# Sinch Verification API

**Canonical:** https://apis.io/providers/sinch-verify/  
**Website:** https://sinch.com/verification-api/  
**APIs profiled:** 3

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.

## Kin Score — 40.1 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 40.1).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 57.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 31.0 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

Regulatory layer — **Telecommunications**: 16.7 (matched via tags).

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium (free trial) · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (3)

- **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.

## Agentic access (1)

- **Sinch Verify Agentic Access** — 6 operations · 3 acting

## Security (2)

- **Sinch Verify Authentication** — apiKey/http · 2 schemes
- **Sinch Verify Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Sinch Verify Plans Pricing**

## Tags

Number Verification, Phone Verification, OTP, 2FA, CPaaS, SMS Verification, Flash Call, Two-Factor Authentication, Identity Verification, Sinch

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sinch-verify/). Scores are computed from the provider's own public artifacts under a published rubric.