Preply

Preply is a global online language-learning marketplace that connects learners with private tutors across dozens of languages, offering one-on-one video lessons, flexible scheduling and a satisfaction-backed tutor-replacement guarantee. Alongside its consumer marketplace, Preply runs Preply Business, an enterprise language-training offering with SSO, automated user provisioning and LMS integrations. Preply exposes a small public, unauthenticated tutor-search API (originally published as an OpenAI/ChatGPT plugin) that lets applications and agents search tutors by subject, price, availability and language and fetch individual tutor profiles. This profile was enriched by the API Evangelist pipeline from Preply's public surface.

Preply publishes 1 API contract indexed on the APIs.io network: Chatgpt Openapi API. Tagged areas include Company, Education, Language Learning, Tutoring, and Marketplace.

The Preply catalog on APIs.io includes 1 Spectral governance ruleset.

Preply’s developer surface includes engineering blog, support, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

37.2/100 thin ▬ flat Agent 21/100 agent aware Front door AI 1/6 silent Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company Education Language Learning Tutoring Marketplace EdTech Search

Kin Score

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

Composite quality — 37.2/100 · thin

Contract Quality 9.2 / 21

Developer Ergonomics 1.5 / 17

Access Clarity 9.7 / 17

Operational Transparency 2.3 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 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
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 8.9 — up to +18.2 composite points
Contract Quality scores 43.5 — up to +14.1 composite points
Operational Transparency scores 21.1 — up to +10.3 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/preply/apis.yml: open an issue on github.com/api-evangelist/preply 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 1

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

Preply Chatgpt Openapi API

The Chatgpt Openapi API from Preply — 2 operation(s) for chatgpt openapi.

Open Collections 1

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

Preply plugin Chatgpt Openapi API

OPEN COLLECTION

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

Find a Preply tutor

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Preply API Rules

39 rules · 37 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Preply Openapi Overlay

3 actions · documentation · preply-openapi-original.json

DERIVED

Security Posture 2

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

Preply Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Preply Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Preply Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

X-MCPServerCandidate

LLMsTxt

WellKnown

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Lifecycle

Lifecycle

Access & Security 4

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: preply
name: Preply
description: Preply is a global online language-learning marketplace that connects learners with private tutors across dozens
  of languages, offering one-on-one video lessons, flexible scheduling and a satisfaction-backed tutor-replacement guarantee.
  Alongside its consumer marketplace, Preply runs Preply Business, an enterprise language-training offering with SSO, automated
  user provisioning and LMS integrations. Preply exposes a small public, unauthenticated tutor-search API (originally published
  as an OpenAI/ChatGPT plugin) that lets applications and agents search tutors by subject, price, availability and language
  and fetch individual tutor profiles. This profile was enriched by the API Evangelist pipeline from Preply's public surface.
url: https://raw.githubusercontent.com/api-evangelist/preply/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- point-nine
- techstars
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://static.preply.com/ds/icons/favicon-ua.ico
tags:
- Company
- Education
- Language Learning
- Tutoring
- Marketplace
- EdTech
- Search
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: preply:preply-chatgpt-openapi-api
  name: Preply Chatgpt Openapi API
  description: The Chatgpt Openapi API from Preply — 2 operation(s) for chatgpt openapi.
  humanURL: https://preply.com
  baseURL: https://preply.com/api/chatgpt_openapi
  tags:
  - Chatgpt Openapi
  properties:
  - type: OpenAPI
    url: openapi/preply-chatgpt-openapi-api-openapi.yml
  - type: DataModel
    url: data-model/preply-data-model.yml
  - type: ErrorCatalog
    url: errors/preply-problem-types.yml
  - type: Conventions
    url: conventions/preply-conventions.yml
common:
- type: AgentSkill
  url: skills/preply-find-a-tutor.md
- type: Overlay
  url: overlays/preply-openapi-overlay.yaml
- type: Website
  url: https://preply.com
- type: Blog
  url: https://preply.com/en/blog/
- type: Support
  url: https://help.preply.com/en/
- type: StatusPage
  url: https://status.preply.com
- type: TermsOfService
  url: https://termsofuse.preply.com/terms_of_use/en_TermsOfService.pdf
- type: PrivacyPolicy
  url: https://termsofuse.preply.com/terms_of_use/en_PrivacyPolicy.pdf
- type: X-MCPServerCandidate
  url: mcp/preply-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/preply-llms.txt
- type: WellKnown
  url: well-known/preply-well-known.yml
- type: SecurityTxt
  url: well-known/preply-security.txt
- type: Conformance
  url: conformance/preply-conformance.yml
- type: Lifecycle
  url: lifecycle/preply-lifecycle.yml
- type: AgenticAccess
  url: agentic-access/preply-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/preply-vulnerability-disclosure.yml
- type: Security
  url: https://preply.com/.well-known/security.txt
- type: DomainSecurity
  url: security/preply-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 17
  pass: local-v1

Preply API — frequently asked questions

Does Preply have an API?

Yes. APIs.io lists 1 API from Preply, including Preply Chatgpt Openapi API.

Is there an OpenAPI specification for the Preply API?

Yes. APIs.io indexes 1 OpenAPI specification for Preply, each linked for download from this page.

Is the Preply API ready for AI agents?

Preply has a Kin Score of 37.2 out of 100 (thin) and an Agent Readiness score of 20.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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