x402
Open standard for internet-native payments and autonomous transactions.
About x402
x402 is an open, neutral standard designed to enable native internet payments between clients and servers. It revives the HTTP 402 Payment Required status code to allow services to monetize APIs and digital content directly, facilitating programmatic and autonomous transactions. Developed by Coinbase, x402 supports monetizing digital resources without complex authentication, enabling AI agents and digital services to transact autonomously and securely across the web.
Who It's For
- •Developers building APIs and web services.
- •Businesses offering digital content or services online.
- •AI and automation developers enabling autonomous transactions.
- •Financial service providers integrating AI for payments.
How It Works
- 1Utilizes the HTTP 402 Payment Required status code to initiate payments.
- 2Web servers return payment details in response to a resource request.
- 3Clients, including AI agents, pay and retry requests with authorization.
- 4Supports monetizing APIs and digital content seamlessly.
How to Use x402
- 1Implement the x402 protocol in your web services.
- 2Return HTTP 402 responses with payment data when resources are requested.
- 3Clients process the payment and retry the request with authorization.
Key Features
- •Standardized in HTTP for web compatibility.
- •Enables automated, agentic payments.
- •Supports monetization without user authentication.
- •Revives and utilizes HTTP 402 status code for payments.
Use Cases
- •Monetizing API access for digital content.
- •Enabling AI agents to transact autonomously.
- •Facilitating in-web payments without user accounts or sessions.
- •Automating content access and digital transactions.
Pros & Cons
Advantages
- •Facilitates seamless, autonomous online payments.
- •Standards-based approach compatible with web technologies.
- •Supports monetization for AI and digital services.
Disadvantages
- •Relies on adoption of the protocol by web servers and clients.
- •New standard requiring implementation effort.
- •Limited widespread adoption or tools at this stage.
Alternatives
- Stripe API
- PayPal API
- Braintree
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Frequently Asked Questions
What is x402?
x402 is an open, neutral standard designed to enable native internet payments between clients and servers. It revives the HTTP 402 Payment Required status code to allow services to monetize APIs and digital content directly, facilitating programmatic and autonomous transactions.
How much does x402 cost?
x402 uses custom pricing — contact the vendor for a quote.
Is x402 free?
x402 is a paid tool and does not offer a free plan.
What are the best x402 alternatives?
Popular x402 alternatives include Stripe API, PayPal API, Braintree.
What is x402 used for?
x402 is commonly used for Monetizing API access for digital content., Enabling AI agents to transact autonomously., Facilitating in-web payments without user accounts or sessions..
Information Accuracy
Please note: While we regularly update all tool information including descriptions, features, pricing, and other details, this information may change over time as tools evolve and update their offerings. For the most current and accurate information, we recommend visiting the official website directly. Our goal is to provide you with comprehensive and up-to-date information to help you make informed decisions.