A service tender node functions as an intermediary between subscribers and adjunct telecommunications services from multiple service providers to facilitate negotiation of services in real-time. The service tender node includes an index of services which is maintained and employed to search for applicable services in response to a tender request generated by a subscriber. Records in the index are described with an adaptive service definition which includes standard parameters and subjective parameters. The standard parameters identify types of service pursuant to telecommunications industry standards. The subjective parameters may be specified by individual service providers in order to differentiate their services within the service type defined by the standard parameters. Services generated from a search of the index pursuant to the standard parameters may be further sorted and filtered according to a comparison between a subscriber profile and the subjective parameters.