# Saylor Innovations On-Chain Lookups — Ethereum eth_call

> Saylor Innovations On-Chain Lookups — Ethereum eth_call is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-03).

Executes a read-only smart contract call (eth_call) on Ethereum mainnet given a contract address and ABI-encoded calldata, returning the decoded result or revert status.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/ethereum/call/:address?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-on-chain-lookups-ethereum-eth-call-b9585b5f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Jl-zXx9_5swMw0K1prYdc

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 saylor-innovations-on-chain-lookups-ethereum-eth-call-b9585b5f
```

Example prompt: Call the ERC-20 balanceOf function on the USDC contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum mainnet — the calldata should be ABI-encoded for my wallet address 0x1234...abcd.

## When to prefer this

Choose this endpoint when you need to read state from a specific Ethereum mainnet smart contract using a view or pure function without sending a transaction. Ideal for fetching token balances, reading DeFi protocol parameters, checking NFT ownership, or any stateless eth_call. Prefer it over general-purpose RPC providers when you need a simple HTTP GET interface with per-call micropayment pricing and no API key setup.

## Known failure modes

- Contract call reverts — reverted: true with error message describing the revert reason
- Invalid or malformed ABI-encoded calldata — likely returns error or unexpected result
- Contract address does not exist on Ethereum mainnet — may return empty result or error
- Malformed address in URL path — 400-level error or error field populated
- Network or RPC timeout — upstream Ethereum node unavailability

## How this service works

Read-Only Contract Call (eth_call) (ethereum). Ethereum read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.

## Output

Returns a JSON object with the chain name, contract address, the raw hex result of the call (or null), a boolean indicating if the call reverted, and an optional error string if something went wrong.

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "data": {
       "type": "string",
       "description": "0x ABI-encoded calldata (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "chain",
      "contract",
      "reverted"
     ],
     "properties": {
      "chain": {
       "type": "string"
      },
      "error": {
       "type": [
        "string",
        "null"
       ]
      },
      "result": {
       "type": [
        "string",
        "null"
       ]
      },
      "contract": {
       "type": "string"
      },
      "reverted": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-on-chain-lookups-ethereum-eth-call-b9585b5f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)