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API contract changes are listed newest first. Breaking entries include the fields and client updates required to migrate.

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July 21, 2026

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JAAA USDT available in production

Production now returns ground-jaaa-usdt-vault from GET /v2/wallets/yield-sources. Put this source under strategy.allocations.usdt; continue using ground-jaaa-usdc-vault under strategy.allocations.usdc for the USDC-funded lane. This availability update does not change the response schema or introduce new identifiers. The JAAA-USDT metadata now correctly describes its AAA-rated collateralized loan obligation exposure.

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July 20, 2026

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Stablecoin-explicit JAAA yield source IDs

Breaking change The existing USDC-funded JAAA source moved from ground-jaaa-vault to ground-jaaa-usdc-vault. Update stored strategy templates and API clients to use the stablecoin-explicit USDC ID. Sandbox also exposes ground-jaaa-usdt-vault for the USDT-funded JAAA lane. Place it under strategy.allocations.usdt only when it is present in the live environment-specific response from GET /v2/wallets/yield-sources. Production clients must not assume the USDT row is available until the production catalog returns it. Historical completed JAAA-USDC transactions retain their economics and remain readable after the identity migration.

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July 17, 2026

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Canonical list responses and webhook event casing

Breaking change
Update clients that read the removed response aliases before calling the affected endpoints after this release.
We completed the response-pattern migration introduced on July 9. The following endpoints now return list items only under data and pagination only through nextCursor:
  • GET /v2/wallets/yield-sources
  • GET /v2/activity
  • GET /v2/webhooks
  • GET /v2/webhooks/events
  • GET /v2/webhooks/{id}/events

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List envelope migration

All affected list responses now use this shape:
When nextCursor is non-null, pass it as the next request’s cursor query parameter. A null value means there are no more pages.

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Webhook event field migration

Webhook event feed items and their nested latestEmission object now use camelCase exclusively. Update clients to read:
  • registrationId, eventType, attemptCount, deliveredAt, lastError, createdAt, and updatedAt on each event;
  • eventId, attemptNumber, requestedAt, completedAt, responseStatus, responseMs, and errorMessage from latestEmission.
The equivalent snake_case fields are no longer returned.

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Required client changes

  1. Read every affected list from response.data.
  2. Replace response.hasMore checks with response.nextCursor !== null.
  3. Replace snake_case webhook event and delivery-attempt field access with the camelCase names above.