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 API contracts indexed 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 engineering blog, documentation, and 7 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.9/100 emerging ▬ flat Agent 14/100 agent aware Front door AI 4/6 moderate Heartbeat 59/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessEnterprisePartner gated

1 published contract

Artificial Intelligence Education Adaptive LearningKnowledge TracingEdTech

Kin Score

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

Composite quality — 18.9/100 · emerging

Contract Quality 6.8 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 3.1 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 0.8 / 15

Agent readiness — 14/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

11 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 11.9 — up to +17.6 composite points
Contract Quality scores 32.1 — up to +17.0 composite points
Access Clarity scores 18.4 — up to +16.3 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/riiid/apis.yml: open an issue on github.com/api-evangelist/riiid 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 →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

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 1

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

Riiid API

OPEN COLLECTION

Riiid API pricing

Not yet checked against Riiid's own pricing page. Compiled by API Evangelist on 2026-06-21 from www.riiid.com; confirm before you rely on a figure.

Plan	Price
Santa (Consumer App) subscription	—
Partner Solutions / R.Inside (AIaaS) enterprise	—

Plan details, limits and sources →

Rate limits

Public API Rate Limits: not applicable - no public API requests
Partner Integration Limits: see partner contract requests

Compiled by API Evangelist, not yet checked against Riiid's documentation. Rate-limit details →

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 3

The organization behind the API

Blog

Blog

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: saas
  license_evidence:
    not_product:
    - riiid/ednet
  open_source: unknown
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  gated: partner
  gated_source:
  - x-api-posture
  label: Enterprise
  confidence: low
  source:
  - plans
  - security
  - 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: '2026-11-06'
  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: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: riiid:adaptive-learning
  name: Riiid Adaptive Learning
  tags:
  - Adaptive Learning
  - Personalization
  - Recommendations
  tags_raw:
  - 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:
- url: https://corp.socra.ai/stories
  type: Blog
- 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

Riiid API — frequently asked questions

Does Riiid have an API?

Yes. APIs.io lists 4 APIs from Riiid, including Riiid Adaptive Learning, Riiid Knowledge Tracing and Riiid Santa, and 1 more.

Is there an OpenAPI specification for the Riiid API?

Yes. APIs.io indexes 4 OpenAPI specifications for Riiid, each linked for download from this page.

How much does the Riiid API cost?

APIs.io lists 2 pricing plans for Riiid, with each plan's price, limits and inclusions under Pricing on this page.

Is the Riiid API ready for AI agents?

Riiid has a Kin Score of 18.9 out of 100 (emerging) and an Agent Readiness score of 13.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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