: summary: Example response for resource not found value: message: Resource not found '429': description: Too many requests content: application/json: schema: $ref: '#/components/schemas/TooManyRequests' examples: example: summary: Example response for too many requests value: message: Too many requests '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/InternalServerError' examples: example: summary: Example response for internal server error value: message: Internal server error security: - ProjectApiKey: [] components: schemas: CollectionResponse: title: CollectionResponse type: object properties: projectName: type: string description: Project name. collectionName: type: string description: Collection name. indexConfigs: $ref: '#/components/schemas/IndexConfigs' partitionConfig: $ref: '#/components/schemas/PartitionConfig' numPartitions: type: integer description: Total number of partitions including the default partition. numDocs: type: integer description: Total number of documents. sourceProjectName: type: string description: Source project name. sourceCollectionName: type: string description: Source collection name. sourceCollectionVersionId: type: string description: Source collection version. collectionStatus: $ref: '#/components/schemas/Status' createdAt: type: integer description: Collection creation time in seconds since the Unix epoch. updatedAt: type: integer description: Collection last update time in seconds since the Unix epoch. dataUpdatedAt: type: integer description: Collection data last update time in seconds since the Unix epoch. required: - projectName - collectionName - indexConfigs - numDocs - collectionStatus - numPartitions - createdAt - updatedAt - dataUpdatedAt Unauthenticated: title: Unauthenticated type: object properties: message: type: string ResourceNotFound: title: ResourceNotFound type: object properties: message: type: string TooManyRequests: title: TooManyRequests type: object properties: message: type: string InternalServerError: title: InternalServerError type: object properties: message: type: string IndexConfigs: title: IndexConfigs type: object additionalProperties: type: object oneOf: - properties: type: type: string enum: - text analyzers: type: array description: Analyzers. items: type: string enum: - standard - korean - japanese - english default: standard additionalProperties: false required: - type - properties: type: type: string enum: - vector managedEmbedding: type: boolean description: Set to false or omit for unmanaged vector fields. enum: - false dimensions: type: integer description: Vector dimensions for unmanaged vector fields. similarity: type: string description: Vector similarity metric for unmanaged vector fields. enum: - cosine - euclidean - dot_product - max_inner_product default: cosine additionalProperties: false required: - type - dimensions - properties: type: type: string enum: - vector managedEmbedding: type: boolean description: Managed embedding vector field. enum: - true embedding: $ref: '#/components/schemas/EmbeddingConfig' additionalProperties: false required: - type - managedEmbedding - embedding - properties: type: type: string enum: - keyword - long - double - datetime - boolean - sparseVector description: Types that do not need additional parameters. additionalProperties: false required: - type - properties: type: type: string enum: - object objectIndexConfigs: type: object additionalProperties: true additionalProperties: false required: - type - objectIndexConfigs PartitionConfig: title: PartitionConfig type: object properties: fieldName: type: string description: Partition field name. dataType: type: string description: Partition field data type. enum: - keyword numPartitions: type: integer description: The number of partitions. minimum: 2 maximum: 1024 Status: title: Status type: string description: Status enum: - CREATING - ACTIVE - DELETING EmbeddingConfig: title: EmbeddingConfig type: object description: Managed embedding configuration for vector fields. properties: provider: type: string description: Embedding provider. enum: - openai model: type: string description: >- Embedding model name. See /guides/collections/managed-embeddings for the current supported providers and models. sourceField: type: string description: Source text field name used to generate embeddings. dimensions: type: integer description: >- Resolved embedding dimensions. Optional in requests and resolved in stored collection metadata. similarity: type: string description: >- Resolved vector similarity metric. Optional in requests and resolved in stored collection metadata. enum: - cosine - euclidean - dot_product - max_inner_product default: cosine required: - provider - model - sourceField securitySchemes: ProjectApiKey: type: apiKey in: header name: x-api-key description: Project API Key. x-speakeasy-example: ````