# Sling

## Docs

- [GET /balance](https://docs.hellosling.com/v1/api-reference/balance.md): GET /api/v1/balance - Retrieve the current credit balance for your Sling account.
- [POST /add-contact](https://docs.hellosling.com/v1/api-reference/contacts/add-contact.md): POST /api/v1/add-contact - Add a single contact.
- [POST /add-contacts](https://docs.hellosling.com/v1/api-reference/contacts/add-contacts.md): POST /api/v1/add-contacts - Add multiple contacts in a single request.
- [POST /create-group](https://docs.hellosling.com/v1/api-reference/contacts/create-group.md): POST /api/v1/create-group - Create a contact group.
- [GET /group-contacts/{groupid}](https://docs.hellosling.com/v1/api-reference/contacts/group-contacts.md): GET /api/v1/group-contacts/{groupid} - List contacts assigned to a specific group.
- [GET /group/{id}](https://docs.hellosling.com/v1/api-reference/contacts/group-details.md): GET /api/v1/group/{id} - Fetch details for a single contact group.
- [GET /groups](https://docs.hellosling.com/v1/api-reference/contacts/groups.md): GET /api/v1/groups - Retrieve contact groups in your account.
- [POST /update-contact/{contactid}](https://docs.hellosling.com/v1/api-reference/contacts/update-contact.md): POST /api/v1/update-contact/{contactid} - Update contact's name, phone, or group assignment.
- [POST /upsert-contact](https://docs.hellosling.com/v1/api-reference/contacts/upsert-contact.md): POST /api/v1/upsert-contact - Create or update a contact by identifier.
- [GET /status/{message_id}](https://docs.hellosling.com/v1/api-reference/message-status.md): GET /api/v1/status/{message_id} - Retrieve the delivery status of a sent message.
- [Sling API v1 reference](https://docs.hellosling.com/v1/api-reference/overview.md): Compact reference for Sling API v1 endpoints, authentication, request formats, and response conventions.
- [GET /rcs/check-capability/{phone}](https://docs.hellosling.com/v1/api-reference/rcs-capability.md): GET /api/v1/rcs/check-capability/{phone} - Check whether a phone number supports RCS.
- [RCS suggestion object](https://docs.hellosling.com/v1/api-reference/rcs-suggestions.md): Reference for Sling RCS suggestion chip object types and fields.
- [POST /send-rcs](https://docs.hellosling.com/v1/api-reference/send-rcs.md): POST /api/v1/send-rcs - Send an RCS text, standalone card, or carousel message.
- [POST /send-sms](https://docs.hellosling.com/v1/api-reference/send-sms.md): POST /api/v1/send-sms - Send an SMS to a phone number, contact ID, or group ID.
- [POST /send-truecaller](https://docs.hellosling.com/v1/api-reference/send-truecaller.md): POST /api/v1/send-truecaller - Send a branded Truecaller message.
- [Authenticate with the Sling API using bearer tokens](https://docs.hellosling.com/v1/authentication.md): Get your Sling API token from the dashboard and pass it as a Bearer credential in every request. Includes cURL, fetch, and axios examples.
- [Sling FAQ: common questions about messaging and API](https://docs.hellosling.com/v1/faq.md): Answers to common questions about Sling: SenderIDs, credit balance, phone number formats, RCS fallback, delivery status, and API troubleshooting.
- [Receive delivery callbacks from Sling webhooks](https://docs.hellosling.com/v1/guides/callbacks.md): Configure a callback URL to receive POST notifications when Sling delivers your SMS or Truecaller messages. Includes payload reference and best practices.
- [Manage contacts and groups with the Sling API](https://docs.hellosling.com/v1/guides/contacts.md): Create contact groups, import single or bulk contacts, and update contact details using the Sling Contacts API. Use contact and group IDs in your send requests.
- [Send RCS messages with Sling: cards and carousels](https://docs.hellosling.com/v1/guides/send-rcs.md): Send rich RCS messages including text, cards, carousels, and interactive suggestions to RCS-enabled recipients via the Sling API.
- [Send SMS messages with Sling to any recipient](https://docs.hellosling.com/v1/guides/send-sms.md): Learn how to send transactional and promotional SMS to individual recipients, contact lists, and groups using the Sling API. Covers all parameters and errors.
- [Send Truecaller messages with Sling API](https://docs.hellosling.com/v1/guides/send-truecaller.md): Deliver branded messages to Truecaller users in Nigeria using the Sling API. Learn all parameters, instant vs. async delivery modes, and callback setup.
- [What is Sling? SMS, RCS & Truecaller API overview](https://docs.hellosling.com/v1/introduction.md): Sling is a REST API platform for sending SMS, RCS, and Truecaller messages in Nigeria. Learn the base URL, required headers, and what Sling offers.
- [Get started with Sling: send your first message](https://docs.hellosling.com/v1/quickstart.md): Send your first SMS with Sling in under 5 minutes. Get your API token, register a sender ID, make your first request, and verify delivery.