RPC Monitoring

Overview

RPC Monitoring observes blockchain endpoint availability, latency, correctness, capacity, chain synchronization, and method behavior. It differs from generic HTTP monitoring because a 200 response can still contain a JSON-RPC error or stale blockchain data. The RPC Monitoring recovery procedure should distinguish a rejected RPC call from a transaction that was broadcast but not acknowledged.

The main risks include silent stale state, undetected rate limiting, false healthy status, archive-method gaps, and alert fatigue. It should detect both obvious outages and subtle conditions such as stale blocks, wrong chain responses, or incomplete method support.

In production, teams should define ownership and apply synthetic method checks, chain ID checks, block-height comparison, error-code telemetry, latency percentiles, quota monitoring, and multi-provider comparison. For RPC Monitoring, the client should retain chain, method, block or transaction reference, provider response, and the final on-chain observation.

Useful measures include availability, block lag, RPC error rate, p95 latency, rate-limit events, and provider divergence. RPC Monitoring is closely connected to RPC Latency, RPC Error, and RPC Failover. Observability for RPC Monitoring should correlate request ID, provider, method, latency, error code, block reference, and transaction state.

The RPC Monitoring implementation should distinguish node acceptance, transaction broadcast, execution, confirmation, and indexed visibility where those stages apply. Provider failover for RPC Monitoring should not create a second transaction or replace a verified chain result with stale node data.

Testing RPC Monitoring should include provider disagreement, reorganization or indexing delay, malformed data, and an unavailable node when relevant to the method. An RPC Monitoring client should validate network identity, units, encoding, and method semantics before acting on provider data.