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WORKBENCH0.4375140955451368

Workbench · Connector

Use the Workbench inside Claude

Add one connector and Claude can run the Workbench tools mid-conversation — count tokens, price a call across providers, audit a prompt, plan caching — without leaving the chat. It works in claude.ai and Cowork. Everything runs on our side as plain math: free, no API key, no account.

Connector URL

https://turntwo.dev/api/mcp

How to add it

  1. 1In Claude.ai, open Settings → Connectors (Team/Enterprise: Organization settings → Connectors).
  2. 2Click Add custom connector.
  3. 3Paste the URL above and save. No API key or sign-in is required.
  4. 4Start a chat and ask, e.g., “audit this prompt” or “what would this cost on Sonnet vs Opus?” — Claude will call the tool.

What Claude can call (8 tools)

count_tokensToken / character / word count for any text.
estimate_costCost of an Anthropic call from token usage — per call and per month.
compare_provider_costsPrice one call across Claude, GPT, and Gemini side by side.
plan_context_budgetCheck whether your prompt pieces fit a model’s context window.
audit_promptGrade a prompt against the seven most common cost sins + a $ saving.
suggest_cachingFind prompt-caching savings and the optimal block order.
find_prompt_wasteFlag hedges, filler, and wordy phrasing with leaner replacements.
pdf_to_markdownConvert a PDF (by URL or base64) to clean Markdown — headings and lists preserved.

These give Claude exact numbers it can’t compute on its own. For anything generative (rewriting, drafting), Claude does that itself — so there’s nothing to pay for here.

Prefer to use them in a browser? Open the Workbench →