T402 SandboxTESTNET

Test payments on 7 testnets. No API key. No real funds. Just code.

What is T402?

T402 is an open-source HTTP-native payment protocol for stablecoins. Servers return HTTP 402 with payment instructions — clients sign off-chain, resubmit, and the facilitator verifies and settles on-chain. This sandbox lets you test the entire flow with zero real funds.

Payment Flow

Quick Start

import { HTTPFacilitatorClient } from "@t402/core";

const client = new HTTPFacilitatorClient({
  url: "https://sandbox.t402.io"
});

import "github.com/t402-io/t402/sdks/go/http"

client := http.NewFacilitatorClient(&http.FacilitatorConfig{
    URL: "https://sandbox.t402.io",
})

from t402 import FacilitatorClient

client = FacilitatorClient({"url": "https://sandbox.t402.io"})

import io.t402.client.HttpFacilitatorClient;

var client = new HttpFacilitatorClient("https://sandbox.t402.io");

# Check supported networks
curl -s https://sandbox.t402.io/supported | jq

# Get faucet links
curl -s https://sandbox.t402.io/faucets | jq

# Verify with magic test address (always succeeds)
curl -s -X POST https://sandbox.t402.io/verify \
  -H "Content-Type: application/json" \
  -d '{"paymentPayload":{"payload":{"payer":"0x0000000000000000000000000000000000CAFE01"}},"paymentRequirements":{"network":"eip155:84532"}}'

Supported Networks

Get Test Tokens

Use faucets to get testnet tokens, or use magic test addresses to skip tokens entirely.

Magic Test Addresses

Use these as the payer field to get deterministic responses — no real tokens needed. Full list (JSON) →

Endpoints

Rate Limits

100 requests/minute per IP. Headers: X-RateLimit-Limit, X-RateLimit-Remaining.

Sandbox → Production

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