Take a personality assessment via the SoulTrace API. Use when the user wants to take a personality test, discover their psychological archetype, understand their personality traits, or get a color-based personality profile. The API uses a 5-color psychological model (White=structure, Blue=understanding, Black=agency, Red=intensity, Green=connection) with Bayesian adaptive question selection to classify users into one of 25 archetypes. Triggers on: personality test, personality assessment, what's my personality, take a quiz, archetype test, color personality, soultrace.
Take an adaptive personality assessment through the SoulTrace API. Answer 24 questions on a 1-7 Likert scale and receive your personality archetype based on a 5-color psychological model.
POST https://soultrace.app/api/agent
No authentication required. Rate limited to 100 requests/hour per IP.
The API is stateless. You pass all accumulated answers with every request, and the server replays the Bayesian inference to select the next optimal question.
Send an empty answers array to get the first question:
curl -X POST https://soultrace.app/api/agent \
-H "Content-Type: application/json" \
-d '{"answers": []}'
Response:
{
"status": "in_progress",
"question": {
"id": 42,
"text": "I find deep satisfaction in mastering complex systems."
},
"currentDistribution": {
"white": 0.2,
"blue": 0.2,
"black": 0.2,
"red": 0.2,
"green": 0.2
},
"entropy": 2.322,
"progress": { "answered": 0, "total": 24 }
}
The user answers each question on a scale of 1-7:
Append the answer and send all answers so far:
curl -X POST https://soultrace.app/api/agent \
-H "Content-Type: application/json" \
-d '{"answers": [{"questionId": 42, "score": 6}]}'
Keep accumulating answers. Each response gives the next question.
After 24 answers, the response automatically returns the final result:
{
"status": "complete",
"resultId": "abc-123-def",
"resultUrl": "https://soultrace.app/en/results/abc-123-def",
"distribution": {
"white": 0.15,
"blue": 0.35,
"black": 0.25,
"red": 0.10,
"green": 0.15
},
"entropy": 1.89,
"archetype": {
"key": "blue-black",
"name": "Strategist",
"alignmentScore": 87.3,
"coreDynamic": "...",
"strengths": ["..."],
"weaknesses": ["..."]
},
"topMatches": [
{ "key": "blue-black", "name": "Strategist", "alignmentScore": 87.3 },
{ "key": "blue", "name": "Rationalist", "alignmentScore": 82.1 },
{ "key": "black-blue", "name": "Operator", "alignmentScore": 78.5 }
],
"shadowColors": [
{ "color": "red", "score": 0.10 },
{ "color": "green", "score": 0.15 }
],
"progress": { "answered": 24, "total": 24 }
}
When a user asks to take the personality test:
{"answers": []}.| Score | Meaning |
|---|---|
| 1 | Strongly Disagree |
| 2 | Disagree |
| 3 | Slightly Disagree |
| 4 | Neutral |
| 5 | Slightly Agree |
| 6 | Agree |
| 7 | Strongly Agree |
| Color | Drive | Essence |
|---|---|---|
| White | Structure, fairness | Order, responsibility |
| Blue | Understanding, mastery | Curiosity, precision |
| Black | Agency, achievement | Ambition, strategy |
| Red | Intensity, expression | Passion, honesty |
| Green | Connection, growth | Belonging, patience |
| Status | Meaning |
|---|---|
| 400 | Invalid request body or answers format |
| 429 | Rate limit exceeded (check Retry-After header) |
| 500 | Server error |
GET https://soultrace.app/api/agent
Returns API metadata (version, question count, score range).