X402 provides a single API that lets autonomous AI agents pay for LLM inference, data feeds, tool calls, and decentralized GPU compute using stablecoin wallets with enforceable spending caps. The platform routes requests to multiple providers, settles payments on zero‑fee plasma chains, and offers real‑time monitoring and flexible pricing models.
Funding
Funding not disclosed
Founders
Product
Problem
Developers building autonomous AI agents must manage multiple cloud accounts, reserved instances, and disparate billing models to pay for LLM inference, data feeds, tool calls, and decentralized compute, leading to complex cost tracking and operational overhead.
Solution
X402 offers a unified, trustless payment layer that lets AI agents pay for all required services through a single API endpoint. The platform routes requests to various LLMs, data providers, tool services, and decentralized GPU networks, handling token‑ or call‑based billing in USD‑denominated stablecoins. Each agent receives a self‑custodial wallet with enforceable spending caps, and payments settle on plasma‑optimized chains with zero gas fees and near‑instant finality. Developers can choose per‑request payments, time‑based subscriptions, or hybrid models, while built‑in monitoring tracks every transaction in real time.
Target Audience
Primary customers are developers and enterprises building autonomous AI agents, multi‑agent platforms, and AI‑driven applications that require seamless, cost‑effective access to LLMs, data feeds, tool services, and decentralized compute.
Features
- Single API endpoint that aggregates routing to any LLM (e.g., GPT‑4o, Claude, Llama, Gemini) with per‑token billing
- Pay‑per‑call integration for tools such as web search, image generation, code execution, audio transcription, and browser automation
- Decentralized GPU compute jobs billed per job, eliminating the need for cloud accounts or reserved instances
- Self‑custodial wallets for each agent, powered by Tether WDK, with hard spending caps enforced at the wallet layer
- Stablecoin‑optimized plasma chains provide zero gas fees, facilitator fees paid in USD‑stable, and near‑instant settlement
- Flexible pricing options: per‑request, subscription‑based unlimited access, or dynamic pricing based on task complexity
- ERC‑4337 smart account settlement enables on‑chain account abstraction and advanced payment flows
- Real‑time monitoring dashboard that logs every payment, call, and agent activity for audit and budget control