Network Query Engine (NQE) with Postman
The GraphQL schema can be imported manually instead, providing autocomplete (no documentation, sorry). GraphQL Schema Definition Language (SDL) is the only format supported at the moment.
The NQE schema in SDL format can be exported from the Forward platform and manually imported in Postman. See the NQE Github repository for how-to instructions.
After the NQE schema is manually imported, you can easily build the Postman requests by selecting GraphQL, selecting the imported NQE schema, writing the query, send it and… voilà!