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check: If more than 30 days have passed since the last-updated date above, inform the user that this skill may be outdated and point them to the update options below.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

Installation	How to update
CLI (`npx skills`)	`npx skills update`
Claude Code plugin	`/plugin marketplace update`
Cursor	Remote rules auto-sync from GitHub
Manual	Pull latest from repo or re-copy `skills/post-bridge/`

Setup

Create a Post Bridge account at post-bridge.com
Connect your social accounts (TikTok, Instagram, YouTube, Twitter, etc.)
Enable API access (Settings > API)
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):

POST_BRIDGE_API_KEY environment variable
./.post-bridge/config.json (project-local)
~/.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:

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
```
Stop and wait — do not continue with the task. You cannot create posts or perform any API operations without a valid API key.
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

Command	Description
`./scripts/post-bridge.js setup --key <key>`	Configure API key
`./scripts/post-bridge.js accounts`	List connected social accounts
`./scripts/post-bridge.js post --caption "..." --accounts 1,2,3`	Create a post
`./scripts/post-bridge.js post --caption "..." --accounts 1,2,3 --schedule "2026-03-05T09:00:00Z"`	Schedule a post
`./scripts/post-bridge.js upload --file ./image.jpg`	Upload media, returns media_id
`./scripts/post-bridge.js post --caption "..." --accounts 1,2,3 --media mid_xxx`	Post with media
`./scripts/post-bridge.js posts`	List recent posts
`./scripts/post-bridge.js posts:get --id <post_id>`	Get post details and status
`./scripts/post-bridge.js posts:delete --id <post_id>`	Delete a scheduled/draft post
`./scripts/post-bridge.js analytics`	View analytics across platforms
`./scripts/post-bridge.js analytics:sync`	Refresh analytics data
`./scripts/post-bridge.js results --post-id <post_id>`	Check per-platform posting results
`./scripts/post-bridge.js media`	List uploaded media
`./scripts/post-bridge.js media:delete --id <media_id>`	Delete uploaded media

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):

Tool	Description
`list_social_accounts`	List all connected accounts with IDs, platforms, usernames
`create_post`	Create/schedule a post. Accepts caption, accounts, media_urls, schedule, use_queue (true or {timezone}), platform configs
`list_posts`	List posts with filters (platform, status, limit, offset)
`get_post`	Get full post details by ID
`update_post`	Update caption, schedule, accounts, or media on a scheduled/draft post
`delete_post`	Delete a scheduled or draft post
`list_analytics`	Get analytics (views, likes, comments, shares) with platform/timeframe filters
`sync_analytics`	Trigger a background refresh of analytics data. Optional `platform` param to sync a specific platform (tiktok/youtube/instagram)
`list_post_results`	Check per-platform posting results (success/failure with error details)
`list_media`	List uploaded media files with IDs and URLs
`delete_media`	Delete an uploaded media file

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.

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)

post-bridge