> ## Documentation Index > Fetch the complete documentation index at: https://docs.polymorfa.com/llms.txt > Use this file to discover all available pages before exploring further. # Acknowledge project event stream > **Required scope:** `events:listen` Acknowledges every event up to and including `sequence` on a stream opened with `ack=manual`. Acknowledgements are cumulative and idempotent. Use the same credential that opened the stream. ## OpenAPI ````yaml api-reference/features/operate.json POST /platform/projects/{projectId}/events/stream/{streamId}/ack openapi: 3.0.3 info: title: Operate API methods version: 1.0.0 description: Task-focused operate methods across supported Polymorfa connection types. servers: [] security: [] paths: /platform/projects/{projectId}/events/stream/{streamId}/ack: post: tags: - Events summary: Acknowledge project event stream description: >- **Required scope:** `events:listen` Acknowledges every event up to and including `sequence` on a stream opened with `ack=manual`. Acknowledgements are cumulative and idempotent. Use the same credential that opened the stream. operationId: managementAcknowledgeProjectEventStream parameters: - schema: type: string format: uuid required: true name: projectId in: path description: |- Identifier of the Polymorfa project that owns this resource. **Value constraints** | Constraint | Accepted input | | --- | --- | | Format | `uuid` | - schema: type: string format: uuid required: true name: streamId in: path description: |- Identifier for the stream. **Value constraints** | Constraint | Accepted input | | --- | --- | | Format | `uuid` | requestBody: required: true content: application/json: schema: $ref: >- #/components/schemas/management__PlatformAccessEventStreamAckRequest responses: '200': description: Acknowledged content: application/json: schema: $ref: >- #/components/schemas/management__PlatformAccessEventStreamAckResponse '400': description: Invalid acknowledgement. content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' '401': description: Missing or invalid credential. content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' '403': description: '`missing_scope` or `permission_denied`.' content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' '404': description: The stream is not open for this credential and project. content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' '409': description: >- `state_conflict`: the stream closed or the acknowledgement regressed or is ahead of delivery. content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' '429': description: '`rate_limit_exceeded`. Follow `Retry-After`.' content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' '503': description: A required service is unavailable. Retry with backoff. content: application/json: schema: $ref: '#/components/schemas/management__PlatformAccessPublicError' security: - management__ApiKeyAuth: [] servers: - url: https://api.polymorfa.com components: schemas: management__PlatformAccessEventStreamAckRequest: type: object properties: cursor: type: string minLength: 1 maxLength: 4096 description: >- Specifies cursor for this management platform access event stream ack request. **Value constraints** | Constraint | Accepted input | | --- | --- | | String length | `1` through `4096` characters | sequence: type: integer minimum: 1 maximum: 9007199254740991 description: >- Specifies sequence for this management platform access event stream ack request. **Value constraints** | Constraint | Accepted input | | --- | --- | | Numeric value | `1` through `9007199254740991` (inclusive) | required: - cursor - sequence additionalProperties: false management__PlatformAccessEventStreamAckResponse: type: object properties: data: type: object properties: streamId: type: string format: uuid description: |- Identifier for the stream. **Value constraints** | Constraint | Accepted input | | --- | --- | | Format | `uuid` | acknowledgedCursor: type: string description: Specifies acknowledged cursor for this data. sequence: type: integer description: Specifies sequence for this data. replayed: type: boolean description: Whether replayed. required: - streamId - acknowledgedCursor - sequence - replayed additionalProperties: false description: Structured data carried by this object. required: - data additionalProperties: false management__PlatformAccessPublicError: type: object properties: error: type: object properties: type: type: string enum: - invalid_request_error - authentication_error - permission_error - conflict_error - rate_limit_error - api_error - upstream_error description: |- Type discriminator for this object. **Allowed values** | Value | Meaning | | --- | --- | | `invalid_request_error` | Invalid request error. | | `authentication_error` | Authentication error. | | `permission_error` | Permission error. | | `conflict_error` | Conflict error. | | `rate_limit_error` | Rate limit error. | | `api_error` | Api error. | | `upstream_error` | Upstream error. | code: type: string enum: - invalid_parameter - invalid_credential - entitlement_required - method_not_allowed - permission_denied - missing_scope - resource_not_found - media_fetch_failed - resource_gone - feature_unavailable - stream_cursor_invalid - stream_cursor_expired - stream_connection_limit_reached - state_conflict - idempotency_conflict - idempotency_in_progress - idempotency_completed - idempotency_outcome_unknown - call_claimed - call_not_ringing - connection_limit - unsupported_for_connection - call_permission_required - invalid_sip_trunk - calls_disabled - sip_trunk_in_use - sip_trunk_revision_conflict - sip_trunk_limit - sip_unavailable - rate_limit_exceeded - internal_error - operation_not_supported - upstream_failure - service_unavailable - credential_verification_unavailable - session_not_ready - command_dispatch_failed - result_unknown - recipient_not_on_whatsapp - conversation_window_closed - template_not_approved - media_too_large - whatsapp_rate_limited - new_chat_limit_reached - whatsapp_account_restricted - bansafe_suspended - bansafe_org_suspended - bansafe_cold_blocked - bansafe_cold_held - bansafe_throttled - bansafe_daily_allowance_reached - bansafe_accounting_unavailable - bansafe_send_outcome_unknown - campaigns_not_entitled description: >- Stable machine-readable code for this result. **Allowed values** | Value | Meaning | | --- | --- | | `invalid_parameter` | Invalid parameter. | | `invalid_credential` | Invalid credential. | | `entitlement_required` | Entitlement required. | | `method_not_allowed` | Method not allowed. | | `permission_denied` | Permission denied. | | `missing_scope` | Missing scope. | | `resource_not_found` | Resource not found. | | `media_fetch_failed` | Media fetch failed. | | `resource_gone` | Resource gone. | | `feature_unavailable` | Feature unavailable. | | `stream_cursor_invalid` | Stream cursor invalid. | | `stream_cursor_expired` | Stream cursor expired. | | `stream_connection_limit_reached` | Stream connection limit reached. | | `state_conflict` | State conflict. | | `idempotency_conflict` | Idempotency conflict. | | `idempotency_in_progress` | Idempotency in progress. | | `idempotency_completed` | Idempotency completed. | | `idempotency_outcome_unknown` | Idempotency outcome unknown. | | `call_claimed` | Call claimed. | | `call_not_ringing` | Call not ringing. | | `connection_limit` | Connection limit. | | `unsupported_for_connection` | Unsupported for connection. | | `call_permission_required` | Call permission required. | | `invalid_sip_trunk` | Invalid sip trunk. | | `calls_disabled` | Calls disabled. | | `sip_trunk_in_use` | Sip trunk in use. | | `sip_trunk_revision_conflict` | Sip trunk revision conflict. | | `sip_trunk_limit` | Sip trunk limit. | | `sip_unavailable` | Sip unavailable. | | `rate_limit_exceeded` | Rate limit exceeded. | | `internal_error` | Internal error. | | `operation_not_supported` | Operation not supported. | | `upstream_failure` | Upstream failure. | | `service_unavailable` | Service unavailable. | | `credential_verification_unavailable` | Credential verification unavailable. | | `session_not_ready` | Session not ready. | | `command_dispatch_failed` | Command dispatch failed. | | `result_unknown` | Result unknown. | | `recipient_not_on_whatsapp` | Recipient not on whatsapp. | | `conversation_window_closed` | Conversation window closed. | | `template_not_approved` | Template not approved. | | `media_too_large` | Media too large. | | `whatsapp_rate_limited` | Whatsapp rate limited. | | `new_chat_limit_reached` | New chat limit reached. | | `whatsapp_account_restricted` | Whatsapp account restricted. | | `bansafe_suspended` | Bansafe suspended. | | `bansafe_org_suspended` | Bansafe org suspended. | | `bansafe_cold_blocked` | Bansafe cold blocked. | | `bansafe_cold_held` | Bansafe cold held. | | `bansafe_throttled` | Bansafe throttled. | | `bansafe_daily_allowance_reached` | Bansafe daily allowance reached. | | `bansafe_accounting_unavailable` | Bansafe accounting unavailable. | | `bansafe_send_outcome_unknown` | Bansafe send outcome unknown. | | `campaigns_not_entitled` | Campaigns not entitled. | message: type: string description: Human-readable message associated with this result. param: type: string nullable: true description: |- Specifies param for this error. **Accepted alternatives** | Alternative | Accepted input | | --- | --- | | Alternative 1 | Type: `string` | | Alternative 2 | `null` | request_id: type: string description: >- Matches the X-Request-Id response header. Include it when you contact support. request_log_url: type: string format: uri description: >- Console page that shows this request. Returned only to organization and project credentials whose request was logged. **Value constraints** | Constraint | Accepted input | | --- | --- | | Format | `uri` | required: - type - code - message - param - request_id description: Error details returned when the operation fails. data: type: string nullable: true enum: - null description: |- Always null for a failed request. **Allowed values** | Value | Meaning | | --- | --- | | `null` | Null. | **Accepted alternatives** | Alternative | Accepted input | | --- | --- | | Alternative 1 | Type: `string` | | Alternative 2 | `null` | docs: type: string format: uri description: |- Specifies docs for this management platform access public error. **Value constraints** | Constraint | Accepted input | | --- | --- | | Format | `uri` | required: - error - data - docs securitySchemes: management__ApiKeyAuth: type: http scheme: bearer description: >- Send your team API key or project token as `Authorization: Bearer `. The credential must have the required permissions. Project tokens can access only their own project. ````