Developer API / REST + JSON

Extract brand voice from any URL.

One API call. Send a website URL, get structured brand voice data back. Raw page content or processed voice profiles, ready to inject into any LLM.

                    
                    request.sh
                
                    # Extract brand voice from any website

                    curl -X POST https://brandvoiceapi.com/v1/extract \

                      -H "Authorization: Bearer $API_KEY" \

                      -d '{ "url": "stripe.com", "format": "llm_ready" }'

How it works

URL in. Brand voice out.

Send a URL

Pass any company website to the API. We crawl homepage, about page, and key content pages automatically.

→

We extract

AI analyzes tone, vocabulary, sentence structure, personality traits, and communication patterns across all pages.

→

You build

Get back structured JSON: raw scraped content, processed voice profile, or an LLM-ready prompt snippet you can inject directly.

Response formats

Structured data, not guesswork

Choose the level of processing you need. Get raw page content for your own pipeline, a detailed voice profile for analysis, or an LLM-ready prompt you can paste straight into your system instructions.

Raw HTML Voice Profile LLM-Ready Cached Webhooks

{
  "brand": "stripe.com",
  "voice_profile": {
    "tone": "confident, precise, developer-friendly",
    "formality": 0.72,
    "personality": ["technical", "authoritative", "clean"],
    "vocabulary_level": "professional",
    "sentence_style": "short, declarative",
    "avoids": ["jargon", "hype words", "exclamation marks"]
  },
  "llm_prompt": "Write in a confident, precise tone...",
  "pages_analyzed": 5,
  "cached_until": "2026-04-09T08:00:00Z"
}

Built for developers

Every AI product needs this

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AI Writing Tools

Let users generate content that actually sounds like their brand, not like generic AI. One API call during onboarding.

⚙

Marketing Automation

Email sequences, ad copy, social posts. Every piece of generated content matches the client's voice automatically.

💬

Customer Service AI

Chatbots and support agents that respond in the brand's actual voice. Not corporate filler, not robotic templates.

📈

Content Platforms

CMS tools, blog generators, social schedulers. Embed brand voice consistency as a feature your users love.

Brand voice is infrastructure,
not a feature.

Every AI-first product rebuilds brand voice extraction from scratch. BrandVoiceAPI makes it a single API call. The plumbing disappears so you can focus on what you're building.