Changelog

v0.1.0 — February 2026

Initial public release of the ARCP protocol and reference implementation.

• npm: @arcp-protocol/connect published — React component library for publisher /connect pages (ArcpConnectPage, KeyGenerator, McpConfigBlock, CopyButton)
• Router API: query, render/opened, receipts/export
• Registry API: publishers, revocations, JWKS
• Publisher reference implementation (allreviews, sportsball, eighty)
• MCP gateway with 4 tools (arcp_discover, arcp_query, arcp_render_opened, arcp_receipts_export)
• Managed Auth: user linking, subscription management, entitlements
• ES256 JWT render tokens and signed receipts
• SHA-256 API key hashing with credential lifecycle (expiry, revocation)
• Scoped admin API keys with managed:read / managed:write / admin:full scopes
• Rate limiting with per-client per-bucket windows
• Security headers on all responses (nosniff, DENY, HSTS)
• CORS support for browser clients
• Idempotency framework for write operations
• Persistent audit trail (arcp_audit_events)