PayPerByte — per-byte data for AI agents: x402 USDC on Base, EIP-712-attested. No token.
The current version, v0.12.3, was published to the official MCP registry on 2026-09-03. It is distributed as byte-mcp-server on npm and as a hosted remote over streamable-http, filed under Other by this index, and declares 3 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.
Using io.github.0rkz/byte-protocol in Claude, Cursor, Gemini CLI, Cline, or Zed? #
MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).
Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less
uv tool install mcpindex-gate && mcpindex-config-wire
Semantic screen found no manipulation pattern in the description. Conformance probe not yet run.
mcpindex.integrity.description
passINFOevidence“No hidden instructions”via static_description
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- Semantic screen only - the deterministic conformance probe has not run on this server
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- Confidence is reported but not yet calibrated (v1)
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- Screen reads the tool description, not the live behavior
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- advisory
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- registry description only no input schema
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- Still current: the description we screened is unchanged, re-checked against the registry
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- The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not
Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.
Own this server? Screen its description →
That verdict was true at screening time (snapshot 2026-09-03). #
Contracts can change after screening, with no version bump. The gate pins io.github.0rkz/byte-protocol’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.
See your first HOLD in 2 minutes →
Related: how to trust an MCP server · screen before install · silent contract drift
People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.
[Independent trust record for io.github.0rkz/byte-protocol](https://mcpindex.ai/server/io-github-0rkz-byte-protocol) - screening verdict, registry provenance, and contract drift monitoring.
<a href="https://mcpindex.ai/server/io-github-0rkz-byte-protocol">Independent trust record for io.github.0rkz/byte-protocol</a> - screening verdict, registry provenance, and contract drift monitoring.
A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.
[](https://mcpindex.ai/server/io-github-0rkz-byte-protocol)
<a href="https://mcpindex.ai/server/io-github-0rkz-byte-protocol"><img src="https://mcpindex.ai/api/v1/badge/io-github-0rkz-byte-protocol" alt="mcpindex verdict" height="20" /></a>
PRIVATE_KEY
Ethereum private key for write/buy tools (subscribe, unsubscribe, publish, buy_data). buy_data spends real Base-mainnet USDC — use a dedicated wallet. Not required for read-only tools.
RPC_URL
RPC for the on-chain library + EIP-712 attestation layer (Arbitrum Sepolia, eip155:421614). The x402 buy rail settles USDC on Base mainnet and needs no RPC here. Defaults to Arbitrum Sepolia public RPC.
BYTE_GATEWAY_ATTESTER
Gateway attester address byte_buy_data pins receipts against. Defaults to the current PayPerByte gateway attester (rotated 2026-08-19; previous default 0x77c86a...C472 is retired). Override only if the gateway discloses a rotation you need ahead of a package update - see /.well-known/agent.json receipt.attester and receipt.retiredAttesters.
AgentRoamai.agentroam/agentroam
Buy travel eSIMs, gift cards and mobile top-ups with crypto — user confirms before any order.
Authoryzeai.authoryze/authoryze
Give your AI agent a spending limit: approval controls and single-use virtual cards.
io.github.0x-devc/novai-mcp-serverio.github.0x-devc/novai-mcp-server
Read-only MCP server for querying the live NOVAI blockchain over its public JSON-RPC endpoint.