Claude Skills by sinch

Sends MMS multimedia messages (images, video, audio, PDFs, vCards) via the MMS channel of the Sinch Conversation API. Available in the United States, Canada, and Australia only. Covers supported media types, file size limits, MMS channel properties, and transcoding behavior. Use when sending an MMS or picture message, sending media to US/CA/AU numbers over MMS, or debugging MMS media rejection and size issues.

Sends RCS (Rich Communication Services) messages via the RCS channel of the Sinch Conversation API — rich cards, carousels, suggested replies and actions, media, location, and calendar actions, with automatic SMS fallback. Use when sending an RCS message, rich card, carousel, or suggested-action message; checking device RCS capability; configuring RCS-to-SMS fallback; provisioning an RCS agent; or sending typing indicators.

Sends and receives SMS text messages via the SMS channel of the Sinch Conversation API. Covers sender ID types (long code, short code, alphanumeric, toll-free, 10DLC), GSM 7-bit vs UCS-2 character encoding, concatenated multi-part messages, opt-out (STOP) handling, and SMS channel properties. Use when sending an SMS or text message, handling inbound SMS or STOP keywords, choosing or configuring an SMS sender ID, or debugging encoding and message-part issues.

Sends WhatsApp Business messages via the WhatsApp channel of the Sinch Conversation API — text, media, interactive, and Meta-approved template messages. Covers the 24-hour customer service window, template approval, opt-in requirements, and media specifications. Use when sending a WhatsApp message or WhatsApp template, re-engaging users outside the 24-hour window, handling WhatsApp opt-ins, or debugging failed WhatsApp sends.

Registers US 10DLC brands and campaigns with Sinch for A2P SMS messaging. Use when the user needs to register a brand, create a 10DLC campaign, check registration status, troubleshoot a 10DLC rejection, fix an EIN mismatch, upgrade from simplified to full registration, or qualify a campaign for US SMS sending on 10-digit long codes. Do NOT use for non-US messaging or toll-free/short code registration.

Configures Sinch API credentials and authentication. Use when setting up OAuth2, Basic auth, application signing, or API keys for any Sinch product including Conversation API, Voice, Verification, Numbers, Fax, and Mailgun. Also use when troubleshooting 401 Unauthorized, 403 Forbidden, invalid signature, or credential errors against any Sinch API. For SDKs usage, see sinch-sdks.

Sends and receives omnichannel messages with Sinch Conversation API. One unified API for SMS, WhatsApp, RCS, MMS, Viber, Messenger, and more. Use when sending texts, WhatsApp messages, rich cards, carousels, templates, batch messages, or building multi-channel messaging.

Provisions SIP trunks, endpoints, ACLs, credential lists, and phone numbers via the Sinch Elastic SIP Trunking REST API. Use when the user needs SIP connectivity, trunk provisioning, inbound/outbound PSTN voice routing, PBX integration, or SIP-to-PSTN bridging.

Send and receive faxes programmatically with Sinch Fax API. Use when building fax workflows, fax-to-email delivery, sending PDFs by fax, checking fax status, managing fax services, configuring cover pages, receiving fax webhooks, or integrating fax into healthcare, legal, or financial applications.

Import, host, qualify, and text-enable phone numbers for Sinch SMS using the Imported Numbers and Hosting Orders API. Use when importing non-Sinch numbers as DCA, creating hosting orders, qualifying numbers for text-enablement, managing LOA workflows, or checking hosting order status.

Integrate Sinch In-App Voice and Video SDK for real-time calling in Android, iOS, or JavaScript apps. Use when the user mentions In-App Calling, VoIP integration, WebRTC with Sinch, app-to-phone calling, video calling, or building voice/video features in a mobile or web app.

Checks email quality before sending via Mailgun Inspect API. Use when previewing emails across clients, checking accessibility (WCAG), validating links, validating images, or analyzing email HTML/CSS compatibility.

Monitors email deliverability via Mailgun Optimize (InboxReady) API. Use when the user wants to test inbox placement with seed lists, monitor IP or domain blocklists, track spam traps, check email health scores, review DMARC reports, or pull Google Postmaster or Microsoft SNDS data. Also use when emails are going to spam, sender reputation is dropping, inbox rate is declining, a domain needs warmup monitoring, an IP needs blocklist removal, or the user wants to set up email deliverability mon...

Build with Mailgun Validate API for email verification and list hygiene. Use when validating email addresses, checking email deliverability, running bulk validation jobs, previewing list health, or cleaning an email list.

Sends, receives, and tracks email via the Mailgun (Sinch) API. Use when the user wants to send email, manage domains, configure webhooks, query email events/logs, manage templates, handle suppressions (bounces, unsubscribes, complaints), set up inbound routes, manage mailing lists, DKIM keys, or IP warmup using Mailgun.

Looks up phone number details via Sinch Number Lookup API. Use when checking carrier, line type, porting status, SIM swap, VoIP detection, or reassigned number detection (RND) for fraud prevention or routing decisions.

Guides the multi-step Number Order workflow for purchasing phone numbers with KYC compliance via the Sinch Numbers API. Use when buying, ordering, provisioning, or activating Sinch numbers in countries that require KYC registration, regulatory compliance, or identity verification. Triggers on "number order", "KYC", "number registration", "phone number purchase", or "number provisioning".

Search, rent, manage, and release phone numbers with the Sinch Numbers API. Use when listing active numbers, searching available numbers, renting or releasing numbers, updating number configuration (SMS/voice/callback), managing emergency addresses, or checking available regions.

Port phone numbers from other carriers into Sinch with the Porting API. Automates port-in order creation, portability checks, order tracking, on-demand activation, and webhook notifications. Use when porting numbers, checking portability, creating port-in orders, tracking port status, activating ported numbers, uploading LOA documents, or configuring porting defaults.

Provisions and manages channel resources for Conversation API projects, including WhatsApp accounts/senders/templates, RCS senders, KakaoTalk senders/templates, webhooks, and bundles. Use when the user asks to onboard channels, configure provisioning webhooks, manage templates, orchestrate multi-service bundles, or automate channel setup.

Sinch SDK installation and client initialization for Node.js, Python, Java, and .NET. Use when installing a Sinch SDK, initializing SinchClient, setting up SDK credentials, configuring conversation region in SDK, or building a multi-product SDK client. For In-App Calling SDKs, see sinch-in-app-calling.

Verify phone numbers via SMS, Flashcall, Phone Call, Data (seamless carrier-level), or WhatsApp with Sinch Verification API. Use when implementing user phone verification, OTP, two-factor authentication, or number ownership confirmation flows.

Build voice apps with Sinch Voice REST API. Use for phone calls, text-to-speech (TTS), IVR menus, DTMF input, conference calling, call recording, call forwarding, answering machine detection (AMD), SIP routing, WebSocket audio streaming, and SVAML call control.

Check available messaging channels, channel capabilities, and channel configuration for Sinch Conversation API. Use when the user asks which channels are available, what channels can be used, how to reach someone, what messaging options exist, or channel capabilities for a contact or app.

Retrieve and display message history from Sinch Conversation API. Use when the user asks to show messages, view conversation history, list recent messages, see messages with a contact, check message history, or view last N messages. Supports filtering by contact, conversation, channel, and time range.

Manage contacts in Sinch Conversation API. Use when the user wants to create a contact, update contact information, list contacts, find a contact, get contact details, add channels to a contact, or manage contact channels. Handles contact creation, updates, and channel associations.

Manage webhooks in Sinch Conversation API. Use when the user wants to create a webhook, update webhook settings, list webhooks, delete a webhook, get webhook details, configure webhook triggers, or manage webhook callbacks. Handles webhook lifecycle management including creation, updates, deletion, and trigger configuration.

Send messages via Sinch Conversation API over WhatsApp, SMS, RCS, Messenger, Viber, Instagram, Telegram, and other channels. Use when the user wants to send a message, text someone, send a WhatsApp message, send an SMS, or communicate via any messaging channel. Automatically handles contact creation and conversation management.