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

37.5/100 thin ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessPaid

1 APIs

Speech AssessmentPronunciation Speech Recognition Language Learning Artificial Intelligence

Kin Score

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

Composite quality — 37.5/100 · thin

Contract Quality 11.9 / 23

Developer Ergonomics 5.1 / 18

Access Clarity 7.1 / 18

Operational Transparency 4.0 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

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

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.

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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