# Delx Commerce DNS TTL Budget Check

> Delx Commerce DNS TTL Budget 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 whether a set of DNS TTL values fall within a specified minimum/maximum budget policy, returning pass/fail status and out-of-policy entries.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/dns-ttl-budget-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-dns-ttl-budget-check-424f2245
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zZEOlIxXDSx9ydlR46sqM

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-dns-ttl-budget-check-424f2245 -d '<json body>'
```

Example prompt: Check if my DNS TTL values [60, 300, 7200, 3600] are all within the policy range of minimum 60 and maximum 3600 — flag any that are out of budget.

## When to prefer this

Use this endpoint when you need a lightweight, verifiable, pay-per-use check of DNS TTL compliance against policy bounds with no signup or persistent data storage. Ideal for autonomous agents that need cryptographic evidence of result integrity (SHA-256 input hash, zero external calls) rather than a self-hosted validation script.

## Known failure modes

- Missing required fields (ttls array not provided) — likely 400 error
- TTL array exceeds 256 items — rejected due to maxItems constraint
- Non-integer values in TTL array — schema validation failure
- Payment failure via x402 — 402 response requiring USDC payment on Base or Solana

## 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 a pass/fail status, a list of out-of-policy TTL values, the maximum and minimum TTL observed across the input array, and evidence metadata including a SHA-256 hash of the input and confirmation that no data is retained and no external calls were made.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ttls": {
   "type": "array",
   "items": {
    "type": "integer"
   },
   "maxItems": 256,
   "description": "Ttls supplied to DNS Ttl Budget Check; used only for this bounded calculation and processed in memory without retention."
  },
  "maximum": {
   "type": "integer",
   "description": "Maximum supplied to DNS Ttl Budget Check; used only for this bounded calculation and processed in memory without retention."
  },
  "minimum": {
   "type": "integer",
   "description": "Minimum supplied to DNS Ttl Budget Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "out_of_policy": [],
   "maximum_observed": 3600,
   "minimum_observed": 60
  },
  "schema": "delx/util-dns-ttl-budget-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "ed4c60560d35497590dde05bca8a1d9acb1250db64bb2fe5d78a8934449b6ff1",
   "external_calls": 0
  },
  "operation": "web_reliability:dns_ttl_budget_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-dns-ttl-budget-check-424f2245/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)