x402 Protocol以 402 状态码为基础的开放支付协议，允许 AI 代理和 API 以 HTTP 方式发送即时稳定币微支付。

4.5 (4)

审阅者 Daniel Nikulshyn·更新 2026年6月

Open Protocol Payments Stablecoin AI Agents API HTTP Micropayments Web3

概览

x402 是一个开放、中立的互联网原生支付标准，通过在客户端和服务器之间原生实现支付，弥补了互联网的先天不足。它创造了双赢的经济模式，助力大规模代理支付。x402 直接内置于现有的 HTTP 请求中，无需额外的通信，且协议费用为零。 x402 协议允许任何人基于该协议进行开发或扩展，它是一个中立的标准，不绑定任何特定的网络。这个支付协议非常适合未来的互联网，在那里支付应该是开放、自由和毫不费力的。使用 x402 时，不需要账户或个人信息，也没有中心化的问题。 x402 协议通过 402 状态码实现了基于 HTTP 的支付功能，使支付速度与互联网速度相匹配。x402 协议支持自主支付、即时接入和零等待，使其成为一个高效的支付系统。它打造了一个更加自由和公平的互联网。使用x402，只需添加一行代码即可要求为每个传入请求支付费用。如果请求到达时未支付费用，服务器将以HTTP 402响应，提示客户端支付后重试。商家只需支付名义上的支付网络费用，而客户则无需支付协议费用。

主要功能

使用 402 状态码来在 HTTP 中启用支付
零协议费用为客户端
无需建立账户或个人信息即可即刻激活使用
零中枢化的开放标准
零等待的高效支付系统

价格

模型: Freemium
分类: Crypto AI Agents
评分: 4.5 / 5 (4)

使用场景

通过微支付来赚取 API 的收入

API 提供商可以通过使用 HTTP 402 响应来根据请求收取费用的，接受即时稳定币支付而无需订阅账户或传统的账户和billing 基础设施。

自动化 AI 代理支付

允许 AI 代理在现实中自动为他们消耗的数据、计算或第三方服务付费，从而解锁在标准 HTTP 下的机器与machine 商业。

按需支付内容访问

出版商和工具提供商可以在稳定币微支付后锁定文章、下载或端点，让用户立即无需订阅即可访问资源。

机器人之间服务清算

多个代理系统可以在代理之间支付委托任务，促进去中心化市场，使自动服务可以直接进行直接交易。

优点 & 缺点

优点

开放中立的标准
零协议费用
即刻激活使用
零等待
无需建立账户或个人信息

缺点

零文档或进一步的信息
只有 402 状态码
缺乏 API 访问和支付处理的详细信息

评测

4.5

4 个评分的平均值。

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Marcus Bell

Apr 1, 2026

Years in this space

I've evaluated a lot of these over the years. What stands out here is the core workflow — handled better than most — and the value for money is strong. Pricing gets steep at scale is my one real gripe. Worth the time if this is your use case.

Kwame Mensah

Mar 31, 2026

Solid for our team

We rolled this out across the team last quarter and it is genuinely easy to set up. The onboarding fits neatly into how we already work, and the API removed a step we used to do by hand. but it has held up under daily use.

Grace Okafor

Nov 25, 2025

Solid for our team

We rolled this out across the team last quarter and the value for money is strong. The dashboard fits neatly into how we already work, and the API removed a step we used to do by hand. Pricing gets steep at scale, which is the main caveat, but it has held up under daily use.

Ahmed Saleh

May 30, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on the automation, and it saves real time caught me off guard. The docs could be deeper is why this isn't a perfect score, still, I'd recommend giving it a real trial.

问答

What are the main use cases for x402?

It's designed for AI agents and APIs that need to exchange value automatically, such as paying per API call, unlocking gated endpoints, or enabling micropayments between autonomous agents without manual billing or subscriptions.

Is x402 a paid product or an open protocol?

x402 is an open payment protocol, not a proprietary product, meaning developers can implement it freely. Costs would typically come from the underlying stablecoin transaction fees rather than the protocol itself.

What is the x402 Protocol and how does it work?

x402 is an open payment protocol that enables AI agents and APIs to send instant stablecoin micropayments over HTTP using the standard HTTP 402 ('Payment Required') status code, allowing programmatic, machine-to-machine transactions.