Planet Express Marketplace

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name: planetexpress-marketplace description: Decentralized file marketplace on Monad blockchain — buy, sell, and browse encrypted files with x402 homepage: https://planetexpress.dropclaw.cloud user-invocable: true

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Planet Express Marketplace — Decentralized File Commerce

A decentralized marketplace for buying and selling encrypted files on Monad blockchain. Escrow-secured transactions with multi-chain payment support via x402.

Quick Reference

API Base: https://dropclaw.cloud/marketplace

Protocol: x402 (HTTP 402 payment flow)

Chain: Monad (chainId 143)

Contract: 0xeFc5D4f6ee82849492b1F297134872dA2Abb260d

Payment: MON, SOL, or Base USDC

Frontend: https://planetexpress.dropclaw.cloud

Endpoints

Browse Listings (Free)

GET /marketplace/listings

Returns all active marketplace listings.

Get Listing Detail (Free)

GET /marketplace/listing/{id}

Returns listing detail with pricing in MON/SOL/USDC.

Purchase a File (x402 Payment)

POST /marketplace/purchase
Content-Type: application/json
{
  "listingId": 123,
  "buyerAddress": "0x..."  // optional
}

Triggers x402 flow: receive 402 → pay on preferred chain → retry with X-PAYMENT header.

List a File for Sale ($30 Listing Fee)

POST /marketplace/list
Content-Type: application/json
{
  "fileId": "dropclaw-file-id",
  "title": "My File",
  "description": "What this file contains",
  "skillFileUri": "ipfs://Qm...",
  "keyHash": "0x...",
  "price": "0.5"
}

Requires x402 payment of $30 listing fee.

Purchase Flow

1. GET /marketplace/listings to browse available files 2. GET /marketplace/listing/{id} for detail + pricing 3. POST /marketplace/purchase with { listingId } — receive 402 with payment options 4. Send payment on your preferred chain (MON, SOL, or USDC on Base) 5. Retry POST with X-PAYMENT: base64(JSON({ network, txHash })) 6. Receive the encrypted file + skill file for decryption

Listing Flow

1. First store your file via DropClaw (POST /vault/store) — this gives you a fileId 2. POST /marketplace/list with file details and price — triggers $30 listing fee via x402 3. Pay the listing fee on any supported chain 4. Your file appears in the marketplace for others to purchase

Fees

| Fee | Amount | Notes | |-----|--------|-------| | Listing fee | $30 USD | Paid when listing a file for sale | | Buyer fee | ~$1 USD | Added to purchase price | | Delivery fee | 2.5% | Of listing price | | FARNS buyback | 50% | Half of all protocol fees buy $FARNS |

Payment Chains

Monad (eip155:143) — MON native, direct contract interaction

Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp) — SOL, facilitated

Base (eip155:8453) — USDC, facilitated

Frontend

The marketplace has a fully decentralized frontend hosted on IPFS:

Web: https://planetexpress.dropclaw.cloud

IPNS: k51qzi5uqu5di1vh2ybr8qipy8mod859fjb0i548af7qyopyctlv7zpjblukee

Install SDK: npm i dropclaw or pip install dropclaw