x402 Work Demo Base mainnet

A minimal paid API: POST /work with any JSON payload, pay $0.001 USDC per call via the x402 payment protocol, and receive the payload's SHA-256 digest with delivery deduplication. It is the reference workload of the open-source NEAR x402 Facilitator, which settles USDC on NEAR and Base.

Try it

curl -i -X POST https://x402-demo-base.mikedotexe.com/work \
  -H 'Content-Type: application/json' \
  -d '{"hello":"x402"}'

1. The unpaid call above returns 402 Payment Required with a PAYMENT-REQUIRED header (base64 JSON) describing the accepted payment.
2. An x402 client signs the payment and retries with a PAYMENT-SIGNATURE header.
3. The server settles through the facilitator and returns the digest plus a PAYMENT-RESPONSE header with the on-chain transaction.

This demo dual-emits: the canonical x402 v2 PAYMENT-REQUIRED header plus a legacy v1 JSON body for 0.x clients, and accepts both PAYMENT-SIGNATURE (v2) and legacy X-PAYMENT (v1) payments.

Payment details

For agents & machines