XCIM interoperability

Public evidence for implementers testing the XCIM draft across sending, receiving and infrastructure roles.

PROGRAM: IMPLEMENTERSPROFILE: v0.1 DRAFTPUBLIC INTEROP EVENTS: NOT STARTEDUPDATED: 2026-08-10

Current evidence

Interoperability program state
Capability State Evidence Next gate
Emabled reference issuer Operational sandbox Public issuer surface ↗ Pair with an independent implementation
Hosted consent and receipts Implemented by Emabled Public keys ↗ Pair with an independent implementation
Self-test suite Published draft Unified Python + Node runner with deterministic fixtures Recruit independent sender and receiver
Independent sender No public result yet No implementation report published First ESP cohort
Independent receiver No public result yet No implementation report published First mailbox-provider cohort
Interop-tested pair Not started Two independent implementations required Run a paired test window

What qualifies as evidence

A public result must name the exact draft, implementation version, role, test date, vectors exercised and known limitations. A logo, sandbox account or private demonstration is not an interoperability result.

Test windows

The schemas, positive and negative fixtures, and local runners are now published for draft review. The first cohort and paired test dates will be announced as independent sender and receiver teams join; teams can request sandbox access and review the Implementers Program ↗.

Machine-readable interop status · Implementation matrix · Tools and access ↗