Monad Sonar
Reads the validator peer set by speaking the discovery protocol directly, with no node required. Publishes continuously updated testnet and mainnet peer feeds.
No nodeTestnet + mainnetchecking…
Everything Prooflines has built for Monad: off-node measurement of the network itself, published as live pages, machine-readable feeds and open-source code.
We ran a Monad testnet full node from April to July 2026; the measurement stack now runs off-node, from the discovery protocol and public RPC, with no privileged access. Everything below is recomputed on a schedule and can be checked against its own sources. Unofficial community work, not affiliated with Monad Foundation.
Pages that recompute themselves. Each one states its own method and refresh interval.
Reads the validator peer set by speaking the discovery protocol directly, with no node required. Publishes continuously updated testnet and mainnet peer feeds.
Network-wide health surface: RPC status, peer discovery, latency and an explainable score, refreshed every 30 seconds and consumable without running a node.
The Validator Delegation Program read from on-chain data: registrations, Foundation funding, approvals, active-set rotation and operator concentration.
Where the validator set actually lives: continent, country, operator and ASN stake concentration, with stake-weighted ICMP round-trip latency from a fixed vantage. Rebuilt every 30 minutes, cross-checked daily against the Foundation's own validator data.
Cross-checks each validator's declared infrastructure against what is actually observed: provider, ASN, region. Built on the MRC-13 metadata standard, served as CORS JSON.
Live standings of the Monad Open Source Track pilot: contribution days, merged PRs and open claims across the pool repos, recomputed every 5 minutes from public GitHub data.
Who registers an on-chain agent identity on Monad mainnet, and what happens to it afterwards: registrations over time and the feedback that lands on them.
A live paid endpoint that sells the network concentration report: an agent pays in native MON over HTTP 402 and the server verifies the payment itself, no facilitator. Next to it, the public discovery index of every x402 resource advertising a Monad rail.
Telegram bot for operators: your node's RPC and sync, plus on-chain validator liveness and VDP alerts. The liveness mode needs no RPC access and survives a closed port.
Written work, each one from something we actually ran or measured.
x402, ERC-8004 and EAS are all deployed here. How much of that is used, measured by paying nineteen sellers from our own wallet and reconciling every call against the chain.
Every resource advertising a Monad rail, probed the way a buying agent would, then paid for. That reconciliation is what finds sellers who take payment and return nothing.
How the native-MON, self-verified scheme works in about 200 lines: no facilitator, no contracts, no SDK, with the trade-offs against the official USDC flow stated plainly.
Lessons from shipping a confirm flow in nad-agent: validation before the prompt, provably versus probably wrong, friction budgets, and why per-step approval and declarative policy are halves of one model.
A month running the testnet node from Japan, written for operators: what broke, what we did about it, what we got wrong.
Prometheus, Grafana, textfile metrics and Telegram alerting, as the pattern we actually run rather than a generic tutorial.
Conservative server-to-server migration and rebuild checklist for full nodes, with verification steps and identity-safety rules.
Why placement, clustering and geographic spread matter for network health, and how that reads in the concentration numbers we publish.
What Prooflines contributes to Monad through operations and open source, kept in one place for anyone checking.
The same data the pages above are built from, for agents and scripts. Everything is CORS-enabled and needs no key.
| Endpoint | What it returns |
|---|---|
| /monad/api/live.json | Sentinel network health, 30 second refresh |
| /monad/sonar/index.json | Sonar peer feeds for both networks |
| /monad/vdp-api/ | VDP tracker REST API |
| /monad/x402/ | x402 resource catalogue, testnet |
| /monad/x402-mainnet/ | x402 resource catalogue, mainnet |
| /.well-known/x402 | x402 discovery document |
| /.well-known/agent-card.json | A2A agent card |
| /mcp | Monad network intelligence as MCP tools, POST JSON-RPC |
| /a2a | The same over A2A, POST JSON-RPC |
Real operator artifacts: rules, configs, dashboard JSON and the contribution note as a PDF.
All of it is published for the operator community rather than sold, and every page states how its numbers were produced so they can be recomputed instead of trusted. If something here disagrees with your own measurement, that disagreement is worth more than the page: tell us.