Payperbyte
PayPerByte — an MCP server for a per-byte USDC data marketplace on Arbitrum. AI agents discover first-party publishers, subscribe to live feeds or pay-per-call via x402, and verify-before-act: recompute keccak256 of received data and check it against the publisher's on-chain EIP-712 PayloadAttestation before trusting it. The payment can clear while the data is garbage — the verify gate catches that.
Install: npx -y byte-mcp-server · also on the Official MCP Registry as
io.github.0rkz/byte-protocol.
15 tools — 10 read-only (no wallet): discover publishers & feeds, network
stats, subscription health, token balances, fact-oracle queries
(byte_query_fact), and the verify-before-act gate (byte_verify_payload). 5 need
a PRIVATE_KEY: byte_subscribe, byte_unsubscribe, byte_register_publisher,
byte_publish_data, and byte_buy_data (x402 pay-per-call).
Arbitrum Sepolia testnet; settlement in USDC. No API keys, no token. Every settlement emits an EIP-712 PayloadAttestation for a cryptographic delivery receipt.
Server Config
{
"mcpServers": {
"byte-library": {
"command": "npx",
"args": [
"-y",
"byte-mcp-server"
]
}
}
}