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, SDKs, authentication, pricing, engineering blog, documentation, API reference, and 71 more developer resources.
What this lets a business do 2
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 | 31.8 | - | - |
| Communications (CPaaS) | coverage | 31.8 | - | - |
| Official SDKs on Package Registries | coverage | 31.8 | - | - |
| Official SDKs on Packagist, pub.dev and Hex | coverage | 31.8 | - | - |
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.
Standards implemented 2
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
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.
Scroll for all 31
MCP 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 SERVERAgent Skills 4
Packaged agent skills for driving this provider's APIs from an AI assistant.
telesign-phone-risk-check
AGENT SKILLtelesign-send-sms-message
AGENT SKILLtelesign-send-sms-otp
AGENT SKILLtelesign-silent-verify
AGENT SKILLTelesign API pricing
Prices published by Telesign, read 2026-10-07 from www.telesign.com/pricing/.
| Plan | Price |
|---|---|
| Free trial | Try for free |
| Pay-as-you-go | Pay-as-you-go |
| Volume discounts | Contact sales |
Plan details, limits and sources →
Rate limits
- Bulk SMS (Full-service): Bulk SMS 1
- Deactivated Numbers API (Full-service): Deactivated Numbers API 10
- Inbound SMS (Full-service): Inbound SMS 50
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Telesign Rate Limits
RATE LIMITSService Levels 1
Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.
Telesign
SLAFinOps 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
DERIVEDTelesign App Verify Api Overlay
DERIVEDTelesign Detect Api Overlay
DERIVEDTelesign Engage Api Overlay
DERIVEDTelesign Sms Verify Api Overlay
DERIVEDTelesign Verify Api Overlay
DERIVEDScroll 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 20
Reference material describing how the API behaves
Scroll for all 20
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 15
SDKs, sample code, and the tooling you integrate with
Scroll for all 15
Access & Security 6
Authentication, authorization, and security posture
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 5
Properties that don't map to a standard resource type
Source (apis.yml)
Telesign API — frequently asked questions
Does Telesign have an API?
Yes. APIs.io lists 31 APIs from Telesign, including Telesign Accounts API, Telesign Deactivated Numbers API and Telesign Email Intelligence API, and 28 more.
Is there an OpenAPI specification for the Telesign API?
Yes. APIs.io indexes 31 OpenAPI specifications for Telesign, each linked for download from this page.
How do I authenticate with the Telesign API?
Telesign uses bearer-token authentication (http/apiKey · 3 schemes). The details are profiled on APIs.io as Telesign Authentication.
How much does the Telesign API cost?
Telesign publishes its prices; its Free trial plan is Try for free as of 2026-10-07. APIs.io lists 3 pricing plans for Telesign, with each plan's price, limits and inclusions under Pricing on this page.
Does Telesign have an MCP server?
Yes. APIs.io lists 1 MCP server for Telesign: 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 refused with "Authorizati
Is the Telesign API ready for AI agents?
Telesign has a Kin Score of 76.9 out of 100 (exemplar) and an Agent Readiness score of 40.9 (agent-ready), scored by API Evangelist on 2026-11-06.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.