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Record and replay your first execution.

Three steps from install to a verified replay. The full reference ships during early access.

01 · install
$ pip install ontral
02 · record
import ontral
ontral.record(app="support-agent")
03 · replay + verify
$ ontral replay <capsule-id> --attest

Browse the documentation

26 topics · documentation preview — local filter, full search ships with the hosted docs

Getting started

first capsule in minutes

  • Installguide
  • Record an executionguide
  • Inspect a capsuleguide
  • Replay a capsuleguide
  • Verify replayguide

Core concepts

the model behind the product

  • Execution capsulesconcept
  • Observationsconcept
  • Determinismconcept
  • Effectsconcept
  • Replay eligibilityconcept
  • Divergenceconcept

SDK

python

  • Python APIreference
  • Configurationreference
  • Custom tool boundariesguide
  • Metadata and outcomesguide

Integrations

execution boundaries

  • OpenAIboundary
  • Anthropicboundary
  • HTTPXboundary
  • Requestsboundary
  • MCPboundary

CLI

ontral <command>

  • recordcli
  • replaycli
  • inspectcli
  • diffcli
  • branchcli
  • attestcli

The full reference ships during early access.

Hosted docs, the complete Python API, and the CLI reference reach early-access teams first.

Request early access