Context. The X–ray burster 4U 1850−087, located in the Galactic globular cluster NGC 6712, is an ultracompact binary (orbital period ∼21 minutes), likely harbouring a degenerate companion. Aims. The source has been observed at soft γ-rays several times with the INTEGRAL satellite, during the monitoring of the Galactic plane, with an unprecedented exposure time. We analysed all available INTEGRA...