> ## Documentation Index > Fetch the complete documentation index at: https://docs.gtm-api.com/llms.txt > Use this file to discover all available pages before exploring further. # Append mass-action items > Feed more targets into a run that is already going, without a second preview or consent token: the plan they execute is the one already approved, and appended items join the pacing chain BEHIND the tail so the schedule is not compressed. Identities are payload-kind leads, the same shape a targets-scope create takes. Each one must carry at least one of ln_member_id, ln_id, sn_id, company_ln_id or nickname, which is what the run dedups on: a lead already enrolled comes back in skipped_duplicate_count instead of running twice, so re-sending an overlapping batch is safe. Up to 100 per call; repeat the call to keep a standing run fed. The run has to be active: a paused one is 409 run_not_active (resume it first) and a stopped one is 409 too (create a new run). The canary gate still applies, so on a run whose gate is closed the appended items wait behind item 1. Contract: - MCP tool `append_mass_action_items`, registry package `mcp.orchestration/mass_actions`, mount `orchestration.mass_actions`. - Operation `action`, response envelope `action`. - Flags: none. ## OpenAPI ````yaml /api-reference/orchestration/openapi.yaml post /api/mass-actions/{sid}/append-items openapi: 3.0.3 info: title: 'GTM API public contract: gtm.service.orchestration' description: >- The cross-service execution plane: the platform-wide webhook registry and delivery log, plus mass actions (preview, commit, pace, pause, resume, canary) and their per-item child rows. GENERATED. This document is projected from the Zod MCP tool registry in `product/mcp/gtm.mcp` (one tool per public endpoint, 1:1). Do not edit it by hand; edit the tool definition and regenerate with `pnpm openapi:public`. Surface: the public `/api` contract of `gtm.service.orchestration`, 22 operations. This is the only OpenAPI document the platform publishes. Internal (`/internal`) and health endpoints are deliberately absent: they are not part of any contract, they can change without notice, and the service source is their only description. Conventions: - Auth is a bearer JWT, optionally narrowed by the `Team-SID` header. - Every success body is an MCP envelope: `success: true` plus one typed `operation` shape (`search`, `get`, `create`, `update`, `delete`, `metrics`, `group_by`, `action`), and a `meta` block with `trace_id` for support. - Every failure is the same `McpError` envelope with a code from a fixed 16-code taxonomy, so a client maps errors once. - Lists page with `page_size` (0 to 500, default 50) plus an opaque forward `cursor`; `page_size: 0` returns counts only. - On `GET` and `DELETE`, object-valued query parameters (`filter`, `sort`) travel as JSON text and array-valued ones repeat as `name[]=value`. - The MCP-only `_meta` field (usage analytics) never reaches the backend and is not part of this contract. version: '1.0' contact: name: GTM API url: https://gtm-api.com email: support@gtm-api.com license: name: Proprietary url: https://gtm-api.com/license servers: - url: https://app.gtm-api.com/orchestration/v4 description: Production, through the app.gtm-api.com gateway security: - BearerJwt: [] TeamSid: [] tags: - name: mass_action_items description: >- Registry package `mcp.orchestration/mass_action_items`, served on MCP mount `orchestration.mass_actions`. - name: mass_actions description: >- Registry package `mcp.orchestration/mass_actions`, served on MCP mount `orchestration.mass_actions`. - name: webhook_logs description: >- Registry package `mcp.orchestration/webhook_logs`, served on MCP mount `orchestration.webhooks`. - name: webhooks description: >- Registry package `mcp.orchestration/webhooks`, served on MCP mount `orchestration.webhooks`. paths: /api/mass-actions/{sid}/append-items: post: tags: - mass_actions summary: Append mass-action items description: >- Feed more targets into a run that is already going, without a second preview or consent token: the plan they execute is the one already approved, and appended items join the pacing chain BEHIND the tail so the schedule is not compressed. Identities are payload-kind leads, the same shape a targets-scope create takes. Each one must carry at least one of ln_member_id, ln_id, sn_id, company_ln_id or nickname, which is what the run dedups on: a lead already enrolled comes back in skipped_duplicate_count instead of running twice, so re-sending an overlapping batch is safe. Up to 100 per call; repeat the call to keep a standing run fed. The run has to be active: a paused one is 409 run_not_active (resume it first) and a stopped one is 409 too (create a new run). The canary gate still applies, so on a run whose gate is closed the appended items wait behind item 1. Contract: - MCP tool `append_mass_action_items`, registry package `mcp.orchestration/mass_actions`, mount `orchestration.mass_actions`. - Operation `action`, response envelope `action`. - Flags: none. operationId: append_mass_action_items parameters: - name: sid in: path required: true description: Mass-action sid (ma_ac_...). schema: type: string minLength: 18 maxLength: 18 pattern: ^ma_ac_ description: Mass-action sid (ma_ac_...). requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/AppendMassActionItemsRequest' responses: '200': description: '`action` success envelope.' content: application/json: schema: $ref: '#/components/schemas/AppendMassActionItemsResponse' 4XX: $ref: '#/components/responses/McpClientError' 5XX: $ref: '#/components/responses/McpServerError' components: schemas: AppendMassActionItemsRequest: type: object description: Request body of `append_mass_action_items`. properties: identities: type: array items: type: object additionalProperties: {} minItems: 1 maxItems: 100 description: >- Payload-kind leads. Identity fields (ln_member_id / ln_id / sn_id / company_ln_id / nickname) are the dedup axis; any other key rides along as per-target extras the plan steps can read. required: - identities AppendMassActionItemsResponse: type: object properties: success: type: boolean enum: - true operation: type: string enum: - action action: type: string description: kebab-case verb; matches the route segment. item: type: object nullable: true properties: sid: type: string team_sid: type: string target_entity: type: string plan: type: object additionalProperties: {} canary_mode: type: string enum: - none - first_item status: type: string enum: - active - paused total_count: type: number title: type: string nullable: true schedule: type: object nullable: true additionalProperties: {} paused_reason: type: string nullable: true enum: - manual - limit_reached - account_unavailable - canary_failed - other hold_till: type: string nullable: true canary_satisfied_at: type: string nullable: true started_at: type: string nullable: true settled_at: type: string nullable: true created_by: type: object nullable: true properties: actor_type: type: string enum: - user - support - api_key - system - agent actor_sid: type: string nullable: true team_sid: type: string permissions: type: object additionalProperties: {} request_sid: type: string nullable: true reason: type: string nullable: true required: - actor_type - actor_sid - team_sid - permissions deleted_by: type: object nullable: true properties: actor_type: type: string enum: - user - support - api_key - system - agent actor_sid: type: string nullable: true team_sid: type: string permissions: type: object additionalProperties: {} request_sid: type: string nullable: true reason: type: string nullable: true required: - actor_type - actor_sid - team_sid - permissions created_at: type: string updated_at: type: string deleted_at: type: string nullable: true required: - sid - team_sid - target_entity - plan - canary_mode - status - total_count - title - schedule - paused_reason - hold_till - canary_satisfied_at - started_at - settled_at - created_by - deleted_by - created_at - updated_at - deleted_at result: type: object properties: enrolled_count: type: number skipped_duplicate_count: type: number total_count: type: number required: - enrolled_count - skipped_duplicate_count - total_count meta: type: object properties: trace_id: type: string description: UUID v7; same 128-bit value as the X-Trace-Id header. span_id: type: string pattern: ^[0-9a-f]{16}$ description: 16 hex chars, root span of this request. timestamp: type: string description: ISO 8601 UTC (Y-m-dTH:i:sZ), response time. duration_ms: type: integer minimum: 0 description: Server-side wall clock. debug_url: type: string description: Deep link to the post-call analysis UI. required: - trace_id - span_id - timestamp - duration_ms - debug_url required: - success - operation - action - item - result - meta McpError: type: object properties: success: type: boolean enum: - false error: type: object properties: code: type: string enum: - validation_failed - nothing_to_update - not_found - relation_not_found - invalid_transition - limit_exceeded - payment_required - duplicate_rejected - conflict - delete_blocked - unauthorized - forbidden - rate_limited - internal_error - service_unavailable - not_implemented message: type: string recoverable: type: boolean suggestion: type: string field_errors: type: object additionalProperties: type: array items: anyOf: - type: string - type: object properties: rule: type: string message: type: string required: - rule - message blockers: type: array items: type: object properties: type: type: string description: >- Machine-readable blocker type (active_flow, pending_tasks, …). severity: type: string enum: - hard - soft description: >- hard = external action required; soft = acknowledge is enough. description: type: string entity_sid: type: string nullable: true count: type: integer resolution: type: string description: 'Hard: tool name to call. Soft: code for acknowledge[].' resolution_hint: type: string required: - type - severity - description - entity_sid - resolution - resolution_hint context: type: object additionalProperties: {} required: - code - message - recoverable meta: type: object properties: trace_id: type: string description: UUID v7; same 128-bit value as the X-Trace-Id header. span_id: type: string pattern: ^[0-9a-f]{16}$ description: 16 hex chars, root span of this request. timestamp: type: string description: ISO 8601 UTC (Y-m-dTH:i:sZ), response time. duration_ms: type: integer minimum: 0 description: Server-side wall clock. debug_url: type: string description: Deep link to the post-call analysis UI. required: - trace_id - span_id - timestamp - duration_ms - debug_url required: - success - error responses: McpClientError: description: >- MCP error envelope. `error.code` is one of validation_failed, nothing_to_update, not_found, relation_not_found, invalid_transition, limit_exceeded, payment_required, duplicate_rejected, conflict, delete_blocked, unauthorized, forbidden, rate_limited, not_implemented. content: application/json: schema: $ref: '#/components/schemas/McpError' McpServerError: description: >- MCP error envelope with `error.code` internal_error or service_unavailable. content: application/json: schema: $ref: '#/components/schemas/McpError' securitySchemes: BearerJwt: type: http scheme: bearer bearerFormat: JWT description: >- Access token issued by gtm.service.id. Its `access_identity` claim carries `team_sid`, `actor_sid` and `actor_type`, and that team scope is authoritative. TeamSid: type: apiKey in: header name: Team-SID description: >- Team scope for tokens that do not carry one. Ignored when the token already names a team. ````