Delx Commerce — Age Header Validate

x402

Delx Commerce — Age Header Validate 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 an HTTP Age header value against a maximum age threshold to determine if cached content is still within its freshness window

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

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 parsed age in seconds, a boolean indicating whether the content is within the freshness window, a status field ('pass' or 'fail'), and an evidence object confirming no data retention and zero external calls — suitable for verifiable, auditable cache validation.

Example use cases

CDN cache freshness check

“I have an HTTP response with an Age header of '450' — can you verify whether it's still within a 600-second freshness window?”

Proxy response staleness detection

“My proxy returned an Age header of '900' seconds. Check if that's within a max age of 300 seconds and tell me if the content is stale.”

Web agent cache validation pipeline

“Before I serve this cached page, verify the Age header value '85' is within the allowed max age of 120 seconds.”

Technical details

Endpoint

POSThttps://commerce.delx.ai/api/v1/x402/age-header-validate?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a lightweight, pay-per-call, auditable HTTP Age header freshness check with verifiable evidence of no data retention and no external calls — ideal for AI agents that need to validate cache freshness within a web reliability pipeline without setting up dedicated infrastructure.

Side effects

Invalid or non-numeric Age header string may cause parsing errors
Missing required fields (age or max_age_seconds) may result in a 400 error
Age value exceeding string length limits (8192 chars) will be rejected
Non-integer max_age_seconds will fail schema validation

Input

Schema · Request body

Field	Type	Description
age	string	Age supplied to Age Header Validate; used only for this bounded calculation and processed in memory without retention.
max_age_seconds	integer	Max Age Seconds supplied to Age Header Validate; used only for this bounded calculation and processed in memory without retention.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "result": {
      "age_seconds": 120,
      "within_freshness": true
    },
    "schema": "delx/util-age-header-validate/v1",
    "status": "pass",
    "evidence": {
      "retained": false,
      "input_sha256": "f51799fd712f3514d51db5985cf250b2e699f3081571f017224fd7838e380cc7",
      "external_calls": 0
    },
    "operation": "web_reliability:age_header_validate"
  }
}

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