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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.

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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.

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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.

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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).

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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.

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2025-12

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

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2025-11

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

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2025-10

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

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2025-Q3

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

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Older

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

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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.

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SDK changelogs

Each package has its own detailed release notes:

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RSS

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