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sinch-api-messages-send-card

Send RCS rich card messages with title, image, and buttons via Sinch Conversation API.

6|2|Updated Dec 11, 2025
Search Tags:#messaging#sms#send message#rcs#sinch#conversation api#rich card
One-click install
npx skills add https://github.com/sinch/sinch-plugins --skill sinch-api-messages-send-card-sinch
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: sinch-api-messages-send-card
Source: https://github.com/sinch/sinch-plugins/tree/main/plugins/sinch-antigravity-plugin/skills/sinch-api-messages-send-card
Command: npx skills add https://github.com/sinch/sinch-plugins --skill sinch-api-messages-send-card-sinch

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Sending rich card messages (title, description, image, clickable buttons) over RCS requires constructing a correctly formatted card_message payload and authenticating against the Sinch Conversation API, which is tedious to do by hand. ## Core Features & Use Cases - Rich Card Delivery: Send a card with title, description, image URL, and optional choice buttons to any E.164 phone number. - MCP or Direct API Fallback: Uses the Sinch MCP tool when available, otherwise calls the Conversation API messages:send endpoint directly with OAuth2. - Use Case: A marketing team wants to send an RCS promotion with a product image and "Shop Now" and "Details" buttons to a customer; they provide the number, title, and choices and the message is sent immediately. ## Quick Start Ask the assistant to send an RCS card message to +14155551234 with title "Sale", description "50% off", and buttons "Shop Now" and "Details".

Frequently Asked Questions about sinch-api-messages-send-card

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I send an RCS rich card message with Sinch?▼

Provide the recipient phone number in E.164 format, a card title, and optionally a description, image URL, and comma-separated button labels. The skill builds a card_message payload and posts it to the Sinch Conversation API messages:send endpoint.

What parameters does the Sinch card message API accept?▼

The card_message accepts a required title, plus optional description, media_message with an image URL, and a choices array where each choice has text and postback_data. The recipient is specified via channel_identities with the RCS channel.

Does Sinch card messaging work on channels other than RCS?▼

RCS is recommended for full card display with images and buttons. Other channels such as SMS may receive a transcoded text fallback version of the card instead of the rich layout.

Why does the Sinch card message fail with a configuration error?▼

The API call requires CONVERSATION_PROJECT_ID, CONVERSATION_KEY_ID, CONVERSATION_KEY_SECRET, CONVERSATION_REGION, and CONVERSATION_APP_ID environment variables. If these are missing and no MCP tool is available, the skill reports that the Sinch API is not configured.

Can I add clickable buttons to an RCS message?▼

Yes, pass comma-separated labels via the choices parameter. Each label becomes a choice with text and a postback_data value derived from the label, rendered as a clickable button on RCS.

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