L402
L
L402
Overview :
L402 is an open protocol based on HTTP 402 Payment Required status code and the Lightning Network to implement a native internet payment wall. It provides immediate, low-cost transactions for API monetization and digital services through micropayments, pay-per-use, and fine-grained access control models, unlocking new revenue streams. L402's open protocol encourages innovation and widespread adoption across industries, fostering the development of a vibrant ecosystem of applications and services.
Target Users :
L402 protocol is suitable for digital service providers who need to implement fine-grained access control and secure payment, especially API services, online content publishers, and enterprises requiring flexible payment solutions.
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Use Cases
API service providers use the L402 protocol to implement pay-per-call billing
Online content publishers set up article reading paywalls using L402
Enterprises utilize the L402 protocol to provide fine-grained access control for specific services or data
Features
Supports new monetization models like micropayments and pay-per-use
Open and extensible, encouraging innovation and application across industries
Language-agnostic design ensures seamless integration in different programming environments and platforms
Integration with the Lightning Network enables instant and low-cost digital payments
Utilizes macaroons to implement fine-grained access control and secure token management
Built on HTTP, Lightning Network, and Macaroons, a user-friendly protocol suitable for AI applications and automation systems
How to Use
1. When processing a request to a protected endpoint, the server issues an L402 challenge and returns a 402 Payment Required HTTP response with challenge details.
2. The challenge includes a macaroon (a token granting specific permissions) and a Lightning Network invoice.
3. Upon receiving the HTTP 402 Payment Required status, the client extracts the macaroon and lightning invoice from the challenge.
4. The client pays the lightning invoice and obtains a pre-image, using the macaroon and pre-image to construct an authenticated request.
5. The server verifies the credentials and the proof of completion linked to the challenge, and then provides the requested resource.
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