> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sendlyy.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Sendlyy developer documentation

> WhatsApp messaging infrastructure for your application.

Sendlyy provides organization-scoped REST APIs for dedicated WhatsApp messaging, shared verification codes, shared transactional notifications, contacts, usage and signed delivery events.

Use an independent service key from your server. Sendlyy handles durable acceptance, tenant routing, provider delivery work and prepaid wallet accounting. AI agents are a separate dashboard offering; there is no developer AI or embedding API.

> [card] [Send your first request](https://docs.sendlyy.app/guides/quickstart.md)
>
> Start with a free Sandbox verification.

> [card] [API reference](https://docs.sendlyy.app/api-reference/post-messages.md)
>
> Explore the scoped REST endpoints.

> [card] [Verify](https://docs.sendlyy.app/guides/verify.md)
>
> Send and check expiring, single-use codes.

> [card] [Webhooks](https://docs.sendlyy.app/guides/webhooks.md)
>
> Verify signatures and deduplicate deliveries.

> [!WARNING]
>
> Implementation is distinct from service availability. Shared live products need Meta approval, reviewed templates, approved prices and explicit enablement. See [availability](https://docs.sendlyy.app/guides/availability.md) before making launch commitments.

The base URL is `https://api.sendlyy.app/api/v1`. Routes are lowercase and multiword segments use kebab-case. Requests and responses use camelCase JSON. Use only the version actually deployed in your testing environment.


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