We're updating the structure of the call.cdr and recording object in Callr Actions to align with the CDR and Recording format from our REST API v2.

❗️
This is a breaking change
The new format will become the default on April 1st, 2026.

What's changing?

The structure of the CDR object inside call and $dial is changing to align with the format used in REST API v2.

This affects any scenario that uses:

call.cdr (in inbound flows)
$dial.cdr (after dial@v1)

The structure of the recording variable is changing to align with the Recording object used in REST API v2.

⚠️ Examples of Impacted Code

You may be affected if you're using fetch@v2 like this:

- action: fetch@v2
  params:
    url: https://...
    body: |
      {
        "call": ${{ JSON.stringify(call) }} # <---- call.cdr has changed
        ...
      }

Or referencing CDR properties directly:

- if: call.cdr.duration_answered # <---- becomes durationAnswered (among others)
  then:
    - ...

Or using dial@v1 from an outbound call:

- action: dial@v1
  params:
    targets: [...]
  result: $dial
              
- action: fetch@v2
  params:
    body: |
      {
        "dial": ${{ JSON.stringify($dial) }} # <---- $dial.cdr changed
        ...
      }

Or using the recording variable:

- action: fetch@v2
  params:
    body: |
      {
        "recording": ${{ JSON.stringify(recording) }} # <---- recording changed
      }

📘
Documentation

Full reference for the new CDR format: Call Detail Records (CDR).

OpenAPI Recording object definition: Recording.

Why this matters

Aligning with our REST API means:

More consistent data structures across products
Easier debugging and integration with external platforms
Simplified long-term maintenance

But this also means any logic depending on the current structure will need to be updated.

What you need to do

🧪 1. Test with the new format (opt-in)

To preview the new structure today, add this to your scenario:

compat:
  version: "2025-09-01"

🛡️ 2. Lock to the current format (temporary)

If you need time to update your logic or integrations, you can lock your scenario to the current format using:

compat:
  version: "2024-04-01"

This ensures your scenario won’t break when the new format becomes the default.

🚀 3. Migrate when ready

Once you’ve updated your code to work with the new format, update all your scenarios to:

compat:
  version: "2025-09-01"

This ensures you’re aligned with the latest standard and won’t be affected by future defaults.

📘
Want to compare formats side-by-side?
Check the full changelog with before/after examples: 👉 2025-09-01 updates.

Changelog

Real-Time Apps Deprecation Notice

JSON-RPC v1 API Deprecation Notice

REST API v2 is Here!

Breaking Change - call.cdr and recording Format Update

Private beta

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