Riiid

Riiid (now operating as Socra AI) is an AI education technology company whose proprietary deep-knowledge-tracing and score-prediction models power adaptive learning. Its consumer product Santa (AI TOEIC / TOEFL test prep) and its R.Inside AI-as-a-Service offering bring real-time student modeling to partners. Riiid does not publish a public, self-serve developer API; its AI is delivered through B2B partner integrations and packaged products.

Riiid publishes 4 APIs on the APIs.io network, including Adaptive Learning, Knowledge Tracing, Santa, and 1 more. Tagged areas include Artificial Intelligence, Education, Adaptive Learning, Knowledge Tracing, and EdTech.

Riiid’s developer surface includes documentation and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

23.8/100 emerging ▬ flat Agent 16/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Artificial Intelligence Education Adaptive LearningKnowledge TracingEdTech

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 23.8/100 · emerging

Contract Quality 5.9 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 7.2 / 17

Operational Transparency 2.6 / 11

Contract Governance 0.0 / 10

Discoverability 5.0 / 9

Regulatory Posture 1.7 / 15

Agent readiness — 16/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 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

Regulatory Posture applies to this provider. Its tags matched the Education & Research 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/.

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 github.com/api-evangelist/riiid: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

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

Riiid Adaptive Learning

Riiid's adaptive learning engine analyzes learner interaction data in real time to recommend personalized study paths and content. It is delivered inside Riiid/Socra products (S...

Riiid Knowledge Tracing

Proprietary deep knowledge tracing and score-prediction models (built on 100M+ student interactions, the EdNet dataset) estimate a learner's mastery and predict test outcomes in...

Riiid Santa

Santa is Riiid's consumer AI tutor app for standardized English tests (TOEIC, and TOEFL via an ETS content partnership). It is distributed as iOS / Android mobile applications w...

Riiid Partner Solutions

B2B / AI-as-a-Service (R.Inside) engagements that embed Riiid's adaptive learning and knowledge-tracing AI into partner education platforms. Access is sales-led and contract-bas...

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Riiid API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Riiid Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Riiid Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Riiid Finops

FINOPS

Security Posture 1

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

Riiid Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: riiid
url: https://raw.githubusercontent.com/api-evangelist/riiid/refs/heads/main/apis.yml
x-api-posture: partner-gated
x-api-posture-basis: observed
name: Riiid
kind: company
description: Riiid (now operating as Socra AI) is an AI education technology company whose proprietary deep-knowledge-tracing
  and score-prediction models power adaptive learning. Its consumer product Santa (AI TOEIC / TOEFL test prep) and its R.Inside
  AI-as-a-Service offering bring real-time student modeling to partners. Riiid does not publish a public, self-serve developer
  API; its AI is delivered through B2B partner integrations and packaged products.
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - pricing
  - repository-unlicensed
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - plans
  - url: https://www.riiid.com
    status: 301
    note: declared website redirects to https://corp.socra.ai/ — a different registrable domain (riiid.com -> socra.ai), possible
      rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/riiid.png
tags:
- Artificial Intelligence
- Education
- Adaptive Learning
- Knowledge Tracing
- EdTech
tags_raw:
- AI
- Education
- Adaptive Learning
- Knowledge Tracing
- EdTech
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.23'
apis:
- aid: riiid:adaptive-learning
  name: Riiid Adaptive Learning
  tags:
  - Adaptive Learning
  - Personalization
  - Recommendation
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://corp.socra.ai/
  properties:
  - url: https://corp.socra.ai/
    type: Documentation
  - url: openapi/_original/riiid-openapi.yml
    type: OpenAPI
  description: Riiid's adaptive learning engine analyzes learner interaction data in real time to recommend personalized study
    paths and content. It is delivered inside Riiid/Socra products (Santa) and to partners via integration, not as a documented
    public self-serve API.
- aid: riiid:knowledge-tracing
  name: Riiid Knowledge Tracing
  tags:
  - Knowledge Tracing
  - Score Prediction
  - Deep Learning
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://corp.socra.ai/
  properties:
  - url: https://corp.socra.ai/
    type: Documentation
  - url: https://github.com/riiid/ednet
    type: SourceCode
  - url: openapi/_original/riiid-openapi.yml
    type: OpenAPI
  description: Proprietary deep knowledge tracing and score-prediction models (built on 100M+ student interactions, the EdNet
    dataset) estimate a learner's mastery and predict test outcomes in real time. Exposed through Riiid products and partner
    solutions; no public API endpoint is documented.
- aid: riiid:santa
  name: Riiid Santa
  tags:
  - Santa
  - Test Prep
  - TOEIC
  - TOEFL
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://apps.apple.com/us/app/santa-ai-toeic/id1148006701
  properties:
  - url: https://corp.socra.ai/
    type: Documentation
  - url: https://apps.apple.com/us/app/santa-ai-toeic/id1148006701
    type: Signup
  - url: openapi/_original/riiid-openapi.yml
    type: OpenAPI
  description: Santa is Riiid's consumer AI tutor app for standardized English tests (TOEIC, and TOEFL via an ETS content
    partnership). It is distributed as iOS / Android mobile applications with no documented public developer API.
- aid: riiid:partner-solutions
  name: Riiid Partner Solutions
  tags:
  - Partner Solutions
  - AIaaS
  - B2B
  - R.Inside
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://corp.socra.ai/
  properties:
  - url: https://corp.socra.ai/
    type: Documentation
  - url: openapi/_original/riiid-openapi.yml
    type: OpenAPI
  description: B2B / AI-as-a-Service (R.Inside) engagements that embed Riiid's adaptive learning and knowledge-tracing AI
    into partner education platforms. Access is sales-led and contract-based via partnership@socra.ai; no public self-serve
    API is published.
common:
- type: DomainSecurity
  url: security/riiid-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/riiid
- type: LinkedIn
  url: https://www.linkedin.com/company/riiid
- type: Website
  url: https://www.riiid.com
- type: Documentation
  url: https://corp.socra.ai/
- type: Plans
  url: plans/riiid-plans-pricing.yml
- type: RateLimits
  url: rate-limits/riiid-rate-limits.yml
- type: FinOps
  url: finops/riiid-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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