Changelog Crimson API v1

What's new.

Every meaningful change to the Crimson platform — new endpoints, performance work, integrations, and deprecations. Released versions never break; everything below is additive unless explicitly noted.

April 14, 2026
v1.9.0

Compensation percentile expansion

NewImproved

Compensation benchmarks now expose the full distribution rather than just the median. You can request any of the p10 through p95 percentiles and receive separate base, bonus, and equity breakdowns for each.

  • Added percentiles query parameter (p10, p25, p50, p75, p90, p95).
  • New equity_value and bonus_pct objects on every benchmark.
  • Coverage expanded to 42 metro markets and 310 role/level combinations.
March 3, 2026
v1.8.0

Faster analytics warehouse

Improved

We migrated Talent Analytics to a columnar query engine. Supply-index and funnel queries that previously took seconds now return in well under 500ms at p95, with no change to the API contract.

  • Analytics query latency reduced roughly 3× at p95.
  • /v1/analytics/supply now supports multi-market aggregation in a single call.
  • Zero-downtime migration — see the status history.
February 5, 2026
v1.7.0

Webhooks 2.0 — signed & retried

New

A ground-up rebuild of webhook delivery. Every payload is now signed with HMAC-SHA256, delivery is retried with exponential backoff for up to 24 hours, and a searchable delivery log is available in the dashboard.

  • New Crimson-Signature header for verification.
  • Automatic retries with exponential backoff and per-endpoint ordering.
  • Six event types including offer.accepted and compensation.updated — see webhooks.
January 14, 2026
v1.6.2

Go & Java SDKs

New

Official, fully-typed clients for Go and Java join our JavaScript, Python, and Ruby libraries. Both ship with built-in retries, pagination auto-iteration, and context/cancellation support.

  • go get crimsontalent.com/go
  • Java client published to Maven Central as com.crimsontalent:sdk.
  • All five SDKs now track a shared release cadence — see SDKs.
December 10, 2025
v1.6.0

Greenhouse & Lever integrations

New

Two-way sync with two of the most-requested ATS platforms. Connect via OAuth in the dashboard and candidate stages flow between Crimson pipelines and your ATS automatically.

  • Native Greenhouse and Lever connectors — no middleware required.
  • Field mapping UI for custom stages and dispositions.
  • Full catalog on the integrations page.
November 6, 2025
v1.5.4

Security & rate-limit improvements

ImprovedFixed

Hardening across authentication and abuse protection, plus more generous and more transparent rate limits for all plans.

  • Standard limit raised to 1,000 req/min with a 2,000 burst ceiling.
  • Added X-RateLimit-Remaining and X-RateLimit-Reset to every response.
  • Fixed an edge case where revoked keys could remain cached for up to 60 seconds.
October 2, 2025
v1.5.2

Dashboard redesign

Improved

A rebuilt employer dashboard with a dedicated Developers section for key management, usage graphs, and webhook logs — all backed by the same public API.

  • Per-key usage charts and scope management.
  • Inline webhook delivery inspector with replay.
  • Dark mode and full keyboard navigation.
September 4, 2025
v1.5.0

Forecast model v2

NewImproved

The second-generation forecast model powering /v1/analytics/forecast. It projects time-to-fill and candidate availability up to two quarters out with materially tighter confidence intervals.

  • Median forecast error reduced ~28% versus v1 on backtests.
  • Added confidence_interval to every forecast response.
  • Now accounts for seasonal hiring cycles and market-level supply shocks.

Deprecation policy

We take backwards compatibility seriously. Released, dated API versions never receive breaking changes. When we must deprecate a field or endpoint, we announce it here, mark it in the reference, and give a minimum of 12 months' notice before removal. Pin the Crimson-Version header to insulate your integration from change.

Build on the latest.

Pin a version, follow the changelog, and ship with confidence. The full reference has everything you need.

Read the API docs