Kaption AI

Kaption AI offers a Chrome and Edge extension and a desktop app that embed AI tools directly into WhatsApp Web. The product provides automatic transcription and summarisation of voice notes, live translation in 36 languages, call recording with transcripts, encrypted backups, scheduled messages, reminders, and AI assistants that can search and summarise chats. It is marketed to professionals such as lawyers, doctors, real‑estate agents, import/export specialists and sales teams.

Kaption AI publishes 1 API contract indexed on the APIs.io network: MCP API. Tagged areas include AI Assistant, Transcription, Call Recording, Translation, and Scheduling.

The Kaption AI catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Kaption AI’s developer surface includes changelog, authentication, documentation, API reference, getting-started guide, support, engineering blog, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

54.2/100 developing Agent 47/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumApproval

1 published contract 1 Agent Skills

AI Assistant Transcription Call Recording Translation Scheduling Backups

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 54.2/100 · developing

Contract Quality 14.3 / 21

Developer Ergonomics 10.0 / 17

Access Clarity 8.7 / 17

Operational Transparency 1.6 / 11

Contract Governance 3.6 / 10

Discoverability 6.5 / 9

Regulatory Posture 4.3 / 15

Agent readiness — 47/100 · agent ready

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 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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 AI & Biometrics 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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 Ask about this →
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) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

3 more unmet checks in the Agent Readiness table above.

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

Operational Transparency scores 14.3 — up to +11.1 composite points Ask about this →
Access Clarity scores 51.1 — up to +9.8 composite points Ask about this →
Developer Ergonomics scores 58.9 — up to +8.2 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/kaptionai-com/apis.yml: open an issue on github.com/api-evangelist/kaptionai-com 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 3

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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Kaption AI MCP API

MCP transport endpoints

Agent Skills 1

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

kaptionai-com-mcp-send-and-end

AGENT SKILL

Kaption AI API pricing

Prices published by Kaption AI, read 2026-11-13 from kaptionai.com/pricing/.

Plan	Price
Free	US$0
Lifetime local AI	US$79 once in your first 60 days, US$99 after
Pro – Monthly	US$11.99 per month
Business – Monthly	US$19.99 per month
Business Agent	Coming in November

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Kaption AI Plans Pricing

5 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Kaptionai Com Context

6 classes · 18 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Kaption AI API Rules

71 rules · 67 error-severity 2 warn-severity 2 info-severity

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

JsonRpcRequest

4 properties

JSON SCHEMA

SseStream

0 properties

JSON SCHEMA

Security Posture 2

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

Kaption AI Authentication

2 schemes

SECURITY

Kaption AI Domain Security

TLSv1.3

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Kaption AI Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Agentic Access (API Evangelist recommendations) 1

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

Kaption AI Agentic Access

5 operations · 3 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: kaptionai-com
name: Kaption AI
accessModel:
  pricing: freemium
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Freemium · Requires approval
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kaptionai.com/og/home-en.png?v=2
description: Kaption AI offers a Chrome and Edge extension and a desktop app that embed AI tools directly into WhatsApp Web.
  The product provides automatic transcription and summarisation of voice notes, live translation in 36 languages, call recording
  with transcripts, encrypted backups, scheduled messages, reminders, and AI assistants that can search and summarise chats.
  It is marketed to professionals such as lawyers, doctors, real‑estate agents, import/export specialists and sales teams.
url: https://artifacts.apis.io/kaptionai-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-13 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-13'
modified: '2026-11-13'
tags:
- AI Assistant
- Transcription
- Call Recording
- Translation
- Scheduling
- Backups
tags_raw:
- AI Assistants
- Transcription
- Call Recording
- Translation
- Scheduling
- Backups
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/kaptionai-com-agentic-access.yml
- type: Plans
  url: plans/kaptionai-com-plans-pricing.yml
- type: Spectral
  url: rules/kaptionai-com-rules.yml
- type: JSONLD
  url: json-ld/kaptionai-com-context.jsonld
- type: Vocabulary
  url: vocabulary/kaptionai-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/kaptionai-com-data-model.yml
- type: ChangeLog
  url: changelog/kaptionai-com-changelog.yml
- type: Authentication
  url: authentication/kaptionai-com-authentication.yml
- type: ErrorCatalog
  url: errors/kaptionai-com-problem-types.yml
- type: Conformance
  url: conformance/kaptionai-com-conformance.yml
- type: LLMsTxt
  url: llms/kaptionai-com-llms.txt
- type: WellKnown
  url: well-known/kaptionai-com-well-known.yml
- type: Hosts
  url: hosts/kaptionai-com-hosts.yml
- type: Vendors
  url: vendors/kaptionai-com-vendors.yml
- type: ChangeLog
  url: https://kaptionai.com/changelog/
- type: OAuthScopes
  url: scopes/kaptionai-com-scopes.yml
- type: DomainSecurity
  url: security/kaptionai-com-domain-security.yml
- type: Website
  url: https://kaptionai.com/
- type: DeveloperPortal
  url: https://kaptionai.com/developers/
- type: Documentation
  url: https://kaptionai.com/developers/
- type: APIReference
  url: https://kaptionai.com/openapi.json
- type: GettingStarted
  url: https://kaptionai.com/pricing/
- type: Support
  url: https://kaptionai.com/contact/
- type: Blog
  url: https://kaptionai.com/blog/en/
- type: Pricing
  url: https://kaptionai.com/pricing/
- type: TermsOfService
  url: https://kaptionai.com/terms/
- type: PrivacyPolicy
  url: https://kaptionai.com/privacy/
apis:
- aid: kaptionai-com:kaptionai-com-mcp-api
  name: Kaption AI MCP API
  description: MCP transport endpoints
  humanURL: https://kaptionai.com/developers/
  baseURL: https://mcp.kaptionai.com
  tags:
  - MCP
  tags_raw:
  - mcp
  properties:
  - type: OpenAPI
    url: openapi/kaptionai-com-mcp-api-openapi.yml
  - type: JSONSchema
    url: json-schema/kaptionai-com-json-rpc-request-schema.json
  - type: JSONSchema
    url: json-schema/kaptionai-com-sse-stream-schema.json
x-enrichment:
  date: '2026-11-13'
  status: enriched
  artifacts_added: 28
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Kaption AI API — frequently asked questions

Does Kaption AI have an API?

Yes. APIs.io lists 1 API from Kaption AI, including Kaption AI MCP API.

Is there an OpenAPI specification for the Kaption AI API?

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

How do I authenticate with the Kaption AI API?

Kaption AI documents its authentication (2 schemes). The details are profiled on APIs.io as Kaption AI Authentication.

How much does the Kaption AI API cost?

Kaption AI publishes its prices; its Free plan is US$0 as of 2026-11-13. APIs.io lists 5 pricing plans for Kaption AI, with each plan's price, limits and inclusions under Pricing on this page.

Is the Kaption AI API ready for AI agents?

Kaption AI has a Kin Score of 54.2 out of 100 (developing) and an Agent Readiness score of 46.7 (agent-ready), scored by API Evangelist on 2026-11-13.

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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