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This changelog covers API and platform changes from v1.0 onward. Changes are grouped by milestone. Breaking changes are marked with a warning.

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v2.8 — Curated Widget Kit, Agent Kit GA, Exchange Kit removed

Released: 2026-05-15 The platform consolidates around four Kits — Signing, Agent, Payout, Widget — and ships Agent Kit as a first-class product.

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Added

  • Agent Kit (/v1/agents/*) — Budget-enforced AI agents with USDC wallets on Solana and x402 payments. SDK: @relayerfi/agent-sdk.
  • Payout: On-ramp (/v1/payout/onramp/*) and Off-ramp (/v1/payout/offramp/*) — directional fiat ↔ stablecoin flows, formerly bundled in Accounts.
  • Payout: Orders (/v1/orders) — unified order tracking across all rails (list, get, cancel).
  • Signing - Passkeys and Signing - Recovery — explicit endpoints for WebAuthn registration and email-based recovery.
  • AI-ready docs — the documentation site exposes an MCP server at /mcp, an llms.txt index, and contextual deeplinks to ChatGPT / Claude / Cursor / VS Code.

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Changed (breaking)

The Exchange Kit (/v1/exchange/*) has been removed entirely. Operators who used OTC quotes/trades should migrate to direct stablecoin → fiat flows via the Payout Kit.
Widget creation is now curated — the POST /v1/action, PATCH /v1/action/{id}, and POST /v1/action/widgets/swap endpoints are no longer publicly accessible. Use the four canonical builders (/v1/action/builders/{swap,transfer-native,crosschain-transfer,crosschain-bridge}) instead.
  • The legacy POST /v1/transactions/sign/transfer/{native,token} endpoints were removed. Use POST /v1/transactions/prepare + POST /v1/transactions/confirm (passkey-stamped) instead.
  • Workspace-management endpoints (/v1/integrators/*) are now INTERNAL scope — accessible from the dashboard only.

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v2.0 — Routes, Roles, Modules & Permissions

Released: 2026-03-25 Role-based access control, dynamic sidebar, and team management. Introduced workspace-scoped permissions and multi-team support.

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Added

  • RBAC guard — API endpoints are now protected by role-based access control. Requests require an API key with sufficient permissions for the target resource.
  • Dynamic sidebar — The dashboard sidebar is built from the workspace’s active modules and role permissions, not a static list.
  • Team management — Workspace owners can invite team members, assign roles (Admin, Manager, Viewer), and control module access per team.
  • Module permissions — Each Kit module can be enabled or disabled per workspace.
  • Route restructuring — All API routes are now under /v1/{kit}/{resource} with consistent naming across Kits.

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Changed

  • Auth guard applied globally — previously some endpoints were unprotected.
  • Signing wallet endpoints moved from /v1/wallets to /v1/signing/wallets.

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v1.2 — Platform Rename

Released: 2026-03-25 The platform was renamed from Sherry to Relayer. Repository, package, and API references updated.

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Changed

  • sherry-api → relayer-api
  • sherry-dashboard → relayer-dashboard
  • Base production URL changed from https://api.sherry.fi to https://api.relayer.fi
  • npm packages renamed to @relayer/* namespace
If you were using https://api.sherry.fi, update your base URL to https://api.relayer.fi. Old URLs are not redirected.

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v1.1 — Cleanup & Module Mapping

Released: 2026-03-25 Internal module paths cleaned up. No breaking changes to the external API.

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Changed

  • Internal module structure reorganized: common/ → api/, shared/ → blockchain/
  • Action Kit split: GTM (go-to-market) logic separated from core Action Kit
  • Rewards endpoint moved to Action Kit from a standalone module

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v1.0 — Kit Architecture

Released: 2026-03-21 Initial Kit-based architecture. The Relayer API is organized into purpose-built Kits, each covering a distinct domain.

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Added

  • Signing Kit (/v1/signing/*, /v1/transactions/*) — Self-custodial wallets, transaction prepare/confirm, passkey-based signing
  • Payout Kit (/v1/payout/*, /v1/orders) — Fiat on/off-ramp rails, recipient management, settlement tracking
  • Agent Kit (/v1/agents/*) — Budget-enforced AI agents with USDC wallets and x402 payments
  • Widget Kit — Embeddable React components for canonical protocols (swap, transfer, crosschain)
  • Consistent API response envelope: { success, message, data, statusCode, timestamp, path }
  • API key authentication via Authorization: ApiKey <key> header