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Proof Of X

Proof Of X is an open-source TypeScript project with a Next.js serverless endpoint that verifies Helius Solana transaction webhook POSTs and requests an NFT mint through Crossmint when a token burn exceeds a configured minimum. It also includes a separate front end for initiating burns and an optional Discord notification bot.

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Independent OpenViST project profile, based on linked sources.

Proof Of X — OpenViST project profile in NFTs & Gaming.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it as a codebase reference when building a Solana burn-to-NFT reward workflow or adapting the webhook verification pattern to another event.

Who it is for

  • Developers building NFT rewards around qualifying Solana token burns
  • Teams exploring webhook-based on-chain event reward workflows

Documented uses

  • Validate and authorize incoming Helius webhook requests.
  • Check that a transaction is a token burn and that the burned amount exceeds a configured minimum.
  • Request an NFT mint for the burner through Crossmint.
  • Optionally send Discord notifications for the event.
Before you choose

Requirements & limits

  • The front end for initiating token burns is separate from the webhook backend.
  • The documented integration requires Helius webhook configuration and Crossmint environment values.
  • Discord credentials are only needed if the optional notification bot is enabled.
  • The README reports that the BURN feed excludes inner-transaction burns and BurnChecked transactions.
  • The README notes serverless execution limits and a possible NFT metadata rendering issue on some platforms.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Prepare the project for a Helius burn webhook

Set up the documented project configuration and local development environment before connecting a deployed webhook.

Before you start

  • The project source repository
  • A Crossmint developer account for the Crossmint environment variables
  • A self-generated AUTH_CODE
  • Discord developer keys only if Discord notifications remain enabled

Steps

  1. Clone the repository and rename .env.example to .env.

  2. Set the environment variables, including AUTH_CODE and the Crossmint values; provide Discord keys if notifications are enabled.

  3. Install dependencies with yarn and start the app with yarn dev.

  4. After launching the server, configure a Helius webhook for the documented Enhanced Transaction BURN type and direct it to the serverless endpoint.

Expected outcome

The project is configured for local development and the documented Helius burn-webhook integration.

Guide limitations

  • The README says the webhook should be deployed only after the server is launched.
  • The documented BURN feed omits inner-transaction burns and BurnChecked transactions.
  • Vercel execution limits and occasional timeouts are noted; the README does not establish current provider limits.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
18 October 2026
Original website title
amilz/proof-of-x · Official homepage title · retained in its source language
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