caliper

MCP serverDatabases & data

Build 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

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.

caliperStart free

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/caliper

    Add a custom connector in Settings, paste this address, and approve the sign-in.

  • Cursor

    cursor://anysphere.cursor-deeplink/mcp/install?name=caliper&config=eyJ1cmwiOiJodHRwczovL2FwaS56ZXJvd2lkdGguYWkvbWNwL3gvY2FsaXBlciJ9

    Open the link and Cursor adds the server at that address.

  • ChatGPT

    https://api.zerowidth.ai/mcp/x/caliper

    In 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_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

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