PayPerByte MCP Server
A Model Context Protocol server that gives AI agents direct access to PayPerByte — verified, provenance-first data feeds for AI agents. Agents discover feeds, pay-per-call via x402 (settled in USDC on Base mainnet), or subscribe to on-chain streams (Arbitrum Sepolia testnet). Every paid x402 response carries an EIP-712 PayloadAttestation receipt (X-BYTE-Attestation header) the agent verifies before acting. No tokens, no API keys, no off-chain accounts.
Two rails — read this before setting
PRIVATE_KEY.
- x402 pay-per-call (
byte_buy_data): Base mainnet (eip155:8453), REAL USDC. Paid feeds settle real money — the flagship Address Reputation Oracle is $0.05 per verdict. Use a dedicated wallet holding only what you intend to spend.- On-chain subscribe/publish/query layer (BYTE Library contracts + indexer): Arbitrum Sepolia testnet (chain
421614), MockUSDC. Mainnet for this layer is gated on an external security audit. The EIP-712 attestation signing domain stays anchored at421614regardless of which rail you paid on.One
PRIVATE_KEYserves both rails. Never reuse a key holding funds you can't afford to spend.






