A hosted Reddit MCP server that lets Claude, ChatGPT, and any other MCP-compatible assistant run MediaFast's Reddit marketing tools for you, from inside a normal chat.
MediaFast's Reddit MCP server is a hosted server at https://api.mediafa.st/mcp that exposes MediaFast's Reddit marketing tools, subreddit discovery, post and comment drafting, and shadowban checking, to any AI assistant that speaks the Model Context Protocol. Connect it to Claude or ChatGPT with a MediaFast API key, and you can ask in plain language to "find subreddits for my product," "draft a Reddit post," or "check this account for a shadowban," and the assistant does it using your own MediaFast account.
You do not write code or run a server yourself. You create an API key in MediaFast's Settings, paste the server URL and key into your assistant's connector screen with Bearer authentication, and the connection is live. The same key and the same URL work in both Claude and ChatGPT, and because MCP is an open standard, other MCP-compatible clients such as Cursor can connect too.
Open standard, late 2024
The Model Context Protocol was introduced by Anthropic in November 2024 as an open way for AI assistants to connect to external tools and data.
ChatGPT added support
OpenAI adopted MCP for its own tools in early 2025 and later added custom MCP connector support inside ChatGPT itself.
One key, two assistants
The same MediaFast API key authenticates the same hosted server URL in both Claude and ChatGPT, no separate setup per assistant.
The Model Context Protocol, or MCP, is an open standard that Anthropic introduced in November 2024 to solve a specific problem: every AI assistant that wanted to connect to an outside tool, a database, a calendar, a codebase, or an app like Reddit, needed its own custom integration. MCP replaces that with one common interface. A tool builder writes one MCP server, and any MCP-compatible assistant can talk to it without a bespoke plugin for each one.
Since it launched, the standard has been adopted well beyond Anthropic's own products. OpenAI added MCP support to its tools and to ChatGPT, and other assistants and editors, including Cursor, followed the same standard. In late 2025, Anthropic donated MCP to the Agentic AI Foundation, a Linux Foundation project co-founded with OpenAI and other companies, which is a strong signal that MCP is becoming shared infrastructure rather than one vendor's format.
There are already open-source MCP servers built directly on the raw Reddit API. Those are useful for reading Reddit: pulling posts, comments, and subreddit metadata into an assistant's context. What they do not do is help you market on Reddit. They have no opinion on which subreddit fits your product, no way to draft a post that will not get auto-removed, and no idea whether your account is shadowbanned.
MediaFast's Reddit MCP server is different in scope. Instead of exposing raw Reddit reads, it exposes MediaFast's own Reddit marketing tools, the same subreddit discovery, post and comment drafting, and shadowban checking you would otherwise use from the MediaFast dashboard, and makes them callable from inside a chat with Claude or ChatGPT.
Once connected, your assistant can reach into MediaFast's Reddit marketing tools on your behalf. In practice, that covers the same actions MediaFast already offers in its dashboard, now reachable from a plain-language request instead of clicking through screens.
Subreddit discovery
Ask for subreddits that fit your product or niche and get back candidates worth posting or commenting in.
Post and comment drafting
Ask for a Reddit post or a comment reply for a specific subreddit or thread, drafted in a tone that fits the community rather than reading like an ad.
Shadowban checking
Ask whether a given Reddit account is shadowbanned before you invest more time posting from it.
Related Reddit marketing actions
Other MediaFast Reddit marketing capabilities are reachable the same way, so the assistant becomes a front end for the tools you already use, not a separate product.
Create an API key in Settings, paste it into Claude or ChatGPT, and start asking for subreddits, drafts, and shadowban checks in plain language.
The whole setup happens in settings screens, no code required. Here is the exact sequence.
Open Settings and find "API keys for MCP"
Log into your MediaFast dashboard and go to Settings. Look for the section called "API keys for MCP." This is where every key you create lives, along with a name, a last-used date, and a revoke button.
Create a key and copy it immediately
Give the key a name that tells you where it is going, for example "Claude Desktop" or "ChatGPT connector." Click create. The raw key is shown exactly once. Copy it now, because MediaFast will only ever show you the prefix after this point, never the full key again.
Add a custom connector in Claude
In Claude Desktop or on claude.ai, open connector settings and add a new custom connector. Paste the server URL below, then set the authentication method to Bearer and paste your API key as the token.
https://api.mediafa.st/mcpAdd a custom connector in ChatGPT
In ChatGPT, add a custom connector (or a custom MCP connector, depending on your plan and interface). Paste the exact same server URL and again set authentication to Bearer with your API key as the token. The same key works for both assistants, you do not need a second one.
https://api.mediafa.st/mcpAsk it to do something real
Once the connector shows as connected, ask a plain-language question in the chat, such as "find subreddits for my product" or "draft a Reddit post for r/SaaS." The assistant calls MediaFast's Reddit marketing tools on your behalf and acts on your own MediaFast account and plan.
Claude Desktop and claude.ai connectors both support Bearer authentication for custom connectors.
ChatGPT's custom connector settings use the same server URL and the same Bearer token, one key for both.
Because MCP is an open standard, other MCP-compatible clients such as Cursor can connect the same way.
Most connection problems trace back to one of these five slips. They are all avoidable and take seconds to get right the first time.
Do This
Copy the API key the moment it is generated, before doing anything else on the page.
Set the authentication type to Bearer in the connector settings.
Use the exact server URL, https://api.mediafa.st/mcp, with no trailing text or typos.
Give each key a name that says where it is used, like "Claude Desktop" or "Work ChatGPT."
Revoke a key the moment you stop using an assistant or suspect it leaked.
Not This
Click away from the "shown once" screen before copying the key, then have to revoke and recreate it.
Paste the key into a "basic auth" or "API key header" field that the assistant does not expect.
Copy the URL from a screenshot or an old note and introduce an extra character or missing slash.
Leave every key with a generic name, then have no idea which one to revoke later.
Leave old keys active indefinitely because revoking feels like extra effort.
Once the connector shows as active, these are the kinds of plain-language requests that trigger MediaFast's Reddit marketing tools.
"Find subreddits where people are already talking about problems my product solves."
"Draft a Reddit post introducing my SaaS to r/SaaS without sounding like an ad."
"Check this Reddit account for a shadowban before I post anything else from it."
"Write a comment reply for this thread that adds value before I mention my product."
"Look at my last few posts and tell me if my self-promotion ratio is safe."
"Suggest three subreddits I have not tried yet that fit my niche."
Solo founders
You are the whole marketing team. Instead of opening a dashboard, switching tabs, and copy-pasting between tools, you stay inside the same Claude or ChatGPT window you already use for everything else and just ask for the next Reddit move.
Growth marketers
Running Reddit for more than one product or client gets messy fast. An assistant with the MCP server connected can pull subreddit ideas, draft posts, and sanity-check accounts across clients without you rebuilding the same workflow in a spreadsheet each time.
Indie hackers shipping fast
When you are heads down building, the fastest path to a Reddit launch post is asking your assistant to draft one while you keep coding, then reviewing it before you hit submit yourself.
Agencies and consultants
If you manage Reddit presence for multiple clients, a single hosted connector means you are not maintaining separate scripts or API integrations per client account. Each client can hold their own MediaFast API key scoped to their own plan.
Across all of these, the pattern is the same. Tools like MediaFast package the Reddit marketing actions you would otherwise perform by hand into a single hosted server, so connecting an assistant is a settings change, not a development project.
All three paths can get you Reddit marketing activity. They differ in how much setup they demand and what they actually understand about marketing safely.
An API key is functionally a password: whoever holds it can act on your MediaFast account and plan through the MCP server. MediaFast's key handling follows a few rules to keep that safe.
Shown once
The raw key is displayed only at the moment you create it. After that, MediaFast shows just a prefix, never the full key again, so copy it immediately.
Scoped to your plan
A key acts only on your own MediaFast account and plan. It does not grant access beyond what you could already do from the dashboard yourself.
Revocable anytime
If a key is exposed, or you stop using an assistant, revoke it from Settings. Revoked keys stop working immediately.
Limited active keys
You can hold a limited number of active keys at once, which keeps you from accumulating forgotten, unused keys with standing access.
No. MediaFast hosts the MCP server for you at https://api.mediafa.st/mcp. You only manage an API key from Settings, there is nothing to install or keep running on your side.
Yes. The same key authenticates the same server URL in both. You do not need a separate key per assistant, though naming a key per assistant can make revoking easier later.
Go to Settings, find the key in the "API keys for MCP" list, and revoke it. A revoked key stops working immediately, and you can create a fresh one to replace it.
No, it complements it. The MCP server exposes the same Reddit marketing tools you already have in the dashboard, it just adds a second way to reach them, through a chat with Claude or ChatGPT.
More of the research, drafting, and decision-making around marketing now happens inside a chat window rather than a dashboard. An assistant that can only read and suggest is less useful than one that can also act, and MCP is the mechanism that lets it act on real tools instead of just describing what you should do next.
There is also a second-order effect worth naming: the same assistants people ask "what should I do" are increasingly the ones people ask "do this for me." A Reddit MCP server puts your Reddit marketing workflow directly in that loop, which matters as more discovery and research shifts from search engines to AI assistants, the trend often described as generative engine optimization, or GEO.
If you are already thinking about how your brand shows up when people ask ChatGPT or Perplexity for recommendations, connecting your Reddit marketing tools to those same assistants through MCP is a natural extension of that work, not a separate project. See Reddit for GEO and how to get cited by ChatGPT for the broader picture.
Six terms worth knowing before you connect an assistant to any MCP server.
Model Context Protocol. An open standard, originally introduced by Anthropic in November 2024, that lets AI assistants connect to external tools and data sources through a common interface instead of a custom integration per app.
A service that exposes a set of tools or data to any MCP-compatible assistant. The assistant discovers what a server can do and calls it when a request needs that capability.
The AI assistant or app that connects to an MCP server, for example Claude Desktop, claude.ai, ChatGPT with a custom connector, or an MCP-compatible editor like Cursor.
An authentication method where a single secret string, in this case your MediaFast API key, is sent with each request to prove who is calling. Whoever holds the token can act as you, so it is treated like a password.
The settings screen inside an MCP client where you register a new server by pasting its URL and choosing how to authenticate.
An MCP server that the product runs and maintains for you, as opposed to an open-source server you would have to run yourself. MediaFast's Reddit MCP server is hosted, so there is nothing to install or keep running.
The same Reddit marketing tools the MCP server exposes are also available directly on MediaFast.
Common questions about connecting MediaFast to Claude and ChatGPT.
A Reddit MCP server is a service that exposes Reddit-related capabilities to an AI assistant using the Model Context Protocol, an open standard for connecting assistants to external tools. MediaFast's version is a hosted server at https://api.mediafa.st/mcp that exposes MediaFast's own Reddit marketing tools, such as subreddit discovery, post drafting, and shadowban checking, so you can trigger them from inside Claude or ChatGPT instead of switching to a dashboard.
Yes. The same server URL, https://api.mediafa.st/mcp, and the same API key work in both. In Claude Desktop or claude.ai you add it as a custom connector with Bearer authentication. In ChatGPT you add it as a custom connector the same way. Because it follows the open MCP standard, other MCP-compatible clients such as Cursor can connect too.
In your MediaFast dashboard, go to Settings and find the "API keys for MCP" section. Create a key there. It is shown to you exactly once, so copy it right away. You can hold a limited number of active keys at a time, and you can revoke any key immediately from that same screen.
Your API key acts on your own MediaFast account and plan, nothing more. It is a secret, so treat it like a password: do not share it or paste it anywhere besides your assistant's connector settings. If a key is ever exposed or you stop using an assistant, revoke it from Settings and it stops working immediately.
Anything that maps to MediaFast's Reddit marketing tools, phrased in plain language. Common examples are finding subreddits for a product, drafting a Reddit post or comment, and checking whether a Reddit account is shadowbanned. The assistant translates your request into the right tool call behind the scenes.
No. Setup is entirely inside settings screens: create a key in MediaFast, then paste the server URL and the key into your assistant's connector settings with Bearer authentication selected. There is no server to install, run, or maintain.