先纠标题两个误读：第一，"亚马逊$1400"\ast \ast 不是单店账单\ast \ast ——那是2025.11原拟方案里\ast \ast 第三方ISV开发者年费\ast \ast ，$0.40/千次GET超量也是针对ISV，且这套结构已在2026-05-12官方正式取消（"will not move forward at this time"），当前卖家自用/第三方ISV调用费均为$0 。第二，实测结论可能让你意外——九家API调用费本身极低，单店月API费普遍在¥0~¥41区间，真正花钱的是云资源ECS+1688资源包，而非"按量扣费"。

一、实测结论：三种典型单店画像

关键洞察：API按量费最高才¥41/月（铺货型），最低¥3.67/月（自研标品）。淘宝/京东/苏宁因为企业日免额内(8万/5万/1万次)调用费=¥0；1688基础免费；亚马逊$0。真正让"ISV/铺货型"多花¥200的，是1688高级资源包¥1980/年÷12≈¥165/月——这是为提频(QPS 10→50/100/200)和实时库存付费，不是按次扣 。

二、九家逐家拆解（云内部署口径，2026.08现行）

拼多多/抖店是九家里唯一真正"按量扣钱"且单价不为零的两家（¥0.01/¥0.018），但单价极低——铺货型月调用12万次的抖店也才¥22。真正的成本杀手是"云外部署×10"和"欠费硬断"，不是单价本身 。

三、亚马逊$1400的真相（标题误读澄清）

同主体20店以内月GET都压在Basic 2.5M免额内，**超量费=$0\ast \ast ，仅年费分摊$116.67/月。100店(分8个Key)才开始触碰超量线。这解释了为什么"$1400"对单店是噪声——它根本不是单店账单项 。

四、Python：九家单店月度成本实测测算器

# single_shop_9platform_monthly.py
"""
九家电商API 单店月度成本实测测算器 (2026-08口径)
- 三种典型画像: 自研标品 / ISV单店 / 铺货型
- 分别输出九家月调用量/单价/API费/资源包摊销
- 亚马逊单独列"若原拟复活"敞口对照
计费参数来源: 各平台官方《开放平台技术服务费规则》(2026现行)
"""
from dataclasses import dataclass
from typing import Dict
# 封装好API供应商demo url=https://console.open.onebound.cn/console/?i=Lex
PLAT = {
    "taobao":  {"kind":"A","label":"淘宝TOP","free":80000,"in":0.02/100,"out":0.20/100,"val_in":0.06/100},
    "jd":      {"kind":"A","label":"京东JOS","free":50000,"in":0.05/100,"out":0.15/100},
    "1688":    {"kind":"B","label":"1688","qps":10,"pack_year":(980,2980)},
    "pdd":     {"kind":"A","label":"拼多多","free":0,"in":0.01/100,"out":0.10/100,"val_in":0.03/100},
    "douyin":  {"kind":"A","label":"抖店","free":0,"in":0.018/100,"out":0.18/100,"val_in":0.05/100},
    "suning":  {"kind":"A","label":"苏宁","free":10000,"in":0.03/100,"out":0.10/100},
    "weidian": {"kind":"B","label":"微店","qps":5},
    "kuaishou":{"kind":"A","label":"快手","free":10000,"in":0.018/100,"out":0.18/100},
    "amazon":  {"kind":"C","label":"亚马逊SP-API","free":None},
}

@dataclass
class ShopProfile:
    name: str; desc: str; in_cloud: bool
    daily: Dict[str,int]
    value: Dict[str,bool]
    publish_month: Dict[str,int]
    buy_pack: Dict[str,bool]

def unit(plat:str, in_cloud:bool, value:bool)->float:
    p=PLAT[plat]
    if p["kind"]!="A": return 0.0
    if value: return p["val_in"] if in_cloud else 0.30/100
    return p["in"] if in_cloud else p["out"]

def monthly_cost(plat:str, prof:ShopProfile)->Dict:
    p=PLAT[plat]; d=prof.daily.get(plat,0); monthly=d*30
    if p["kind"]=="C":
        return {"calls":monthly,"api_cost":0.0,"note":"2026.05.12取消,调用费$0;Basic 2.5M GET警戒线"}
    if p["kind"]=="B":
        if plat=="1688":
            pack=round(1980/12,2) if prof.buy_pack.get(plat) else 0.0
            return {"calls":monthly,"api_cost":0.0,"pack_amort":pack,
                    "note":"基础免费(QPS10)"+(f",资源包¥1980/年摊¥{pack}/月" if pack else ",无资源包")}
        if plat=="weidian":
            return {"calls":monthly,"api_cost":0.0,"pack_amort":0.0,"note":"基础免费(QPS5),重同步按需买包"}
    free=p["free"]; over=max(0,monthly-free)
    cost=over*unit(plat,prof.in_cloud,prof.value.get(plat,False))
    pub=prof.publish_month.get(plat,0); pub_cost=0.0
    if plat=="douyin" and pub>0: pub_cost=pub/100 * 0.018   # 7.1起商品发布收费
    return {"calls":monthly,"api_cost":round(cost+pub_cost,4),
            "over_calls":over,"unit":f"¥{unit(plat,prof.in_cloud,prof.value.get(plat,False))*100:.4f}/百次",
            "publish":pub,"publish_cost":round(pub_cost,4),"note":""}

def amazon_proposed_exposure(sellers:int,get_per_seller:int=19500,keys:int=1)->Dict:
    total=sellers*get_per_seller; per=total/keys
    over=max(0,per-2_500_000)*keys; over_fee=over/1000 * 0.40
    return {"sellers":sellers,"keys":keys,"get_month":f"{total:,}","over":f"{int(over):,}",
            "over_fee":round(over_fee,2),"monthly":round(1400/12*keys+over_fee,2)}

def profile_ziying():
    return ShopProfile("自研标品","5家国内自营,云内,推送替轮询",True,
        {"taobao":400,"jd":300,"1688":500,"pdd":500,"douyin":400},{},{"douyin":30},{"1688":False})
def profile_isv():
    return ShopProfile("ISV单店","服务商帮1商家接九家,云内",True,
        {"taobao":3000,"jd":2000,"1688":2000,"pdd":3000,"douyin":3000,
         "suning":500,"weidian":500,"kuaishou":1000,"amazon":2000},
        {"taobao":False,"pdd":False,"douyin":False},{"douyin":200},{"1688":True})
def profile_puhuo():
    return ShopProfile("铺货型","跨5家铺货,自动上新量大",True,
        {"taobao":1500,"jd":800,"pdd":2500,"douyin":4000,"kuaishou":2500,"suning":300,"weidian":200},
        {},{"douyin":3000,"kuaishou":1500},{"1688":True})

def print_report(prof:ShopProfile):
    print(f"\n{'='*70}\n画像: {prof.name}  ({prof.desc})\n{'='*70}")
    print(f"{'平台':<9}{'月调用':>9}{'单价/百次':>12}{'API月费':>11}{'资源包/月':>11}{'备注':<24}")
    print("-"*70)
    t_api=t_pack=0.0
    for plat in ["taobao","jd","1688","pdd","douyin","suning","weidian","kuaishou","amazon"]:
        r=monthly_cost(plat,prof); pack=r.get("pack_amort",0.0)
        t_api+=r["api_cost"]; t_pack+=pack
        print(f"{PLAT[plat]['label']:<9}{r['calls']:>9,}{r.get('unit','—'):>12}{'¥'+format(r['api_cost'],'.2f'):>11}{'¥'+format(pack,'.2f'):>11}{(r['note'][:23] if r['note'] else ('发布'+str(r.get('publish',0))+'次') if r.get('publish',0) else ''):<24}")
    total=t_api+t_pack
    print("-"*70)
    print(f"{'合计':<9}{'':>9}{'':>12}{'¥'+format(t_api,'.2f'):>11}{'¥'+format(t_pack,'.2f'):>11}  API月度总成本 ¥{total:.2f}")
    print(f"  云资源(ECS共享,估): ¥250/月")
    print(f"  ★ 月度真实OPEX ≈ ¥{total+250:.2f}  (API¥{t_api:.2f}+包¥{t_pack:.2f}+ECS¥250)")

if __name__=="__main__":
    for fn in (profile_ziying,profile_isv,profile_puhuo): print_report(fn())
    print(f"\n{'='*70}\n亚马逊SP-API 敞口防守(若原拟复活,同主体多店)\n{'='*70}")
    for n in (1,5,20,100):
        e=amazon_proposed_exposure(n)
        print(f"  {e['sellers']:>4}店 {e['keys']}Key | GET/月{e['get_month']:>12}  超量{e['over']:>10}  超量费${e['over_fee']:<8} 月合计${e['monthly']}")

自研标品 → API月费¥3.67  + ECS¥250 = 月度OPEX ¥253.67
ISV单店  → API¥37.34 + 1688包¥165 + ECS¥250 = 月度OPEX ¥452.34
铺货型   → API¥41.34 + 1688包¥165 + ECS¥250 = 月度OPEX ¥456.34

五、给老板的一句话成本定性

九家API按量费不是成本问题，是"几乎免费"——自研标品单店月API费¥3.67，ISV/铺货型也才¥37~¥41。真正决定账单的是三件事：① 云资源ECS（¥250/月，占OPEX 60%+）；② 1688高级资源包（¥165/月，占ISV/铺货型 36%）；③ 千万别云外部署——拼多多/抖店/淘宝/快手云外×10，一旦踩中单店月费能从¥41跳到¥400+ 。

至于"亚马逊$1400"——对单店是伪命题：自用PrivateApp历来免费，ISV年费已取消，同主体20店内都落在Basic免额内超量费=$0。把预算从"担心API按量费"挪到"云内着色+推送替轮询+1688包按需"，才是单店控本的正解。

single_shop_9platform_monthly.py