PostLake

Publish, schedule and read analytics across every major social network from one MCP server.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Whoami: Confirm which PostLake account this API key belongs to and which platforms are supported.
  • Get Platform Capabilities: Machine-readable capabilities per platform: character limits, media rules (required/video-only/max images/formats/sizes), whether publishing is async, and EVERY platformOpti
  • Get Publish Info: Live creator-level publish constraints for one connected account (TikTok: available privacy options, whether comments/duet/stitch are allowed, max video duration for this creator). U

What data it sees

Do you need an account

No: the server works without sign-in

Publish, schedule and read analytics across every major social network from one MCP server. Hosted, OAuth, 15 tools, one normalised response shape.

How to connect

How to connect PostLake to Claude

The server address to paste into Claude settings:

https://socials--postlake.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect PostLake to ChatGPT

The server address to paste into ChatGPT settings:

https://socials--postlake.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect PostLake to Cursor

The server address to paste into Cursor settings:

https://socials--postlake.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (15)

Raw names from tools/list. Only developers need these.

whoamiConfirm which PostLake account this API key belongs to and which platforms are supported.
get_platform_capabilitiesMachine-readable capabilities per platform: character limits, media rules (required/video-only/max images/formats/sizes), whether publishing is async, and EVERY platformOptions field with its valid values. Call this before create_post to construct a valid post. Omit `platform` for all platforms.
get_publish_infoLive creator-level publish constraints for one connected account (TikTok: available privacy options, whether comments/duet/stitch are allowed, max video duration for this creator). Use it to pick a valid privacyLevel before posting to TikTok.
validate_postDry-run a post WITHOUT publishing: runs the exact validation create_post would run (media rules, per-platform character limits, option values) and returns per-target errors and warnings. Free — call it before create_post.
upload_mediaUpload media from a public URL so it can be attached to posts. PostLake fetches the URL server-side, validates type/size (images ≤20MB: jpeg/png/webp/gif; videos ≤200MB: mp4/mov/webm) and returns a med_… id to pass as `media` in create_post.
list_social_accountsList the social accounts the caller has connected (handles + ids). Use the returned ids when creating a post.
list_account_targetsList the postable destinations inside a connected account (Pinterest boards, Facebook Page). Returns {id,name}; pass the id back in platformOptions (e.g. boardId).
create_postPublish (or schedule) one post to one or more connected accounts. Say WHERE to post the simple way — `profile` (a profile name), optionally narrowed with `platforms` — or the precise way, explicit `accounts` ids. Provide at least one. Returns a normalised result with per-platform status and live URLs. Omit scheduledAt to publish now.
get_postFetch a previously created post by its id (post_…), including per-platform status.
list_postsList the caller's posts (most recent first), each with per-platform status. Pass state='scheduled' to see the upcoming schedule. Cursor pagination: pass `limit` (default 50, max 100) and `cursor` (the previous response's `nextCursor`).
edit_postEdit a scheduled post's text and/or fire time before it fires. Only 'scheduled' posts can be edited; the new time must be in the future.
cancel_postCancel a scheduled post before it fires. Only posts still in 'scheduled' state can be cancelled.
get_post_analyticsGet normalised performance metrics for one post — per-platform plus totals (impressions, reach, likes, comments, shares, saves, clicks, followers). Metrics are null for platforms whose analytics aren't wired yet.
get_analyticsCross-platform analytics over a period — decisions, not just measurements. One normalised response with totals, a per-platform breakdown with engagement RATES (the honest cross-platform comparison), precomputed derived metrics (engagement rate, CTR — never derive them yourself), a daily timeseries, top posts, best posting times from this account's own history, structured recommendations[] ({action, reason, confidence}) for what to post next, and a one-line summary. Fields are null when there's no real data behind them (never fabricated). periodDays defaults to 30.
list_profilesList the caller's profiles — named buckets (e.g. a brand or client) that own connected accounts.