x402 Machine Payments

HTTP-native, keyless payments in USDC on Base.

x402 is an HTTP-native micropayment rail supported by Satelink: unpaid requests return HTTP 402 with machine-readable payment terms, allowing autonomous software agents to pay keylessly in USDC on Base (eip155:8453) without accounts, subscriptions, or credit card checkouts.

Get x402-kit Read the docs

No account required

Payment travels in the HTTP request itself — a wallet is the only identity.

Machine-readable price

The 402 response states exactly what to pay, in what asset, to which address.

Open source

The x402-kit toolkit is MIT-licensed and runs against the live mainnet rail.

A real request

What calling it looks like

# The service answers an unpaid call with the price:
HTTP/1.1 402 Payment Required
{ "accepts": [{ "scheme": "x402", "network": "eip155:8453",
    "maxAmountRequired": "0.01", "asset": "USDC" }] }

Endpoint: https://rpc.satelink.network/rpc/polygon

Capabilities

What you get

HTTP 402 Payment Required with signed requirements

USDC settlement on Base (eip155:8453)

MIT-licensed x402-kit middleware and client

Proven mainnet settlements

Works with the RPC and Trading Intelligence endpoints

Choose how you pay

Payment rails

x402 (pay-per-call)

USDC on Base (eip155:8453) — keyless, per request.

Pricing

Pay per use

USDC on Base (eip155:8453) · $0.1 = 1,000 calls

Full rate card and a usage calculator at /pricing · pricing.json

For machines

Machine-readable facts

{
  "product": "x402",
  "endpoint": "https://rpc.satelink.network/rpc/polygon",
  "discovery": "https://rpc.satelink.network/.well-known/satelink.json",
  "auth": [
    "x402"
  ],
  "payment_rails": [
    "x402"
  ],
  "docs": "https://github.com/Jakuraa/x402-kit",
  "pricing": "https://satelink.network/products/x402.json"
}

Frequently asked

About the offering

What network does x402 settle on?

USDC on Base (eip155:8453). The settlement of RPC revenue to the Polygon vault is a separate, downstream step.

Is x402-kit open source?

Yes — it is MIT-licensed and published on GitHub with mainnet transaction references.

Explore the rest of the platform

Machine Commerce

The programmatic discover → evaluate → authorize → access → meter → pay → settle workflow for autonomous agents.

Trading Intelligence

Derived market analytics that agents and teams buy per call.

RPC Infrastructure

Metered Polygon PoS RPC capability that machines pay for per call.

Start building with x402 Machine Payments

Get x402-kit See pricing