# Sinch

**Canonical:** https://apis.io/providers/sinch/  
**Website:** https://www.sinch.com/  
**APIs profiled:** 35

Sinch is a cloud communications platform providing APIs for SMS, voice, video, fax, verification, and omnichannel messaging. It enables businesses to integrate global communication capabilities into their applications through programmable APIs for sending messages, making calls, verifying phone numbers, and managing sender identities across carrier networks worldwide.

## Kin Score — 57.0 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 57.0).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 76.5 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 28.9 |
| Developer Ergonomics | 50.0 |
| Commercial Clarity | 55.3 |
| Access Clarity | 55.3 |

Regulatory layer — **Telecommunications**: 59.7 (matched via tags).

## Agent readiness — 36.7 (agent-ready)

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

## Access

Enterprise · Self-serve signup — onboarding: self-serve, pricing: enterprise, trial: no (confidence: high).

## APIs (35)

- **Sinch Access Control Lists API** — Manage IP address access control lists for securing SIP trunk access.
- **Sinch Active Numbers API** — Manage phone numbers that have been purchased and are active in your project, including updating configurations and releasing numbers.
- **Sinch Applications API** — Manage Voice API applications including retrieving application configuration, updating settings, and managing assigned numbers.
- **Sinch Apps API** — Manage Conversation API applications including channel credentials and webhook configurations.
- **Sinch Available Numbers API** — Search for available phone numbers by country, type, and capabilities.
- **Sinch Available Regions API** — List available regions and number types that can be provisioned.
- **Sinch Batches API** — Batches are sets of SMS messages. You can send a single message or many messages at once. Batches are queued and sent at the rate limit in first-in-first-out order.
- **Sinch Brand Metadata API** — Retrieve metadata about brand configuration options and requirements.
- **Sinch Brands API** — Create, update, list, and delete customer brand profiles used for messaging campaigns and sender registrations.
- **Sinch Callouts API** — Callouts are calls made to a phone number or app using the API. Supported types include conference callouts, text-to-speech callouts, and custom callouts.
- **Sinch Calls API** — Manage ongoing calls or retrieve information about a call. Supports updating call properties and hanging up calls.
- **Sinch Capability API** — Query channel capabilities for specific contacts to determine which channels can be used to reach them.
- **Sinch Conferences API** — Manage ongoing conferences including retrieving conference info, muting or unmuting participants, and removing participants.
- **Sinch Contacts API** — Manage contacts and their channel identities. Contacts group together underlying connected channel recipient identities.
- **Sinch Conversations API** — Manage conversations which are collections of messages tied to a specific app and contact.
- **Sinch Delivery Reports API** — Delivery reports provide the status of sent messages. Reports can be retrieved via the API or delivered via webhook callbacks.
- **Sinch Events API** — Send and receive events such as composing indicators across supported channels.
- **Sinch Fax to Email API** — Configure fax-to-email forwarding for incoming faxes on a service.
- **Sinch Faxes API** — Send and manage faxes including sending to single or multiple recipients, listing sent and received faxes, and downloading fax content.
- **Sinch Groups API** — Groups are sets of phone numbers (MSISDNs) that can be used as targets when sending SMS. A phone number can only occur once in a group.
- **Sinch Inbounds API** — Inbound messages (Mobile Originated) are incoming messages sent to your short codes or long numbers from mobile phones.
- **Sinch KakaoTalk Senders API** — Manage KakaoTalk sender identities for messaging through the Conversation API.
- **Sinch LINE Senders API** — Manage LINE sender identities for messaging through the Conversation API.
- **Sinch Market Requirements API** — Retrieve market-specific requirements for sender ID registration in different countries.
- **Sinch Messages API** — Send and retrieve messages across all supported channels using a normalized message format.
- **Sinch Phone Numbers API** — Assign and remove phone numbers from SIP trunks for inbound and outbound calling.
- **Sinch Projects API** — The Projects API from Sinch — 3 operation(s) for projects.
- **Sinch RCS Senders API** — Manage RCS sender identities for Rich Communication Services messaging through the Conversation API.
- **Sinch Registrations API** — Create, update, delete, and track sender ID registrations for compliance with local messaging regulations.
- **Sinch SIP Endpoints API** — Manage SIP endpoints that represent your SIP infrastructure such as PBX systems and contact centers.
- **Sinch SIP Trunks API** — Create, view, update, and remove SIP trunks that connect your telephony infrastructure to the Sinch network.
- **Sinch Telegram Senders API** — Manage Telegram bot sender identities for messaging through the Conversation API.
- **Sinch Transcoding API** — Transcode generic message formats to channel-specific formats for preview purposes.
- **Sinch Verifications API** — Start, report, and query the status of phone number verifications using SMS, flashcall, phone call, or data verification methods.
- **Sinch Webhooks API** — Manage webhook endpoints for receiving callbacks on message delivery, inbound messages, and other events.

## Agentic access (1)

- **Sinch Agentic Access** — 133 operations · 74 acting · 4 human-in-the-loop

## Security (3)

- **Sinch Authentication** — http/oauth2 · 3 schemes
- **Sinch Domain Security** — TLSv1.3 · HSTS · DMARC
- **Sinch Trust Center** — SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR

## Plans (1)

- **Sinch Plans Pricing**

## Tags

Communications, Messaging, SMS, Voice, Verification, CPaaS

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