# Delx EVM Approve Amount Check

> Delx EVM Approve Amount Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Validates whether a proposed EVM token approval amount falls within policy bounds defined by a maximum and satisfies a minimum required amount.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/evm-approve-amount-check
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-evm-approve-amount-check-49d5eb19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ojL-RxnmrtJJ7vWmgRPv0

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-evm-approve-amount-check-49d5eb19 -d '<json body>'
```

Example prompt: Before I submit this EVM token approval, can you check whether my proposed amount of 2000000 raw units is within policy — the maximum allowed is 2500000 and the minimum required is 1500000?

## When to prefer this

Use this endpoint when an AI agent needs a fast, auditable, in-memory preflight check on EVM token approval amounts before submitting an on-chain transaction — especially when you need a verifiable evidence trail (input hash, no retention) and want to enforce both a minimum required amount and a maximum policy cap in a single call. Prefer this over manual arithmetic when building automated DeFi workflows or governed agent pipelines that require traceable policy compliance.

## Known failure modes

- Missing required fields (maximum_raw, proposed_raw, or required_raw) may result in a validation error or incomplete check
- Non-numeric or malformed raw amount strings may cause parsing failures
- Amounts exceeding maxLength of 8192 characters will be rejected
- Network timeout or service unavailability returns a non-200 error

## How this service works

EVM Approve Amount Check: EVM Approve Amount Check compares a proposed approval with an explicit spending requirement and cap from bounded caller-supplied values without an external provider. Call EVM Approve Amount Check before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Approve Amount Check as versioned deterministi…

## Output

Returns a JSON object indicating whether the proposed raw approval amount is within policy (within_policy: true/false), echoes back the three input raw amounts, confirms no data was retained (retained: false), provides a SHA-256 hash of the input for auditability, and reports zero external calls were made during the computation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "maximum_raw": {
   "type": "string",
   "maxLength": 8192,
   "description": "Maximum Raw supplied to EVM Approve Amount Check; used only for this bounded calculation and processed in memory without retention."
  },
  "proposed_raw": {
   "type": "string",
   "maxLength": 8192,
   "description": "Proposed Raw supplied to EVM Approve Amount Check; used only for this bounded calculation and processed in memory without retention."
  },
  "required_raw": {
   "type": "string",
   "maxLength": 8192,
   "description": "Required Raw supplied to EVM Approve Amount Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "maximum_raw": "2500000",
   "proposed_raw": "2000000",
   "required_raw": "1500000",
   "within_policy": true
  },
  "schema": "delx/util-evm-approve-amount-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "d87188aade137780468510b8b6cae7f77c249050b34d6baed135fecab217f4c4",
   "external_calls": 0
  },
  "operation": "evm_preflight:evm_approve_amount_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-evm-approve-amount-check-49d5eb19/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)