Agentic Payment Protocols: x402 Leads, Stripe Enters with MPP

MountainAssignment36 · reddit · 2026-08-24

As the agentic economy grows, machine-to-machine payment protocols are emerging. The post compares three key protocols:

x402: A crypto-based (e.g., USDC) decentralized protocol supporting micropayments. It has over 80,000 endpoints, backing from Cloudflare, and >$50M in volume.
Machine Payments Protocol (MPP): Developed by Stripe & Tempo, it supports both fiat and crypto. OpenAI and Anthropic have adopted it, though fiat fees limit microtransactions.
L402: A Bitcoin Lightning Network protocol by Lightning Labs. The author doubts its future due to lack of chain-agnostic flexibility compared to x402.

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