> ## 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. # Check whether a LinkedIn comment, post or repost went out > Ask what a LinkedIn comment, post or repost came to, without sending: by the client_reference it went out under and its verb (comment, create-post, repost), optionally at one place (entity_urn: the post a comment or a repost went to, in any of its forms, or the comment a reply answers; parent_comment_urn for a reply; post_place for a post), or by the activity_log_sid a 409 named. result.outcome: sent (item is what it made, or null with reason result_pending or caller_confirmed), in_flight, unknown (LinkedIn has not shown it yet; retry_after, send_decisive_at), or not_sent (no_send_under_key, refused, not_on_linkedin, caller_confirmed). Send the same request again only on not_sent, under the same key. result.activity_log_sid is the attempt a person's word names (confirmed_not_sent / confirmed_sent on the send). A send in doubt has LinkedIn read now when the last look is old enough. A key sent to several places is 422 place_required, a place LinkedIn could not be read for 422 place_unmatched (context.places). Contract: - MCP tool `check_linkedin_posting_sent`, registry package `mcp.linkedin/linkedin_posting`, mount `linkedin.content`. - Operation `action`, response envelope `action`. - Flags: none. ## OpenAPI ````yaml /api-reference/linkedin/openapi.yaml post /api/linkedin-posting/check-sent openapi: 3.0.3 info: title: 'GTM API public contract: gtm.service.linkedin' description: >- Connected LinkedIn accounts and everything driven through them: account health and smart limits, conversations and messages, the connection graph, outbound posting, scraping, profile and company enrichment, and the antidetect browsers that execute it all. 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.linkedin`, 189 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/linkedin/v4 description: Production, through the app.gtm-api.com gateway security: - BearerJwt: [] TeamSid: [] tags: - name: antidetect_browser_logs description: >- Registry package `mcp.linkedin/antidetect_browser_logs`, served on MCP mount `linkedin.browsers`. - name: antidetect_browser_proxies description: >- Registry package `mcp.linkedin/antidetect_browser_proxies`, served on MCP mount `linkedin.browsers`. - name: antidetect_browsers description: >- Registry package `mcp.linkedin/antidetect_browsers`, served on MCP mount `linkedin.browsers`. - name: cloud_browser_sessions description: >- Registry package `mcp.linkedin/cloud_browser_sessions`, served on MCP mount `linkedin.browsers`. - name: cloud_browsers description: >- Registry package `mcp.linkedin/cloud_browsers`, served on MCP mount `linkedin.browsers`. - name: data_requests description: >- Registry package `mcp.linkedin/data_requests`, served on MCP mount `linkedin.data`. - name: linkedin_account_activity_log description: >- Registry package `mcp.linkedin/linkedin_account_activity_log`, served on MCP mount `linkedin.account-monitor`. - name: linkedin_account_block_log description: >- Registry package `mcp.linkedin/linkedin_account_block_log`, served on MCP mount `linkedin.account-monitor`. - name: linkedin_account_quota_hits description: >- Registry package `mcp.linkedin/linkedin_account_quota_hits`, served on MCP mount `linkedin.account-monitor`. - name: linkedin_account_smart_limits description: >- Registry package `mcp.linkedin/linkedin_account_smart_limits`, served on MCP mount `linkedin.accounts`. - name: linkedin_account_snapshots description: >- Registry package `mcp.linkedin/linkedin_account_snapshots`, served on MCP mount `linkedin.account-monitor`. - name: linkedin_account_sync_runs description: >- Registry package `mcp.linkedin/linkedin_account_sync_runs`, served on MCP mount `linkedin.account-monitor`. - name: linkedin_accounts description: >- Registry package `mcp.linkedin/linkedin_accounts`, served on MCP mount `linkedin.accounts`. - name: linkedin_auto_scrape_results description: >- Registry package `mcp.linkedin/linkedin_auto_scrape_results`, served on MCP mount `linkedin.auto-scrapes`. - name: linkedin_auto_scrape_runs description: >- Registry package `mcp.linkedin/linkedin_auto_scrape_runs`, served on MCP mount `linkedin.auto-scrapes`. - name: linkedin_auto_scrapes description: >- Registry package `mcp.linkedin/linkedin_auto_scrapes`, served on MCP mount `linkedin.auto-scrapes`. - name: linkedin_benchmarks description: >- Registry package `mcp.linkedin/linkedin_benchmarks`, served on MCP mount `linkedin.account-monitor`. - name: linkedin_connection_invitations description: >- Registry package `mcp.linkedin/linkedin_connection_invitations`, served on MCP mount `linkedin.network`. - name: linkedin_connection_requests description: >- Registry package `mcp.linkedin/linkedin_connection_requests`, served on MCP mount `linkedin.network`. - name: linkedin_connections description: >- Registry package `mcp.linkedin/linkedin_connections`, served on MCP mount `linkedin.network`. - name: linkedin_conversations description: >- Registry package `mcp.linkedin/linkedin_conversations`, served on MCP mount `linkedin.messaging`. - name: linkedin_custom_requests description: >- Registry package `mcp.linkedin/linkedin_custom_requests`, served on MCP mount `linkedin.platform`. - name: linkedin_enrichment description: >- Registry package `mcp.linkedin/linkedin_enrichment`, served on MCP mount `linkedin.enrichment`. - name: linkedin_followers description: >- Registry package `mcp.linkedin/linkedin_followers`, served on MCP mount `linkedin.network`. - name: linkedin_messages description: >- Registry package `mcp.linkedin/linkedin_messages`, served on MCP mount `linkedin.messaging`. - name: linkedin_posting description: >- Registry package `mcp.linkedin/linkedin_posting`, served on MCP mount `linkedin.content`. - name: linkedin_scraping description: >- Registry package `mcp.linkedin/linkedin_scraping`, served on MCP mount `linkedin.scraping`. paths: /api/linkedin-posting/check-sent: post: tags: - linkedin_posting summary: Check whether a LinkedIn comment, post or repost went out description: >- Ask what a LinkedIn comment, post or repost came to, without sending: by the client_reference it went out under and its verb (comment, create-post, repost), optionally at one place (entity_urn: the post a comment or a repost went to, in any of its forms, or the comment a reply answers; parent_comment_urn for a reply; post_place for a post), or by the activity_log_sid a 409 named. result.outcome: sent (item is what it made, or null with reason result_pending or caller_confirmed), in_flight, unknown (LinkedIn has not shown it yet; retry_after, send_decisive_at), or not_sent (no_send_under_key, refused, not_on_linkedin, caller_confirmed). Send the same request again only on not_sent, under the same key. result.activity_log_sid is the attempt a person's word names (confirmed_not_sent / confirmed_sent on the send). A send in doubt has LinkedIn read now when the last look is old enough. A key sent to several places is 422 place_required, a place LinkedIn could not be read for 422 place_unmatched (context.places). Contract: - MCP tool `check_linkedin_posting_sent`, registry package `mcp.linkedin/linkedin_posting`, mount `linkedin.content`. - Operation `action`, response envelope `action`. - Flags: none. operationId: check_linkedin_posting_sent requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CheckLinkedinPostingSentRequest' responses: '200': description: '`action` success envelope.' content: application/json: schema: $ref: '#/components/schemas/CheckLinkedinPostingSentResponse' 4XX: $ref: '#/components/responses/McpClientError' 5XX: $ref: '#/components/responses/McpServerError' components: schemas: CheckLinkedinPostingSentRequest: type: object description: Request body of `check_linkedin_posting_sent`. properties: linkedin_account_sid: type: string minLength: 18 maxLength: 18 pattern: ^ln_ac_ description: >- The account that sent (ln_ac_…). A key is looked up on this account only. client_reference: type: string nullable: true minLength: 1 maxLength: 255 description: >- The key the send went out under, byte for byte. Exactly one of client_reference / activity_log_sid. Found at any age: a send in doubt never ages out of its key. activity_log_sid: type: string nullable: true minLength: 18 maxLength: 18 pattern: ^ln_al_ description: >- The attempt a 409 or an earlier check named (ln_al_…); it takes no verb and no place. An attempt of another account, or one that is no comment, post or repost, is 404. verb: type: string nullable: true enum: - comment - create-post - repost description: >- Required with client_reference: the verb the key was sent by (create_linkedin_comment, create_linkedin_post, repost_linkedin_post). A key is one send per verb. entity_urn: type: string nullable: true maxLength: 512 description: >- Place, next to client_reference: the post a comment or a repost went to, as the send took it or in any other of its forms (it is read for its thread, on the post-details cache), or a comment urn for a reply. Not with create-post. parent_comment_urn: type: string nullable: true maxLength: 512 description: >- Place, next to client_reference and verb comment: the comment a reply answers, in either of its forms. post_place: type: string nullable: true maxLength: 128 pattern: >- ^(?:feed:member|feed:org:\d+|group:\d+(?::org:\d+)?)(?::scheduled:\d+)?$ description: >- Place, next to client_reference and verb create-post: where the post landed: feed:member (your own feed), feed:org: (a company page it was posted as), group: (a group; group::org: when a page posted into it), optionally :scheduled: after it. A key is read at the feed, page or group whatever its slot. required: - linkedin_account_sid CheckLinkedinPostingSentResponse: 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: comment_urn: type: string nullable: true description: 'A comment or a reply: the comment it made.' kind: type: string description: 'A repost: instant or with_thoughts.' activity_urn: type: string nullable: true description: 'A post or a repost: its feed entry.' post_urn: type: string nullable: true description: 'A post or a repost: the publication.' url: type: string nullable: true created_at: type: string nullable: true text: type: string parent_post_urn: type: string nullable: true description: 'A repost: the post it reposted.' description: >- What the send made, in the shape its own verb answers: a comment the comment_urn; a post its urns, url, time and body; a repost its kind, urns, url, time, body and the reposted post. result: type: object properties: outcome: type: string description: >- sent | not_sent | in_flight | unknown. Send the same request again only on not_sent; on in_flight or unknown ask again after retry_after. reason: type: string nullable: true description: >- Why. sent: null (item is what it made), result_pending (it went out, what it made is read later), caller_confirmed (a person said so; no item). not_sent: no_send_under_key, refused, not_on_linkedin, caller_confirmed. unknown: answer_lost, may_still_land, unreadable, unexplained, unprovable (a group post, or a page post its page has not shown: no read can prove either absent). retry_after: type: string description: >- ISO 8601: for a send in doubt, when LinkedIn is read for it next. activity_log_sid: type: string description: >- The attempt the answer is about (in flight, in doubt or landed): what confirmed_not_sent / confirmed_sent name on the comment, post and repost tools. send_decisive_at: type: string description: >- ISO 8601: the moment a send in doubt can no longer land; a person's confirmed_not_sent is taken from then on. A plain repost carries no deadline of its own, so it is an hour after its answer was lost. required: - outcome - reason 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. team_sid: type: string nullable: true description: >- The team this call ran in (the token team, or the team_sid override). Null when unauthenticated; absent from pre-2026-08-20 backends. actor_type: type: string nullable: true description: >- user | agent | api_key | system. Null when unauthenticated; absent from pre-2026-08-20 backends. required: - trace_id - span_id - timestamp - duration_ms 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: 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. team_sid: type: string nullable: true description: >- The team this call ran in (the token team, or the team_sid override). Null when unauthenticated; absent from pre-2026-08-20 backends. actor_type: type: string nullable: true description: >- user | agent | api_key | system. Null when unauthenticated; absent from pre-2026-08-20 backends. required: - trace_id - span_id - timestamp - duration_ms 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. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.