> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meterlane.app/llms.txt
> Use this file to discover all available pages before exploring further.
# Meterlane Introduction: USDC Payments for Agents and B2B
> Meterlane gives you two USDC payment products — an x402 Agent Gateway and a Stablecoin Corridor — under one dashboard on Base L2.
Meterlane is metered USDC payment infrastructure with two products. **Agent Gateway** wraps any HTTP API with the x402 protocol so AI agents can pay per request in USDC without OAuth or subscription flows. **Stablecoin Corridor** lets you quote and settle USDC into local fiat currencies — BRL, MXN, NGN, KES, and ZAR — for B2B payouts powered by Circle CPN. Both products share a single org in the [Meterlane dashboard](https://meterlane.app), where you manage API keys, routes, wallets, and billing.
## Agent Gateway
Agent Gateway turns any HTTP endpoint into a paid API. When an agent calls a protected route without payment, your gateway returns **HTTP 402 Payment Required** along with an `X-Payment-Requirements` header describing the price and accepted currency. A compatible agent client — like the open-source `@meterlane/x402` SDK — reads those requirements, signs an ERC-3009 USDC authorization, and retries the request with an `X-PAYMENT` header. The gateway verifies the payment via the x402 facilitator and proxies the request to your upstream. No checkout page, no API key handed to the agent, no subscription.
**What you build with it:**
* Paid inference or tool-call APIs for LangChain, OpenAI Agents, and custom agents
* Internal per-request chargeback between agent teams and platform owners
* MCP (Model Context Protocol) backends with metered access
## Stablecoin Corridor
Stablecoin Corridor is a programmable USDC-to-fiat payout rail. You call the Corridor API to create a corridor quote for a destination currency, send USDC from your org wallet, and Circle CPN settles local fiat to your beneficiary — typically in minutes. All quotes, transactions, and settlement statuses appear in your dashboard with a full audit trail.
**What you build with it:**
* Supplier payments for importers in Brazil, Mexico, Nigeria, or Kenya
* Cross-border payroll funded from a USDC treasury
* Programmatic FX settlement replacing manual wire flows
## Environments
All examples in this documentation use **Base Sepolia** with test USDC — no real funds are at risk during development. When you are ready to go live, Meterlane's team gates production access to ensure compliance and key safety.
| Environment | Network | Gateway URL | Corridor URL | USDC |
| ----------- | ----------------------------- | ------------------------------- | -------------------------------- | -------------- |
| Sandbox | Base Sepolia (`eip155:84532`) | `https://gateway.meterlane.app` | `https://corridor.meterlane.app` | Test USDC only |
| Production | Base mainnet (`eip155:8453`) | `https://gateway.meterlane.app` | `https://corridor.meterlane.app` | Real USDC |
Never use a mainnet private key in sandbox examples. Test USDC from the Circle faucet has no real value and is safe to use in development scripts.
## Dashboard and billing
Sign up at [meterlane.app](https://meterlane.app) to create an org. Your org holds API keys, routes, wallets, and a billing plan. Agent Gateway plans start at $49/month; Stablecoin Corridor plans start at $199/month. Both products include a 14-day trial with full sandbox access.
Production corridor payouts and mainnet gateway traffic require a human-gated go-live review. Contact the Meterlane team from your dashboard to request production access.
Make your first paid API call in under five minutes using the sandbox.
Routes, pricing, API keys, and middleware configuration.
Quotes, settlements, and supported currency corridors.
Definitions for x402, facilitator, org, route, ERC-3009, and more.