How do I get my Substack API token?

Log in to your Substack publication at **yourdomain.substack.com**. Navigate to **Settings** from the left sidebar. Look for the **Publication API** or **Developer** section. Generate an API token and copy it. Paste it into the configuration field below. Note: Substack's API is currently in limited availability — check Substack's developer page for the latest access information.

Can I draft and schedule newsletter posts?

Yes. Your AI agent can create draft posts with title, body content, subtitle, and metadata. You can then schedule them for a specific date and time — managing your entire editorial calendar conversationally.

Can I track how many subscribers I gained this month?

Yes. Ask your AI agent for subscriber growth metrics and get total subscribers, new subscribers this month, churn rate, and free vs. paid subscriber breakdown.

Does this work with paid Substack publications?

Yes. The integration supports both free and paid publications. You can manage paywalled content, check paid subscriber counts, and analyze revenue metrics through your AI agent.

Substack MCP Server for OpenAI Agents SDK 6 tools — connect in under 2 minutes

Name: Substack
Availability: InStock
Author: Vinkius

openai.github.io/openai-agents-python/mcp

Built by Vinkius GDPR 6 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect Substack through Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails. no manual schema definitions required.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerStreamableHttp

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MCPServerStreamableHttp(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as mcp_server:

        agent = Agent(
            name="Substack Assistant",
            instructions=(
                "You help users interact with Substack. "
                "You have access to 6 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from Substack"
        )
        print(result.final_output)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Substack MCP Server

Connect Substack to your AI agent and manage your newsletter publication conversationally.

The OpenAI Agents SDK auto-discovers all 6 tools from Substack through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries Substack, another analyzes results, and a third generates reports, all orchestrated through Vinkius.

What you can do

Post Management — List, create, and manage newsletter posts including drafts, published, and scheduled content.
Subscriber Insights — Query subscriber counts, growth trends, and audience demographics.
Publication Settings — Access and modify publication metadata, categories, and custom domains.
Content Analytics — Track open rates, click rates, and engagement metrics per post.

The Substack MCP Server exposes 6 tools through the Vinkius. Connect it to OpenAI Agents SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Substack to OpenAI Agents SDK via MCP

Follow these steps to integrate the Substack MCP Server with OpenAI Agents SDK.

Install the SDK

Run pip install openai-agents in your Python environment

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com

Run the script

Save the code above and run it: python agent.py

Explore tools

The agent will automatically discover 6 tools from Substack

Why Use OpenAI Agents SDK with the Substack MCP Server

OpenAI Agents SDK provides unique advantages when paired with Substack through the Model Context Protocol.

Native MCP integration via `MCPServerSse`, pass the URL and the SDK auto-discovers all tools with full type safety

Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure

Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate

First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output

Substack + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the Substack MCP Server delivers measurable value.

Automated workflows: build agents that query Substack, process the data, and trigger follow-up actions autonomously

Multi-agent orchestration: create specialist agents. one queries Substack, another analyzes results, a third generates reports

Data enrichment pipelines: stream data through Substack tools and transform it with OpenAI models in a single async loop

Customer support bots: agents query Substack to resolve tickets, look up records, and update statuses without human intervention

Substack MCP Tools for OpenAI Agents SDK (6)

These 6 tools become available when you connect Substack to OpenAI Agents SDK via MCP:

get_leaderboard

Get leaderboard

get_post

Get post

get_post_stats

Get post stats

get_publication_info

Get publication info

list_posts

List recent posts

list_subscribers

List subscribers

Example Prompts for Substack in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with Substack immediately.

"How many subscribers does my Substack have?"

"Draft a new newsletter post titled 'The Future of AI in Sales'."

"What was the open rate on my last newsletter?"

Troubleshooting Substack MCP Server with OpenAI Agents SDK

Common issues when connecting Substack to OpenAI Agents SDK through the Vinkius, and how to resolve them.

MCPServerStreamableHttp not found

Ensure you have the latest version: pip install --upgrade openai-agents

Agent not calling tools

Make sure your prompt explicitly references the task the tools can help with.

Substack + OpenAI Agents SDK FAQ

Common questions about integrating Substack MCP Server with OpenAI Agents SDK.

How does the OpenAI Agents SDK connect to MCP?

Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.