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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -43,6 +43,18 @@ If using [Poetry](https://python-poetry.org/), all Python dependencies are fetch
 | DAY_IN_NANO | 8.64 * (10 ** 13) | The amount of nanoseconds in 24 hours |
 | JSON_INDENT | 4 | The indent used when dumping a Python object to a .json file |
 
+### `steamrelationships.sr.SteamRelationships()` parameters
+
+| Parameter | Expected Value | Description |
+| :-------: | :------------- | :---------- |
+| webapikey | `str` **(REQUIRED)** | A [Steam Dev API Key](https://steamcommunity.com/dev/apikey) |
+| timeout | `int` (Default: 30) | The number of seconds to wait for a response from Steam before timing out |
+| timeout_retries | `int` (Default: 5) | The number of times to retry after a timeout |
+| reqdelay | `float` (Default: 0.5) | The base number of seconds to wait between requests |
+| delayrand | `int` (Default: 25) | The percentage up or down a delay may vary. *Clamped between 0 and 99, negative values made positive* |
+| reqsafetybuffer | `float` (Default: 0.9) | A percentage of Steam's daily api request limit to stop at. *0.9 stops at 90% of the max* |
+| reqjson | `str` (Default: "requests.json") | Filepath to where the requests json file should be stored |
+
 ### `steamrelationships.sr.SteamRelationships()` methods
 
 | Function | Params | Return Values | Description |