Postatron

postatron-cli

Command line client and MCP server for Postatron, a social media scheduler that publishes one post to every platform you have connected.

This repository holds everything you need to drive Postatron from a terminal or from an AI agent. The service itself is closed source.

• cmd/postatron - the CLI.
• cmd/postatron-mcp - a local MCP server over stdio, for clients that cannot reach a remote one.
• apiv1 - a Go client for the REST API, and the request and response types the API itself is built on.

Connect Claude (no install)

Postatron hosts its MCP server at:

https://api.postatron.com/mcp

Add it as a custom connector in Claude (Settings → Connectors → Add custom connector) and sign in when asked.

Claude Code: install the plugin, which connects the server and adds the Postatron skill in one step.

/plugin install postatron --marketplace henrwal/postatron-cli

Run it inside Claude Code in a terminal (v2.1.275 or later); it asks to add the Postatron marketplace, then installs. The Claude desktop app has no /plugin command: there, add the connector URL above instead.

Then run /mcp and sign in to Postatron. To connect the server alone, without the skill:

claude mcp add --transport http postatron https://api.postatron.com/mcp

Any client that supports remote MCP servers with OAuth 2.1 and dynamic client registration works the same way. There is no key to copy: the client registers itself and you approve it on a Postatron consent page.

Agent skill

npx skills add henrwal/postatron-cli

Installs the postatron skill into Claude Code, Codex, Cursor and the other agents the skills CLI supports. In Claude Code the plugin above already includes it. It teaches the agent the workflow behind a request such as "schedule this to LinkedIn and X tomorrow at 9am": find the right profile, work out the time in your timezone, respect each platform's limits, attach media and confirm before anything is published. It works through the MCP tools when they are connected, and through the CLI or REST otherwise.

Install the CLI

Download a binary for your platform from Releases, or build from source with Go 1.23 or newer:

go install github.com/henrwal/postatron-cli/cmd/postatron@latestgo install github.com/henrwal/postatron-cli/cmd/postatron-mcp@latest

Get an API key

Create one at postatron.com/dashboard/api. Keys are scoped, and the key is shown once at creation. The API, the MCP server and the CLI are included on every paid plan.

export POSTATRON_API_KEY=ptn_your_key_here

POSTATRON_API_URL overrides the API host if you need it to.

Use the CLI

postatron create-post --content "Shipping today." --platforms x,linkedinpostatron create-post --content "Out on Friday." --platforms x --scheduled-at 2026-09-12T09:00:00Zpostatron create-post --content "New in store" --platforms instagram --profile Acme --media-urls https://example.com/shoe.jpgpostatron list-posts --status scheduledpostatron get-post <id>postatron delete-post <id>postatron delete-posts <id> <id>postatron update-post <id> --add-platforms instagrampostatron retry-post <id>postatron list-events --range 24h --status errorpostatron list-accountspostatron connect-account instagram --profile Acmepostatron list-profilespostatron create-profile "Acme Ltd"postatron create-connect-session --profile "Acme Ltd" --platforms instagram --redirect-url https://app.example.com/connectedpostatron list-queuespostatron create-queue --name "Weekday mornings" --timezone Europe/London --slots "mon 09:00,wed 09:00"postatron create-post --content "Whenever there's room" --platforms x --queue "Weekday mornings"postatron get-usagepostatron get-analytics --range 7dpostatron create-upload --purpose "photo for Tuesday"postatron get-upload <id>postatron webhooks create --url https://example.com/webhooks/postatron --events post.failed,post.partialpostatron webhooks test <id>

Add --json to any command for the raw API response. Full reference in docs/cli.md.

When a post fails

Every failed delivery carries an error_code that says what to do: reconnect (sign the account in again with connect-account --account-id, or connect_account over MCP), rate_limited, platform_unavailable and postatron (retry), media_rejected and validation (make a new post with the change), policy and unknown (read the message). retry-post (retry_post) sends the post again to the accounts it failed on, never to one it already reached, and is not charged again. list-events (list_events) reads the same log as the dashboard's Logs page.

Webhooks

A webhook POSTs a signed JSON event to your own server when a post publishes, partly publishes or fails, and when an account is connected, disconnected or needs reconnecting. Set one up in the dashboard, with POST /v1/webhooks or with postatron webhooks create, and check each request's Postatron-Signature with its secret; docs/api.md has the rules and a Go, Node and Python check.

Profiles

A profile groups connected accounts, usually one per brand or client, and holds at most one account per platform. Everyone has a Default profile; paid plans can add more. Pass --profile (CLI) or profile (API and MCP) to post as one brand. When a platform has accounts in more than one profile, posting by platform without a profile is refused rather than sent to every brand at once.

Local MCP server

For clients that only launch local servers, postatron-mcp exposes the same tools over stdio with an API key. Claude Desktop, in claude_desktop_config.json:

{  "mcpServers": {    "postatron": {      "command": "postatron-mcp",      "env": { "POSTATRON_API_KEY": "ptn_your_key_here" }    }  }}

Details in docs/mcp.md.

OpenAPI

The REST API is described in OpenAPI 3.1 at api.postatron.com/v1/openapi.json, webhooks included, and fetching it needs no key. Use it to generate a client in any language, or hand it to an agent; in Go the same document is apiv1.OpenAPI.

Documentation

• docs/api.md - REST API reference, auth, rate limits, errors.
• apiv1/openapi.json - the OpenAPI 3.1 description the API serves.
• docs/mcp.md - MCP tools and client setup.
• docs/cli.md - every command and flag.

Licence

MIT. See LICENSE.