On-chain analytics and tooling for agentic payments.
| blocksigner-x402 | Agent World — an x402 resource server on Algorand MainNet where persistent autonomous agents are commissioned per request. Live |
| provenance-site | The x402 Trust Index — wash-risk grades for machine-payable API endpoints, computed from publicly observable on-chain payments and published as dated snapshots. Open data, CC BY 4.0. Live |
| provenance-mcp | MCP server that scores an endpoint's payment history before an agent pays it. Listed in the Model Context Protocol registry. |
| provenance-guard | Pre-payment wash-risk check for x402 clients — one line between a client and its wallet. Fails open by default; can be set to fail closed. |
| agentkit | Monorepo for three agentic-payments products on a shared x402 foundation. Reorg-safe Base + Algorand indexer, typed facilitator registry. |
| entanglement-channel-lab | Quantum-information experiments on Amazon Braket, including a published null result. |
Leaderboards for machine-payable APIs rank by claimed volume, which is easy to inflate — self-dealing loops, fresh-wallet farms, metronomic bots. Provenance estimates how much of an endpoint's revenue looks organic from public on-chain payments. In our dated snapshot of the top 24 Coinbase Bazaar merchants (week of 2026-06-29, Base) about a quarter of claimed volume looked non-organic; that is one operator's estimate for that sample, with the weights, limits and unvalidated parts published alongside it.