> ## Documentation Index > Fetch the complete documentation index at: https://docs.cotool.ai/llms.txt > Use this file to discover all available pages before exploring further. # Resend a failed output delivery or notification > Opens a new attempt for a failed delivery, sending the content the turn and evaluation hold now. Only deliveries in the failed state whose destination still exists can be resent; the send is real and may create a message/incident/issue/case in the destination. ## OpenAPI ````yaml https://app.cotool.ai/api/docs/openapi.json post /api/agent-runs/{runId}/deliveries/{deliveryId}/resend openapi: 3.1.0 info: title: Cotool API version: 1.0.0 description: >- The Cotool REST API. Authenticate with an API key from `/settings/api-keys` sent as `Authorization: Bearer `. Authentication, error formats, pagination, and common integration recipes are documented in the [API overview](https://docs.cotool.ai/api-reference/introduction). Endpoints marked **Deprecated** keep working; each one's description names its replacement. servers: - url: https://app.cotool.ai description: Production server security: - ApiKeyAuth: [] tags: - name: Agents description: Create, update, run, and version agents. - name: Agent Runs description: Inspect agent runs, submit feedback, and read evaluation metrics. - name: Agent Triggers description: Webhook, schedule, and integration triggers that start agent runs. - name: Agents as Code description: Validate agents and skills defined as YAML in a Git repository. - name: Skills description: Reusable instructions and tool grants attached to agents. - name: Chat description: Chat sessions and their transcripts. - name: Alerts description: Alert triage, routing, and escalation notifications. - name: Output Destinations description: Webhook, Slack, Jira, and Linear destinations for agent output. - name: Detections description: Detection agents, detection hits, and the Cotool detection library. - name: Hunt description: Autonomous hunt threats, gaps, and settings. - name: Intel description: Threat-intelligence feed items, indicators, and sources. - name: Threat Model description: The organization threat model and its version history. - name: MITRE Coverage description: MITRE ATT&CK coverage across detections. - name: Tools description: Connected tool integrations and captured tool output. - name: CLIs description: Connected CLI integrations. - name: Artifacts description: Files and reports produced by agent runs. - name: Audit Logs description: Organization audit log export and event catalog. - name: Users description: Users, memberships, and the current session. - name: Roles description: Role-based permissions. - name: Organizations description: Organization-level metrics. paths: /api/agent-runs/{runId}/deliveries/{deliveryId}/resend: post: tags: - Agent Runs summary: Resend a failed output delivery or notification description: >- Opens a new attempt for a failed delivery, sending the content the turn and evaluation hold now. Only deliveries in the failed state whose destination still exists can be resent; the send is real and may create a message/incident/issue/case in the destination. parameters: - in: path name: runId description: Agent run (chat) ID schema: type: string format: uuid description: Agent run (chat) ID required: true - in: path name: deliveryId description: Delivery record ID schema: type: string format: uuid description: Delivery record ID required: true responses: '200': description: Successful response content: application/json: schema: type: object properties: delivery: type: object properties: id: type: string format: uuid description: Delivery ID runId: type: string format: uuid description: Agent run (chat) ID this delivery belongs to turnId: type: string format: uuid description: Turn of the run whose output or evaluation was sent evalId: type: - string - 'null' format: uuid description: >- Evaluation whose failed criteria were sent, for acceptance-criteria deliveries agentId: type: string format: uuid description: Agent that produced the run destinationId: type: string format: uuid description: Output destination ID destinationType: type: string enum: - webhook - teams - slack - pagerduty - linear - tines description: Destination type destinationName: type: string description: Destination name destinationDeleted: type: boolean description: >- True when the destination has since been deleted; such deliveries cannot be resent purpose: type: string enum: - response - acceptance-criteria description: >- What was sent: the turn output or an acceptance-criteria notification status: type: string enum: - pending - in_progress - retrying - sent - failed description: Status of the current attempt attempt: type: integer description: >- Latest job retry number reported by the current attempt resendCount: type: integer description: How many times a user has resent this delivery preview: type: object properties: title: type: string description: >- Short title of the content that was (or will be) sent text: type: string description: >- Truncated preview of the content that was (or will be) sent required: - text description: Preview of the content sent sentSummary: type: - object - 'null' properties: target: type: string description: >- Credential-free description of where it went (hostname, channel list, team, dedup key) refs: type: array items: type: object properties: label: type: string description: >- Human-readable label for the created/sent artifact (e.g. Linear issue identifier) url: type: string description: >- Direct link to the artifact when the destination provides one externalId: type: string description: >- Destination-side identifier (e.g. Slack message ts, Linear issue id) required: - label description: Artifacts created or messages posted by the send slackChannels: type: array items: type: object properties: channelId: type: string description: Slack channel ID status: type: string enum: - sent - skipped description: >- Whether the message was posted to this channel messageTs: type: string description: >- Slack message timestamp when posted by this attempt skipReason: type: string description: >- Why the channel was skipped (e.g. archived, bot not in channel) required: - channelId - status description: Per-channel results for Slack destinations partial: type: boolean description: >- True when at least one target (e.g. a Slack channel) was skipped required: - target - refs - partial description: Details recorded when the current attempt sent error: type: - object - 'null' properties: message: type: string description: Error message from the most recent failed attempt name: type: string description: Error class name, when available attempt: type: integer description: Job retry number that produced this error at: type: string description: ISO timestamp when the error was recorded required: - message - attempt - at description: Most recent error of the current attempt, if any lastEnqueuedAt: type: string description: ISO timestamp when the current attempt was queued startedAt: type: - string - 'null' description: ISO timestamp when the current attempt first started sentAt: type: - string - 'null' description: ISO timestamp when the current attempt sent failedAt: type: - string - 'null' description: ISO timestamp when the current attempt failed attempts: type: array items: type: object properties: id: type: string format: uuid description: Attempt ID number: type: integer description: >- Position of this attempt within the delivery, starting at 1 trigger: type: string enum: - initial - resend description: >- What opened the attempt: the run itself or a user resend requestedByUserId: type: - string - 'null' format: uuid description: >- User who requested the resend, when the trigger is resend jobId: type: string format: uuid description: The delivery job that ran this attempt jobAttempt: type: integer description: Latest retry number the job reported status: type: string enum: - pending - in_progress - retrying - sent - failed description: Attempt status error: type: - object - 'null' properties: message: type: string description: >- Error message from the most recent failed attempt name: type: string description: Error class name, when available attempt: type: integer description: Job retry number that produced this error at: type: string description: ISO timestamp when the error was recorded required: - message - attempt - at description: Most recent error of this attempt, if any sentSummary: type: - object - 'null' properties: target: type: string description: >- Credential-free description of where it went (hostname, channel list, team, dedup key) refs: type: array items: type: object properties: label: type: string description: >- Human-readable label for the created/sent artifact (e.g. Linear issue identifier) url: type: string description: >- Direct link to the artifact when the destination provides one externalId: type: string description: >- Destination-side identifier (e.g. Slack message ts, Linear issue id) required: - label description: >- Artifacts created or messages posted by the send slackChannels: type: array items: type: object properties: channelId: type: string description: Slack channel ID status: type: string enum: - sent - skipped description: >- Whether the message was posted to this channel messageTs: type: string description: >- Slack message timestamp when posted by this attempt skipReason: type: string description: >- Why the channel was skipped (e.g. archived, bot not in channel) required: - channelId - status description: Per-channel results for Slack destinations partial: type: boolean description: >- True when at least one target (e.g. a Slack channel) was skipped required: - target - refs - partial description: Details recorded when this attempt sent enqueuedAt: type: string description: ISO timestamp when the attempt was queued startedAt: type: - string - 'null' description: >- ISO timestamp when the job first started this attempt finishedAt: type: - string - 'null' description: >- ISO timestamp when the attempt reached sent or failed required: - id - number - trigger - requestedByUserId - jobId - jobAttempt - status - error - sentSummary - enqueuedAt - startedAt - finishedAt description: Every attempt of this delivery, oldest first createdAt: type: string description: ISO timestamp when the delivery was created updatedAt: type: string description: ISO timestamp of the last status change required: - id - runId - turnId - evalId - agentId - destinationId - destinationType - destinationName - destinationDeleted - purpose - status - attempt - resendCount - preview - sentSummary - error - lastEnqueuedAt - startedAt - sentAt - failedAt - attempts - createdAt - updatedAt description: The delivery after its new attempt was queued required: - delivery '400': description: Bad request — input validation failed or the request was malformed content: application/json: schema: $ref: '#/components/schemas/ValidationError' '401': description: Unauthorized — missing or invalid API key / session content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Forbidden — the authenticated user lacks the required permissions content: application/json: schema: $ref: '#/components/schemas/PermissionError' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' x-codeSamples: - lang: shell label: cURL source: >- curl -X POST "https://app.cotool.ai/api/agent-runs/:runId/deliveries/:deliveryId/resend" \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" components: schemas: ValidationError: type: object properties: error: type: string description: Error message describing what went wrong issues: type: array description: >- Detailed validation issues, present when request or response schema validation fails items: type: object additionalProperties: true required: - error Error: type: object properties: error: type: string description: Error message describing what went wrong required: - error PermissionError: type: object properties: error: type: string description: Error message describing what went wrong missingPerms: type: array description: Permissions the authenticated user is missing for this operation items: type: string required: - error securitySchemes: ApiKeyAuth: type: http scheme: bearer bearerFormat: API Key description: >- API Key authentication for programmatic access. Include your API key in the Authorization header as: `Bearer your_api_key_here` ````