feat(rpc): add NOWNodes to ethereum-rpc and bnb-rpc

benchmarks/bnb-rpc.yml

@@ -86,6 +86,29 @@ providers:
           p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="publicnode", chain="bnb", region="sgp"})
           series: avg_over_time(rpc_latency_milliseconds{provider="publicnode", chain="bnb", region="sgp"}[1h])
 
+  - slug: nownodes
+    name: NOWNodes
+    tag: Public node, 110+ chains, 5 RPS free tier
+    formula: "50th percentile over 24h of client-side round-trip latency (ms) for a single `eth_getBlockByNumber` POST sent every 60s from 3 regions (us-east + eu-west + sgp) to NOWNodes public no-key BNB Chain endpoint."
+    queries:
+      p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="bnb"})
+      p90: avg(ocb:rpc_latency_milliseconds:p90_24h{provider="nownodes", chain="bnb"})
+      p99: avg(ocb:rpc_latency_milliseconds:p99_24h{provider="nownodes", chain="bnb"})
+      mean: avg(ocb:rpc_latency_milliseconds:mean_24h{provider="nownodes", chain="bnb"})
+      success: sum(ocb:rpc_call:ok_rate_24h{provider="nownodes", chain="bnb"}) / sum(ocb:rpc_call:rate_24h{provider="nownodes", chain="bnb"})
+      sample_size: sum(ocb:rpc_call:increase_24h{provider="nownodes", chain="bnb"})
+      series: avg(avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="bnb"}[1h]))
+      regions:
+        - region: us-east
+          p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="bnb", region="us-east"})
+          series: avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="bnb", region="us-east"}[1h])
+        - region: eu-west
+          p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="bnb", region="eu-west"})
+          series: avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="bnb", region="eu-west"}[1h])
+        - region: ap-southeast
+          p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="bnb", region="sgp"})
+          series: avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="bnb", region="sgp"}[1h])
+
   - slug: drpc
     name: dRPC
     tag: Decentralized RPC mesh, consensus-checked

benchmarks/ethereum-rpc.yml

@@ -87,6 +87,29 @@ providers:
           p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="publicnode", chain="ethereum", region="sgp"})
           series: avg_over_time(rpc_latency_milliseconds{provider="publicnode", chain="ethereum", region="sgp"}[1h])
 
+  - slug: nownodes
+    name: NOWNodes
+    tag: Public node, 110+ chains, 5 RPS free tier
+    formula: "50th percentile over 24h of client-side round-trip latency (ms) for a single `eth_getBlockByNumber` POST sent every 60s from 3 regions (us-east + eu-west + sgp) to NOWNodes public no-key Ethereum endpoint."
+    queries:
+      p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="ethereum"})
+      p90: avg(ocb:rpc_latency_milliseconds:p90_24h{provider="nownodes", chain="ethereum"})
+      p99: avg(ocb:rpc_latency_milliseconds:p99_24h{provider="nownodes", chain="ethereum"})
+      mean: avg(ocb:rpc_latency_milliseconds:mean_24h{provider="nownodes", chain="ethereum"})
+      success: sum(ocb:rpc_call:ok_rate_24h{provider="nownodes", chain="ethereum"}) / sum(ocb:rpc_call:rate_24h{provider="nownodes", chain="ethereum"})
+      sample_size: sum(ocb:rpc_call:increase_24h{provider="nownodes", chain="ethereum"})
+      series: avg(avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="ethereum"}[1h]))
+      regions:
+        - region: us-east
+          p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="ethereum", region="us-east"})
+          series: avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="ethereum", region="us-east"}[1h])
+        - region: eu-west
+          p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="ethereum", region="eu-west"})
+          series: avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="ethereum", region="eu-west"}[1h])
+        - region: ap-southeast
+          p50: avg(ocb:rpc_latency_milliseconds:p50_24h{provider="nownodes", chain="ethereum", region="sgp"})
+          series: avg_over_time(rpc_latency_milliseconds{provider="nownodes", chain="ethereum", region="sgp"}[1h])
+
   - slug: drpc
     name: dRPC
     tag: Decentralized RPC mesh, consensus-checked

harnesses/rpc-capabilities/cmd/script/config.go

@@ -237,7 +237,7 @@ func chains() []Chain {
 				{Slug: "tenderly", Name: "Tenderly Gateway", URL: envDefault("RPC_URL_MEGAETH_TENDERLY", "https://megaeth.gateway.tenderly.co")},
 			},
 		},
-		// ─── Ethereum mainnet (8 providers) ────────────────────────
+		// ─── Ethereum mainnet (9 providers) ────────────────────────
 		{
 			Slug: "ethereum",
 			Name: "Ethereum",
@@ -250,6 +250,7 @@ func chains() []Chain {
 				{Slug: "nodies", Name: "Nodies (POKT)", URL: envDefault("RPC_URL_ETHEREUM_NODIES", "https://eth-pokt.nodies.app")},
 				{Slug: "lava", Name: "Lava Network", URL: envDefault("RPC_URL_ETHEREUM_LAVA", "https://eth1.lava.build")},
 				{Slug: "bloxroute", Name: "bloXroute", URL: envDefault("RPC_URL_ETHEREUM_BLOXROUTE", "https://eth.rpc.blxrbdn.com")},
+				{Slug: "nownodes", Name: "NOWNodes", URL: envDefault("RPC_URL_ETHEREUM_NOWNODES", "https://public-eth.nownodes.io")},
 			},
 		},
 		// ─── Polygon PoS (5 providers) ──────────────────────────────
@@ -304,7 +305,7 @@ func chains() []Chain {
 				{Slug: "bloxroute", Name: "bloXroute", URL: envDefault("RPC_URL_BASE_BLOXROUTE", "https://base.rpc.blxrbdn.com")},
 			},
 		},
-		// ─── BNB Chain (5 providers) ────────────────────────────────
+		// ─── BNB Chain (7 providers) ────────────────────────────────
 		{
 			Slug: "bnb",
 			Name: "BNB Chain",
@@ -315,6 +316,7 @@ func chains() []Chain {
 				{Slug: "binance", Name: "Binance Official", URL: envDefault("RPC_URL_BNB_OFFICIAL", "https://bsc-dataseed1.binance.org")},
 				{Slug: "blastapi", Name: "Blast API", URL: envDefault("RPC_URL_BNB_BLASTAPI", "https://bsc-mainnet.public.blastapi.io")},
 				{Slug: "bloxroute", Name: "bloXroute", URL: envDefault("RPC_URL_BNB_BLOXROUTE", "https://bsc.rpc.blxrbdn.com")},
+				{Slug: "nownodes", Name: "NOWNodes", URL: envDefault("RPC_URL_BNB_NOWNODES", "https://public-bsc.nownodes.io")},
 			},
 		},
 		// ─── Avalanche C-Chain (6 providers) ────────────────────────

src/data/provider-registry.ts

@@ -2311,8 +2311,19 @@ export const PROVIDER_REGISTRY: Record<string, ProviderRegistryEntry> = {
   nownodes: {
     url: "https://nownodes.io",
     description:
-      "NOWNodes is a multi-chain node provider covering Gram (TON), Bitcoin, Ethereum and 50+ other chains. Offers API-key-based access with a free trial tier.",
+      "Multi-chain node provider covering 110+ blockchains. Key-based REST and WebSocket RPC plus block explorers, with keyless public endpoints on a handful of chains (Ethereum, BNB, Bitcoin) rate-limited to 5 requests per second.",
     twitter: "@NOWNodes_io",
+    docs: "https://docs.nownodes.io",
+    chains: ["ethereum", "bnb", "bitcoin", "litecoin", "dogecoin", "gram", "xrp", "tron"],
+    features: [
+      "110+ chains via a single API key",
+      "REST and WebSocket JSON-RPC endpoints",
+      "Block explorers for major UTXO chains",
+      "Keyless public endpoints on Ethereum, BNB and Bitcoin (5 RPS)",
+      "Free trial tier, then usage-based paid plans",
+    ],
+    pricing:
+      "Free trial key, then paid plans by request volume. Public no-key endpoints exist on select chains at 5 requests per second.",
   },
   tatum: {
     url: "https://tatum.io",