postiz-mcp

Canonical Postiz client for any MCP-compatible client. Full coverage of the Postiz public API (integrations, posts, uploads, analytics, video) with env-gated writes, confirm-required deletes, and a built-in rate-limit guard.

Ships as a stdio MCP server and a first-class OpenClaw native plugin from the same package.

Why

If you self-host Postiz and want Claude / Codex / OpenClaw / Hermes / any MCP client to interact with it, this gives you a typed, tested, single-purpose tool surface instead of hand-rolled HTTP calls in every workflow.

Warnings before you wire this up

• Postiz writes are public side effects. A successful postiz_create_post with type: "now" (or a near-term schedule) lands on real social accounts. Once published, posts can be deleted from Postiz but the platform-side post stays live — Postiz cannot recall it.
• The Postiz public API is rate-limited at 30 requests/hour by default. This server tracks the limit locally and refuses to send when the budget is exhausted. Override with POSTIZ_RATE_LIMIT_PER_HOUR if your Postiz instance is configured higher.
• Writes and deletes are gated off by default. Reads always work. To enable writes you must explicitly set POSTIZ_ENABLE_WRITE=true. To enable deletes you must additionally set POSTIZ_ENABLE_DELETE=true AND pass confirm: true in the tool call.

Tools

Reads (always on)

• postiz_list_integrations — list connected channels
• postiz_check_integration — verify API key
• postiz_find_next_slot — next free posting slot for a channel
• postiz_list_posts — posts in a date window
• postiz_get_missing_content — recover platform content for a Postiz post with a missing releaseId
• postiz_list_notifications — Postiz UI notifications
• postiz_get_platform_analytics — followers / impressions / engagement
• postiz_get_post_analytics — likes / comments / shares
• postiz_list_voices — AI video voice catalog
• postiz_get_provider_settings_schema — per-provider settings schema (X, LinkedIn, Reddit, etc.) bundled at build time

Writes (require POSTIZ_ENABLE_WRITE=true)

• postiz_create_post — schedule / publish-now / draft
• postiz_connect_integration — generate OAuth URL for a new channel
• postiz_update_post_status — toggle DRAFT ↔ QUEUE
• postiz_update_post_release_id — reattach a Postiz post to its platform-side release
• postiz_upload_file — multipart upload from local file or base64
• postiz_upload_from_url — server-side fetch
• postiz_generate_video — AI video generation

Deletes (require POSTIZ_ENABLE_WRITE=true + POSTIZ_ENABLE_DELETE=true + confirm: true)

• postiz_delete_post — cascades to whole group
• postiz_delete_post_group — delete every post in a cross-post group
• postiz_delete_integration — disconnect channel + all its scheduled posts

Install

npm install -g postiz-mcp

Or from source:

git clone https://github.com/solomonneas/postiz-mcp.git
cd postiz-mcp
npm install
npm run build

Configuration

Set these environment variables in your MCP client config:

Getting an API key

1. Log into Postiz as an admin
2. Settings → Public API → Generate API Key
3. Copy the value (starts with pos_ or is a raw UUID depending on your Postiz version)

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "postiz": {
      "command": "postiz-mcp",
      "env": {
        "POSTIZ_URL": "http://localhost:5000",
        "POSTIZ_API_KEY": "your-api-key-here",
        "POSTIZ_ENABLE_WRITE": "true",
        "POSTIZ_ENABLE_DELETE": "false"
      }
    }
  }
}

Claude Code

claude mcp add postiz \
  --env POSTIZ_URL=http://localhost:5000 \
  --env POSTIZ_API_KEY=your-api-key-here \
  --env POSTIZ_ENABLE_WRITE=true \
  -- postiz-mcp

Add --scope user to make it available from any directory instead of only the current project.

OpenClaw

postiz-mcp is also an OpenClaw native plugin. From a source checkout:

openclaw plugin add /absolute/path/to/postiz-mcp \
  --config '{
    "baseUrl": "http://localhost:5000",
    "apiKeyEnv": "POSTIZ_API_KEY",
    "enableWrite": true,
    "enableDelete": false
  }'

Then export the API key and restart the gateway:

export POSTIZ_API_KEY=your-api-key-here
systemctl --user restart openclaw-gateway
openclaw plugin list   # confirm "postiz" is enabled

You can also run it as a regular MCP server under OpenClaw:

openclaw mcp set postiz '{
  "command": "postiz-mcp",
  "env": {
    "POSTIZ_URL": "http://localhost:5000",
    "POSTIZ_API_KEY": "your-api-key-here",
    "POSTIZ_ENABLE_WRITE": "true"
  }
}'

Hermes Agent

Hermes Agent reads MCP config from ~/.hermes/config.yaml under mcp_servers. Add an entry:

mcp_servers:
  postiz:
    command: "postiz-mcp"
    env:
      POSTIZ_URL: "http://localhost:5000"
      POSTIZ_API_KEY: "your-api-key-here"
      POSTIZ_ENABLE_WRITE: "true"

Or from a source checkout:

mcp_servers:
  postiz:
    command: "node"
    args: ["/absolute/path/to/postiz-mcp/dist/mcp-server.js"]
    env:
      POSTIZ_URL: "http://localhost:5000"
      POSTIZ_API_KEY: "your-api-key-here"
      POSTIZ_ENABLE_WRITE: "true"

Then reload MCP from inside a Hermes session:

/reload-mcp

Codex CLI

Codex CLI registers MCP servers via codex mcp add:

codex mcp add postiz \
  --env POSTIZ_URL=http://localhost:5000 \
  --env POSTIZ_API_KEY=your-api-key-here \
  --env POSTIZ_ENABLE_WRITE=true \
  -- postiz-mcp

Or from a source checkout:

codex mcp add postiz \
  --env POSTIZ_URL=http://localhost:5000 \
  --env POSTIZ_API_KEY=your-api-key-here \
  --env POSTIZ_ENABLE_WRITE=true \
  -- node /absolute/path/to/postiz-mcp/dist/mcp-server.js

Codex writes the entry to ~/.codex/config.toml under [mcp_servers.postiz]. Verify with:

codex mcp list

Postiz behind Cloudflare Access

If your Postiz is exposed via Cloudflare Tunnel + Access (e.g. https://postiz.example.com), generate a service token in the Cloudflare Zero Trust dashboard and add the env vars:

export POSTIZ_CF_ACCESS_CLIENT_ID=your-cf-id.access
export POSTIZ_CF_ACCESS_CLIENT_SECRET=your-cf-secret

The MCP server forwards them as CF-Access-Client-Id / CF-Access-Client-Secret on every request. If you forget them, you'll get a clear PostizCfAccessChallengeError instead of a confusing HTML response.

Example prompts

• "List the integrations on my Postiz."
• "Schedule a Bluesky post for tomorrow 9am: 'Just shipped postiz-mcp.'"
• "What's the next available LinkedIn slot? Schedule this 4-tweet thread for that time on X with replies set to verified-only."
• "What posted last week and how did the X post on Tuesday do?"
• "Show me the X provider settings schema so I can construct a thread payload."

Provider settings schemas

postiz_get_provider_settings_schema returns the bundled per-provider settings reference (parsed from docs.postiz.com/public-api/providers/{slug}.md). Use it before postiz_create_post when you need provider-specific fields like X's who_can_reply_post or LinkedIn's audience.

The schemas are refreshed monthly by a GitHub Actions workflow that opens a PR if Postiz updated any provider doc. To refresh manually:

npm run refresh-schemas

Development

npm install
npm run typecheck
npm test
npm run build

License

MIT