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 4 APIs on the APIs.io network, including Messages API, Verify API, Video API, and 1 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 31 more developer resources.

🌐 Visit website 📡 Source on GitHub

67.3/100 strong ▬ flat Agent 82/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessPaidSelf serve

6 APIs 1 MCP Servers

CPaaSMessagingSMSWhatsAppVoiceOTPIndia

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 67.3/100 · strong

Contract Quality 17.2 / 25

Developer Ergonomics 15.7 / 20

Commercial Clarity 13.2 / 20

Operational Transparency 11.3 / 13

Governance 0.0 / 12

Discoverability 10.0 / 10

Agent readiness — 82/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 15 / 15

MCP Server 12 / 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 4 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. 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. Want it done for you? Prioritized profiling — $2,500 →

APIs 6

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

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.

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

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

Components

DataModel

Webhooks

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

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

ChangeLog

Support

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

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.
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/kaleyra.png
tags:
- CPaaS
- Messaging
- SMS
- WhatsApp
- Voice
- OTP
- India
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.19'
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:
  - 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: 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: MCPServer
  url: mcp/kaleyra-mcp.yml
- 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

Kaleyra

Kin Score

APIs 6

Kaleyra Email API

Kaleyra Platform API

Kaleyra Messages API

Kaleyra Verify API

Kaleyra Video API

Kaleyra Voice API

MCP Servers 1

kaleyra-mcp.yml

Pricing Plans 1

Kaleyra Plans Pricing

Rate Limits 1

Kaleyra Rate Limits

FinOps 1

Kaleyra Finops

Event Specifications 1

Kaleyra Webhooks

Security Posture 4

Kaleyra Authentication

Kaleyra Domain Security

Kaleyra Vulnerability Disclosure

Kaleyra Trust Center

Agentic Access 1

Kaleyra Agentic Access

Resources