ai.zerowidth/caliper MCP server
45 tools · tools last listed 4 Nov 2026
A community server in the official MCP registry. Once a day, Stackduke's Radar connects to it the way any MCP client would, with no account and no sign-in, and lists its tools. It never runs them.
- Address
https://api.zerowidth.ai/mcp/x/caliper- Name it gives itself
- zerowidth-mcp
- Tracked since
- 16 Oct 2026
- Tools first listed
- 16 Oct 2026
- Tools last listed
- 4 Nov 2026
All 45 tools
By label: 7 that delete or destroy things, 1 that sends or publishes, 15 that create or change things, 22 said to only read.
| Tool | Labelled as |
|---|---|
caliper_datasets_delete | Deletes |
caliper_datasets_remove_item | Deletes |
caliper_datasets_update_item | Deletes |
caliper_evals_delete | Deletes |
caliper_evals_update | Deletes |
caliper_rubrics_delete | Deletes |
entity_tags_set | Deletes |
caliper_sources_list | Sends |
caliper_datasets_add_items | Changes things |
caliper_datasets_create | Changes things |
caliper_datasets_generate | Changes things |
caliper_datasets_generate_items | Changes things |
caliper_datasets_update | Changes things |
caliper_evals_create | Changes things |
caliper_evals_run | Changes things |
caliper_evals_runs_cancel | Changes things |
caliper_rubrics_create | Changes things |
caliper_rubrics_update | Changes things |
caliper_source_feeds_stop | Changes things |
caliper_sources_to_dataset | Changes things |
caliper_starters_install | Changes things |
comments_create | Changes things |
comments_resolve | Changes things |
caliper_datasets_get | Said to only read |
caliper_datasets_list | Said to only read |
caliper_evals_get | Said to only read |
caliper_evals_list | Said to only read |
caliper_evals_runs_get | Said to only read |
caliper_evals_runs_item_execution | Said to only read |
caliper_evals_runs_list | Said to only read |
caliper_flow_performance | Said to only read |
caliper_rubrics_get | Said to only read |
caliper_rubrics_list | Said to only read |
caliper_source_feeds_list | Said to only read |
caliper_sources_over_time | Said to only read |
caliper_starters_list | Said to only read |
caliper_traces_get | Said to only read |
caliper_traces_list | Said to only read |
comments_list | Said to only read |
entity_tags_browse | Said to only read |
entity_tags_get | Said to only read |
get_doc | Said to only read |
list_docs | Said to only read |
search_docs | Said to only read |
search_workspace | Said to only read |
Labels for community servers are machine guesses from each server's own tool names, descriptions and hints (accuracy not yet measured). They are not a safety verdict. How labels work
Recent checks
Listed its tools at 19 of 19 checks in the 30 days to 4 Nov 2026
Recent changes
Description rewritten on search_docs. Inputs or outputs changed on search_workspace.
Description rewritten on search_workspace. Inputs or outputs changed on search_workspace.
A change is a tool added, removed or rewritten between two daily checks. Radar keeps each server's latest 10. What counts as a change