Solsten

Solsten (originally 12traits) is a Berlin- and Minneapolis-based psychological-AI company that builds audience intelligence for product, marketing and research teams, pairing validated psychographic measurement with behavioural telemetry to model how real people think, decide and engage. Its product suite spans Traits (assessment-driven psychographic personas for a company's real customers), Navigator (a library of 200,000+ pre-profiled audiences drawn from 2M+ questionnaire respondents) and Elaris (audience-aware generative content). The public developer surface is a small REST API at api.solsten.io covering assessment completion, per-user assessment status, segment/persona user lists and GDPR-style user-data deletion, plus a documented Microsoft Azure PlayFab webhook and a cloud-object-storage bulk ingestion contract for behavioural events and KPIs.

Solsten is listed with 1 API on the APIs.io network. Tagged areas include Company, Audience Intelligence, Psychographics, Consumer Insights, and Analytics.

The Solsten catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Solsten’s developer surface includes documentation, API reference, support, engineering blog, authentication, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.8/100 developing ▬ flat Agent 25/100 agent aware Front door AI 6/6 dominant Heartbeat 82/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Company Audience IntelligencePsychographicsConsumer Insights Analytics Artificial Intelligence Gaming Market Research Personalization Behavioral Data

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 40.8/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 7.7 / 17

Access Clarity 6.0 / 17

Operational Transparency 2.3 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 4.9 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 39.0 — up to +15.3 composite points
Access Clarity scores 35.5 — up to +12.9 composite points
Developer Ergonomics scores 45.2 — up to +11.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/12traits/apis.yml: open an issue on github.com/api-evangelist/12traits to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Surveys, Market Research and Experience Management	distribution	9.6 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Solsten API

REST API for the Solsten assessment and persona platform. Documented operations cover listing users who completed an assessment (paged, 500 per page, one-hour cache), checking a...

Solsten API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

12Traits Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

12Traits Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

12Traits Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

12Traits Webhooks

ASYNCAPI

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

12Traits Authentication

2 schemes

SECURITY

12Traits Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

12Traits Vulnerability Disclosure

Hackerone

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Webhooks

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 5

Authentication, authorization, and security posture

Authentication

Authentication

Compliance

Compliance

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: 12traits
name: Solsten
description: Solsten (originally 12traits) is a Berlin- and Minneapolis-based psychological-AI company that builds audience
  intelligence for product, marketing and research teams, pairing validated psychographic measurement with behavioural telemetry
  to model how real people think, decide and engage. Its product suite spans Traits (assessment-driven psychographic personas
  for a company's real customers), Navigator (a library of 200,000+ pre-profiled audiences drawn from 2M+ questionnaire respondents)
  and Elaris (audience-aware generative content). The public developer surface is a small REST API at api.solsten.io covering
  assessment completion, per-user assessment status, segment/persona user lists and GDPR-style user-data deletion, plus a
  documented Microsoft Azure PlayFab webhook and a cloud-object-storage bulk ingestion contract for behavioural events and
  KPIs.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://solsten.io/api/images/?path=2023/08/Solsten_avatar.png
url: https://raw.githubusercontent.com/api-evangelist/12traits/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-09-05'
modified: '2026-09-05'
tags:
- Company
- Audience Intelligence
- Psychographics
- Consumer Insights
- Analytics
- Artificial Intelligence
- Gaming
- Market Research
- Personalization
- Behavioral Data
tags_raw:
- company
- audience-intelligence
- psychographics
- consumer-insights
- analytics
- artificial-intelligence
- gaming
- market-research
- personalization
- behavioral-data
apis:
- name: Solsten API
  description: REST API for the Solsten assessment and persona platform. Documented operations cover listing users who completed
    an assessment (paged, 500 per page, one-hour cache), checking a single user's assessment status, reading assessment metadata
    and completion statistics, permanently deleting a user's data on request, and fetching the user IDs that belong to a segment/persona.
    A PlayFab webhook endpoint accepts inbound gameplay events. Authentication is a Bearer API key issued per dashboard. No
    OpenAPI or other machine-readable contract is published.
  humanURL: https://docs.api.solsten.io/
  baseURL: https://api.solsten.io/v1
  image: https://solsten.io/api/images/?path=2023/08/Solsten_avatar.png
  tags:
  - Audience Intelligence
  - Psychographics
  - Consumer Insights
  - Analytics
  - Gaming
  - Behavioral Data
  tags_raw:
  - audience-intelligence
  - psychographics
  - consumer-insights
  - analytics
  - gaming
  - behavioral-data
  properties:
  - type: Documentation
    url: https://docs.api.solsten.io/
  - type: APIReference
    url: https://docs.api.solsten.io/
  - type: Authentication
    url: authentication/12traits-authentication.yml
  - type: Conventions
    url: conventions/12traits-conventions.yml
  - type: ErrorCatalog
    url: errors/12traits-error-codes.yml
  - type: DataModel
    url: data-model/12traits-data-model.yml
  - type: RateLimits
    url: rate-limits/12traits-rate-limits.yml
  - type: Lifecycle
    url: lifecycle/12traits-lifecycle.yml
  - type: Webhooks
    url: asyncapi/12traits-webhooks.yml
  - type: X-MCPServerCandidate
    url: mcp/12traits-mcp.yml
  - type: Documentation
    url: https://cdn.solsten.io/assets/solsten_kpis_and_events_integration.pdf
common:
- type: Website
  url: https://solsten.io/
- type: DeveloperPortal
  url: https://docs.api.solsten.io/
- type: Documentation
  url: https://docs.api.solsten.io/
- type: APIReference
  url: https://docs.api.solsten.io/
- type: Login
  url: https://dashboard.solsten.io/
- type: Support
  url: https://solsten.io/contact
- type: Blog
  url: https://solsten.io/blog
- type: GitHubOrganization
  url: https://github.com/12traits
- type: TermsOfService
  url: https://solsten.io/terms-of-service
- type: PrivacyPolicy
  url: https://solsten.io/privacy-policy
- type: LLMsTxt
  url: llms/12traits-llms.txt
- type: Authentication
  url: authentication/12traits-authentication.yml
- type: Conventions
  url: conventions/12traits-conventions.yml
- type: ErrorCatalog
  url: errors/12traits-error-codes.yml
- type: DataModel
  url: data-model/12traits-data-model.yml
- type: RateLimits
  url: rate-limits/12traits-rate-limits.yml
- type: Plans
  url: plans/12traits-plans-pricing.yml
- type: Lifecycle
  url: lifecycle/12traits-lifecycle.yml
- type: Webhooks
  url: asyncapi/12traits-webhooks.yml
- type: Conformance
  url: conformance/12traits-conformance.yml
- type: Compliance
  url: conformance/12traits-conformance.yml
- type: Packages
  url: packages/12traits-packages.yml
- type: DomainSecurity
  url: security/12traits-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/12traits-vulnerability-disclosure.yml
- type: Security
  url: security/12traits-vulnerability-disclosure.yml
- type: LLMsTxt
  url: https://solsten.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-09-05'
  status: enriched
  artifacts_added: 17
  pass: local-v3

Solsten API — frequently asked questions

Does Solsten have an API?

Yes. APIs.io lists 1 API from Solsten, including Solsten API.

How do I authenticate with the Solsten API?

Solsten uses bearer-token authentication (2 schemes). The details are profiled on APIs.io as 12Traits Authentication.

Is the Solsten API ready for AI agents?

Solsten has a Kin Score of 40.8 out of 100 (developing) and an Agent Readiness score of 25.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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