Knowledge index
Mobile Network Specifications (3GPP)
Every 3GPP technical specification from Release 12 onward, across the RAN, SA and CT series.
Works with
Claude Code, Codex, Claude, ChatGPT, Grok and any MCP client
Domain
Telecom
Size
20k+ specifications
Coverage
Release 12 (2015) to Release 19 (2025)
Example questions
What conditions trigger a radio link failure procedure in NR according to the RRC specification?
Which specification defines the handover procedure between 5G NR and LTE?
What changed in the PDU session establishment procedure between Release 16 and Release 17?
Use cases
Find the exact clause and the conditions attached to a procedure.
Trace a network fault back to the condition it violates in the spec.
Check what changed between releases without diffing PDFs.
About this index
3GPP has set the global standards for 3G, 4G and 5G mobile networks since 1999. Specifications are organized into series by function (23 for architecture, 36 for LTE, 38 for 5G and more), each with its own numbered releases. Every network product has to implement these specs and interoperate against them, but a single specification can run to hundreds of pages. This index covers more than 20,000 specification documents and 300 million words, so an agent can find the clause it needs without reading a spec end to end.
Owner
3GPP (3rd Generation Partnership Project)
Coverage
Release 12 (2015) to Release 19 (2025)
License and credit
Data comes from 3GPP. Kapa provides this page and the MCP URL. It is not an official 3GPP product and implies no endorsement. Credit 3GPP when citing.
Caveats
Specifications change between releases. Check the release and version before relying on a requirement.
Add to your agent
Copy the setup prompt and paste into your agent.
Or add it manually
MCP URL
https://3gppindex.mcp.kapa.ai
Claude Code
Codex
Claude
ChatGPT
Grok Bot
Other
claude mcp add --transport http
3gpp
https://3gppindex.mcp.kapa.ai
Then run /mcp and finish sign-in in the browser.
Example
With the MCP, Claude cites the actual records
Same question, same model (Opus 5.5, high effort). Left: Claude with web search. Right: Claude with this index.
Normal Claude
Web search
With knowledge index
3GPP
MCP
Frequently asked questions
What is a knowledge index?
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A searchable index of a public data source, like NASA's aviation safety reports, that your agent can query over MCP.
How do I add one to my agent?
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How is this different from web search?
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Is it free?
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Are these official connectors?
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Can I create my own index?
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