* feat(mcp)!: disable stdio MCP servers by default
stdio MCP servers now only run when the proxy is started with
LITELLM_ENABLE_MCP_STDIO=true. While it is off, existing stdio servers stay
registered but never start: tool listings skip them quietly, direct tool
calls and health checks return a 403 naming the env var, and creating or
updating a stdio server is rejected. The flag is read from the process
environment only, so DB-stored environment_variables cannot turn it on.
The UI reads mcp_stdio_enabled from /.well-known/litellm-ui-config to grey
out the stdio transport, show a banner on stdio forms, and badge stdio
server cards.
BREAKING CHANGE: stdio MCP servers are off by default. Set
LITELLM_ENABLE_MCP_STDIO=true in the proxy environment and restart to keep
using them.
* fix(mcp): ignore stdio flag from config file and read UI flag from the selected worker
LITELLM_ENABLE_MCP_STDIO set under environment_variables in config.yaml is now skipped like the DB-stored value, so only the process environment can enable stdio. The dashboard reads mcp_stdio_enabled from the proxy it is managing, so a control plane shows each worker's own setting.
* test(mcp): cover non-mapping payloads in the shared transport validator
* fix(mcp): skip blocked stdio servers quietly in every listing and keep the UI unchanged until the flag loads
Prompt, resource and resource-template listings now skip a blocked stdio server at debug level like tool listing does, instead of logging a warning per server on every call. The dashboard only treats stdio as disabled once the proxy explicitly reports mcp_stdio_enabled false, so a proxy with the flag on, or an older one without the field, renders exactly as before with no flicker while loading.
* fix(mcp): route blocked stdio tool calls to the flag error and warn once per server
A gateway tools/call naming a blocked stdio server's tool now returns the
LITELLM_ENABLE_MCP_STDIO message instead of "Tool not found".
The "will not start" warning moves out of build_mcp_server_from_table, which
DB reload re-runs on every cycle for rows with a NULL updated_at and which
drafts and test-connection also call. It now fires when a row first enters
the registry or changes transport.
* fix(ui): explain on the server detail page why a stdio server is inert
The Overview and MCP Tools tabs showed "No tools available" with no reason
while stdio is disabled. The detail page now shows the same warning banner
as the edit form, and hands off to the form's banner once editing starts.
* refactor(ui): name the stdio banner conditions on the server detail page
Keeps local/no-long-condition-chain within its budget
* fix(proxy): log the ignored DB-stored LITELLM_ENABLE_MCP_STDIO warning once
The DB config sync re-reads environment_variables on every cycle, so a stored
flag logged the warning on each sync per worker
* fix(tracing): use ClickHouse URL for reads by default
* fix(tracing): unify ClickHouse storage configuration
* fix(tracing): update dashboard setup copy for one URL
* test(tracing): make tests/unit/tracing a package
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(config): drop legacy string tracing store variant
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(tracing): own ClickHouse defaults in constants and reject unset env references
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(tracing): use raw regex patterns in config tests
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(tracing): read ClickHouse env defaults when tracing config resolves
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(ui): split audit log query guard to fit condition-chain budget
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(proxy): move proxy_server, _experimental and db tests into tests/unit/proxy
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(proxy): keep tuple identity in proxy state restore and fix misc target paths
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: yuneng <yuneng@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
