Credits

Credits are the standard currency in WARFRAME. They are used to purchase Blueprints, Equipment, and some Weapons from the market. They are used in the Foundry as a cost to create an item from a blueprint. Credits are also used in the fusion and transmutation of Mods.

Every time a player completes a mission, they will normally be given a credit reward dependent upon the difficulty of the mission. Players also receive a team credit bonus equal to one tenth the base mission bonus multiplied by the number of teammates (excluding yourself) in the game. Alert missions often come with a high credit reward which is added to the mission's normal credit reward.

Credits can also be obtained from enemy drops, breaking containers, and searching lockers. They can also be gained by selling Mods, Fusion Cores, Weapons, Warframes, and blueprints from a player's inventory. Resources are the only type of items that can't be sold. Credits can be gained with real world money directly via the two Credit Bundles: Frugal and High Roller.

Survival missions offer bonus Credit Caches in small amounts in completion of the mission.

Farming tips
''These are based on opinions and may not be true. These should be viewed as advice unless proven undoubtedly true. Check comments for confirmation.''


 * The Orokin Void is arguably the best way to quickly gain credits. It also has the added bonus of receiving one of the Void Rewards. This (along with the opportunity to find numerous Mods from Treasure Rooms) should make the Void your first choice for credit farming.
 * Rushing any boss like Tyl Regor (around this mission level and easy to kill) will give you 6000 for a 5 minutes (or less) run with Volt.
 * Credits can be gained in large amounts by playing Dark Sectors, especially if the Clan or Alliance controlling the solar rail offers a low or no credit tax rate. Infested spawn at higher numbers than other factions for the most part, which means Eximus enemies also will, so the drop rate for Oberon parts will be higher. These parts can be sold to add to the additional credits of completing the mission and through pickups.
 * Sechura and Hieracon on Pluto can give 20,000 every 5-10 minutes solo. Bear in mind the more people you have in your squad, the more credits you get.
 * Battle pays from either the Grineer or Corpus as part of Invasions and infested outbreaks often yield high amounts of credits for a generally easier mission as the faction you are allied with will supply troops to assist you.
 * Comb through your inventory occasionally. You may find things you don't want and can sell items such as Warframe component blueprints; the credits can quickly add up.

Trivia

 * One credit is equal to 0.0015 U.S. cents.
 * The Credit seems to be of Corpus design