OpenUSDC
Changelog

Every meaningful change, in order.

Versions track the wire format (x402/0.5 at present); SDKs and gateway minor versions move in lockstep. Subscribe to the RSS feed at /changelog.rss or follow @openusdchq.

v0.6.2Feature

Solana mainnet GA

  • The Solana route is now generally available. Settlements typically clear in ~700ms with a 2-block confirmation budget.
  • Per-chain price overrides at the gateway route level — quote 0.0040 USDC on Base and 0.0028 USDC on Solana for the same handler.
  • New chain.preferred field on wallet policies; the router still falls back if the preferred chain is unhealthy.
v0.6.1Improvement

Cloud audit log streaming

  • Enterprise workspaces can now stream audit logs to a webhook or Kafka topic in near real-time.
  • SCIM 2.0 endpoint for user and group provisioning, with deep integrations for Okta, Entra, and Jumpcloud.
  • Improved reconciliation export speed for workspaces with >10M settlements.
v0.6.0Breaking

x402 wire bump to 0.5

  • The wire format moves from x402/0.4 to x402/0.5. Old gateways and SDKs interop until 2026-10-01.
  • The signed receipt is now compact JSON instead of a JOSE envelope (smaller, faster to verify, easier to log).
  • maxSpend replaces exact-amount quoting as the recommended default.
  • Action required: bump SDKs to 0.6+ before the 2026-10-01 deadline.
v0.5.4Feature

Webhook event filters

  • Filter webhook deliveries by amount, chain, counterparty, route, or trace prefix.
  • New policy.violated event — fire when an agent attempts a payment outside its wallet policy.
  • Webhook signing keys rotate per workspace on-demand from the dashboard.
v0.5.0Feature

Rust SDK and Cloudflare Workers builds

  • First-class Rust SDK with the same wallet, policy, and fetch surface as Node and Python.
  • A 14 KB Workers build of the Node SDK, runnable as middleware in front of any Worker route.
  • OpenTelemetry exporters across all SDKs now emit interoperable openusdc.payment spans.
v0.4.0Feature

OpenUSDC Cloud GA

  • Hosted dashboard, reconciliation, alerts, and exports leave private beta.
  • Free tier of 10,000 reconciled payments per workspace per month.
  • Spearbit audit of the gateway core published in the audits/ directory of the GitHub repo.
v0.3.0Feature

Base + Optimism general availability

  • Base and Optimism leave preview. Arbitrum stays in preview through 0.4.
  • Deterministic chain simulator for tests becomes the default for openusdc dev --chain sandbox.
  • New CLI commands: openusdc receipts tail, openusdc policy lint.