# Saylor Innovations EVM Contract Introspection (Base)

> Saylor Innovations EVM Contract Introspection (Base) 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).

Fetches on-chain smart contract data for a given contract address on the Base EVM network

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/base/contract/: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-evm-contract-introspection-base-1276ca2b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qc5dZW5CRXB228eMFhiAL

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-evm-contract-introspection-base-1276ca2b
```

Example prompt: Can you pull up the on-chain contract details for the Base network address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know what kind of contract it is and see its metadata?

## When to prefer this

Use this endpoint when you specifically need to introspect smart contracts deployed on the Base EVM network (Coinbase's L2). Prefer this over generic blockchain explorers when you want structured, programmatic contract data in an API response without scraping. It is particularly useful for agents that need to verify contract legitimacy, extract ABI, or check deployment details as part of an automated workflow.

## Known failure modes

- Invalid or malformed contract address returns a 400 error
- Address exists but is an EOA (not a contract) — may return empty bytecode or an error
- Contract not deployed on Base network — returns 404 or empty result
- Network congestion or RPC timeout causes delayed or failed response
- Rate limiting if called excessively without payment credentials

## How this service works

EVM Contract Introspection (base). Base contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 implementation/admin/beacon and legacy OpenZeppelin slots) and ERC-20 name, symbol, decimals and total supply.

## Output

Returns on-chain contract data for the specified Base network address, including contract bytecode, ABI, deployment metadata, and potentially contract type or interface details extracted from the chain.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-evm-contract-introspection-base-1276ca2b/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)