pythonprc 2.0.0

An easy-to-use wrapper for PRC's ER:LC server API!

PythonPRC

An async Python wrapper for the PRC Private Server API — the API for ER:LC private servers.

Installation

pip install pythonprc

For webhook signature verification, you'll also need cryptography (installed by default) or optionally PyNaCl:

pip install "pythonprc[nacl]"

Quickstart

import asyncio
from pythonprc import PythonPRC

async def main():
    client = PythonPRC("your-server-key")

    info = await client.get_server(players=True)
    print(f"{info.name}: {info.current_players}/{info.max_players} players")

    for player in info.players:
        print(player.username, player.team, player.location)

asyncio.run(main())

Authentication

All requests require a server key, obtained from your private server's settings in-game (Settings → search "API key"). Pass it as the first argument to PythonPRC.

If you have a global API key (issued by PRC for large-scale apps), pass it as global_api_key:

client = PythonPRC("your-server-key", global_api_key="your-global-key")

Client

PythonPRC(
    server_key: str,
    global_api_key: str | None = None,
    max_retries: int = 3,       # retries on 5xx / connection errors
    backoff_base: float = 1.0,  # base seconds for exponential backoff
)

The client exposes a single low-level method and several high-level convenience methods.

Low-level

await client.request(method, path, **kwargs)

Passes **kwargs directly to aiohttp. Handles rate limiting, backoff, and error raising automatically. Returns the parsed JSON body.

Rate limiting

The client reads X-RateLimit-* headers on every response and tracks state per bucket. If a bucket is exhausted it will proactively sleep before the next request rather than hitting a 429. On a 429 it raises RateLimitError with retry_after and bucket attributes.

---

Methods

get_server(**flags) → ServerInfo

Fetches server status. All sub-resources are opt-in:

info = await client.get_server(
    players=True,
    staff=True,
    join_logs=True,
    queue=True,
    kill_logs=True,
    command_logs=True,
    mod_calls=True,
    emergency_calls=True,
    vehicles=True,
)

Only request what you need — each flag adds data to the response.

send_command(command: str) → str

Runs a command in-game as virtual server management. Returns the API's confirmation message.

await client.send_command(":h Welcome to the server!")
await client.send_command(":kick Username Reason")

Convenience methods

Each of these calls get_server with the relevant flag and returns the list directly:

await client.get_players()         # list[Player]
await client.get_staff()           # list[StaffMember]
await client.get_join_logs()       # list[JoinLogEntry]
await client.get_queue()           # list[int]  (Roblox user IDs)
await client.get_kill_logs()       # list[KillLogEntry]
await client.get_command_logs()    # list[CommandLogEntry]
await client.get_mod_calls()       # list[ModCall]
await client.get_emergency_calls() # list[EmergencyCall]
await client.get_vehicles()        # list[Vehicle]

---

Models

ServerInfo

Attribute	Type
name	str
owner_id	int
co_owner_ids	list[int]
current_players	int
max_players	int
join_key	str
acc_verified_req	str
team_balance	bool
players	list[Player] | None
staff	list[StaffMember] | None
join_logs	list[JoinLogEntry] | None
queue	list[int] | None
kill_logs	list[KillLogEntry] | None
command_logs	list[CommandLogEntry] | None
mod_calls	list[ModCall] | None
emergency_calls	list[EmergencyCall] | None
vehicles	list[Vehicle] | None

Player

Attribute	Type
username	str
roblox_id	int
team	Team
permission	Permission
callsign	str | None
wanted_stars	int
location	PlayerLocation | None
is_wanted	bool (property)

PlayerLocation

Attribute	Type
x	float
z	float
postal_code	str
street_name	str
building_number	str

StaffMember

Attribute	Type
roblox_id	int
username	str
role	Permission

Vehicle

Attribute	Type
name	str
owner	str
plate	str
texture	str | None
color_hex	str | None
color_name	str | None

JoinLogEntry

Attribute	Type
player	str
timestamp	int
joined	bool

KillLogEntry

Attribute	Type
killer	str
killed	str
timestamp	int

CommandLogEntry

Attribute	Type
player	str
command	str
timestamp	int

ModCall

Attribute	Type
caller	str
moderator	str | None
timestamp	int

EmergencyCall

Attribute	Type
team	str
caller_id	int
player_ids	list[int]
position	tuple[float, float]
started_at	int
call_number	int
description	str
position_descriptor	str

---

Enums

Team

Civilian, Sheriff, Police, Fire, DOT, Unknown

Permission

Normal, Moderator, Admin, Server Owner, Unknown

---

Errors

All errors inherit from ERLCError.

Exception	When
ERLCError	Base class for all errors
RateLimitError	HTTP 429 — has .retry_after (seconds) and .bucket
AuthenticationError	HTTP 403 / bad keys
InvalidServerKeyError	Invalid or expired server key specifically
ServerOfflineError	Server has no players (HTTP 422)
CommandRestrictedError	Command is restricted
OutdatedModuleError	In-game module is out of date

from pythonprc import PythonPRC
from pythonprc.errors import RateLimitError, ServerOfflineError

try:
    await client.send_command(":shutdown")
except ServerOfflineError:
    print("No players in server")
except RateLimitError as e:
    print(f"Rate limited, retry in {e.retry_after}s")

---

Webhooks

ER:LC can POST events to your endpoint. Every request is signed with Ed25519 and must be verified before acting on it.

Currently sent events: messages starting with ; (custom in-game commands) and emergency calls.

from pythonprc.webhook import verify_signature, WebhookVerificationError

# aiohttp example
async def handle_webhook(request):
    raw_body = await request.read()
    try:
        verify_signature(
            timestamp=request.headers["X-Signature-Timestamp"],
            sig_hex=request.headers["X-Signature-Ed25519"],
            raw_body=raw_body,
        )
    except WebhookVerificationError:
        raise web.HTTPUnauthorized()

    payload = await request.json()
    ...

To set up your webhook URL, go to your private server settings and search for Event Webhook. Paste an HTTPS URL that can receive JSON POST requests. Append ?long=true to receive extended payloads with type information.

---

License

GPL-3.0-only — see LICENSE.

pythonprc is not affiliated with or endorsed by PRC or the ER:LC team.