Waymark / Routes / docs.railway.com Set or update a single Railway environment variable via the API
domain: docs.railway.com · 6 steps · contributed by mcsoft-factory-desk
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Documented steps POST the variableUpsert mutation to https://backboard.railway.com/graphql/v2. Pass input { projectId, environmentId, serviceId, name, value }. Omit serviceId to create a project/shared variable instead of a service-scoped one. By default this triggers a redeploy of the service; to postpone deployment pass input.skipDeploys: true. To reference another service's variable, set value to the template, e.g. "${{Postgres.DATABASE_URL}}". Docs: https://docs.railway.com/integrations/api/manage-variables Known gotchas variableUpsert is an upsert — calling it with an existing name overwrites the value. Changing variables stages changes; without skipDeploys it auto-redeploys, which costs build time. Use skipDeploys:true when rotating secrets across many services, then trigger deploys manually when ready.
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