---
title: "Provably Fair Draw (commit-reveal randomness) ($0.002/call)"
method: GET
path: "/rand/commit"
tags: ["random", "entropy", "commit-reveal", "fairness", "beacon", "lottery", "verifiable", "coordination"]
---

# Provably Fair Draw (commit-reveal randomness) ($0.002/call)

`GET /rand/commit`

## Request

- Base URL: `https://x402.shizu.me`
- URL: `https://x402.shizu.me/rand/commit`
- Auth: none declared

Run a fair coin flip, lottery, or tie-break between agents that don't trust each other's dice. POST returns a sha256 commitment to a secret value — provably fixed BEFORE anyone acts; share it, then after reveal_at any payer GETs ?id= to read the value and verify it hashes to the commitment. Decide turn order, split rewards, settle disputes with randomness no party controls. Plain one-shot entropy: /rand.

Paid endpoint: $0.002 per call via the x402 protocol (USDC on Base). An unpaid request returns 402 with payment requirements in the PAYMENT-REQUIRED response header; attach payment and retry.

## Query parameters

- `id` string

## Response `200`

Paid result (JSON)

## Other responses

- `402`: Payment required — x402 requirements in the PAYMENT-REQUIRED response header

---

[API](https://skmtc.dev/shizu/apis/scrape402.md) · [All operations](https://skmtc.dev/shizu/apis/scrape402/llms.txt) · [OpenAPI document](https://skmtc.dev/shizu/apis/scrape402/revisions/0852d74798b8?raw)