> ## Documentation Index > Fetch the complete documentation index at: https://agentcash.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # AgentCash Router > An open-source TypeScript router for shipping pay-per-call APIs on x402 and MPP with minimal boilerplate. We've tested tens of thousands of endpoints and found that the hand-rolled ones tend to break in the details, with malformed 402 challenges, network identifiers agents can't settle against, and missing discovery metadata. **The [`@agentcash/router`](https://github.com/merit-systems/agentcash-router) gets all of this right for you.** The router is the fastest and most effective way to ship an API on x402 and MPP. Just define routes with a fluent builder, and the router handles payment challenges, verification, settlement, wallet identity, and discovery. ## What you get **Every pricing model.** One route definition and support every pricing model across x402 and MPP. ```typescript theme={null} router.route('search').paid('0.01').handler(run); // fixed price router.route('research').upTo('0.05').handler(meter); // billed as the handler works router.route('llm').session({ unitCost: '0.0001' }).stream(gen); // per-unit, SSE streaming ``` **[Discovery](/discovery) built in.** Your route definitions generate the documents that get you indexed by [x402scan](https://x402scan.com), [mppscan](https://mppscan.com), and [AgentCash](https://agentcash.dev), so agents can instantly find, understand, and call your API. ```text theme={null} GET /openapi.json → OpenAPI 3.1 with pricing extensions GET /llms.txt → plain-text guidance for agents ``` **Identity without accounts.** `.siwx()` verifies who's calling with a wallet signature, giving you per-user state with no signup flow or API keys. ```typescript theme={null} router.route('inbox').siwx().handler(async ({ wallet }) => inboxFor(wallet)); router.route('report').paid('0.01').siwx().handler(fn); // pay once, replay free ``` ## Deploy in one click The recommended way to start is the Vercel template: a working pay-per-call API that exercises every pricing mode. Deploy with Vercel See the [quickstart](/router/quickstart) for the full walkthrough. Deploy the template or add the router to an existing app. Every auth mode with examples. Next.js, Hono, Bun, Node, and discovery endpoints. Environment variables, KV stores, and plugin hooks.