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 API contracts indexed on the APIs.io network: Scripted API and Unscripted API. Tagged areas include Speech Assessment, Pronunciation, Speech Recognition, Language Learning, and Artificial Intelligence.

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

ELSA’s developer surface includes pricing, engineering blog, authentication, documentation, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.0/100 thin ▬ flat Agent 18/100 agent aware Front door AI 6/6 dominant Heartbeat 5/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract

Speech AssessmentPronunciation Speech Recognition Language Learning Artificial Intelligence

Kin Score

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

Composite quality — 36.0/100 · thin

Contract Quality 9.0 / 19

Developer Ergonomics 4.7 / 15

Access Clarity 5.5 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 18/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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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
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
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

9 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 31.0 — up to +13.8 composite points
Contract Quality scores 47.8 — up to +13.1 composite points
Access Clarity scores 36.8 — up to +12.6 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/elsa/apis.yml: open an issue on github.com/api-evangelist/elsa 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Zoom App Marketplace and Partner Ecosystem (builders and partners on Zoom)	builds-on	34.5 (thin)	-	-
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	builds-on	34.5 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 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 3

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

ELSA Speech Assessment Scripted API

OPEN COLLECTION

ELSA Speech Assessment Scripted Unscripted API

OPEN COLLECTION

ELSA Speech Assessment API

OPEN COLLECTION

ELSA API pricing

Prices published by ELSA, read 2026-10-07 from elsaspeak.com/en/enterprise/pricing.

Plan	Price
Team (ELSA Business)	$342 Includes: 2-49 users; AI-powered speaking practice, instant personalized feedback, workplace-ready learning co
Enterprise (ELSA Business)	Custom pricing Includes: 50+ users; everything in Team plus custom learning experiences, SSO, LMS integration, APIs, enterpri
ELSA Speak School Plan	Custom pricing Includes: 21+ users; K-12 learning, admin dashboard, student progress reporting, limited API access

Plan details, limits and sources →

Rate limits

Max Audio Duration Per Request (Standard): ~20s scripted / ~20s unscripted audio seconds
Max Audio Duration Per Request (Premium): ~45s scripted / ~150s unscripted audio seconds
Requests Per Minute: see partner agreement requests

Compiled by API Evangelist, not yet checked against ELSA's documentation. All 4 limits →

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

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

ELSA

SLA

FinOps 1

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

Elsa Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

ELSA API Rules

46 rules · 44 errors 1 warnings 1 info

SPECTRAL

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

no policy recorded

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 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 4

The organization behind the API

Blog

Blog

BlogRSS

BlogRSS

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: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/elsa.png
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
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: '2026-10-06'
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: Pricing
  url: https://elsaspeak.com/en/enterprise/pricing
- url: https://blog.elsaspeak.com/en/
  type: Blog
- url: https://blog.elsaspeak.com/en/feed/
  type: BlogRSS
- 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

ELSA API — frequently asked questions

Does ELSA have an API?

Yes. APIs.io lists 2 APIs from ELSA, including ELSA Scripted API and ELSA Unscripted API.

Is there an OpenAPI specification for the ELSA API?

Yes. APIs.io indexes 2 OpenAPI specifications for ELSA, each linked for download from this page.

How do I authenticate with the ELSA API?

ELSA uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Elsa Authentication.

How much does the ELSA API cost?

ELSA publishes its prices; its Team (ELSA Business) plan is $342 as of 2026-10-07. APIs.io lists 3 pricing plans for ELSA, with each plan's price, limits and inclusions under Pricing on this page.

Is the ELSA API ready for AI agents?

ELSA has a Kin Score of 36.0 out of 100 (thin) and an Agent Readiness score of 17.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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