# ChainRead Multicall – Batch EVM Read

> ChainRead Multicall – Batch EVM Read is a paid API for AI agents from chainread.genexxis.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-30).

Executes up to 20 read-only smart contract calls in a single Multicall3 request across Ethereum, Base, Arbitrum, Optimism, Polygon, and BNB Chain, returning decoded results in one response.

## Facts

- Endpoint: POST https://chainread.genexxis.com/multicall?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainread-multicall-batch-evm-read-6e791c90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rpSAgN2-uXWXLReWVWEa6

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 chainread-multicall-batch-evm-read-6e791c90 -d '<json body>'
```

Example prompt: Can you batch-read the symbol, decimals, and totalSupply of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base in one multicall?

## When to prefer this

Use this endpoint when you need to read multiple smart contract values from the same chain in a single network round-trip, reducing latency and cost compared to sequential /read-contract calls. Ideal for dashboards, portfolio aggregators, or any agent workflow that needs to fan out across several contract functions or addresses at once. Prefer /read-contract for a single call, and /token or /resolve for specialized token-info or ENS lookups.

## Known failure modes

- HTTP 422 with decoded revert reason if any individual call reverts on-chain
- Invalid function signature format causes parsing error
- Unsupported chain name returns error
- More than 20 calls in the batch rejected
- RPC node unavailable causes timeout or 5xx error
- Invalid contract address (non-checksummed or wrong length) returns error

## How this service works

Up to 20 contract reads on one chain in a single Multicall3 request; each call returns success, decoded result and raw hex, or its revert reason.

## Output

A JSON object containing: timestamp (asOf), chain name, chainId, blockNumber, blockTag, count of calls, succeeded count, and a results array. Each result item includes: index, contract address, function signature, args, success flag, and decoded result value (uint256 as string, address as string, etc.). Failed calls include an error reason rather than a result.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "calls": {
   "type": "array",
   "description": "Up to 20 items {address, function, args?}"
  },
  "chain": {
   "type": "string",
   "description": "ethereum (default), base, arbitrum, optimism, polygon, bsc"
  },
  "blockTag": {
   "type": "string",
   "description": "latest (default) or a block number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asOf": "2026-10-25T03:50:00.000Z",
  "chain": "base",
  "count": 3,
  "chainId": 8453,
  "results": [
   {
    "args": [],
    "index": 0,
    "result": "USDC",
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "success": true,
    "function": "symbol() returns (string)"
   },
   {
    "args": [],
    "index": 1,
    "result": 6,
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "success": true,
    "function": "decimals() returns (uint8)"
   },
   {
    "args": [],
    "index": 2,
    "result": "4114170396312345",
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "success": true,
    "function": "totalSupply() returns (uint256)"
   }
  ],
  "blockTag": "latest",
  "succeeded": 3,
  "blockNumber": "37412345"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainread-multicall-batch-evm-read-6e791c90/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chainread.genexxis.com](https://www.zero.xyz/host/chainread.genexxis.com/llms.txt)