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

# Changelog

> API, SDK, and platform changes over time.

Notable changes to the Sly API surface and SDKs. This page is for human readers; machine-readable change feeds are available at `/v1/openapi.json` (spec) and via GitHub release notes for each package.

## 2026-04

* **Docs portal live.** This site replaces the former GitHub-hosted markdown. Migration tracked [here](#).
* **Public sandbox demo key.** Every endpoint in the API reference has a live "Try it" button pre-filled with a shared demo key against `sandbox.getsly.ai`.
* **MCP catalog page** published, listing every Sly + Scanner MCP tool with input/output schemas.

## 2026-03

* **`@hono/zod-openapi` migration** underway. The OpenAPI spec at `/v1/openapi.json` is now auto-generated for public protocols (UCP, ACP, AP2, x402, A2A, MCP). CRUD endpoints migrate through Q2.
* **Ed25519 session tokens** generally available. Previously labeled "beta" — now the production-recommended agent auth method.
* **A2A marketplace** gets ratings, attestations (EAS), and reputation-weighted discovery.
* **ERC-8004 on-chain identity** available for agents — mints a portable identity NFT.

## 2026-02

* **Portal tokens** (`portal_*`) launched. Scoped, short-lived credentials for customer-facing dashboards.
* **Scanner service** enters private beta with 13 MCP tools (later expanded to 19).

## 2026-01

* **KYA tiers** formalized. Previously ad-hoc limits per agent are now one of four tiers (0–3) with documented upgrade paths.
* **Approval workflows** GA. Threshold-based human-in-the-loop for agent spending.
* **Wallet policies** refined — per-merchant rules, velocity limits, time windows.

## 2025-12

* **`@sly_ai/mcp-server` v0.1** — Claude Desktop integration.
* **A2A task flow** finalized — JSON-RPC, task lifecycle, rating.

## 2025-11

* **x402 support** added. Register endpoints, accept micropayments, bridge to fiat.
* **AP2 mandates** GA. Create, execute, revoke.

## 2025-10

* **Stream alerts** — SSE + webhook events when runway drops.
* **Batch transfers** for payroll / disbursements.

## 2025-Q3

* **ACP protocol** integrated (Stripe + OpenAI ecosystem).
* **UCP** launched as Sly's native checkout protocol.
* **Money streaming** released with wrap/unwrap/withdraw primitives.

## Older

Prior releases (pre-2025 Q3) are in internal changelogs only. The platform was in closed alpha.

## Breaking change policy

* **Pre-1.0** (current): breaking changes allowed on minor version bumps. Announced at least 30 days in advance via this page and email.
* **Post-1.0** (target: late 2026): breaking changes only on major version bumps. Old versions supported for 12 months minimum.

## SDK changelogs

Each package has its own detailed release notes:

* [`@sly_ai/sdk` releases](https://github.com/Sly-devs/sly/releases?q=sdk)
* [`@sly_ai/cli` releases](https://github.com/Sly-devs/sly/releases?q=cli)
* [`@sly_ai/mcp-server` releases](https://github.com/Sly-devs/sly/releases?q=mcp-server)

## RSS

A machine-readable RSS feed is [coming soon](/resources/coming-soon) — for now, watch the [docs repo](https://github.com/Sly-devs/sly/commits/main/docs-site/public/resources/changelog.mdx) or subscribe to tenant-admin email notifications for release announcements.