# Radius

*The payment engine for agentic commerce*

Accept payments for APIs, data, and content. Enable your agents and applications to pay for what they use.

* [**Accept payments**](/build/accept-payments.md): Charge for API routes per request with radius-sdk, settled in SBC on Radius.
* [**Make payments**](/build/make-payments.md): Pay x402 endpoints from an app, agent, or terminal within spending limits you set.
* [**Reference**](/reference.md): radius-sdk, radius-cli, the facilitator API, network settings, fees, and JSON-RPC.
* [**Architecture**](/architecture.md): How a payment moves through Radius, from authorization to delivery.

## What is Radius?

Radius is a high-throughput, low-cost, stablecoin-native payment engine for agentic commerce: agents buying resources or services on a user's behalf. `radius-sdk` adds payments to a TypeScript API or client, and its Ethereum-compatible interfaces let developers use familiar wallets, signing tools, and libraries.

* [Why Radius](/why-radius.md): high throughput, low costs, stablecoin-native payments, enterprise integration, and micropayments.
* [Try Radius](/try.md): create a testnet wallet, send SBC, and pay for an API request from your browser.
* [Architecture](/architecture.md): follow a payment from authorization to delivery, and see how the engine and its operating model work.

## Explore Radius for your business

* [CDNs and edge platforms](/solutions/cdns.md): paid access at the edge for customer APIs and content.
* [Payment providers](/solutions/payment-providers.md): agentic payments for merchants and platforms.
* [Data providers](/solutions/data-providers.md): charge for individual queries, records, and results.
* [Web publishers](/solutions/publishers.md): paid access to articles, feeds, and archives.

## Find implementation details

* [radius-sdk reference](/reference/radius-sdk.md), [radius-cli reference](/reference/radius-cli.md), and the [facilitator API](/reference/facilitator-api.md).
* [x402 payments](/build/x402.md): how a paid request works on Radius.
* [Coding assistants](/build/coding-assistants.md): build with an LLM using Radius skills: [radius-dev](https://docs.radiustech.xyz/skills/radius-dev.md), [dripping-faucet](https://docs.radiustech.xyz/skills/dripping-faucet.md), [x402](https://docs.radiustech.xyz/skills/x402.md), and [sell-api](https://docs.radiustech.xyz/skills/sell-api.md).