> ## Documentation Index > Fetch the complete documentation index at: https://docs-classic.cognigy.com/llms.txt > Use this file to discover all available pages before exploring further. # Get the Latest Log Entries > Gets the latest 100 [log entries](https://docs.cognigy.com/ai/agents/test/logs) in a Project. Results are sorted descending by timestamp and `_id`. Supports cursor-based pagination via opaque base64url tokens returned in `nextCursor` and `previousCursor`. The `total` field is always `-1` because counting rows in this collection is intentionally skipped for performance reasons. If you provide an invalid `cursor` value, a 400 error will be returned. When the request header `x-cognigy-log-model-version` is set to `v2`, the response items use the V2 shape with a nested `metadata` object instead of a top-level `type` field. `lastTimeWindow` narrows or widens how far back the query reads and requires the `v2` model. Send the `x-cognigy-log-model-version` header set to `v2`, unless the service already has the v2 model enabled cluster-wide, in which case no header is needed. A 400 is returned only when the request would otherwise route to the v1 model. On the v2 timeseries model, `sessionId`, `userId`, and `flowName` are all matched exactly. ## OpenAPI ````yaml https://api-trial.cognigy.ai/logs/openapi/openapi-viewer.json get /v2.1/projects/{projectId}/logs/tail openapi: 3.0.0 info: title: Cognigy.AI REST-ful-API Reference version: 2026.23.0 description: > ### Introduction This is the [OpenAPI 3.0](https://swagger.io/specification/) documentation of the [REST](https://en.wikipedia.org/wiki/Representational_state_transfer)-ful Cognigy.AI API. ### Cross-Origin Resource Sharing This API features Cross-Origin Resource Sharing (CORS) implemented in compliance with [W3C spec](https://www.w3.org/TR/cors/), which allows cross-domain communication from the browser. All responses include a wildcard same-origin header, making the API fully accessible. ### Authentication Cognigy.AI offers four forms of authentication: - API Key - CXone Token - OAuth2 - BasicAuth An API Key is a security token. You can use API Keys in your path or HTTP header. Never expose your API Key and keep it safe and secure. Revoke the API Key if it got exposed or stolen. OAuth2 is an open protocol to allow secure authorization by web, mobile and desktop applications. For further information see [RFC 6749 - "The OAuth 2.0 Authorization Framework"](https://tools.ietf.org/html/rfc6749) and [RFC 6750 - "The OAuth 2.0 Authorization Framework: Bearer Token Usage"](https://tools.ietf.org/html/rfc6750). Basic Auth is only used for API calls regarding the Management-UI. ### Error Handling This API uses HTTP status codes equal or above 400 to indicate errors. Error details are generated in compliance with [RFC 7807 - "Problem Details for HTTP APIs"](https://tools.ietf.org/html/rfc7807). Every error response contains a traceId, which should be provided to the Cognigy.AI Technical Support when reporting an error. contact: name: Cognigy Technical Support url: https://www.cognigy.com email: support@cognigy.com servers: - url: https://api-trial.cognigy.ai/new/ description: Cognigy.AI API security: - APIKeyHeader: [] - APIKeyQueryParam: [] - CXoneTokenHeader: [] - OAuth2: [] - BasicAuth: [] tags: - name: Cognigy.AI REST-ful API description: The Cognigy.AI REST-ful API externalDocs: description: Cognigy.AI Documentation url: https://docs.cognigy.com/docs/ paths: /v2.1/projects/{projectId}/logs/tail: get: tags: - Logs v2.1 summary: Get the Latest Log Entries description: >- Gets the latest 100 [log entries](https://docs.cognigy.com/ai/agents/test/logs) in a Project. Results are sorted descending by timestamp and `_id`. Supports cursor-based pagination via opaque base64url tokens returned in `nextCursor` and `previousCursor`. The `total` field is always `-1` because counting rows in this collection is intentionally skipped for performance reasons. If you provide an invalid `cursor` value, a 400 error will be returned. When the request header `x-cognigy-log-model-version` is set to `v2`, the response items use the V2 shape with a nested `metadata` object instead of a top-level `type` field. `lastTimeWindow` narrows or widens how far back the query reads and requires the `v2` model. Send the `x-cognigy-log-model-version` header set to `v2`, unless the service already has the v2 model enabled cluster-wide, in which case no header is needed. A 400 is returned only when the request would otherwise route to the v1 model. On the v2 timeseries model, `sessionId`, `userId`, and `flowName` are all matched exactly. operationId: tailLogEntries_2_1 parameters: - in: path name: projectId description: The unique identifier for the Project. required: true schema: type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 - in: header name: Accept description: >- The `Accept` header specifies the media type that the client expects in the response. Available options: `application/json`, `application/hal+json`, `application/xml`, `text/xml`, `text/csv`. The default value is `application/json`. required: false schema: type: string enum: - application/json - application/hal+json - application/xml - text/xml - text/csv example: application/json - in: query name: next required: false schema: type: string minLength: 24 maxLength: 24 description: >- The cursor that points to the next page of results. Use the `nextCursor` value returned in a previous response to request the next set of items. - in: query name: previous required: false schema: type: string minLength: 24 maxLength: 24 description: >- The cursor that points to the previous page of results. Use the `previousCursor` value returned in a previous response to request the previous set of items. - in: query name: type required: false description: The log level to filter log entries by. schema: type: array items: type: string enum: - fatal - error - warn - info - debug - trace - in: query name: userId required: false description: The ID of the user to filter log entries by. schema: type: string - in: query name: flowName required: false description: The name of the Flow to filter log entries by. schema: type: string - in: query name: sessionId required: false description: > The ID of the session to filter log entries by. Matched exactly and case-sensitively; a partial value returns no results. schema: type: string maxLength: 1024 - in: query name: lastTimeWindow required: false description: > How many hours back the query should read, counted from now. Overrides the cluster's configured tail cutoff for this request only. Omit it to keep the configured cutoff, except on count: when the cutoff feature is off and this parameter is omitted, count substitutes a one-hour safety floor rather than scanning unbounded (tail may still be unbounded because it stops after one page). Every cluster accepts 1, 6 and 12, and each also accepts its own configured cutoff value (for example 24 on a cluster configured with a 24-hour cutoff); any other value is rejected with a 400 that lists the accepted set, which is why no enum is published here. Requires the log entries v2 model. Send it together with the `x-cognigy-log-model-version: v2` header, unless the service has the v2 model enabled cluster-wide, in which case the header is not needed; the 400 is returned only when the request would otherwise route to the v1 model. schema: type: integer minimum: 1 example: 6 - in: header name: x-cognigy-log-model-version required: false schema: type: string enum: - v1 - v2 description: >- When set to "v2", response items include the full V2 model with a nested `metadata` object containing `organizationId`, `projectId`, and `type`. responses: '200': description: Returns array of the latest Log Entries content: application/json: schema: type: object properties: items: type: array items: type: object oneOf: - type: object properties: _id: type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 timestamp: type: string format: date-time msg: type: string type: type: string enum: - fatal - error - warn - info - debug - trace meta: type: object traceId: type: string - type: object required: - _id - timestamp - metadata properties: _id: type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 timestamp: type: string format: date-time msg: type: string meta: type: object traceId: type: string metadata: type: object required: - organizationId - projectId - type properties: organizationId: type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 projectId: type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 type: type: string enum: - fatal - error - warn - info - debug - trace total: type: integer example: 1 nextCursor: nullable: true type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 previousCursor: nullable: true type: string pattern: ^[a-z0-9]{24}$ minLength: 24 maxLength: 24 '400': description: > Bad request. Returned for an invalid cursor, an unsupported `lastTimeWindow`, or when `lastTimeWindow` is sent to a request that would otherwise use the v1 model. content: application/json: schema: type: object properties: status: type: integer code: type: integer type: type: string detail: type: string example: The provided cursor value is invalid. '401': description: >- The request has not been applied because it lacks valid authentication credentials for the target resource. content: application/json: schema: type: object properties: type: type: string example: Unauthorized title: type: string example: Unauthorized Error status: type: number example: 401 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 401 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '402': description: Upgrade your Plan to increase your Quota. content: application/json: schema: type: object properties: type: type: string example: Payment Required title: type: string example: Payment Required Error status: type: number example: 402 detail: type: string example: Validation failed. Missing payload. instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 402 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '403': description: The server understood the request but refuses to authorize it. content: application/json: schema: type: object properties: type: type: string example: Forbidden title: type: string example: Forbidden Error status: type: number example: 403 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '404': description: >- The origin server did not find a current representation for the target resource or is not willing to disclose that one exists. content: application/json: schema: type: object properties: type: type: string example: Not Found title: type: string example: Not Found Error status: type: number example: 404 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} logLevel: type: string example: error '405': description: >- The method received in the request-line is known by the origin server but not supported by the target resource. content: application/json: schema: type: object properties: type: type: string example: Method Not Allowed title: type: string example: Method Not Allowed Error status: type: number example: 405 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '409': description: The request conflicts with current state of the server. content: application/json: schema: type: object properties: type: type: string example: Conflict title: type: string example: Conflict Error status: type: number example: 409 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1004 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '413': description: The request entity is larger than limits defined by server. content: application/json: schema: type: object properties: type: type: string example: Payload Too Large title: type: string example: Payload Too Large Error status: type: number example: 413 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '500': description: >- The server encountered an unexpected condition that prevented it from fulfilling the request. content: application/json: schema: type: object properties: type: type: string example: Internal Server Error title: type: string example: Internal Server Error status: type: number example: 500 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '501': description: >- The server does not support the functionality required to fulfill the request. content: application/json: schema: type: object properties: type: type: string example: Not Implemented title: type: string example: Not Implemented Error status: type: number example: 501 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1009 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '502': description: >- The server, while acting as a gateway or proxy, received an invalid response from an inbound server it accessed while attempting to fulfill the request. content: application/json: schema: type: object properties: type: type: string example: Bad Gateway title: type: string example: Bad Gateway Error status: type: number example: 502 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '503': description: The server is not ready to handle the request. content: application/json: schema: type: object properties: type: type: string example: Service Unavailable title: type: string example: Service Unavailable Error status: type: number example: 503 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 503 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} '504': description: >- The server, while acting as a gateway or proxy, did not receive a timely response from an upstream server it needed to access in order to complete the request. content: application/json: schema: type: object properties: type: type: string example: Gateway Timeout title: type: string example: Gateway Timeout Error status: type: number example: 504 detail: type: string instance: type: string example: /v2.0/flows/5ce7c2d833ea1e04d7e6c432 code: type: string example: 1000 traceId: type: string example: api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f details: type: object example: {} security: - APIKeyHeader: [] - APIKeyQueryParam: [] - CXoneTokenHeader: [] - OAuth2: [] components: securitySchemes: APIKeyHeader: type: apiKey in: header name: X-API-Key description: Supply the API Key in the HTTP-Header APIKeyQueryParam: type: apiKey in: query name: api_key description: Supply the API Key in the Url-Query CXoneTokenHeader: type: apiKey in: header name: x-cxone-authorization description: >- Supply the CXone Token in the HTTP-Header containing the word "Bearer" followed by a space and a Token String. Applicable only in CXone integrated environments. OAuth2: type: oauth2 flows: password: tokenUrl: /auth/oauth2/token refreshUrl: /auth/oauth2/token scopes: {} authorizationCode: authorizationUrl: /auth/oauth2/authorize tokenUrl: /auth/oauth2/token scopes: {} BasicAuth: type: http scheme: basic description: Basic Authentication used by routes designed for the Management-UI. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.