monte-carlo-data/MC Prevent

Run Monte Carlo's MC Prevent to assess risk of data pipeline changes before merge.

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Maintenance Recency: Activelast commit May 5, 2026
License: Apache 2.0

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workflow.ymlSHA-pinned

uses: monte-carlo-data/mc-prevent-action@8ca443a69500f175bfd53b793765e813f551ff5d # v1.2.1

tags can be moved; commit SHAs can't. why a SHA?

Inputs

name	description	required	default
mcd-id	Monte Carlo API Key ID (from MC Settings > API Keys).	yes	—
mcd-token	Monte Carlo API Key Token (from MC Settings > API Keys).	yes	—
api-url	Monte Carlo MC Prevent API URL.	no	https://api.getmontecarlo.com/ci/assess
fail-on-error	Deprecated — use block-on instead. false = block-on: none. true is a no-op (defers to block-on).	no	true
block-on	Which risk tiers cause the job to exit non-zero: low+ (block on low, medium, and high), medium+ (block on medium and high), high+ (block on high only), or none (never block). When left as the empty string this parameter is not sent to the backend, and the Monte Carlo UI setting applies.	no	""
fail-on	Deprecated — use block-on instead. Accepted values: warn_and_fail, fail_only, none. block-on takes precedence when both are set.	no	""
poll-interval	Seconds between poll attempts when waiting for PR agent assessment.	no	30
max-wait	Maximum seconds to wait for PR agent assessment before giving up.	no	300

Outputs

name	description
conclusion	Gate verdict: pass, warn, or fail.
risk-tier	Risk tier from the assessment: high, medium, low, or none.
assessment-source	Source of the assessment: pr_agent, override, none, or error.
response	Full JSON response from the MC Prevent API.