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Evaluate Content with Multi-Persona AI Insights

Get diverse, data-driven feedback from 18 AI personas for any written content — instantly and programmatically. Compare versions, anticipate audience reactions, and optimize messaging before you publish.

  • 18 Diverse Personas – M.E.C.E. cross-section of US demographics
  • 0-100 Quality Score – Instant, comparable content ratings
  • Bring Your Own Key – Use your Groq API key, start instantly

BYOK: Use your Groq key + 10% fee. Managed keys in beta – request access.

API Response Preview Score: 72/100
{
  "score": 72,
  "summary": "Professional tone but feels
    generic. Add timeline and specific
    compensation offer...",
  "persona_responses": [
    {
      "name": "Zoe",
      "score": 58,
      "guidance": "Too formal. Just
        tell me when my stuff arrives."
    },
    // ... 17 more personas
  ]
}

Real response from Council API evaluation

Multi-Persona Feedback in One API Call

The Council API delivers multi-persona AI evaluations of your written content — so you can compare versions, anticipate audience reactions, and optimize messaging programmatically.

1. Submit Content

Send any text via API: emails, marketing copy, docs, creative writing

2. 18 Personas Evaluate

Parallel AI personas provide diverse perspectives in ~1-2 seconds

3. Get Aggregated Score

Receive 0-100 score, summary, and actionable per-persona feedback

A/B Test Content Compare versions before publishing to find what resonates
Target Demographics See how Gen Z, Boomers, or professionals react differently
Automate QA Build quality gates into your content pipelines
Track Improvements Measure content quality over time with consistent scoring

Built for Content Teams & Developers

Real-world scenarios where Council API delivers value

Customer Emails

Test apology emails, support responses, and outreach before sending. See which version feels most genuine to different audiences.

"How effective is this apology email?"
Marketing Copy

Evaluate subject lines, ad copy, and landing pages. Get feedback from personas matching your target market.

"Would this headline make you click?"
Documentation

Ensure API docs, help articles, and READMEs are clear to both beginners and experts.

"Is this documentation clear and helpful?"
Social Media

Test LinkedIn posts, tweets, and captions. Find the tone that engages your professional audience.

"Would this post engage professionals?"
Support Scripts

Validate chat scripts and response templates. Ensure they're empathetic and efficient for all customer types.

"Does this response feel helpful?"
Creative Writing

Get feedback on fiction, poetry, or blog posts from diverse reading perspectives.

"How engaging is this opening paragraph?"
Get Started with BYOK

Use your own Groq API key – no approval required

18 Diverse AI Personas

A M.E.C.E. (Mutually Exclusive, Collectively Exhaustive) cross-section representing the US population

🎓
Maya
19yo, NYC, values authenticity
💻
Zoe
16yo, prefers brevity
🖥
Kevin
27yo, AI engineer, precise
🏥
Maria
28yo, nurse, empathetic
🎨
Alex
26yo, artist, inclusive
🔧
Carlos
23yo, mechanic, practical
💼
Ben
31yo, office worker, humor
👪
Emily
33yo, suburban mom, warm
🎇
Darius
30yo, Atlanta, cultural
Ron
38yo, supervisor, direct
💼
Raj
45yo, entrepreneur, strategic
📚
Susan
60yo, retired teacher, formal

Plus 6 more personas including accessibility advocate, sports fan, history buff, and professional editor

Fast & Parallel 18 evaluations in ~1-2 seconds
Enterprise Security SOC 2 compliant infrastructure
Full Observability Every call logged to BigQuery
BYOK Supported Use your own Groq API keys

Simple API, Powerful Results

One POST request. 18 perspectives. Actionable insights.

curl -X POST https://api.demeterics.com/council/v1/evaluate \
  -H "Authorization: Bearer dmt_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "question": "How effective is this customer apology email?",
    "content": "Dear valued customer, We sincerely apologize...",
    "num_personas": 8
  }'
import requests

response = requests.post(
    "https://api.demeterics.com/council/v1/evaluate",
    headers={"Authorization": "Bearer dmt_your_api_key"},
    json={
        "question": "How effective is this customer email?",
        "content": "Your email content here...",
        "num_personas": 8
    }
)

result = response.json()
print(f"Score: {result['score']}/100")
print(f"Summary: {result['summary']}")
const response = await fetch(
  "https://api.demeterics.com/council/v1/evaluate",
  {
    method: "POST",
    headers: {
      "Authorization": "Bearer dmt_your_api_key",
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      question: "How effective is this customer email?",
      content: "Your email content here...",
      num_personas: 8
    })
  }
);

const result = await response.json();
console.log(`Score: ${result.score}/100`);

Simple, Transparent Pricing

Pay only for what you use. No subscriptions, no minimums.

~$0.003/eval 9 personas, ~16K tokens
15% Service Fee Managed keys
10% with BYOK Your Groq keys

Evaluations billed as N+1 LLM calls: N persona calls + 1 aggregation synthesis

Get Started Now

BYOK open to all. Contact us for managed key access.

Frequently Asked Questions

BYOK (Bring Your Own Key): Open to everyone! Just sign up, get a Demeterics API key, and use the dual-key format with your own Groq API key. No approval required.

Managed Keys: Currently in beta. Email support@demeterics.com to request access if you prefer not to manage your own Groq key.

You can choose between 2-18 personas per evaluation. The default is 8, which provides a good balance of diversity and cost. Use fewer (4-6) for quick feedback, or more (12-18) for comprehensive analysis.

Any written content: customer emails, marketing copy, documentation, social media posts, creative writing, support scripts, product descriptions, and more. The evaluation adapts based on the question you provide.

All persona evaluations run in parallel, so a typical 8-persona evaluation completes in 1-2 seconds. The aggregation synthesis adds another ~500ms. Total end-to-end time is usually under 3 seconds.

Yes! You can use your own Groq API key with the dual-key authentication format. BYOK reduces the service fee from 15% to 10%, and you pay Groq directly for LLM costs. Your provider discounts and rate limits apply.

Ready to Get Multi-Persona Feedback on Your Content?

Sign up, bring your Groq key, and start evaluating content in minutes.

BYOK open to all. 10% platform fee. No approval required.