> ## Documentation Index > Fetch the complete documentation index at: https://docs.canary.effectiveai.app/llms.txt > Use this file to discover all available pages before exploring further. # List the conversation > List the messages and replies in a session, oldest first. Only text is returned; tool calls are left out. Pass nextCursor with the same limit for the next page; it continues after the last entry returned, so messages added later appear on later pages. If that entry was deleted in the web app, the cursor returns invalid_cursor: start again. ## OpenAPI ````yaml /openapi.json get /sessions/{id}/messages openapi: 3.0.3 info: title: Effective API version: 2.0.0 description: The public Effective REST API. Authenticate using an Effective API key. servers: - url: https://api.canary.effectiveai.app/api/v2 description: Canary security: - bearerAuth: [] paths: /sessions/{id}/messages: get: tags: - Sessions summary: List the conversation description: >- List the messages and replies in a session, oldest first. Only text is returned; tool calls are left out. Pass nextCursor with the same limit for the next page; it continues after the last entry returned, so messages added later appear on later pages. If that entry was deleted in the web app, the cursor returns invalid_cursor: start again. operationId: listSessionMessages parameters: - schema: type: string format: uuid description: Session UUID, e.g. 00000000-0000-4000-8000-000000000001. example: 00000000-0000-4000-8000-000000000001 required: true description: Session UUID, e.g. 00000000-0000-4000-8000-000000000001. name: id in: path - schema: type: integer minimum: 1 maximum: 200 default: 50 description: Maximum number of items to return (1-200). required: false description: Maximum number of items to return (1-200). name: limit in: query - schema: type: string minLength: 1 maxLength: 8192 description: >- Opaque nextCursor from this operation. Repeat every other query parameter unchanged; a cursor from a different query returns invalid_cursor. required: false description: >- Opaque nextCursor from this operation. Repeat every other query parameter unchanged; a cursor from a different query returns invalid_cursor. name: cursor in: query responses: '200': description: Conversation page. content: application/json: schema: $ref: '#/components/schemas/V2SessionConversation' '400': description: invalid_request or invalid_cursor. content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '401': description: 'unauthenticated: valid credentials are required.' content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '403': description: 'forbidden: the credential does not permit this operation.' content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '404': description: 'not_found: the session does not exist or is not visible to you.' content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '500': description: 'internal_error: unexpected server error.' content: application/json: schema: $ref: '#/components/schemas/V2CodedError' '503': description: 'temporarily_unavailable: retry later.' content: application/json: schema: $ref: '#/components/schemas/V2CodedError' security: - bearerAuth: [] components: schemas: V2SessionConversation: type: object properties: messages: type: array items: $ref: '#/components/schemas/V2SessionConversationEntry' nextCursor: type: string nullable: true description: Cursor for the next page, or null on the last page. required: - messages - nextCursor additionalProperties: false V2CodedError: allOf: - $ref: '#/components/schemas/V2Error' - type: object properties: code: type: string minLength: 1 description: Stable error code. Clients must tolerate unknown future codes. details: type: array items: type: object properties: location: type: string enum: - path - query - header - body path: type: array items: type: string maxLength: 64 maxItems: 12 code: type: string enum: - required - invalid_type - invalid_value - unknown_field message: type: string minLength: 1 maxLength: 200 required: - location - path - code - message minItems: 1 maxItems: 20 description: Bounded safe validation issues; may omit some invalid fields. requestId: type: string minLength: 1 maxLength: 128 description: >- Existing server correlation for this HTTP attempt, when available. dataset: type: string enum: - naic - osha description: Dataset needed for dataset_not_enabled. businessCode: type: string description: The rater’s own refusal code, for business_rejection. violations: type: array items: type: object properties: code: type: string description: Authored or built-in constraint code message: type: string description: Authored message for the failed constraint path: type: string description: Input path of the offending value; empty for the request value: nullable: true description: Offending input value, size-bounded by the runtime constraint: type: string description: The constraint the value failed, as text cite: type: string nullable: true description: >- Filing citation of the constraint, when the source cites one required: - code - message - path - value - constraint - cite additionalProperties: false maxItems: 256 description: >- Each input constraint the submission failed, for invalid_inputs and business_rejection. violationsTruncated: type: boolean description: >- True when the rater reported more violations than violations holds. accessUrl: type: string nullable: true format: uri description: >- Where to add the product to your account, for product_access_required. required: - code V2SessionConversationEntry: type: object properties: id: type: string minLength: 1 maxLength: 200 description: >- Message ID returned when the message was sent, or listed in the conversation. example: 00000000-0000-4000-8000-000000000002 role: type: string enum: - user - assistant description: user for messages sent to the agent; assistant for its replies. text: type: string description: The message text. Tool calls and their results are left out. createdAt: type: string format: date-time description: When the message was written, in UTC. required: - id - role - text - createdAt additionalProperties: false V2Error: type: object properties: error: type: string minLength: 1 description: Human-readable explanation of the failure. required: - error securitySchemes: bearerAuth: type: http scheme: bearer description: 'Effective API key. Send Authorization: Bearer sk-eai-...' ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.