ZeroWidth Caliper
Build datasets and rubrics, then run evals that score your AI in Caliper.
Description as published in the official MCP registry.
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What we measured
| Endpoint | https://api.zerowidth.ai/mcp/x/caliper | registry |
|---|---|---|
| Handshake | Answers the MCP handshake and lists its tools (1,577 ms) | our check, 2026-10-12 |
| Protocol version | 2025-11-25 | our check, 2026-10-12 |
| Tools (45) | search_docs, get_doc, list_docs, caliper_datasets_get, caliper_datasets_update, caliper_datasets_delete, caliper_datasets_update_item, caliper_datasets_remove_item, caliper_datasets_generate, caliper_datasets_generate_items, caliper_rubrics_list, caliper_rubrics_get, caliper_rubrics_update, caliper_rubrics_delete, caliper_evals_get, caliper_evals_runs_item_execution, caliper_evals_update, caliper_evals_delete, caliper_evals_runs_cancel, caliper_sources_list, caliper_sources_over_time, caliper_traces_list, caliper_traces_get, caliper_source_feeds_list, caliper_sources_to_dataset, caliper_source_feeds_stop, caliper_starters_list, caliper_starters_install, caliper_datasets_list, caliper_flow_performance, caliper_evals_runs_list, caliper_evals_runs_get, caliper_evals_list, caliper_evals_run, caliper_datasets_create, caliper_datasets_add_items, caliper_rubrics_create, caliper_evals_create, comments_list, comments_create, comments_resolve, search_workspace, entity_tags_get, entity_tags_browse, entity_tags_set | tools/list, 2026-10-12 |
| Registry version | 1.0.0 · active · updated 2026-10-07 | registry |
Signed reports
No signed reports yet. A report carries a signed decision record from the reporter's gate, so it shows that the gate allowed a call, not just an opinion; it does not prove which server answered. How to file one.
Connect
claude mcp add --transport http caliper https://api.zerowidth.ai/mcp/x/caliperCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
Related servers
- ZeroWidth Compass Read and update your Compass map: pages, changes, opportunities and interviews.
- ZeroWidth Ledger Log decisions with expectations, add evidence, and track metrics in Ledger.
- ZeroWidth Napkin Draw boards, write docs and sheets, and build decks with your brand in Napkin.
- ZeroWidth Prism Explore ideas in Prism fields, run studies, and read research findings.
- ZeroWidth Workbench Build, run and publish Workbench flows, tasks, shims and knowledge bases.
- ZeroWidth Search, write and run work across Compass, Workbench, Caliper, Ledger, Prism and Napkin.
Is this your server?
Show the result of our latest check where your users look first. The badge is a live image: it changes when our check does, and it links back to this page.
[](https://openforallofus.com/tools/ai.zerowidth/caliper)<a href="https://openforallofus.com/tools/ai.zerowidth/caliper"><img src="https://openforallofus.com/badge/ai.zerowidth/caliper.svg" alt="Agora: MCP handshake check" height="20"></a>The badge reports one thing: the result of our last handshake check. A server with no remote endpoint shows as "runs locally". How we check.
Agents can read this page as data: MCP endpoint https://openforallofus.com/api/mcp, tool get_tool with name ai.zerowidth/caliper.