diff --git a/markdown/bitburner.bladeburner.getactionestimatedsuccesschance.md b/markdown/bitburner.bladeburner.getactionestimatedsuccesschance.md
index c7ae69af6..9e94e63b9 100644
--- a/markdown/bitburner.bladeburner.getactionestimatedsuccesschance.md
+++ b/markdown/bitburner.bladeburner.getactionestimatedsuccesschance.md
@@ -9,7 +9,7 @@ Get estimate success chance of an action.
 **Signature:**
 
 ```typescript
-getActionEstimatedSuccessChance(type: string, name: string): [number, number];
+getActionEstimatedSuccessChance(type: string, name: string, sleeve?: number): [number, number];
 ```
 
 ## Parameters
@@ -18,6 +18,7 @@ getActionEstimatedSuccessChance(type: string, name: string): [number, number];
 |  --- | --- | --- |
 |  type | string | Type of action. |
 |  name | string | Name of action. Must be an exact match. |
+|  sleeve | number | _(Optional)_ Optional. Sleeve number to check for success. |
 
 **Returns:**
 
diff --git a/markdown/bitburner.bladeburner.md b/markdown/bitburner.bladeburner.md
index 25d08d6ff..6af1eaceb 100644
--- a/markdown/bitburner.bladeburner.md
+++ b/markdown/bitburner.bladeburner.md
@@ -24,7 +24,7 @@ You have to be employed in the Bladeburner division and be in BitNode-7 or have
 |  [getActionCountRemaining(type, name)](./bitburner.bladeburner.getactioncountremaining.md) | Get action count remaining. |
 |  [getActionCurrentLevel(type, name)](./bitburner.bladeburner.getactioncurrentlevel.md) | Get the current level of an action. |
 |  [getActionCurrentTime()](./bitburner.bladeburner.getactioncurrenttime.md) | Get the time elapsed on current action. |
-|  [getActionEstimatedSuccessChance(type, name)](./bitburner.bladeburner.getactionestimatedsuccesschance.md) | Get estimate success chance of an action. |
+|  [getActionEstimatedSuccessChance(type, name, sleeve)](./bitburner.bladeburner.getactionestimatedsuccesschance.md) | Get estimate success chance of an action. |
 |  [getActionMaxLevel(type, name)](./bitburner.bladeburner.getactionmaxlevel.md) | Get the maximum level of an action. |
 |  [getActionRepGain(type, name, level)](./bitburner.bladeburner.getactionrepgain.md) | Get the reputation gain of an action. |
 |  [getActionSuccesses(type, name)](./bitburner.bladeburner.getactionsuccesses.md) | Get action successes. |
diff --git a/src/NetscriptFunctions/Bladeburner.ts b/src/NetscriptFunctions/Bladeburner.ts
index 069635066..a16d1bfd3 100644
--- a/src/NetscriptFunctions/Bladeburner.ts
+++ b/src/NetscriptFunctions/Bladeburner.ts
@@ -11,6 +11,7 @@ import { getEnumHelper } from "../utils/EnumHelper";
 import { Skills } from "../Bladeburner/data/Skills";
 import { assertString } from "../Netscript/TypeAssertion";
 import { BlackOperations, blackOpsArray } from "../Bladeburner/data/BlackOperations";
+import { checkSleeveAPIAccess, checkSleeveNumber } from "../NetscriptFunctions/Sleeve";
 
 export function NetscriptBladeburner(): InternalAPI<INetscriptBladeburner> {
   const checkBladeburnerAccess = function (ctx: NetscriptContext): void {
@@ -27,7 +28,6 @@ export function NetscriptBladeburner(): InternalAPI<INetscriptBladeburner> {
       throw helpers.errorMessage(ctx, "You must be a member of the Bladeburner division to use this API.");
     return bladeburner;
   };
-
   function getAction(ctx: NetscriptContext, type: unknown, name: unknown): Action {
     const bladeburner = Player.bladeburner;
     assertString(ctx, "type", type);
@@ -117,10 +117,20 @@ export function NetscriptBladeburner(): InternalAPI<INetscriptBladeburner> {
         1000
       );
     },
-    getActionEstimatedSuccessChance: (ctx) => (type, name) => {
+    getActionEstimatedSuccessChance: (ctx) => (type, name, _sleeve) => {
       const bladeburner = getBladeburner(ctx);
       const action = getAction(ctx, type, name);
-      return action.getSuccessRange(bladeburner, Player);
+      if (_sleeve != null) {
+        checkSleeveAPIAccess(ctx);
+        const sleeveNumber = helpers.number(ctx, "sleeve", _sleeve);
+        checkSleeveNumber(ctx, sleeveNumber);
+        if (action.type === BladeActionType.contract) {
+          const sleevePerson = Player.sleeves[sleeveNumber];
+          return action.getSuccessRange(bladeburner, sleevePerson);
+        } else return [0, 0];
+      } else {
+        return action.getSuccessRange(bladeburner, Player);
+      }
     },
     getActionRepGain: (ctx) => (type, name, _level) => {
       checkBladeburnerAccess(ctx);
diff --git a/src/NetscriptFunctions/Sleeve.ts b/src/NetscriptFunctions/Sleeve.ts
index 24113c9e4..6657f7c75 100644
--- a/src/NetscriptFunctions/Sleeve.ts
+++ b/src/NetscriptFunctions/Sleeve.ts
@@ -16,24 +16,24 @@ import { getAugCost } from "../Augmentation/AugmentationHelpers";
 import { Factions } from "../Faction/Factions";
 import { SleeveWorkType } from "../PersonObjects/Sleeve/Work/Work";
 
+export const checkSleeveAPIAccess = function (ctx: NetscriptContext) {
+  if (Player.bitNodeN !== 10 && !Player.sourceFileLvl(10)) {
+    throw helpers.errorMessage(
+      ctx,
+      "You do not currently have access to the Sleeve API. This is either because you are not in BitNode-10 or because you do not have Source-File 10",
+    );
+  }
+};
+
+export const checkSleeveNumber = function (ctx: NetscriptContext, sleeveNumber: number) {
+  if (sleeveNumber >= Player.sleeves.length || sleeveNumber < 0) {
+    const msg = `Invalid sleeve number: ${sleeveNumber}`;
+    helpers.log(ctx, () => msg);
+    throw helpers.errorMessage(ctx, msg);
+  }
+};
+
 export function NetscriptSleeve(): InternalAPI<NetscriptSleeve> {
-  const checkSleeveAPIAccess = function (ctx: NetscriptContext) {
-    if (Player.bitNodeN !== 10 && !Player.sourceFileLvl(10)) {
-      throw helpers.errorMessage(
-        ctx,
-        "You do not currently have access to the Sleeve API. This is either because you are not in BitNode-10 or because you do not have Source-File 10",
-      );
-    }
-  };
-
-  const checkSleeveNumber = function (ctx: NetscriptContext, sleeveNumber: number) {
-    if (sleeveNumber >= Player.sleeves.length || sleeveNumber < 0) {
-      const msg = `Invalid sleeve number: ${sleeveNumber}`;
-      helpers.log(ctx, () => msg);
-      throw helpers.errorMessage(ctx, msg);
-    }
-  };
-
   const sleeveFunctions: InternalAPI<NetscriptSleeve> = {
     getNumSleeves: (ctx) => () => {
       checkSleeveAPIAccess(ctx);
diff --git a/src/ScriptEditor/NetscriptDefinitions.d.ts b/src/ScriptEditor/NetscriptDefinitions.d.ts
index 682965916..c3f34fd77 100644
--- a/src/ScriptEditor/NetscriptDefinitions.d.ts
+++ b/src/ScriptEditor/NetscriptDefinitions.d.ts
@@ -3144,9 +3144,10 @@ export interface Bladeburner {
    *
    * @param type - Type of action.
    * @param name - Name of action. Must be an exact match.
+   * @param sleeve - Optional.  Sleeve number to check for success.
    * @returns Estimated success chance for the specified action.
    */
-  getActionEstimatedSuccessChance(type: string, name: string): [number, number];
+  getActionEstimatedSuccessChance(type: string, name: string, sleeve?: number): [number, number];
 
   /**
    * Get the reputation gain of an action.