If you then know what kind of sample agreement/contract this is, you can provide a more specific translation, e.g., "Sample License Agreement".

Plenty of KudoZ glossary entries. Take your pick. Contract template suggests to me the form and layout, rather than the substance, but I recall the term from legal drafting theory only and not from actual practice.

Anyway many samples or specimes owill come from Contract *Precedent* Books.

Obiter, standard contract denotes to me un contrato tipo (cf. model contract! : West) or de adhesión.

(standard rendering)

A standard-form contract is otherwise known as standardized contract. Standard-form contract is usually a preprinted contract containing set clauses. Such contract is mostly used by a business or within a particular industry by making slight additions or modifications in order to meet the specific situation. Since a standard-form contract favors the drafting party, they can amount to adhesion contracts. Unforeseeable contingencies affecting performance, such as strikes, fire, and transportation difficulties can be taken care of with the help of standard-form contract.
https://definitions.uslegal.com/s/standard-form-contract/

Depending on the context and on how it is to be used