AI client compatibility

JamRelay exposes a remote MCP Streamable HTTP endpoint:

https://mcp.example.com/mcp

It supports two authentication families:

• MCP OAuth — recommended for clients with first-class OAuth support;
• static Bearer token — useful for debugging and clients that allow custom HTTP headers.

Multi-client OAuth

JamRelay no longer has a one-client/one-callback limitation. A single deployment can keep an existing static ChatGPT client while also accepting automatically registered native/CLI clients through DCR.

Available registration paths:

legacy single static client     ✅ backwards compatible
multi-client static registry    ✅
Dynamic Client Registration     ✅
public OAuth clients            ✅
confidential OAuth clients      ✅
CIMD                            not advertised yet

See OAuth and multi-client compatibility for the registration model and current MCP-spec note about CIMD.

Compatibility matrix

Client	Remote Streamable HTTP	OAuth	Bearer/custom headers	Recommended JamRelay mode	Status
ChatGPT	✅	✅	custom-app UI is OAuth-oriented	static OAuth	previously verified
Claude hosted surfaces	✅	✅	not primary connector path	DCR	protocol path implemented
Claude Code	✅	✅	dynamic headers also supported	DCR	protocol path implemented
Gemini CLI	✅	✅	✅	DCR	protocol path implemented
Cursor	✅	✅	✅	DCR or static OAuth	protocol path implemented
VS Code + Copilot	✅	✅	✅	DCR	protocol path implemented
Windsurf Cascade	✅	✅	✅	OAuth discovery / Bearer fallback	not yet verified end-to-end
MCP Inspector	✅	✅	✅	OAuth or Bearer	developer verification tool

“Protocol path implemented” means JamRelay now implements the registration/callback behavior documented by that vendor. It is not a certification that every current client build has been manually exercised against this exact release.

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Client guides

• ChatGPT
• Claude
• Gemini CLI
• Cursor
• VS Code + GitHub Copilot
• Windsurf Cascade
• MCP Inspector
• OAuth and multi-client compatibility

Last reviewed against vendor documentation: 2026-09-12.