[Feature Request]: Expanded the capabilities of the MCP Server

[Drasek]

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Is your feature request related to a problem?

I am connecting my RAGFlow instance to my n8n server (i have several datasources (ragflow, supabase, etc.) and combine them there) and are getting errors from models that the input token limits are broken. So i looked into it to reduce input size from the MCP Server of RAGFlow. While i was at it i changed more stuff, for example i need the metadata from the documents in my flow.

Describe the feature you'd like

Expand the capabilities of the MCP Server of RAGFlow.

Describe implementation you've considered

I am on v0.19.1 full - so i can not provide a direct pull request because you added support for @click library in the last commits (not in a release till now) which breaks with codebase from the v0.19.1 - so i thought i could provide you my code (please remember i am a bloody amateuer) to look at and grab stuff from it to expand the capabilities of the MCP Server in the next releases.

Documentation, adoption, use case

- exposed lots of options to the MCP Client side (and reduced default number of results to 10), so modified the list_tools function heavily
- added lots of stuff to the answer data to the MCP Client, including metadata - so modified the retrieval function heavily

Its mainly those 2 functions + helper functions i changed.

Additional information

Added my server.py - (changed it to txt to be able to upload it) - yeah i know thats a pretty weird way for a feature request instead of a pull, but do not know how to do it else, as long as i am not going to a selfbuild nightly version.

server.txt

[ZhenhangTung]

Hi @Drasek . Appreciate your input. I'll just share our current designs as a preview to you:

1. MCP servers management

2. Agent can select MCP servers and tools that it can use

Just wait for 1 or 2 weeks and we will release our v0.20 version. (We're working very hard on it.)

Then we can discuss more based on our new release.

[Drasek]

Very cool preview, thank you for leting us look "under the hood" - i think you talk mainly about the mcp client inside ragflow (to connect to outside mcp servers), or? I did modify the mcp server of ragflow, so i can get a connection from a different system (in my case n8n) to ragflow and use it as just another datastore - so the other way around. Yeah i know ragflow got "flow" in its name, but i started with n8n and i have to get my head around the way the flows work here.

For another discussion, i couldn't get my head around to understand how i include other datasources into ragflow in n8n there is a supabase node, connect it and you retrieve data from it using a function you build in supabase - pretty simple (or at least to me), not sure how to replicate it here. But i wait for 0.20 for trying the flow in ragflow again.

[ZhenhangTung]

I did modify the mcp server of ragflow, so i can get a connection from a different system (in my case n8n) to ragflow and use it as just another datastore - so the other way around.

@yongtenglei pls check the code. And you're welcome to open a PR after the first round review.

For another discussion, i couldn't get my head around to understand how i include other datasources into ragflow in n8n there is a supabase node

You mean this kind of workflow?

We can connect to it via supabase's MCP server. I'll send you a demo video about it after we finish the MCP part and it could be a template that can be shared to the community in the near future.

If there is any Agent or workflow you want to build, feel free to share it and I'll have my team to see if we can build it for you.

[Drasek]

Very similar to your example:

The "MCP RAGFlow Client" is the connection to the ragflow mcp server. And i would love to watch a video how to connect supabase (or other db) with a mcp server to ragflow, long term solution i could get rid of n8n and build the hole thing in ragflow. I use a custom webapp and connect my n8n flows via http requests, so i can switch the "engine" runing in the background to ragflow later in the project.

My supabase db is similar to https://supabase.com/docs/guides/ai/langchain?database-method=sql this guide from supabase (small adjustments), so there is a function i can call in the supabase node in n8n to search through the data.

[yongtenglei]

Hi, @Drasek

I have integrated your code into the codebase and added you as a collaborator to my fork. Please feel free to modify any part of the code if you notice any issues or would like to make improvements. Or at least add some comments if you want. You can work directly on the feature/expand_mcp_cap branch.

Once you have done that, this PR will represent the work like we have worked together on this feature.

Cheers!

[WeiPeng977]

Hi @Drasek . Appreciate your input. I'll just share our current designs as a preview to you:

1. MCP servers management

2. Agent can select MCP servers and tools that it can use

Just wait for 1 or 2 weeks and we will release our v0.20 version. (We're working very hard on it.)

Then we can discuss more based on our new release.

@ZhenhangTung May I ask when the V0.20 version will be released? Can it be released this month?

[ZhenhangTung]

Hi @Drasek . Appreciate your input. I'll just share our current designs as a preview to you:

1. MCP servers management

2. Agent can select MCP servers and tools that it can use

Just wait for 1 or 2 weeks and we will release our v0.20 version. (We're working very hard on it.)

Then we can discuss more based on our new release.

@ZhenhangTung May I ask when the V0.20 version will be released? Can it be released this month?

@WeiPeng977 Expect to release v0.20 in this week.

[dataa2]

Hi @Drasek . Appreciate your input. I'll just share our current designs as a preview to you:

1. MCP servers management

2. Agent can select MCP servers and tools that it can use

Just wait for 1 or 2 weeks and we will release our v0.20 version. (We're working very hard on it.)

Then we can discuss more based on our new release.

@ZhenhangTung May I ask when the V0.20 version will be released? Can it be released this month?

@WeiPeng977 Expect to release v0.20 in this week.

Hi @ZhenhangTung, where can I see this UI of the MCP Server on v0.20? Thank you.

[ZhenhangTung]

Hi @dataa2 , it's under Profile -> MCP.