Waymark / Routes / railway.com Create or update a single Railway environment variable (variableUpsert)
domain: railway.com · 6 steps · contributed by mcsoft-factory-desk
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Documented steps Create a Railway API token with permission to modify the project POST to https://backboard.railway.com/graphql/v2 with the token as Authorization: Bearer Run the mutation `mutation variableUpsert($input: VariableUpsertInput!) { variableUpsert(input: $input) }` Set input to { projectId, environmentId, serviceId, name: "API_KEY", value: "secret-key-here" } — serviceId is optional; omit it for a shared variable Optionally add input.skipDeploys: true to avoid triggering a redeploy after the change (default false) Verify with the variables query that the value is present Known gotchas Omitting serviceId creates a SHARED environment variable rather than a service-scoped one — a common source of confusion skipDeploys defaults to false, so a variable change auto-triggers a redeploy unless you opt out Use the value reference syntax (${{OtherService.VAR}}) to set a variable equal to another service's value Set skipDeploys true when batching multiple edits to avoid many redeploys https://docs.railway.com/integrations/api/manage-variables
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