ELSA website screenshot

ELSA

ELSA (English Language Speech Assistant) builds AI speech-recognition and pronunciation-assessment technology for non-native English speakers, powering the ELSA Speak consumer app. The ELSA API is a partner/B2B speech-assessment service that scores recorded or streamed English audio across pronunciation, fluency, intonation, grammar, and vocabulary, returning sentence, word, and phoneme-level feedback.

ELSA publishes 2 APIs on the APIs.io network: Scripted API and Unscripted API. Tagged areas include Speech Assessment, Pronunciation, Speech Recognition, Language Learning, and AI.

ELSA’s developer surface includes authentication, documentation, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
37.7/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessPaidSelf serve
2 APIs
Speech AssessmentPronunciationSpeech RecognitionLanguage LearningAI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 37.7/100 · thin
Contract Quality 14.2 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/elsa: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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

ELSA Scripted API

The Scripted API from ELSA — 1 operation(s) for scripted.

ELSA Unscripted API

The Unscripted API from ELSA — 1 operation(s) for unscripted.

Open Collections 1

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

ELSA Speech Assessment API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Elsa Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Elsa Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Elsa Finops

FINOPS

Security Posture 3

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

Elsa Authentication

apiKey · 1 scheme

SECURITY

Elsa Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Elsa Vulnerability Disclosure

disclosure policy published

SECURITY

Agentic Access 1

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

Elsa Agentic Access

2 operations · 2 acting

2 operations · 2 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

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
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: elsa
url: https://raw.githubusercontent.com/api-evangelist/elsa/refs/heads/main/apis.yml
name: ELSA
kind: company
description: ELSA (English Language Speech Assistant) builds AI speech-recognition and pronunciation-assessment technology
  for non-native English speakers, powering the ELSA Speak consumer app. The ELSA API is a partner/B2B speech-assessment service
  that scores recorded or streamed English audio across pronunciation, fluency, intonation, grammar, and vocabulary, returning
  sentence, word, and phoneme-level feedback.
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/elsa.png
tags:
- Speech Assessment
- Pronunciation
- Speech Recognition
- Language Learning
- AI
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.19'
apis:
- aid: elsa:elsa-scripted-api
  name: ELSA Scripted API
  description: The Scripted API from ELSA — 1 operation(s) for scripted.
  humanURL: https://api-external-doc.elsanow.co/
  baseURL: https://api.elsanow.io/api/v2
  tags:
  - Scripted
  properties:
  - type: OpenAPI
    url: openapi/elsa-scripted-api-openapi.yml
  - type: Documentation
    url: https://api-external-doc.elsanow.co/
  - type: APIReference
    url: https://api-external-doc.elsanow.co/category/api
  - type: Documentation
    url: https://api-external-doc.elsanow.co/websocket-scripted
  - type: Documentation
    url: https://api-external-doc.elsanow.co/websocket-unscripted
  - type: Documentation
    url: https://api-external-doc.elsanow.co/elsa/unscripted
- aid: elsa:elsa-unscripted-api
  name: ELSA Unscripted API
  description: The Unscripted API from ELSA — 1 operation(s) for unscripted.
  humanURL: https://api-external-doc.elsanow.co/
  baseURL: https://api.elsanow.io/api/v2
  tags:
  - Unscripted
  properties:
  - type: OpenAPI
    url: openapi/elsa-unscripted-api-openapi.yml
  - type: Documentation
    url: https://api-external-doc.elsanow.co/
  - type: APIReference
    url: https://api-external-doc.elsanow.co/category/api
  - type: Documentation
    url: https://api-external-doc.elsanow.co/websocket-scripted
  - type: Documentation
    url: https://api-external-doc.elsanow.co/websocket-unscripted
  - type: Documentation
    url: https://api-external-doc.elsanow.co/elsa/unscripted
common:
- type: AgenticAccess
  url: agentic-access/elsa-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/elsa-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/elsa-domain-security.yml
- type: Authentication
  url: authentication/elsa-authentication.yml
- type: GitHubOrganization
  url: https://github.com/elsa
- type: LinkedIn
  url: https://www.linkedin.com/company/elsacorp
- type: Website
  url: https://www.elsaspeak.com
- type: Documentation
  url: https://api-external-doc.elsanow.co/
- type: Plans
  url: plans/elsa-plans-pricing.yml
- type: RateLimits
  url: rate-limits/elsa-rate-limits.yml
- type: FinOps
  url: finops/elsa-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com