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 Artificial Intelligence.

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

🌐 Visit website 📡 Source on GitHub

35.0/100 thin ▬ flat Agent 20/100 agent aware Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessPaid

1 APIs

Speech AssessmentPronunciation Speech Recognition Language Learning Artificial Intelligence

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 35.0/100 · thin

Contract Quality 9.0 / 19

Developer Ergonomics 4.3 / 15

Access Clarity 5.4 / 15

Operational Transparency 3.0 / 10

Contract Governance 0.0 / 9

Discoverability 5.0 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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

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 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/elsa: 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 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 4

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

API Collection

OPEN COLLECTION

ELSA Speech Assessment Scripted API

OPEN COLLECTION

ELSA Speech Assessment Scripted Unscripted API

OPEN COLLECTION

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

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

Website

Website

Source (apis.yml)

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.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/elsa.png
tags:
- Speech Assessment
- Pronunciation
- Speech Recognition
- Language Learning
- Artificial Intelligence
tags_raw:
- Speech Assessment
- Pronunciation
- Speech Recognition
- Language Learning
- AI
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.23'
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

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