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 and 1 Spectral governance ruleset.

Kaleyra’s developer surface includes authentication, changelog, getting-started guide, API reference, support, documentation, engineering blog, and 33 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.6/100 developing ▬ flat Agent 27/100 agent aware Front door AI 6/6 dominant Heartbeat 50/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 4 Agent Skills

CPaaS Messaging SMS WhatsApp Voice OTP India

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Application Identity & Verification

AE-160

Verify

POST /v1/{sid}/verify GET /v1/{sid}/verify/validate

Kin Score

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

Composite quality — 47.6/100 · developing

Contract Quality 10.6 / 19

Developer Ergonomics 10.1 / 15

Access Clarity 3.2 / 15

Operational Transparency 4.9 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 3.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 27/100 · 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

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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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)
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
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 21.1 — up to +15.8 composite points
Contract Quality scores 56.7 — up to +10.8 composite points
Contract Governance scores 18.2 — up to +9.8 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/kaleyra/apis.yml: open an issue on github.com/api-evangelist/kaleyra 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
Telecom Network APIs (CAMARA)	builds-on	42.5	-	-
Communications (CPaaS)	builds-on	42.5	-	-

Not yet checked against Kaleyra's own pricing page. Compiled by API Evangelist on 2026-07-17 from www.kaleyra.com/; confirm before you rely on a figure.

Plan	Price
Usage-Based (Quote) usage	—
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

API Requests Per Second: see provider documentation requests
SMS Send Throughput (TPS): see provider documentation messages
WhatsApp Messaging Tier: governed by Meta messaging tier conversations

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

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

Service Levels 1

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

Kaleyra

SLA

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

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Kaleyra API Rules

66 rules · 63 errors 1 warnings 2 info

SPECTRAL

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

DERIVED

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

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

ErrorCatalog

Lifecycle

Conventions

Components

DataModel

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

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 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

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.
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: '2026-11-06'
  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: CapabilityMap
  url: capabilities/kaleyra-capability-edges.yml
  name: Kaleyra Business Capability Map
- 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

Kaleyra API — frequently asked questions

Does Kaleyra have an API?

Yes. APIs.io lists 6 APIs from Kaleyra, including Kaleyra Email API, Kaleyra Platform API and Kaleyra Messages API, and 3 more.

Is there an OpenAPI specification for the Kaleyra API?

Yes. APIs.io indexes 4 OpenAPI specifications for Kaleyra, each linked for download from this page.

How do I authenticate with the Kaleyra API?

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

How much does the Kaleyra API cost?

APIs.io lists 2 pricing plans for Kaleyra, with each plan's price, limits and inclusions under Pricing on this page.

Is the Kaleyra API ready for AI agents?

Kaleyra has a Kin Score of 47.6 out of 100 (developing) and an Agent Readiness score of 26.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
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get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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