---
title: "Base contract read"
method: POST
path: "/v1/crypto/base-contract-read"
tags: ["crypto"]
---

# Base contract read

`POST /v1/crypto/base-contract-read`

## Request

- Base URL: `https://apiacre.com`
- URL: `https://apiacre.com/v1/crypto/base-contract-read`
- Auth: none required

Execute one bounded read-only eth_call against a resolved Base mainnet block, retain call and block evidence, and optionally decode caller-specified ABI output types.

Price: **$0.005 USDC** via x402 exact payment on Base and Solana.

## Request body

- BaseContractReadInput
  - `contract` string, required: The 20-byte Base mainnet contract address to read
  - `call_data` string, required: ABI-encoded eth_call data, including the function selector
  - `block_tag` 'latest' | 'safe' | 'finalized': Base block tag resolved once before executing the read
  - `from_address` string, nullable: Optional msg.sender context; no private key or transaction is used
  - `gas_limit` integer: Bounded execution allowance for the read-only call
  - `output_types` string[]: Optional primitive ABI output types used to decode a successful result; arrays and tuples are intentionally excluded

## Response `200`

Successful Response

- ServiceResponse
  - `request_id` string, required
  - `service` string, required
  - `version` string
  - `data` object, required
  - `meta` ServiceMeta, required
    - `duration_ms` integer, required
    - `cached` boolean
    - `sources` string[]
    - `warnings` string[]
    - `next_actions` ServiceNextAction[]
      - `service` string, required
      - `title` string, required
      - `reason` string, required
      - `method` 'POST'
      - `path` string, required
      - `price` string, required
      - `input_template` object, required
      - `use_output` string, required
      - `handoff_path` string, required
      - `checkout_path` string, required
      - `sample_path` string, nullable, required
      - `maximum_atomic_usdc` string, required
      - `handoff_payment_required` false
      - `executes_automatically` false
      - `authorization_required` boolean

## Other responses

- `402`: Payment Required. Decode PAYMENT-REQUIRED, satisfy the x402 requirement, and retry with PAYMENT-SIGNATURE.
- `422`: Validation Error

---

[API](https://skmtc.dev/apiacre/apis/api-acre.md) · [All operations](https://skmtc.dev/apiacre/apis/api-acre/llms.txt) · [OpenAPI document](https://skmtc.dev/apiacre/apis/api-acre/revisions/0ba942b920ad?raw)