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The Sayless public API is a curated HTTP API for the work graph: conversations, messages, tickets, companies, contacts, documents, teams, attachments, and outbound webhooks. Integrations authenticate with a personal API key (sl_api_…) or an OAuth access token (sl_oat_…), including app-actor tokens from client credentials. The official web app uses a cookie session and is not an integration path.

Base URL

How this reference is organized

Start with the pages in this group, then open a resource. Resource groups below that (Tickets, Conversations, Companies, and so on) are generated from the OpenAPI document. Each operation page shows the request body, response, and a playground.

What stays in the product

Billing, channel connect wizards, broadcasts, triggers, analytics, the customer portal admin, and the client sync protocol are session-only. They are not part of this API.