Royal Mail Royal Mail Manifests API The Manifests API from Royal Mail — 3 operation(s) for manifests. Documentation GitHub OpenAPI Documentation 📖 Documentation https://api.parcel.royalmail.com/doc/v1/click-and-drop-api-v1.yaml Specifications ⚙ OpenAPI https://raw.githubusercontent.com/api-evangelist/royal-mail/refs/heads/main/openapi/royal-mail-manifests-api-openapi.yml