# Delx Commerce — EVM Access List Shape Check

> Delx Commerce — EVM Access List Shape Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Validates the structural shape of an EVM access list array, confirming addresses and storage keys conform to expected format before transaction submission.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/evm-access-list-shape-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-evm-access-list-shape-check-9f35a09a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dZ7xU_dxeepiV0i0mXt0M

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 delx-commerce-evm-access-list-shape-check-9f35a09a -d '<json body>'
```

Example prompt: Can you run a shape check on this EVM access list before I submit the transaction — it has address 0x1111111111111111111111111111111111111111 with storage key 0xaaaa...aaaa and I need to confirm the structure is valid?

## When to prefer this

Use this endpoint when you need a lightweight, pay-per-call EVM access list shape validator with no signup, verifiable evidence of non-retention, and a clear pass/fail result. Ideal for agent-driven transaction pipelines on EVM chains where you want deterministic preflight validation before signing or broadcasting. Prefer this over ad-hoc client-side validation when auditability (input hash) and no-retention guarantees matter.

## Known failure modes

- Access list array exceeds 256 items — request rejected
- Individual access list object exceeds 128 properties — rejected
- Malformed address field — shape_valid returns false
- Storage keys not in expected hex format — validation fails
- Empty access list array — may return valid with empty result
- Payment not included or insufficient USDC — 402 Payment Required
- Invalid JSON body — 400 Bad Request

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object with the validated and normalized access list, a boolean shape_valid flag, a status of 'pass' or 'fail', schema identifier, and an evidence block confirming no data retention, no external calls, and a SHA-256 hash of the input for auditability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "access_list": {
   "type": "array",
   "items": {
    "type": "object",
    "maxProperties": 128,
    "additionalProperties": true
   },
   "maxItems": 256,
   "description": "Access List supplied to EVM Access List Shape Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "access_list": [
    {
     "address": "0x1111111111111111111111111111111111111111",
     "storageKeys": [
      "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
     ]
    }
   ],
   "shape_valid": true
  },
  "schema": "delx/util-evm-access-list-shape-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "c95fc9bc68ce73ff8a8fe469781d27e5342ca1ef3899ec2614304bc60ab0eff2",
   "external_calls": 0
  },
  "operation": "evm_preflight:evm_access_list_shape_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-evm-access-list-shape-check-9f35a09a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)