Kaleyra website screenshot

Kaleyra

Kaleyra is a global omnichannel CPaaS provider (a Tata Communications company since October 2023) offering SMS, WhatsApp, RCS, Voice, Email, Verify (OTP), and Video communication APIs. Its REST APIs authenticate with an api-key header, address accounts by SID in the path, and are served from region-specific hosts for India, APAC, and EU data residency.

Kaleyra publishes 6 API contracts indexed on the APIs.io network, including Messages API, Verify API, Video API, and 3 more. Tagged areas include CPaaS, Messaging, SMS, WhatsApp, and Voice.

The Kaleyra catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Kaleyra’s developer surface includes authentication, changelog, getting-started guide, API reference, support, documentation, engineering blog, and 32 more developer resources.

🌐 Visit website📡 Profile data on GitHub
43.3/100 developing ▼ -7.0 Agent 26/100 agent aware Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0
AccessPaid
1 published contract
CPaaSMessagingSMSWhatsAppVoiceOTPIndia

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0
Composite quality — 43.3/100 · developing
Contract Quality 10.6 / 19
Developer Ergonomics 8.1 / 15
Access Clarity 3.2 / 15
Operational Transparency 4.9 / 10
Contract Governance 0.4 / 9
Discoverability 5.5 / 8
Regulatory Posture 3.5 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 26/100 · 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 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 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 Telecommunications 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/kaleyra: 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 →

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.

MarketPositionDepthRegistered MCP serverDeclares compatibility
Telecom Network APIs (CAMARA) coverage 33.2 - -
Communications (CPaaS) coverage 33.2 - -

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.

APIs 6

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

Kaleyra Email API

Send single and batch transactional email (Email API v2) with domain management, templates, webhooks, and delivery statistics.

Kaleyra Platform API

Account-level platform operations - subaccount management, billing, numbers provisioning, callback profiles, consent, and blocklist management.

Kaleyra Messages API

Send SMS, WhatsApp, and RCS messages and read their status.

Kaleyra Verify API

Generate and validate one-time passwords (OTP).

Kaleyra Video API

Kaleyra Video (WebRTC) room orchestration via REST.

Kaleyra Voice API

Click-to-call and outbound voice.

Postman Collections 4

Ready-to-run Postman collections for exercising this provider's APIs.

Kaleyra CPaaS Messages API

POSTMAN

Kaleyra CPaaS Messages Verify API

POSTMAN

Kaleyra CPaaS Messages Video API

POSTMAN

Kaleyra CPaaS Messages Voice API

POSTMAN

Open Collections 5

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

API Collection

OPEN COLLECTION

Kaleyra CPaaS Messages API

OPEN COLLECTION

Kaleyra CPaaS Messages Verify API

OPEN COLLECTION

Kaleyra CPaaS Messages Video API

OPEN COLLECTION

Kaleyra CPaaS Messages Voice API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Kaleyra Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Kaleyra Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Kaleyra Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Kaleyra Webhooks

ASYNCAPI

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Kaleyra Overlay

5 actions · update · kaleyra-openapi.yml

UNRECORDED

Security Posture 4

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

Kaleyra Authentication

apiKey · 1 scheme

SECURITY

Kaleyra Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Kaleyra Vulnerability Disclosure

security.txt · contact published

SECURITY

Kaleyra Trust Center

ISO 27001, SOC 2, GDPR, HIPAA, PCI DSS

SECURITY

Agentic Access 1

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

Kaleyra Agentic Access

7 operations · 5 acting

7 operations · 5 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

APIReference
APIReference
 Documentation
Documentation

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 WellKnown
WellKnown
 X-MCPServerCandidate
X-MCPServerCandidate
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 Components
Components
 DataModel
DataModel
 Webhooks
Webhooks

Scroll for all 7

Build 5

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace
PostmanWorkspace
 Packages
Packages
 SDKs
SDKs
 GitHubOrganization
GitHubOrganization
 Postman
Postman

Access & Security 6

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 Compliance
Compliance
 VulnerabilityDisclosure
VulnerabilityDisclosure
 Security
Security
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 4

Status, limits, changes, and where to get help

StatusPage
StatusPage
 ChangeLog
ChangeLog
 Support
Support
 RateLimits
RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: kaleyra
url: https://raw.githubusercontent.com/api-evangelist/kaleyra/refs/heads/main/apis.yml
name: Kaleyra
kind: company
description: Kaleyra is a global omnichannel CPaaS provider (a Tata Communications company since October 2023) offering SMS,
  WhatsApp, RCS, Voice, Email, Verify (OTP), and Video communication APIs. Its REST APIs authenticate with an api-key header,
  address accounts by SID in the path, and are served from region-specific hosts for India, APAC, and EU data residency.
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
  - url: https://www.kaleyra.com/
    status: 301
    note: declared website redirects to https://www.tatacommunications.com/kaleyra — a different registrable domain (kaleyra.com
      -> tatacommunications.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/kaleyra.png
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- CPaaS
- Messaging
- SMS
- WhatsApp
- Voice
- OTP
- India
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
apis:
- aid: kaleyra:kaleyra-email-api
  name: Kaleyra Email API
  tags:
  - Email
  - Transactional Email
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.kaleyra.io/reference/email-api-v2-overview
  baseURL: https://api.kaleyra.io
  properties:
  - url: https://developers.kaleyra.io/reference/email-api-v2-overview
    type: Documentation
  - url: https://developers.kaleyra.io/reference/email-api-v2-send-a-single-email
    type: APIReference
  description: Send single and batch transactional email (Email API v2) with domain management, templates, webhooks, and delivery
    statistics.
- aid: kaleyra:kaleyra-platform-api
  name: Kaleyra Platform API
  tags:
  - Platform
  - Subaccounts
  - Billing
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.kaleyra.io/reference/api-reference-overview
  baseURL: https://api.kaleyra.io
  properties:
  - url: https://developers.kaleyra.io/reference/api-reference-overview
    type: Documentation
  description: Account-level platform operations - subaccount management, billing, numbers provisioning, callback profiles,
    consent, and blocklist management.
- aid: kaleyra:kaleyra-messages-api
  name: Kaleyra Messages API
  description: Send SMS, WhatsApp, and RCS messages and read their status.
  humanURL: https://developers.kaleyra.io/docs/sms-api
  baseURL: https://api.kaleyra.io
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/kaleyra-messages-api-openapi.yml
  - type: Documentation
    url: https://developers.kaleyra.io/docs/sms-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/single-sms-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/whatsapp-api-v2-overview
  - type: APIReference
    url: https://developers.kaleyra.io/reference/whatsapp-messages-api-v2-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/rcs-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/voice-api
  - type: APIReference
    url: https://developers.kaleyra.io/docs/click-to-call-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/generating-otp
  - type: Documentation
    url: https://developers.kaleyra.io/reference/video-make-a-video-call-with-rest-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/video-v2-roomcall-postl
- aid: kaleyra:kaleyra-verify-api
  name: Kaleyra Verify API
  description: Generate and validate one-time passwords (OTP).
  humanURL: https://developers.kaleyra.io/docs/sms-api
  baseURL: https://api.kaleyra.io
  tags:
  - Verify
  properties:
  - type: OpenAPI
    url: openapi/kaleyra-verify-api-openapi.yml
  - type: Documentation
    url: https://developers.kaleyra.io/docs/sms-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/single-sms-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/whatsapp-api-v2-overview
  - type: APIReference
    url: https://developers.kaleyra.io/reference/whatsapp-messages-api-v2-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/rcs-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/voice-api
  - type: APIReference
    url: https://developers.kaleyra.io/docs/click-to-call-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/generating-otp
  - type: Documentation
    url: https://developers.kaleyra.io/reference/video-make-a-video-call-with-rest-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/video-v2-roomcall-postl
- aid: kaleyra:kaleyra-video-api
  name: Kaleyra Video API
  description: Kaleyra Video (WebRTC) room orchestration via REST.
  humanURL: https://developers.kaleyra.io/docs/sms-api
  baseURL: https://api.kaleyra.io
  tags:
  - Video
  properties:
  - type: OpenAPI
    url: openapi/kaleyra-video-api-openapi.yml
  - type: Documentation
    url: https://developers.kaleyra.io/docs/sms-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/single-sms-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/whatsapp-api-v2-overview
  - type: APIReference
    url: https://developers.kaleyra.io/reference/whatsapp-messages-api-v2-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/rcs-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/voice-api
  - type: APIReference
    url: https://developers.kaleyra.io/docs/click-to-call-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/generating-otp
  - type: Documentation
    url: https://developers.kaleyra.io/reference/video-make-a-video-call-with-rest-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/video-v2-roomcall-postl
- aid: kaleyra:kaleyra-voice-api
  name: Kaleyra Voice API
  description: Click-to-call and outbound voice.
  humanURL: https://developers.kaleyra.io/docs/sms-api
  baseURL: https://api.kaleyra.io
  tags:
  - Voice
  properties:
  - type: OpenAPI
    url: openapi/kaleyra-voice-api-openapi.yml
  - type: Documentation
    url: https://developers.kaleyra.io/docs/sms-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/single-sms-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/whatsapp-api-v2-overview
  - type: APIReference
    url: https://developers.kaleyra.io/reference/whatsapp-messages-api-v2-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/rcs-overview
  - type: Documentation
    url: https://developers.kaleyra.io/docs/voice-api
  - type: APIReference
    url: https://developers.kaleyra.io/docs/click-to-call-api
  - type: Documentation
    url: https://developers.kaleyra.io/docs/generating-otp
  - type: Documentation
    url: https://developers.kaleyra.io/reference/video-make-a-video-call-with-rest-api
  - type: APIReference
    url: https://developers.kaleyra.io/reference/video-v2-roomcall-postl
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/kaleyra/overview
- type: AgenticAccess
  url: agentic-access/kaleyra-agentic-access.yml
- type: TrustCenter
  url: security/kaleyra-trust-center.yml
- type: Compliance
  url: security/kaleyra-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/kaleyra-vulnerability-disclosure.yml
- type: Security
  url: https://www.kaleyra.com/security/
- type: DomainSecurity
  url: security/kaleyra-domain-security.yml
- type: Authentication
  url: authentication/kaleyra-authentication.yml
- type: Conformance
  url: conformance/kaleyra-conformance.yml
- type: Packages
  url: packages/kaleyra-packages.yml
- type: SDKs
  url: packages/kaleyra-packages.yml
- type: WellKnown
  url: well-known/kaleyra-well-known.yml
- type: X-MCPServerCandidate
  url: mcp/kaleyra-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/kaleyra-llms.txt
- type: Overlay
  url: overlays/kaleyra-overlay.yaml
- type: ErrorCatalog
  url: errors/kaleyra-error-codes.yml
- type: Lifecycle
  url: lifecycle/kaleyra-lifecycle.yml
- type: StatusPage
  url: https://status.kaleyra.io/
- type: Conventions
  url: conventions/kaleyra-conventions.yml
- type: ChangeLog
  url: changelog/kaleyra-changelog.yml
- type: Components
  url: components/kaleyra-components.yml
- type: DataModel
  url: data-model/kaleyra-data-model.yml
- type: Webhooks
  url: asyncapi/kaleyra-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://developers.kaleyra.io/
- type: GettingStarted
  url: https://developers.kaleyra.io/docs/kcloud-getting-started
- type: APIReference
  url: https://developers.kaleyra.io/reference/api-reference-overview
- type: Support
  url: https://support.kaleyra.com/
- type: GitHubOrganization
  url: https://github.com/kaleyra
- type: TermsOfService
  url: https://www.kaleyra.com/terms-conditions/
- type: PrivacyPolicy
  url: https://www.kaleyra.com/privacy-policy/
- type: Postman
  url: collections/kaleyra.postman_collection.json
- type: LinkedIn
  url: https://www.linkedin.com/company/kaleyra
- type: Website
  url: https://www.kaleyra.com/
- type: Documentation
  url: https://developers.kaleyra.io/
- type: Plans
  url: plans/kaleyra-plans-pricing.yml
- type: RateLimits
  url: rate-limits/kaleyra-rate-limits.yml
- type: FinOps
  url: finops/kaleyra-finops.yml
- url: https://www.kaleyra.com/blog/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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