Telesign
Telesign provides a comprehensive suite of communications and security APIs enabling businesses to verify phone numbers, send SMS, omnichannel and voice messages, and assess fraud risk. The developer portal publishes 22 OpenAPI contracts (65 operations) covering SMS Verify, Voice Verify, Silent Verify, App Verify and the multi-channel Verify API; Messaging (SMS, WhatsApp, Viber, RCS, MMS, email), Voice, Number Masking and Bulk SMS; Phone ID, Intelligence Cloud and Email Intelligence risk signals; and Accounts, Deactivated Numbers, Flow Builder and Protect Platform management surfaces, plus an RFC 9727 API catalog and callback (webhook) payload contracts.
Telesign publishes 31 API contracts indexed on the APIs.io network, including Accounts API, Deactivated Numbers API, Email Intelligence API, and 28 more. Tagged areas include Authentication, Communications, Fraud Prevention, Phone Intelligence, and SMS.
The Telesign catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 2 Spectral governance rulesets.
Telesign’s developer surface includes changelog, authentication, pricing, engineering blog, documentation, API reference, getting-started guide, and 41 more developer resources.
What this lets a business do 1
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
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) | coverage | 30.3 | - | - |
| Communications (CPaaS) | coverage | 30.3 | - | - |
| Official SDKs on Package Registries | coverage | 29.7 | - | - |
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 31
Individual APIs this provider publishes, each with its own machine-readable definition.
Telesign Accounts API
Use this API to programmatically manage your Telesign accounts and their configurations.
Telesign Deactivated Numbers API
Encoding: Accepts only UTF-8 encoded unicode characters as inputs. The Deactivated Numbers API can be used to get lists of deactivated numbers. These can be used to ensure you d...
Telesign Email Intelligence API
Email Intelligence API (1 operations): Email Intelligence - Submit an email address to evaluate.
Telesign Flow Builder API
The Flow Builder solution is designed to streamline the creation, execution, and management of transactional flows. By leveraging business rules and data from both internal and ...
Telesign API Keys API
The API Keys API from Telesign — 2 operation(s) for api keys.
Telesign Bulk SMS API
The Bulk SMS API from Telesign — 1 operation(s) for bulk sms.
Telesign Bulk SMS Callbacks API
The Bulk SMS Callbacks API from Telesign — 1 operation(s) for bulk sms callbacks.
Telesign Calls API
The Calls API from Telesign — 1 operation(s) for calls.
Telesign Completions API
The Completions API from Telesign — 1 operation(s) for completions.
Telesign Delivery Reports API
The Delivery Reports API from Telesign — 2 operation(s) for delivery reports.
Telesign Email Intelligence Extended Response API
The Email Intelligence Extended Response API from Telesign — 1 operation(s) for email intelligence extended response.
Telesign Finalize API
The Finalize API from Telesign — 4 operation(s) for finalize.
Telesign Initiate API
The Initiate API from Telesign — 2 operation(s) for initiate.
Telesign Intelligence API
The Intelligence API from Telesign — 2 operation(s) for intelligence.
Telesign Messages API
The Messages API from Telesign — 1 operation(s) for messages.
Telesign Messaging API
The Messaging API from Telesign — 4 operation(s) for messaging.
Telesign Messaging Callbacks API
The Messaging Callbacks API from Telesign — 6 operation(s) for messaging callbacks.
Telesign Number Masking API
The Number Masking API from Telesign — 2 operation(s) for number masking.
Telesign One-time passcodes API
The One-time passcodes API from Telesign — 1 operation(s) for one-time passcodes.
Telesign Phone ID API
The Phone ID API from Telesign — 3 operation(s) for phone id.
Telesign Phone ID Contact API
The Phone ID Contact API from Telesign — 1 operation(s) for phone id contact.
Telesign Phone ID Number Deactivation API
The Phone ID Number Deactivation API from Telesign — 1 operation(s) for phone id number deactivation.
Telesign Protect API Authentication API
The Protect API Authentication API from Telesign — 1 operation(s) for protect api authentication.
Telesign Recordings API
The Recordings API from Telesign — 2 operation(s) for recordings.
Telesign SMS API
The SMS API from Telesign — 3 operation(s) for sms.
Telesign SMS Callbacks API
The SMS Callbacks API from Telesign — 1 operation(s) for sms callbacks.
Telesign Templates API
The Templates API from Telesign — 2 operation(s) for templates.
Telesign Templates Callbacks API
The Templates Callbacks API from Telesign — 1 operation(s) for templates callbacks.
Telesign Transaction Status API
The Transaction Status API from Telesign — 2 operation(s) for transaction status.
Telesign Verification Process API
The Verification Process API from Telesign — 3 operation(s) for verification process.
Telesign Voice API
The Voice API from Telesign — 1 operation(s) for voice.
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Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONMCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Telesign developer portal MCP server (ReadMe-hosted)
developer.telesign.com is a ReadMe-hosted portal and serves ReadMe's MCP endpoint at /mcp under Telesign's own documentation domain. An unauthenticated JSON-RPC tools/list is re...
MCP SERVERPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Telesign Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Telesign Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Telesign Webhooks
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Telesign Context
JSON-LDSpectral Rules 2
Spectral governance rulesets for linting and validating these APIs.
Telesign — jsonschema rules
SPECTRALTelesign API Rules
SPECTRALOpenAPI Overlays 21
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.
Telesign Accounts Api Overlay
GENERATEDTelesign App Verify Api Overlay
GENERATEDTelesign Deactivated Numbers Api Overlay
GENERATEDTelesign Detect Api Overlay
GENERATEDTelesign Email Intelligence Api Overlay
GENERATEDTelesign Engage Api Overlay
GENERATEDTelesign Engage Api Voice Overlay
GENERATEDTelesign Engage Callbacks Overlay
GENERATEDTelesign Flow Builder Api Overlay
GENERATEDTelesign Intelligence Cloud Api Overlay
GENERATEDTelesign Legacy Phone Id Api Overlay
GENERATEDTelesign Protect Platform Api Overlay
GENERATEDTelesign Silent Verify Api Overlay
GENERATEDTelesign Smart Verify Api Overlay
GENERATEDTelesign Sms Verify Api Overlay
GENERATEDTelesign Verify Api Callbacks Overlay
GENERATEDTelesign Verify Api Overlay
GENERATEDTelesign Voice Verify Api Overlay
GENERATEDScroll for all 21
JSON Schema 40
Standalone JSON Schema definitions for this provider's data models.
200-av-response
JSON SCHEMAAccountDetails
JSON SCHEMAAccount
JSON SCHEMAAction
JSON SCHEMACallerIDAVResponse
JSON SCHEMACarrier
JSON SCHEMADeactResFileList
JSON SCHEMAFinalizeAVResponse
JSON SCHEMAGetAVStatusResponse
JSON SCHEMAgetPhoneIdLiveResponse
JSON SCHEMAgetPhoneIdNDResponse
JSON SCHEMAgetPhoneIdResponse
JSON SCHEMAgetStatusResponse
JSON SCHEMAGET Verification Response
JSON SCHEMAInitiateAVResponse
JSON SCHEMANumMaskInputs
JSON SCHEMAOmniReqChannelObj
JSON SCHEMAOmniReqDetailsForRCS
JSON SCHEMAOmniReqDetailsForViber
JSON SCHEMAOmniReqDetailsForWA
JSON SCHEMAPATCH Verification State Change Request
JSON SCHEMAPatchVerificationStateResponse
JSON SCHEMApostEmailIDRequestBody
JSON SCHEMApostEmailIntResponse
JSON SCHEMApostPhoneIDRequestBody
JSON SCHEMApostScoreResponse
JSON SCHEMApostSMSSuccessResponse
JSON SCHEMAPOST Verification request
JSON SCHEMAPOST Verification Response
JSON SCHEMAputCompletionResponse
JSON SCHEMARecording
JSON SCHEMARecordingWithDetail
JSON SCHEMARestAPIKey
JSON SCHEMAScoreNumbering
JSON SCHEMAScorePhoneType
JSON SCHEMAsendVoiceCodeResponse
JSON SCHEMASharedResponseFields
JSON SCHEMAsharedResponseSchema
JSON SCHEMASIMSwapResponse
JSON SCHEMASVResponse
JSON SCHEMAScroll for all 40
JSON Structure 2
JSON Structure definitions describing this provider's data shapes.
Telesign Messaging Structure
JSON STRUCTURETelesign Structure
JSON STRUCTUREExamples 3
Example request and response payloads for these APIs.
Telesign Send Sms Example
EXAMPLESecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 3
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 3
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 11
Pagination, idempotency, versioning, errors, and events
Scroll for all 11
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 7
Authentication, authorization, and security posture
Scroll for all 7
Operate 6
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 4
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
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