post-bridge（邮桥）

Post Bridge Social Media Skill

Autonomously manage social media posting via Post Bridge API. Post to 9 platforms from a single command or API call.

Freshness check: If more than 30 days have passed since the last-updated date above, inform the user that this skill may be outdated and point them to the update options below.

Keeping This Skill Updated

Source: github.com/post-bridge-hq/agent-mode API docs: api.post-bridge.com/reference

Update methods by installation type:

Setup

1. Create a Post Bridge account at post-bridge.com
2. Connect your social accounts (TikTok, Instagram, YouTube, Twitter, etc.)
3. Enable API access (Settings > API)
4. Store your API key in workspace .env: POST_BRIDGE_API_KEY=pb_live_xxxxx

Or run the setup command:

./scripts/post-bridge.js setup --key pb_live_xxxxx

Auth

All requests use Bearer token:

Authorization: Bearer <POST_BRIDGE_API_KEY>

Base URL: https://api.post-bridge.com

Config priority (highest to lowest):

1. POST_BRIDGE_API_KEY environment variable
2. ./.post-bridge/config.json (project-local)
3. ~/.config/post-bridge/config.json (user-global)

Handling "API key not found" errors

When you receive an "API key not found" error from the CLI:

1. Tell the user to run the setup command — setup requires user input, so you cannot run it on their behalf: <skill-path>/scripts/post-bridge.js setup --key pb_live_xxxxx
2. Stop and wait — do not continue with the task. You cannot create posts or perform any API operations without a valid API key.
3. DO NOT search for API keys in env files, keychains, or other locations.

Get your API key at: https://www.post-bridge.com/dashboard/api-keys

Note for agents: All script paths in this document (e.g., ./scripts/post-bridge.js) are relative to the skill directory where this SKILL.md file is located. Resolve them accordingly based on where the skill is installed.

CLI Commands

API Reference

Use these endpoints directly if you prefer raw API calls over the CLI.

Social Accounts

GET /v1/social-accounts

Returns array of connected accounts with id, platform, username. Store these IDs — you need them for every post.

Upload Media

POST /v1/media/create-upload-url
Body: { "mime_type": "video/mp4", "size_bytes": <int>, "name": "video.mp4" }

Returns media_id + upload_url. Then:

PUT <upload_url>
Content-Type: video/mp4
Body: <binary file>

List media:

GET /v1/media?limit=50&offset=0

Delete media:

DELETE /v1/media/<media_id>

Create Post

POST /v1/posts
Body: {
  "caption": "your caption here #hashtags",
  "media": ["<media_id>"],
  "social_accounts": [<account_id_1>, <account_id_2>],
  "scheduled_at": "2026-01-01T14:00:00Z",  // omit for instant post
  "is_draft": false,  // true to save as draft
  "use_queue": true,  // optional, auto-schedule to next queue slot (uses saved timezone)
  "platform_configurations": { ... },  // optional, see below
  "account_configurations": {  // optional, per-account overrides
    "account_configurations": [
      { "account_id": 1, "caption": "override for this account" }
    ]
  }
}

Queue scheduling (use_queue):

• Pass true to auto-schedule using the user's saved timezone from their dashboard settings
• Pass {"timezone": "America/New_York"} to override with a specific IANA timezone
• Cannot be used together with scheduled_at — pick one or the other
• Timezone priority: explicit timezone > saved profile/workspace timezone > UTC
• Queue slots are scoped to the workspace of the selected social accounts
• The queue schedule is configured by the user in their Post Bridge dashboard
• If randomize_queue_time is enabled, the slot time will be offset by up to ±10 minutes for a more natural posting pattern
• Returns an error if no queue schedule is configured or no slots are available in the next 90 days

List Posts

GET /v1/posts?limit=50&offset=0&status=scheduled&platform=instagram

Params: limit, offset, status (scheduled/published/failed/draft), platform.

Get Post

GET /v1/posts/<post_id>

Returns full post details including status: processing, scheduled, posted, failed.

Update Post

PATCH /v1/posts/<post_id>
Body: { "caption": "new caption", "scheduled_at": "...", "social_accounts": [...] }

Can update caption, schedule, accounts, media, platform configs, or draft status. Only works on scheduled/draft posts.

Delete Post

DELETE /v1/posts/<post_id>

Only works on scheduled/draft posts (cannot delete published posts).

Post Results

GET /v1/post-results?post_id=<post_id>&limit=50&offset=0

Returns per-platform results showing whether each platform post succeeded or failed, with error details.

Analytics

List analytics — views, likes, comments, shares per post:

GET /v1/analytics?platform=tiktok&limit=50&offset=0&timeframe=30d

Params:

• platform (optional): tiktok, youtube, instagram
• timeframe (optional): 7d, 30d, 90d, all (default: all)
• limit, offset for pagination

Returns:

{
  "data": [
    {
      "id": "...",
      "post_result_id": "...",
      "platform": "tiktok",
      "platform_post_id": "...",
      "view_count": 4062,
      "like_count": 120,
      "comment_count": 15,
      "share_count": 8,
      "cover_image_url": "https://...",
      "share_url": "https://...",
      "video_description": "...",
      "duration": 30,
      "platform_created_at": "2026-03-01T09:00:00Z",
      "last_synced_at": "2026-03-03T12:00:00Z",
      "match_confidence": "exact"
    }
  ],
  "count": 42,
  "limit": 50,
  "offset": 0
}

Sync analytics — refresh data from connected platforms:

POST /v1/analytics/sync?platform=tiktok

Triggers a background sync of analytics data. Supports all tracked platforms: TikTok, YouTube, and Instagram.

Params:

• platform (optional): tiktok, youtube, or instagram — sync only one platform. Omit to sync all.

Returns:

{
  "triggered": [
    { "platform": "tiktok", "runId": "run_..." },
    { "platform": "youtube", "runId": "run_..." },
    { "platform": "instagram", "runId": "run_..." }
  ]
}

Get single analytics record:

GET /v1/analytics/<analytics_id>

MCP Integration

Post Bridge has a native MCP (Model Context Protocol) server. If you're using Claude Desktop, ChatGPT, Cursor, or any MCP-compatible client, you can connect directly without this skill.

Claude Desktop: One-click connect at post-bridge.com/mcp

Claude Code / Cursor / Other MCP clients — add to your MCP config:

{
  "mcpServers": {
    "post-bridge": {
      "type": "streamable-http",
      "url": "https://mcp.post-bridge.com/mcp"
    }
  }
}

MCP Tools available (11 tools):

MCP tools accept media_urls (public URLs) — the server downloads and uploads them automatically. No need to manually upload media when using MCP.

Platform Configurations

Pass inside platform_configurations object on post creation, or use --platform-config with the CLI:

TikTok:

• draft: true — save as draft (publish manually on TikTok with trending sound)
• video_cover_timestamp_ms: 3000 — cover thumbnail at 3 seconds
• is_aigc: true — label as AI-generated content

Instagram:

• video_cover_timestamp_ms: 3000 — cover thumbnail
• is_trial_reel: true — trial reel mode (needs 1000+ followers)
• trial_graduation: "SS_PERFORMANCE" — auto-graduate based on performance

YouTube:

• video_cover_timestamp_ms: 3000 — cover thumbnail
• title: "My Short Title" — override post title

Twitter/X:

• caption: "override caption" — platform-specific caption

Pinterest:

• title: "Pin Title" — pin title
• link: "https://..." — destination URL
• board_ids: ["board_id"] — target boards

All platforms support caption and media overrides for per-platform customization.

Recommended Workflow for Video Content

1. Store videos in a local folder
2. Extract a frame with ffmpeg to read any text overlays: ffmpeg -i video.mp4 -ss 00:00:04 -frames:v 1 frame.jpg -y
3. Write caption based on video content + hashtags
4. Upload → create post → schedule or post instantly
5. Move posted videos to a posted/ subfolder to avoid duplicates
6. Set a cron to check post status 5 mins after scheduled time
7. Track performance by checking post results or analytics

Automation Guidelines

When automating posts, follow these rules to keep accounts in good standing:

• No duplicate content across multiple accounts on the same platform
• No unsolicited automated replies — only post original content or when explicitly requested
• No trending manipulation — don't mass-post about trending topics across accounts
• No fake engagement — don't automate likes, follows, or comments
• Respect rate limits — the API has rate limits, don't spam requests
• Use draft mode for review — when in doubt, use is_draft: true or TikTok's draft: true so the user can review before publishing

Publishing confirmation: Unless the user explicitly asks to "post now" or "publish immediately", always confirm before posting. Creating a draft is safe; posting is irreversible and goes live instantly.

Platform Names

Use these exact names for platform filtering and configurations:

• instagram — Instagram (Reels, Stories, Feed)
• tiktok — TikTok
• youtube — YouTube (Shorts)
• twitter — X (formerly Twitter)
• linkedin — LinkedIn
• facebook — Facebook
• pinterest — Pinterest
• threads — Threads
• bluesky — Bluesky

Tips

• Post to multiple platforms simultaneously by including multiple account IDs
• Stagger posts throughout the day (e.g. 9am + 3pm) for better reach
• Use scheduled_at to pre-schedule batches — Post Bridge handles the timing
• Use use_queue: true to auto-schedule posts to the user's next available queue slot using their saved timezone — no need to pick a time manually
• TikTok draft mode lets you add trending sounds manually before publishing
• Keep hashtags to 4-5 per post for best engagement
• Check results after posting to see per-platform success/failure
• Use analytics:sync to refresh data before checking analytics
• Monitor what works and iterate on captions/formats
• Use --draft flag when testing to avoid accidental publishing
• Character limits vary by platform — keep captions concise for X (280 chars)