Coal is the commerce platform for the agent economy on 0G.

It provides:

• A full merchant commerce stack — products, hosted checkout, payment links, subscriptions, paywalls, automated revenue splits

• Autonomous wallet-based purchasing for AI agents via x402 (Coinbase) and OKX APP on the same rails as humans

• A multi-tenant MCP server (13 tools) so Claude / Cursor / OpenAI agents can shop on Coal with one config line

Watch / Try / Verify

🎥 Pitch video (judges) https://youtu.be/FOieBgJ3j4A

🎥 Launch / demo video https://youtu.be/fnlcOIcK-yk

📄 Pitch deck (PDF) https://www.usecoal.xyz/coal-pitch-deck.pdf

🌐 Live platform https://usecoal.xyz

🤖 Live agent sandbox https://agent.usecoal.xyz

🛒 Demo store https://store.usecoal.xyz

🔌 MCP server https://mcp.usecoal.xyz/api/mcp

✅ 0G health (live) https://api.usecoal.xyz/api/0g/health

📦 React SDK on npm coal-react v0.4.1

💻 GitHub https://github.com/emmanuel39hanks/coal

The Problem

Today, merchants must choose between:

Stripe:

• No crypto support

• No autonomous agent purchasing

Raw x402:

• Only a bare HTTP 402 handshake

• No products, checkout, subscriptions, receipts, or dashboards

There is no complete commerce layer for the agent economy.

Coal fills this gap — and ties every payment to 0G for full verifiability.

Who Uses Coal

1. Human Shoppers

• Pay via hosted checkout links

• Use MetaMask or any Base-compatible wallet

• Receive a public receipt verification page with a 3-step proof trail
  

2. AI Agents (autonomous)

• Discover merchants via /api/agent/discover

• Programmatically create checkout sessions

• Sign ERC-3009 USDC transfers off-chain

• Receive the same 3-step proof trail as humans

• Gasless — Coal's operator wallet submits signed transactions on their behalf
  

3. Claude / Cursor / Custom Agents (via MCP)

• One config line in Claude Desktop or Cursor

• 13 MCP tools cover discovery, paywall checks, payment, receipts, downloads

• Multi-tenant — every user provides their own wallet key as a header; server holds no shared secrets

0G Integrations — 5 Components (All on Mainnet)

1. 0G Storage (Log Layer)

• Stores payment receipts as immutable, content-addressed JSON

• Holds encrypted merchant memory (AES-256-GCM)

• Holds x402 paywall manifests

• Deduplicated via payload hash
  

2. 0G Chain

Contract: CoalReceiptAnchor V2 Address: 0x24a80A3Bb16d26D4063Ecd4B2fD64C6856E25E8b

• Anchors SHA-256 hash of every receipt

• Uses DASigners precompile (epochNumber())

• Stamps DA epoch into each anchor event
  

1. 0G Compute

• Runs AI commerce queries: merchant memory lookup, policy evaluation, product routing

• Provides TEE attestation via broker.inference.verifyService

• Powers the agent demo with Qwen on the decentralized GPU network

• Sealed inference with per-response attestation

4. 0G KV

• Mutable mirror layer

• Keeps merchant profiles + memory pointers always fresh

• Ensures real-time agent discovery without walking the full log history

5. 0G DA

• Streams payment events via gRPC (Singapore sidecar)

• Event types:

1. payment_confirmed

2. subscription_created

3. subscription_renewed

4. webhook_delivered

5. paywall_access_granted

6. receipt_anchored

The Proof Trail

Every payment (human or agent) generates a 3-step verifiable trail:

1. Base transaction confirmed — USDC settled with ~2s finality

2. Receipt stored on 0G Storage — immutable, content-addressed

3. Receipt hash anchored on 0G Chain — SHA-256, tamper-proof

Public verification page: usecoal.xyz/verify/{session-id}

A judge can click it for any paid session.

Coal started as a crypto checkout platform that won 🥇 1st Place at the MNEE Hackathon.

During the 0G APAC Hackathon, it evolved into full-stack commerce infrastructure for the agent economy.

Below is exactly what shipped during this hackathon period.

New 0G Integrations (All on Mainnet)

1. 0G Chain — Receipt Anchoring (V2 Upgrade)

• Deployed CoalReceiptAnchor V2 at: 0x24a80A3Bb16d26D4063Ecd4B2fD64C6856E25E8b

• Calls DASigners precompile via epochNumber()

• Embeds DA epoch into every anchored event

Three anchor functions:

• anchorReceipt

• anchorEntitlement

• anchorProfile

2. 0G Compute — Verifiable AI Execution

• Per-response TEE attestation

• Verified via broker.inference.verifyService

• Response metadata includes:

  1. verificationStatus: sealed_tee

  2. provider

  3. timestamp
     

3. 0G KV — Real-Time State Layer

• Merchant profile → merchant:profile:latest

• Memory pointer → merchant:memory:latest

• Paywall manifests → paywall:{id}:manifest:latest

4. 0G DA — Event Streaming Pipeline

• gRPC-based system with custom .proto definitions

• 6 event types

• Blob dispersal + confirmation polling (≤5 retries)

• Fire-and-forget non-blocking architecture

Dedicated sidecar (Singapore EC2): 54.179.237.217:51001

5. 0G Storage — Immutable Data Layer

• Published merchant profiles + encrypted memory snapshots

• Content-addressed storage with payload hash deduplication

Agent-Native Features

Agent Discovery: GET /api/agent/discover

Returns active merchants, products, paywalls, and 0G Storage roots verifiable on-chain.

Autonomous Agent Sandbox: https://agent.usecoal.xyz

Features:

1. Auto-created Privy wallets per user

2. Local persistence

3. MetaMask funding

4. Balance polling every 10s
   

Full loop: discover → checkout → pay → verify

Gasless Payments (ERC-3009)

1. Agent signs transferWithAuthorization off-chain

2. Operator wallet submits

3. Gas (~$0.001) covered by Coal
   

x402 Paywalls

1. Full HTTP 402 flow with X-PAYMENT header

2. On-chain verification via ERC-20 event decoding

3. 200 OK after payment
   

Dual-protocol

• Same /verify endpoint accepts:

  1. Coinbase x402 (v1)

  2. OKX APP (v2) envelopes
     

Double-spend protection

1. Verifies session existence before transfer

Human Commerce Features

Public Receipt Verification https://usecoal.xyz/verify/{id}

Includes:

• 3-step proof trail

• Live badges (Base / Storage / Chain)

• Direct explorer links
  

0G Monitoring Panel

• Real-time health across all 5 components

• Activity feed

• Manual publish trigger
  

Merchant Console

• Products

• Payment links

• Paywalls

• Subscriptions

• Team management

• Transactions

• Analytics

Payment Infrastructure

Verification cron

1. Minimum 2-block confirmations

2. Sanctions screening

3. Atomic transaction upserts

4. Optimistic session locking
   

Async anchoring

1. Retries failed writes from backlog
   

7 security passes

1. Timing-safe auth

2. Sanctions screening

3. SSRF protection

4. RBAC for financial operations

5. Block confirmation enforcement

6. TOCTOU protections

7. Atomic verification guarantees

Developer Experience

• Full OpenAPI 3.0.3 spec https://api.usecoal.xyz/api/docs/ui

• Public docs https://usecoal.xyz/docs

Covers:

1. Architecture

2. 0G integrations

3. Examples
   

Runnable example apps

1. coal-react-checkout

2. coal-agent

3. coal-mcp-server

4. coal-oracle-agent

5. demo-store
   

React SDK shipped on npm as coal-react v0.4.1

MCP server with 13 tools listed on Smithery and the official MCP Registry

Traction

Distribution

• Smithery directory — listed and indexed

• Official MCP Registry — listed and indexed

• npm: coal-react v0.4.1

• Docs site live at usecoal.xyz/docs
  

Engagement Beyond Code

• Walkthrough articles for builders + merchants

• Small bounty program — developers building things on top of Coal

• Test users running real flows on the agent sandbox

• Daily replies + DMs across X, LinkedIn, Farcaster, Reddit, Discord, Telegram
  

Inbound Signal

"x402 + APP wire compat actually working is a real one — not many builders go through both envelopes… happy to point the mapper crawler at agent.usecoal.xyz for endpoint stability data showing up in our public catalog."

— CDP-verified Coinbase Developer Platform builder

Past Credibility

🥇 1st Place — MNEE Hackathon (Best Commerce & Creator Tooling) — Devpost (https://devpost.com/software/coal-programmable-commerce)

Coal has now evolved into full-stack commerce infrastructure for the agent economy through the 0G APAC Hackathon.

Live Proof Anyone Can Check Right Now

Funding & Outlook

Coal is currently self-funded.

• No venture capital raised

• Funded through prize winnings from the MNEE Hackathon

  • 🥇 1st Place - Best Commerce & Creator Tooling

Partnerships & Opportunities

Open to conversations with:

• Ecosystem funds

• Grant programs

• Strategic partners

Specifically those aligned with:

• Agent economy infrastructure

• On-chain commerce

• AI × crypto integrations

Go-To-Market Direction

The 0G APAC Hackathon submission serves as the foundation for public launch.

Focus:

• Crypto-native merchants

• Developers building agent-driven applications

Core value:

• A single payment infrastructure that works for:

  • Humans

  • Autonomous AI agents

• Both operating on the same rails