Sinch Verification API

The Sinch Verification API (Sinch Verify) is a dedicated phone number verification product for confirming that a user controls a given mobile number - the core of OTP, two-factor authentication (2FA), and anti-fraud sign-up flows. It supports four verification methods: SMS (one-time passcode), flash call (a missed call whose caller ID is the code), phone call / callout (a spoken or key-press code), and data (seamless / silent verification over the mobile data connection). A verification is started from your backend, the code or caller ID is reported back, and Sinch returns a pass/fail result; status can also be queried by id, by phone number, or by a custom reference. This entry is the product-specific treatment of the Verification API; the parent company Sinch is a global CPaaS provider (SMS, Voice, Email, Verification, Conversation) cataloged separately under the "sinch" provider entry.

Sinch Verification API publishes 3 APIs on the APIs.io network: Report Verification API, Start Verification API, and Verification Status API. Tagged areas include Number Verification, Phone Verification, OTP, 2FA, and CPaaS.

Sinch Verification API’s developer surface includes authentication, documentation, signup flow, pricing, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
47.6/100 developing ▬ flat Agent 48/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessFreemiumSelf serveFree trial⚡ Free to try
3 APIs
Number VerificationPhone VerificationOTP2FACPaaSSMS VerificationFlash CallTwo-Factor AuthenticationIdentity VerificationSinch

Kin Score

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scored 2026-07-27 · rubric v0.5
Composite quality — 47.6/100 · developing
Contract Quality 15.2 / 25
Developer Ergonomics 5.7 / 20
Commercial Clarity 12.6 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
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
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/sinch-verify: 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 3

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

Sinch Verification API Report Verification API

Report the received code or caller ID to complete a verification.

Sinch Verification API Start Verification API

Initiate a phone number verification.

Sinch Verification API Verification Status API

Query the status of pending and completed verifications.

Open Collections 1

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

Sinch Verification API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Sinch Verify Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sinch Verify Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Sinch Verify Finops

FINOPS

Security Posture 2

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

Sinch Verify Authentication

apiKey/http · 2 schemes

SECURITY

Sinch Verify Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Sinch Verify Agentic Access

6 operations · 3 acting

6 operations · 3 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 SignUp
SignUp

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps
 Pricing
Pricing

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: sinch-verify
url: https://raw.githubusercontent.com/api-evangelist/sinch-verify/refs/heads/main/apis.yml
name: Sinch Verification API
kind: company
description: 'The Sinch Verification API (Sinch Verify) is a dedicated phone number verification product for confirming that
  a user controls a given mobile number - the core of OTP, two-factor authentication (2FA), and anti-fraud sign-up flows.
  It supports four verification methods: SMS (one-time passcode), flash call (a missed call whose caller ID is the code),
  phone call / callout (a spoken or key-press code), and data (seamless / silent verification over the mobile data connection).
  A verification is started from your backend, the code or caller ID is reported back, and Sinch returns a pass/fail result;
  status can also be queried by id, by phone number, or by a custom reference. This entry is the product-specific treatment
  of the Verification API; the parent company Sinch is a global CPaaS provider (SMS, Voice, Email, Verification, Conversation)
  cataloged separately under the "sinch" provider entry.'
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Freemium (free trial) · 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/sinch-verify.png
tags:
- Number Verification
- Phone Verification
- OTP
- 2FA
- CPaaS
- SMS Verification
- Flash Call
- Two-Factor Authentication
- Identity Verification
- Sinch
created: '2026-07-11'
modified: '2026-07-11'
specificationVersion: '0.19'
apis:
- aid: sinch-verify:sinch-verify-report-verification-api
  name: Sinch Verification API Report Verification API
  description: Report the received code or caller ID to complete a verification.
  humanURL: https://developers.sinch.com/docs/verification/api-reference/verification/verifications-start
  baseURL: https://verification.api.sinch.com/verification/v1
  tags:
  - Report Verification
  properties:
  - type: OpenAPI
    url: openapi/sinch-verify-report-verification-api-openapi.yml
  - type: Documentation
    url: https://developers.sinch.com/docs/verification/introduction
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification/verifications-start
  - type: PostmanCollection
    url: collections/sinch-verify.postman_collection.json
  - type: OpenCollection
    url: collections/sinch-verify.opencollection.json
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification/verification-status
- aid: sinch-verify:sinch-verify-start-verification-api
  name: Sinch Verification API Start Verification API
  description: Initiate a phone number verification.
  humanURL: https://developers.sinch.com/docs/verification/api-reference/verification/verifications-start
  baseURL: https://verification.api.sinch.com/verification/v1
  tags:
  - Start Verification
  properties:
  - type: OpenAPI
    url: openapi/sinch-verify-start-verification-api-openapi.yml
  - type: Documentation
    url: https://developers.sinch.com/docs/verification/introduction
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification/verifications-start
  - type: PostmanCollection
    url: collections/sinch-verify.postman_collection.json
  - type: OpenCollection
    url: collections/sinch-verify.opencollection.json
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification/verification-status
- aid: sinch-verify:sinch-verify-verification-status-api
  name: Sinch Verification API Verification Status API
  description: Query the status of pending and completed verifications.
  humanURL: https://developers.sinch.com/docs/verification/api-reference/verification/verifications-start
  baseURL: https://verification.api.sinch.com/verification/v1
  tags:
  - Verification Status
  properties:
  - type: OpenAPI
    url: openapi/sinch-verify-verification-status-api-openapi.yml
  - type: Documentation
    url: https://developers.sinch.com/docs/verification/introduction
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification/verifications-start
  - type: PostmanCollection
    url: collections/sinch-verify.postman_collection.json
  - type: OpenCollection
    url: collections/sinch-verify.opencollection.json
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification
  - type: APIReference
    url: https://developers.sinch.com/docs/verification/api-reference/verification/verification-status
common:
- type: AgenticAccess
  url: agentic-access/sinch-verify-agentic-access.yml
- type: Authentication
  url: authentication/sinch-verify-authentication.yml
- type: DomainSecurity
  url: security/sinch-verify-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/sinch
- type: Website
  url: https://sinch.com/verification-api/
- type: Documentation
  url: https://developers.sinch.com/docs/verification/introduction
- type: DeveloperPortal
  url: https://developers.sinch.com/
- type: SignUp
  url: https://dashboard.sinch.com/signup
- type: Plans
  url: plans/sinch-verify-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sinch-verify-rate-limits.yml
- type: FinOps
  url: finops/sinch-verify-finops.yml
- type: Pricing
  url: https://sinch.com/pricing/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com