# EVM Chain Block Info & Congestion Rating

> EVM Chain Block Info & Congestion Rating is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).

Returns the latest block data for 7 EVM chains including gas utilization, a congestion rating (low/moderate/high), and block age to help agents assess chain liveness and network busyness before submitting a transaction.

## Facts

- Endpoint: GET https://api.x402node.dev/chain/block-info
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-chain-block-info-congestion-rating-fe1542ea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cFebauWK69nw8m1PffuMh

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability evm-chain-block-info-congestion-rating-fe1542ea
```

Example prompt: Before I send this transaction, can you check how congested Ethereum mainnet is right now — give me the latest block info, gas utilization, and whether the network is low, moderate, or high congestion?

## When to prefer this

Use this endpoint when an AI agent needs to check EVM chain health, gas congestion, or block liveness before deciding whether to submit a transaction or advise a user on timing. Prefer this over generic block explorers when you need a structured, machine-readable congestion rating across multiple chains in a single call.

## Known failure modes

- Unsupported chain identifier returns a 400 or 404 error
- Node data may lag briefly behind true chain head, causing slight staleness in block age
- Payment failure (402) if USDC balance is insufficient
- Network timeout if the underlying node RPC is slow or unreachable

## How this service works

Latest block on 7 EVM chains with gas utilization and a congestion rating (low/moderate/high) plus block age - lets agents check chain liveness and whether the network is busy before submitting a transaction, real-time data. block info, latest block, chain congestion, network busy, block height, gas utilization Accepts payment on Base or Solana — either network works.

## Output

Returns the latest block number, timestamp, block age, transaction count, gas utilization percentage, and a human-readable congestion rating (low/moderate/high) for up to 7 EVM chains, enabling pre-flight network checks before transaction submission.

## Example request

```json
{
 "chain": "ethereum"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "chain": {
       "type": "string",
       "description": "ethereum, base (default), arbitrum, optimism, polygon, bsc, avalanche"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-chain-block-info-congestion-rating-fe1542ea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)