Codex 额度用量统计

Sun, 12 Apr 2026 00:01:33 +0800

如果你想查看 Codex 当前账号的额度剩余情况，可以直接写一个小脚本去请求 ChatGPT 的 /backend-api/wham/usage 接口。

这类脚本的思路很简单：

从 auth.json 里读取 tokens.access_token 和 tokens.account_id
请求 https://chatgpt.com/backend-api/wham/usage
在请求头里带上 Authorization: Bearer ... 和 ChatGPT-Account-Id
解析返回结果里的五小时窗口和周窗口额度

适合做什么

这个方法适合你在本地快速确认：

五小时额度还剩多少
周额度还剩多少
额度会在什么时候重置

如果你有多个账号，也可以让脚本批量读取 account/*.auth.json，统一输出一张摘要表。 auth.json文件可以从 ~/.codex/ 目录下找到, 对应你当前登录的chatgpt账户。

最关键的输入

脚本通常只依赖两项凭证：

access_token
account_id

它们一般都可以从本地 auth.json 中拿到。只要这两个值有效，请求头就能按下面的形式组织：

headers = {
    "Authorization": f"Bearer {auth_token}",
    "Accept": "application/json",
    "ChatGPT-Account-Id": auth_account_id,
    "Origin": "https://chatgpt.com",
    "Referer": "https://chatgpt.com/",
    "User-Agent": "Mozilla/5.0",
}

返回结果怎么看

接口返回后，重点看的是两类窗口：

five_hour
weekly

脚本可以把它们统一整理成下面几项：

剩余额度百分比
重置时间
对应的时间窗口长度

如果接口字段名有差异，也可以顺手兼容 primary_window、secondary_window、five_hour_limit、weekly_limit 这些变体。

常见问题

如果脚本返回 401，通常说明 access_token 已过期或无效。

如果返回 403，通常说明当前账号没有权限访问这个接口，或者账号状态异常。

如果你看到同一个响应里字段命名不一致，也不用太意外。实际处理时最好把不同命名方式统一映射后再输出。

参考链接

codex-auth-manager：https://github.com/RioArisk/codex-auth-manager

代码

import argparse
import base64
import json
import os
import sys
from datetime import datetime, timedelta, timezone
from pathlib import Path
from typing import Any

import requests


UTC = timezone.utc
CST = timezone(timedelta(hours=8), name="CST")
JSONDict = dict[str, Any]


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        description="Query ChatGPT Codex usage from /backend-api/wham/usage."
    )
    parser.add_argument(
        "account_name",
        nargs="?",
        help="Account name used to load account/<account_name>.auth.json. If omitted, load all *.auth.json files in account/.",
    )
    parser.add_argument(
        "--account-dir",
        default="account",
        help="Directory containing <account_name>.auth.json files.",
    )
    parser.add_argument(
        "--chatgpt-url",
        default="https://chatgpt.com/backend-api/wham/usage",
        help="ChatGPT usage endpoint.",
    )
    parser.add_argument(
        "--raw-json",
        action="store_true",
        help="Print the full JSON response body.",
    )
    parser.add_argument(
        "--raw-headers",
        action="store_true",
        help="Print response headers.",
    )
    return parser.parse_args()


def print_json(data: Any) -> None:
    print(json.dumps(data, indent=2, ensure_ascii=False))


def load_auth_json(path_str: str | Path | None) -> JSONDict | None:
    if not path_str:
        return None
    path = Path(path_str).expanduser()
    if not path.is_file():
        return None
    try:
        return json.loads(path.read_text(encoding="utf-8"))
    except (OSError, json.JSONDecodeError):
        return None


def get_nested_string(data: JSONDict | None, *keys: str) -> str | None:
    current: Any = data
    for key in keys:
        if not isinstance(current, dict):
            return None
        current = current.get(key)
    return current if isinstance(current, str) and current else None


def format_dt(dt: datetime | None) -> str:
    if dt is None:
        return "-"
    return dt.astimezone(CST).strftime("%Y-%m-%d %H:%M:%S %Z")


def format_cst(dt: datetime | None) -> str:
    return format_dt(dt)


def epoch_ms_to_dt(value: Any) -> datetime | None:
    if value is None:
        return None
    try:
        raw = int(value)
    except (TypeError, ValueError):
        return None
    # Newer responses sometimes use epoch seconds, older ones use epoch milliseconds.
    timestamp = raw / 1000 if raw > 10**11 else raw
    return datetime.fromtimestamp(timestamp, tz=UTC)


def first_dict(data: Any, *keys: str) -> JSONDict | None:
    for key in keys:
        value = data.get(key) if isinstance(data, dict) else None
        if isinstance(value, dict):
            return value
    return None


def decode_jwt_exp(token: str) -> datetime | None:
    parts = token.split(".")
    if len(parts) != 3:
        return None
    try:
        payload = parts[1]
        payload += "=" * (-len(payload) % 4)
        data = json.loads(base64.urlsafe_b64decode(payload.encode("ascii")))
        exp = data.get("exp")
        if exp is None:
            return None
        return datetime.fromtimestamp(int(exp), tz=UTC)
    except (ValueError, TypeError, json.JSONDecodeError):
        return None


def get_percent_left(value: JSONDict) -> float | int | None:
    percent_left = value.get("percent_left")
    if percent_left is None:
        percent_left = value.get("remaining_percent")
    if percent_left is not None:
        return percent_left

    used_percent = value.get("used_percent")
    try:
        if used_percent is not None:
            return max(0, 100 - float(used_percent))
    except (TypeError, ValueError):
        return None
    return None


def resolve_limit_window(value: JSONDict) -> JSONDict:
    if (
        "reset_at" not in value
        and "reset_time_ms" not in value
        and isinstance(value.get("primary_window"), dict)
    ):
        return value["primary_window"]
    return value


def parse_limit_entry(name: str, value: Any) -> JSONDict | None:
    if not isinstance(value, dict):
        return None

    value = resolve_limit_window(value)

    percent_left = get_percent_left(value)
    reset_time_ms = value.get("reset_time_ms")
    if reset_time_ms is None:
        reset_time_ms = value.get("reset_at")

    window_seconds = value.get("limit_window_seconds")

    return {
        "name": name,
        "percent_left": percent_left,
        "reset_time_ms": reset_time_ms,
        "reset_at": epoch_ms_to_dt(reset_time_ms),
        "limit_window_seconds": window_seconds,
    }


def infer_limit_name(window_seconds: Any) -> str | None:
    if not isinstance(window_seconds, (int, float)):
        return None
    if window_seconds <= 6 * 3600:
        return "five_hour"
    if window_seconds >= 6 * 24 * 3600:
        return "weekly"
    return None


def relabel_rate_limits(primary: JSONDict | None, secondary: JSONDict | None) -> tuple[JSONDict | None, JSONDict | None]:
    for entry in (primary, secondary):
        if not entry:
            continue
        inferred_name = infer_limit_name(entry.get("limit_window_seconds"))
        if inferred_name:
            entry["name"] = inferred_name

    if primary and secondary and primary.get("name") == secondary.get("name"):
        if primary.get("name") == "weekly":
            primary["name"] = "five_hour"
        else:
            secondary["name"] = "weekly"

    if primary and primary.get("name") == "weekly" and secondary is None:
        return None, primary

    if secondary and secondary.get("name") == "five_hour" and primary is None:
        return secondary, None

    return primary, secondary


def parse_rate_limits(data: JSONDict) -> tuple[JSONDict | None, JSONDict | None]:
    primary = None
    secondary = None

    for primary_key in ("five_hour", "five_hour_limit", "five_hour_rate_limit", "primary"):
        if primary_key in data:
            primary = parse_limit_entry("five_hour", data.get(primary_key))
            if primary:
                break

    for secondary_key in ("weekly", "weekly_limit", "weekly_rate_limit", "secondary"):
        if secondary_key in data:
            secondary = parse_limit_entry("weekly", data.get(secondary_key))
            if secondary:
                break

    if primary is None:
        primary = parse_limit_entry("five_hour", data.get("primary_window"))
    if secondary is None:
        secondary = parse_limit_entry("weekly", data.get("secondary_window"))

    return relabel_rate_limits(primary, secondary)


def format_percent(value: Any) -> str:
    return f"{value:g}" if isinstance(value, (int, float)) else str(value if value is not None else "-")


def percent_sort_value(value: Any, descending: bool) -> tuple[int, float]:
    if isinstance(value, (int, float)):
        numeric_value = float(value)
        return (0, -numeric_value if descending else numeric_value)
    return (1, 0.0)


def get_auth_paths(account_dir: str, account_name: str | None) -> list[Path]:
    base_dir = Path(account_dir)
    if account_name:
        return [base_dir / f"{account_name}.auth.json"]
    return sorted(base_dir.glob("*.auth.json"))


def get_account_name_from_path(path: Path) -> str:
    suffix = ".auth.json"
    return path.name[: -len(suffix)] if path.name.endswith(suffix) else path.stem


def build_summary_row(account_name: str, five_hour: JSONDict | None, weekly: JSONDict | None) -> JSONDict:
    return {
        "account": account_name,
        "five_hour_percent": five_hour["percent_left"] if five_hour else None,
        "weekly_percent": weekly["percent_left"] if weekly else None,
        "weekly_reset_at": weekly["reset_at"] if weekly else None,
    }


def print_summary_rows(rows: list[JSONDict]) -> None:
    if not rows:
        return

    sorted_rows = sorted(
        rows,
        key=lambda row: (
            percent_sort_value(row.get("five_hour_percent"), descending=True),
            percent_sort_value(row.get("weekly_percent"), descending=True),
            format_cst(row.get("weekly_reset_at")),
            row["account"],
        ),
    )

    display_rows = []
    for row in sorted_rows:
        display_rows.append(
            {
                "account": str(row["account"]),
                "five_hour": format_percent(row.get("five_hour_percent")),
                "weekly": format_percent(row.get("weekly_percent")),
                "weekly_reset": format_cst(row.get("weekly_reset_at")),
            }
        )

    headers = {
        "account": "account",
        "five_hour": "five_hour%",
        "weekly": "weekly%",
        "weekly_reset": "weekly_reset",
    }
    widths = {
        key: max(len(headers[key]), max(len(item[key]) for item in display_rows))
        for key in headers
    }

    print(
        f"{headers['account']:<{widths['account']}}  "
        f"{headers['five_hour']:>{widths['five_hour']}}  "
        f"{headers['weekly']:>{widths['weekly']}}  "
        f"{headers['weekly_reset']:<{widths['weekly_reset']}}"
    )
    for item in display_rows:
        print(
            f"{item['account']:<{widths['account']}}  "
            f"{item['five_hour']:>{widths['five_hour']}}  "
            f"{item['weekly']:>{widths['weekly']}}  "
            f"{item['weekly_reset']:<{widths['weekly_reset']}}"
        )


def validate_token_inputs(
    token: str,
    account_id: str,
    auth_token: str | None,
    auth_account_id: str | None,
) -> int | None:
    if token.startswith("sess-"):
        print("status: invalid_token_type", file=sys.stderr)
        print(
            "message: --chatgpt-token looks like a session token (sess-...). Use the JWT access_token instead.",
            file=sys.stderr,
        )
        if auth_token:
            print(
                "hint: Found tokens.access_token in auth.json; omit --chatgpt-token or pass that value instead.",
                file=sys.stderr,
            )
        return 1

    token_exp = decode_jwt_exp(token)
    if token_exp is not None and token_exp <= datetime.now(UTC):
        print("status: expired", file=sys.stderr)
        print(f"message: access_token expired at {format_dt(token_exp)}", file=sys.stderr)
        if auth_token and auth_token != token:
            auth_token_exp = decode_jwt_exp(auth_token)
            hint = format_dt(auth_token_exp) if auth_token_exp else "unknown time"
            print(f"hint: auth.json contains a different access_token expiring at {hint}", file=sys.stderr)
        return 1

    if auth_account_id and account_id != auth_account_id:
        print("warning: supplied --account-id does not match auth.json tokens.account_id", file=sys.stderr)

    return None


def handle_error_response(response: requests.Response, data: Any, raw_json: bool) -> int | None:
    if response.status_code == 401:
        print("status: expired", file=sys.stderr)
        print("message: Token 已过期或无效", file=sys.stderr)
        if raw_json:
            print_json(data)
        return 3

    if response.status_code == 403:
        print("status: forbidden", file=sys.stderr)
        print("message: 账号已被封禁或无权访问", file=sys.stderr)
        if raw_json:
            print_json(data)
        return 3

    if response.status_code >= 400:
        print(f"HTTP {response.status_code}", file=sys.stderr)
        print_json(data)
        return 3

    return None


def fetch_chatgpt_usage(auth_path: Path, args: argparse.Namespace) -> tuple[int, JSONDict | None]:
    auth_data = load_auth_json(auth_path)
    account_name = get_account_name_from_path(auth_path)
    auth_token = get_nested_string(auth_data, "tokens", "access_token")
    auth_account_id = get_nested_string(auth_data, "tokens", "account_id")

    if not auth_data:
        print(f"{account_name}: auth file not found or invalid", file=sys.stderr)
        return 1, None

    if not auth_token:
        print(f"{account_name}: missing access_token", file=sys.stderr)
        return 1, None

    if not auth_account_id:
        print(f"{account_name}: missing account_id", file=sys.stderr)
        return 1, None

    validation_error = validate_token_inputs(
        auth_token,
        auth_account_id,
        auth_token,
        auth_account_id,
    )
    if validation_error is not None:
        return validation_error, None

    headers = {
        "Authorization": f"Bearer {auth_token}",
        "Accept": "application/json",
        "ChatGPT-Account-Id": auth_account_id,
        "Origin": "https://chatgpt.com",
        "Referer": "https://chatgpt.com/",
        "User-Agent": "Mozilla/5.0",
    }

    try:
        response = requests.get(args.chatgpt_url, headers=headers, timeout=60)
    except requests.RequestException as exc:
        print(f"Request failed: {exc}", file=sys.stderr)
        return 2, None

    if args.raw_headers:
        print("=== Headers ===")
        print_json(dict(response.headers))
        print()

    try:
        data = response.json()
    except ValueError:
        print(f"HTTP {response.status_code}", file=sys.stderr)
        print(response.text, file=sys.stderr)
        return 3, None

    error_response = handle_error_response(response, data, args.raw_json)
    if error_response is not None:
        return error_response, None

    if args.raw_json:
        print("=== Raw JSON ===")
        print_json(data)
        print()

    rate_limits = first_dict(data, "rate_limit", "rate_limits")

    if rate_limits is None:
        return 0, build_summary_row(account_name, None, None)

    five_hour, weekly = parse_rate_limits(rate_limits)
    return 0, build_summary_row(account_name, five_hour, weekly)


def main() -> None:
    args = parse_args()
    auth_paths = get_auth_paths(args.account_dir, args.account_name)
    if not auth_paths:
        print("No auth files found.", file=sys.stderr)
        sys.exit(1)

    exit_code = 0
    summary_rows: list[JSONDict] = []
    for auth_path in auth_paths:
        current_exit_code, summary_row = fetch_chatgpt_usage(auth_path, args)
        exit_code = max(exit_code, current_exit_code)
        if summary_row is not None and not args.raw_json:
            summary_rows.append(summary_row)

    if summary_rows:
        print_summary_rows(summary_rows)
    sys.exit(exit_code)


if __name__ == "__main__":
    main()