Telesign website screenshot

Telesign

Telesign provides a comprehensive suite of communications and security APIs enabling businesses to verify phone numbers, send SMS and voice messages, and assess fraud risk. Core offerings include SMS messaging, voice calls, multi-channel verification (OTP/MFA), phone number intelligence (PhoneID), reputation scoring, and silent verification. Telesign serves thousands of enterprises globally for account security, fraud prevention, and customer communications.

Telesign publishes 4 APIs on the APIs.io network, including Fraud Scoring API, Messaging API, Phone Intelligence API, and 1 more. Tagged areas include Authentication, Communications, Fraud Prevention, Phone Intelligence, and SMS.

The Telesign catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

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

🌐 Visit website 📡 Source on GitHub
51.3/100 developing ▼ -6.7 Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreeSelf serveFree trial⚡ Free to try
5 APIs
AuthenticationCommunicationsFraud PreventionPhone IntelligenceSMSVerification

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 51.3/100 · developing
Contract Quality 16.1 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 13.7 / 20
Operational Transparency 5.5 / 13
Governance 7.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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
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/telesign: 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 5

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

Telesign Voice API

Send voice messages including OTPs, alerts, and notifications to phone numbers worldwide. Supports text-to-speech message delivery and call status tracking.

Telesign Fraud Scoring API

Phone number reputation and fraud risk scoring

Telesign Messaging API

Send and track SMS messages

Telesign Phone Intelligence API

Phone number lookup and intelligence operations

Telesign Verification API

Create, retrieve, and update verification processes

Open Collections 4

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

Telesign PhoneID API

OPEN COLLECTION

Telesign Score API

OPEN COLLECTION

Telesign SMS API

OPEN COLLECTION

Telesign Verify API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Telesign Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Telesign Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Telesign Finops

FINOPS

Semantic Vocabularies 1

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

Telesign Context

3 classes · 5 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Telesign API Rules

6 rules · 5 warnings 1 info

SPECTRAL

Telesign API Rules

12 rules · 4 errors 7 warnings

SPECTRAL

JSON Schema 12

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

LocationInfo

7 properties

JSON SCHEMA

Telesign Messaging Response

2 properties

JSON SCHEMA

MessagingResponse

2 properties

JSON SCHEMA

NumberingInfo

2 properties

JSON SCHEMA

Telesign PhoneID Response

5 properties

JSON SCHEMA

PhoneIdResponse

5 properties

JSON SCHEMA

PhoneType

2 properties

JSON SCHEMA

RiskScore

3 properties

JSON SCHEMA

ScoreResponse

4 properties

JSON SCHEMA

TransactionStatus

3 properties

JSON SCHEMA

VerificationStatus

3 properties

JSON SCHEMA

VerifyResponse

2 properties

JSON SCHEMA

Scroll for all 12

JSON Structure 2

JSON Structure definitions describing this provider's data shapes.

Telesign Messaging Structure

0 properties

JSON STRUCTURE

Telesign Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

Telesign Create Verification Example

4 fields

EXAMPLE

Telesign Phoneid Lookup Example

4 fields

EXAMPLE

Telesign Send Sms Example

4 fields

EXAMPLE

Security Posture 3

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

Telesign Authentication

http · 1 scheme

SECURITY

Telesign Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Telesign Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

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

Telesign Agentic Access

7 operations · 5 acting

7 operations · 5 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal

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 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

StatusPage
StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: telesign
accessModel:
  pricing: free
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Free · 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/telesign.png
name: Telesign
description: Telesign provides a comprehensive suite of communications and security APIs enabling businesses to verify phone
  numbers, send SMS and voice messages, and assess fraud risk. Core offerings include SMS messaging, voice calls, multi-channel
  verification (OTP/MFA), phone number intelligence (PhoneID), reputation scoring, and silent verification. Telesign serves
  thousands of enterprises globally for account security, fraud prevention, and customer communications.
url: https://raw.githubusercontent.com/api-evangelist/telesign/refs/heads/main/apis.yml
modified: '2026-05-19'
specificationVersion: '0.19'
tags:
- Authentication
- Communications
- Fraud Prevention
- Phone Intelligence
- SMS
- Verification
apis:
- aid: telesign:voice-api
  name: Telesign Voice API
  description: Send voice messages including OTPs, alerts, and notifications to phone numbers worldwide. Supports text-to-speech
    message delivery and call status tracking.
  humanURL: https://developer.telesign.com/enterprise/docs/voice-get-started
  baseURL: https://rest-ww.telesign.com/v1
  tags:
  - OTP
  - Telecommunications
  - Voice
  properties:
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/voice-get-started
- aid: telesign:telesign-fraud-scoring-api
  name: Telesign Fraud Scoring API
  description: Phone number reputation and fraud risk scoring
  humanURL: https://developer.telesign.com/enterprise/docs/sms-get-started
  baseURL: https://rest-ww.telesign.com/v1
  tags:
  - Fraud Scoring
  properties:
  - type: OpenAPI
    url: openapi/telesign-fraud-scoring-api-openapi.yml
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/sms-get-started
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/phoneid-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/verify-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/score-api-overview
- aid: telesign:telesign-messaging-api
  name: Telesign Messaging API
  description: Send and track SMS messages
  humanURL: https://developer.telesign.com/enterprise/docs/sms-get-started
  baseURL: https://rest-ww.telesign.com/v1
  tags:
  - Messaging
  properties:
  - type: OpenAPI
    url: openapi/telesign-messaging-api-openapi.yml
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/sms-get-started
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/phoneid-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/verify-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/score-api-overview
- aid: telesign:telesign-phone-intelligence-api
  name: Telesign Phone Intelligence API
  description: Phone number lookup and intelligence operations
  humanURL: https://developer.telesign.com/enterprise/docs/sms-get-started
  baseURL: https://rest-ww.telesign.com/v1
  tags:
  - Phone Intelligence
  properties:
  - type: OpenAPI
    url: openapi/telesign-phone-intelligence-api-openapi.yml
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/sms-get-started
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/phoneid-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/verify-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/score-api-overview
- aid: telesign:telesign-verification-api
  name: Telesign Verification API
  description: Create, retrieve, and update verification processes
  humanURL: https://developer.telesign.com/enterprise/docs/sms-get-started
  baseURL: https://rest-ww.telesign.com/v1
  tags:
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/telesign-verification-api-openapi.yml
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/sms-get-started
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/phoneid-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/verify-api-overview
  - type: Documentation
    url: https://developer.telesign.com/enterprise/docs/score-api-overview
common:
- type: AgenticAccess
  url: agentic-access/telesign-agentic-access.yml
- type: TrustCenter
  url: security/telesign-trust-center.yml
- type: DomainSecurity
  url: security/telesign-domain-security.yml
- type: Authentication
  url: authentication/telesign-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/telesign
- type: Website
  url: https://www.telesign.com/
- type: DeveloperPortal
  url: https://developer.telesign.com/enterprise
- type: Authentication
  url: https://developer.telesign.com/enterprise/docs/authentication
- type: StatusPage
  url: https://status.telesign.com/
- type: Pricing
  url: https://www.telesign.com/pricing/
- type: TermsOfService
  url: https://www.telesign.com/terms-conditions/
- type: GitHubOrganization
  url: https://github.com/TeleSign
- type: Integrations
  url: https://www.telesign.com/partners
- type: Blog
  url: https://www.telesign.com/blog
integrations:
- name: Telesign
- name: referral
- name: Growth
- name: web tool set
- name: amplify icons
- name: shield
- name: suitcase
- name: Linkedin logo in white
- name: Facebook logo in white
- name: Youtube logo in white
- name: Proximus global white
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com