WriteLens

Quality scores for any text. POST /v1/score → JSON.

Try it

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API

POST /v1/score

curl -X POST https://writelens.ivixivi.workers.dev/v1/score \ -H "Content-Type: application/json" \ -H "Authorization: Bearer wl_yourkey" # optional for paid tier \ -d '{"text":"your text here"}'

Returns:

{ "clarity": 4, "persuasiveness": 3, "structure": 5, "factuality_concerns": ["unsubstantiated claims about 'experts'"], "overall": 4, "suggestions": [ "Replace 'various factors' with the actual factors", "Cite specific experts or remove the appeal to authority" ], "char_count": 312 }

Pricing

Free

$0
  • 50 calls / day / IP
  • No API key needed
  • Web demo

Metered

$0.01 / call
  • API key + Bearer auth
  • $10 soft cap (raises with billing)
  • For: AI agents, scripts, products
  • Pay-per-use, no subscription

Get an API key

Email-only signup. Key shown once. Calls metered until billing wires up — soft cap 1000 calls / $10.

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Why

Most "is this writing good" tools are aimed at humans. WriteLens is aimed at code — a single endpoint your product calls when it needs to grade a draft, filter low-quality content, or route based on style. Built for AI agents, content pipelines, moderation systems, and engineers who need a quality signal without standing up an LLM stack.