MCP semantic conventions#2083
Merged
lmolkova merged 28 commits intoopen-telemetry:mainfrom Jan 12, 2026
Merged
Conversation
3 tasks
samsp-msft
reviewed
Apr 14, 2025
samsp-msft
reviewed
Apr 14, 2025
Cirilla-zmh
reviewed
Apr 16, 2025
lmolkova
commented
Apr 17, 2025
3 tasks
gyliu513
reviewed
Apr 21, 2025
gyliu513
reviewed
May 1, 2025
aabmass
reviewed
May 5, 2025
lmolkova
commented
May 15, 2025
brunobat
reviewed
May 16, 2025
brunobat
left a comment
There was a problem hiding this comment.
Thanks!
In general this seems reasonable.
Just added 2 comments.
aabmass
approved these changes
Dec 22, 2025
timbotnik
reviewed
Dec 23, 2025
This was referenced Dec 24, 2025
Co-authored-by: Aaron Abbott <aaronabbott@google.com>
Co-authored-by: Aaron Abbott <aaronabbott@google.com>
Co-authored-by: Aaron Abbott <aaronabbott@google.com>
Member
Author
|
Draft of the blogpost in case it helps with the review: https://github.com/lmolkova/opentelemetry.io/blob/6fed6dfb4839b661ed269b67dc16f653f48ae9f4/content/en/blog/2026/mcp-semantic-conventions.md |
jsuereth
approved these changes
Jan 7, 2026
Contributor
jsuereth
left a comment
There was a problem hiding this comment.
Nice! I like how you've worded the context propagation component to be forward compatible.
Cirilla-zmh
approved these changes
Jan 12, 2026
Copilot AI
added a commit
to modelcontextprotocol/csharp-sdk
that referenced
this pull request
Jan 12, 2026
…en-telemetry/semantic-conventions#2083 - Change mcp.tool.name to gen_ai.tool.name - Change mcp.prompt.name to gen_ai.prompt.name - Change mcp.request.id to jsonrpc.request.id - Change rpc.jsonrpc.error_code to rpc.response.status_code - Update network.transport values from 'stdio' to 'pipe' and 'sse'/'http' to 'tcp' - Add gen_ai.operation.name attribute (value: 'execute_tool' for tools/call) - Update histogram bucket boundaries to match semantic conventions spec - Update tests to verify new attribute names Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
Merged
18 tasks
chrisguidry
added a commit
to PrefectHQ/fastmcp
that referenced
this pull request
Jan 15, 2026
Updates FastMCP's telemetry to align with the new MCP semantic conventions from open-telemetry/semantic-conventions#2083. This gives us interoperability with other MCP implementations while keeping fastmcp.* attributes for things unique to our framework. Changes: - Span names now follow `{method} {target}` format (e.g., `tools/call greet`) - Added `mcp.method.name` and `mcp.resource.uri` attributes - Renamed `fastmcp.session.id` to standard `mcp.session.id` - Kept fastmcp.* attributes for server name, component info, provider details 🤖 Generated with Claude Code Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
9 tasks
11 tasks
7 tasks
|
Hey! We built a TypeScript implementation of these MCP semantic conventions in toad-eye — an open-source observability toolkit for MCP servers. What we implemented based on this spec:
Also added MCP-specific metrics ( 11 Grafana dashboards auto-provisioned, including 3 MCP-specific ones. Happy to share feedback on the spec from an implementer's perspective if that's useful. |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
20 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Fixes #2043
Adds the first version of MCP conventions including spans and basic metrics.
Implementations/prototypes:
Here's a draft of the blog: https://github.com/lmolkova/opentelemetry.io/blob/6fed6dfb4839b661ed269b67dc16f653f48ae9f4/content/en/blog/2026/mcp-semantic-conventions.md