Postiz MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Postiz MCP or direct API to schedule posts, manage content calendars, analyze engagement, and capture leads through natural language.

Postiz logoPostiz
Api Key

Postiz is an agentic social media scheduling tool for managing and growing your online presence. It helps you schedule posts, capture leads, and build an audience—all powered by AI.

14 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
Postiz
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TOOLS

Supported Tools

Every Postiz action and event your agent gets out of the box.

Ask postiz

Ask agent 'postiz' a question.

Generateimagetool

Generate image to use in a post, in case the user specified a platform that requires attachment and attachment was not provided, ask if they want to generate a picture of a video.

Generatevideooptions

All the options to generate videos, some tools might require another call to generateVideoFunction

Generatevideotool

Generate video to use in a post, in case the user specified a platform that requires attachment and attachment was not provided, ask if they want to generate a picture of a video.

Grouplist

This tool lists the available groups (customers).

Integrationlist

This tool list available integrations to schedule posts to.

Integrationscheduleposttool

Use this when the user wants to create a draft, scheduled, or immediate social media post on their connected channels, based on the integrationSchema tool.

Integrationschema

Everytime we want to schedule a social media post, we need to understand the schema of the integration.

Postsettingstool

Update the provider settings of an existing post (scheduled or draft) that was NOT published yet.

Postslisttool

List the organization's posts scheduled to be published between two dates (the same data as the "List Posts" API endpoint).

Triggertool

Use this to call a provider helper function (a methodName from the integrationSchema callable tools) that fetches provider-specific data needed for settings, like ids or search results.

Uploadfromurltool

Upload a remote image or video into the media library from a public URL.

Videofunctiontool

Sometimes when we want to generate videos we might need to get some additional information like voice_id, etc

Videostatustool

Check the status of a video generation started with 'generateVideoTool', using the jobId it returned.

SETUP GUIDE

Connect Postiz MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["postiz_mcp"],
  mcp: true,
});
Create a session scoped to Postiz and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Schedule a new Instagram post for tomorrow at 9am about our summer sale.",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Postiz request
SETUP GUIDE

Connect Postiz API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["postiz_mcp"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Postiz
3

Run Postiz tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Schedule a new Instagram post for tomorrow at 9am about our summer sale." }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Postiz tool calls through the session, and print the final answer

Why Use Composio?

AI Native Postiz Integration

  • Supports both Postiz MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Postiz data

Managed Auth

  • Built-in API key handling with secure storage
  • Central place to manage, scope, and revoke Postiz access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Postiz
  • Scoped, least privilege access to Postiz resources
  • Full audit trail of agent actions to support review and compliance

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY
FAQ

Frequently asked questions

Yes, Postiz requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Postiz connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Postiz account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Postiz actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Postiz at any time.

When you connect a Postiz account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Postiz as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Postiz. If Postiz lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Postiz at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Postiz connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Postiz rejects the old key. Create a new key in Postiz and reconnect the account from the Composio dashboard or by asking your agent to reconnect Postiz. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Postiz use. Paid plans add higher limits and team features. Your Postiz plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Postiz accounts).

With Composio, you connect Postiz once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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