caliper
MCP serverDatabases & dataBuild datasets and rubrics, then run evals that score your AI in Caliper.
Use caliper in Claude, ChatGPT or Ahel Desktop
Free. Sign in, add caliper and connect your AI. About a minute.
Also: Claude Code · Cursor · Codex
Then ask your AI: use caliper to search docs
Needs your own account with this service. Keys stay in your vault.
Details
Available today. Use it from your connected AI after setup.
Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.
Install caliper
The server’s own address, for the clients that take one directly. Or connect ahel once and every client you use reads it from one address, with the account kept on ahel rather than in each client’s config.
Claude Code
claude mcp add --transport http --scope user caliper 'https://api.zerowidth.ai/mcp/x/caliper'Run it once in your project, then open /mcp to approve any sign-in the server asks for.
Claude Desktop
https://api.zerowidth.ai/mcp/x/caliperAdd a custom connector in Settings, paste this address, and approve the sign-in.
Cursor
cursor://anysphere.cursor-deeplink/mcp/install?name=caliper&config=eyJ1cmwiOiJodHRwczovL2FwaS56ZXJvd2lkdGguYWkvbWNwL3gvY2FsaXBlciJ9Open the link and Cursor adds the server at that address.
ChatGPT
https://api.zerowidth.ai/mcp/x/caliperIn Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.
Codex
codex mcp add caliper --url 'https://api.zerowidth.ai/mcp/x/caliper'Run it once, then sign in with codex mcp login caliper if the server asks for an account.
Tools it offers (45)
What this server listed when ahel dialed its public endpoint in Oct 2026, with no key and no account of yours. The names are the server’s own.
search_docsget_doclist_docscaliper_datasets_getcaliper_datasets_updatecaliper_datasets_deletecaliper_datasets_update_itemcaliper_datasets_remove_itemcaliper_datasets_generatecaliper_datasets_generate_itemscaliper_rubrics_listcaliper_rubrics_getcaliper_rubrics_updatecaliper_rubrics_deletecaliper_evals_getcaliper_evals_runs_item_executioncaliper_evals_updatecaliper_evals_deletecaliper_evals_runs_cancelcaliper_sources_listcaliper_sources_over_timecaliper_traces_listcaliper_traces_getcaliper_source_feeds_listcaliper_sources_to_datasetcaliper_source_feeds_stopcaliper_starters_listcaliper_starters_installcaliper_datasets_listcaliper_flow_performance
ahel review
S5low
no public repository, nothing to review
Automated review, not a security audit. Ruleset v1.
Advanced
- Delivery
- caliper MCP server → your ahel connector (mcp.ahel.ai) → your AI.
- Item type
- mcp-server
- Key
ai-zerowidth-caliper- Hosted endpoint
https://api.zerowidth.ai/mcp/x/caliper
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