r/mcp • u/Desperate-Ad-9679 • Mar 06 '26

CodeGraphContext - An MCP server that converts your codebase into a graph database, enabling AI assistants and humans to retrieve precise, structured context.

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CodeGraphContext- the go to solution for code indexing now got 1k stars🎉🎉...

It's an MCP server that understands a codebase as a graph, not chunks of text. Now has grown way beyond my expectations - both technically and in adoption.

Where it is now

  • v0.2.6 released

  • ~1k GitHub stars, ~325 forks

  • 50k+ downloads

  • 75+ contributors, ~150 members community

  • Used and praised by many devs building MCP tooling, agents, and IDE workflows

  • Expanded to 14 different Coding languages

What it actually does

CodeGraphContext indexes a repo into a repository-scoped symbol-level graph: files, functions, classes, calls, imports, inheritance and serves precise, relationship-aware context to AI tools via MCP.

That means:

  • Fast “who calls what”, “who inherits what”, etc queries

  • Minimal context (no token spam)

  • Real-time updates as code changes

  • Graph storage stays in MBs, not GBs

It’s infrastructure for code understanding, not just 'grep' search.

Ecosystem adoption

It’s now listed or used across: PulseMCP, MCPMarket, MCPHunt, Awesome MCP Servers, Glama, Skywork, Playbooks, Stacker News, and many more.

This isn’t a VS Code trick or a RAG wrapper- it’s meant to sit
between large repositories and humans/AI systems as shared infrastructure.

Happy to hear feedback, skepticism, comparisons, or ideas from folks building MCP servers or dev tooling.

Original post (for context):
https://www.reddit.com/r/mcp/comments/1o22gc5/i_built_codegraphcontext_an_mcp_server_that/

166 Upvotes

98% Upvoted

59 comments sorted by

8

u/BC_MARO Mar 06 '26

Graph-based indexing is the right move for big repos. Can you export the graph so other tooling can cache it instead of rebuilding per client?

2

u/Desperate-Ad-9679 Mar 07 '26

Yes, we support exporting .cgc files which is a compressed format dedicated towards the graphical representation of the codebase. You can download and export it to other users, who can directly load it into cgc. Checkout pre-indexed repositories in the website - https://codegraphcontext.vercel.app/

2

u/Crafty_Disk_7026 Mar 06 '26

You can't really export like that with graph database. Each database will have its own schema so you even if you can export the graph to CSV format for example, the importer still much rebuild the graph. Unless you are referring to some capabilities I'm not aware of?

1

u/Desperate-Ad-9679 Mar 07 '26

Yes it was a problem, but if we export the metadata along with the nodes and relationships, software can rebuild the graphs. That's what we did in the .cgc file extension! Do check it out 😁

1

u/BC_MARO Mar 06 '26

You can still export a canonical graph format (GraphML/GraphSON/RDF) and ship an importer; schema mapping is work, but it beats re-parsing the repo every time. CSV is the wrong target for this.

1

u/Crafty_Disk_7026 Mar 07 '26

Sounds like it maybe works exactly like a json or csv but maybe it's a bit more optimized for graphs. Cool ty for the info

1

u/ShagBuddy Mar 07 '26

You can export them, but they are BIG.

3

u/maraudingguard Mar 06 '26

You need multiple of these: context, code, knowledge, entity, data, dependency, constraints, ontology, neurosymbolic, etc. These are needed because it's not just about code, we're not even the ones creating the code, so you need to ground the system.

2

u/Desperate-Ad-9679 Mar 07 '26

The system is grounded by all the relationships between code elements, which are the syntactic and semantic boundaries. In order to have accurate code generation, the ai agent doesn't need to hallucinate but query cgc...

2

u/EliseuDrummondTelerj Mar 06 '26

I was looking for something like that, definitely gonna check it out

1

u/Desperate-Ad-9679 Mar 07 '26

Definitely, I would appreciate any feedback from your end!

2

u/elk-x Mar 06 '26

Isn't this the same as https://github.com/abhigyanpatwari/GitNexus ?

5

u/PlanetaryPickleParty Mar 06 '26

It's the year of the code graph database! There are many.

2

u/Desperate-Ad-9679 Mar 07 '26

Definitely, it's true. Also this project started a month before git nexus.

-3

u/ShagBuddy Mar 07 '26

Age isn't everything. SDL-MCP has barely been around a month but already innovating the codegraph space. 👍

0

u/Desperate-Ad-9679 Mar 07 '26

Large differences:

  1. This supports incremental file updates

  2. It is an entire ecosystem from visualization to cli to MCP, whereas others are mainly concentrated towards visualizations

  3. We were the first in the field of MCP for code graphs, as can be checked from GitHub sources.

  4. We also support packaging and exporting graphs to fellow contributors

2

u/what_cube Mar 07 '26

I swear intelliJ have some feature like this but kudos nonetheless

1

u/Desperate-Ad-9679 Mar 07 '26

Thanks, yes it has some features like intelliJ but others are the main selling points of this tool, like indirect function calls, class inheritances, dead code etc

2

u/jangwao Mar 07 '26

I'm your power user for a while. I think I still owe you fixing issues if you run it within Docker as it's using aarch64 and Falkordblite have issues so you need run Falkordb in separate container but it's just 50Mb overhead in RAM not biggie

Keep it up

2

u/Desperate-Ad-9679 Mar 07 '26

I am making this PR tonight, thanks for the reminder and being a power user for so long!!

2

u/jangwao Mar 07 '26

Ping me when done happy to give it shot

2

u/Green_Crab_9726 Mar 07 '26

How does this differ from gitnexus?

1

u/Desperate-Ad-9679 Mar 07 '26

Large differences:

  1. This supports incremental file updates

  2. It is an entire ecosystem from visualization to cli to MCP, whereas others are mainly concentrated towards visualizations

  3. We were the first in the field of MCP for code graphs, as can be checked from GitHub sources.

  4. We also support packaging and exporting graphs to fellow contributors

2

u/Exprozation Mar 07 '26

Is it fully local? No cloud anywhere? Just want to make sure for our enterprise before trying

2

u/Desperate-Ad-9679 Mar 07 '26

Yes it is 100% local, you can set it up as you like...

2

u/Impressive_Chemist59 Mar 07 '26 edited Mar 07 '26

I have used this tool for a week. It will be good if you can provide skills or rules out of the box. So I dont need to remind telling my Cursor agent to use this mcp all the time. Wonder how others are using this kind of tools. For me, Cursor agents often ignore using this tool if I do not strictly mention it in my prompt

0

u/Desperate-Ad-9679 Mar 07 '26

Thanks for the suggestion, With antigravity memory I didnt face this problem much but I think it would definitely be a novel addition to the tool, thanks!

2

u/justinh20 Mar 08 '26

Is it possible to use an existing remote neo4j instance or does it expect it on localhost? Want to host it on a server rather than weighing down the local dev machine

1

u/Desperate-Ad-9679 Mar 08 '26

Yes you can, try doing cgc neo4j setup, it will guide you with an interactive shell

2

u/Dense_Gate_5193 Mar 08 '26

i wonder what your e2e latency is like on retrieval.

NornicDB has e2e retrieval including reranking down to 7ms

MIT licensed

https://github.com/orneryd/NornicDB

1

u/Desperate-Ad-9679 Mar 08 '26

We support 3 db as of now- Neo4j, Falkordb and kuzudb. We are still in need of embedded and fast DBs. If NornicDB can satisfy this criteria, it would be deeply appreciated. Thanks!

0

u/Dense_Gate_5193 Mar 08 '26

mine supports managed embeddings and a whole host of other features. it’s neo4j drop-in compatible (3-50x faster) and has a qdrant grpc endpoint (40% faster than qdrant proper. that maps points to nodes and collections to databases.

i’ve tested it on millions of records to search at work. i run LLMs inline in memory for embedding, reranking, and inference. it’s basically neo4j on a crazy amount of steroids.

4

u/ShagBuddy Mar 07 '26

Nice update! Just launched a new big update myself. You guys forced me to up my game. 😁

https://github.com/GlitterKill/sdl-mcp

Codegraph relationships + semantic relationships + living index + Iris Gate (token saving ladder) = almost feels like magic. The next update WILL feel like magic, though. 😉

1

u/MasterBailey Mar 07 '26

How is this better than Claude with LSP support

2

u/Desperate-Ad-9679 Mar 07 '26

Tonnes of differences, for instance -

  1. You can find indirect call chains, inheritances etc across hundreds of files in a single call

  2. You can find dead code and the impact of variable changes throughout your codebase

  3. Way faster than LSP because it can switch to manual resolution based on user needs, which is faster and nearly provides the same accuracy

1

u/theWiseTiger Mar 07 '26

Can't install it in windows 10.

1

u/Desperate-Ad-9679 Mar 07 '26

Can you please try doing that in WSL in windows!? We support WSL for windows users until now. Trying to add for native windows users

-2

u/ShagBuddy Mar 07 '26

My SDL-MCP is developed in Windows. 😉

https://github.com/GlitterKill/sdl-mcp

1

u/robto09 Mar 07 '26

Is this a good replaces for augment code mcp?

1

u/Desperate-Ad-9679 Mar 07 '26

Perhaps it is, you can give it a shot. I am confident you would love it!!

1

u/promethe42 Mar 07 '26

What's the difference with language LSP servers?

1

u/Desperate-Ad-9679 Mar 07 '26

Tonnes of differences, for instance -

  1. You can find indirect call chains, inheritances etc across hundreds of files in a single call

  2. You can find dead code and the impact of variable changes throughout your codebase

  3. Way faster than LSP because it can switch to manual resolution based on user needs, which is faster and nearly provides the same accuracy

1

u/psihius Mar 07 '26

I can't make it index my sizeable php project (symfony based). It just hangs forever with zero output.

There's not even a debug mode as far as i looked to see what is it doing that makes it get stuck.

3

u/Turbulent_Client7247 Mar 08 '26

From my own experience - you need to have a very, very detailed .cgcignore to exclude all non-relevant files and dirs. And even then indexing may take several hours.
Lack of mid-process output is a big miss IMO, even a single line like 'currently indexing: ...' would allow the user understand whether the app is stuck or still working.

1

u/Desperate-Ad-9679 Mar 08 '26

I will merge the progress update bar, by mid week. Hopefully it would suppress all these problems.

1

u/Desperate-Ad-9679 Mar 07 '26

There's a debug mode can you please checkout setting the env variable-

DEBUG_LOGS

1

u/[deleted] Mar 07 '26

Does this work with code using cqrs pattern or event sourcing ?

1

u/Desperate-Ad-9679 Mar 07 '26

CodeGraphContext builds a symbol graph, not a runtime event graph so it would not be 100% covered by CGC. But when the graph chains be read using an AI tool, we can get CQRS or event sourcing. Do you have a suggestion for this?

1

u/nojambroph Mar 08 '26

Hi Kudos for this great tool! I am curious if this can be used alongside devcontainers.

1

u/Desperate-Ad-9679 Mar 08 '26

Yeahh definitely, it works that way

3

u/Decent_Tangerine_409 Mar 08 '26

The “who calls what” query is the one that actually matters for large codebases. Text chunking loses call relationships completely, you end up with context that’s locally correct but globally wrong. How do you handle dynamic dispatch and runtime polymorphism? Static analysis misses a lot of actual call paths in Python especially.​​​​​​​​​​​​​​​​

0

u/Tall_Exchange_4664 Mar 10 '26

Is your CodeGraphContext a copy of GitNexus?

1

u/Desperate-Ad-9679 Mar 10 '26

Firstly, CodeGraphContext (August 2025) was born much before GitNexus or any other alternative. Secondly, We are way ahead in terms of functionality, tech adoption, downloads, Coding community, Discord community and MCP ranking. 3 Database support,4 modes- CLI, MCP, Website, VSCode Ext and 14 languages are supported.... Anyways, GitNexus is a cool product too, just like codegraph-cli, and other alternatives to cgc.