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X-Content-Type-Options Header Check
x402
X-Content-Type-Options Header Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Validates whether an HTTP response's X-Content-Type-Options header is exactly 'nosniff', returning a deterministic pass/advisory finding as versioned JSON.
Price / call$0.001
Success—
StatusUnknown
How this service works
X Content Type Options Check: X Content Type Options Check checks whether X-Content-Type-Options is exactly nosniff from bounded caller-supplied values without an external provider. Call X Content Type Options Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for X Content Type Options Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. F…
Output
Returns a versioned deterministic JSON object containing: the normalized input header evidence, a computed finding describing whether the value matches exactly 'nosniff', and an explicit pass or advisory status indicating compliance with X-Content-Type-Options security requirements.
Example use cases
Security header audit before caching
“Before I cache this web response, check if its X-Content-Type-Options header value 'nosniff' passes the required security check.”
Validate headers in agent web pipeline
“My agent just fetched a web page and got this X-Content-Type-Options header value: 'text/html'. Does it pass the nosniff check?”
Pre-redirect security compliance check
“I'm about to redirect users through this response — can you verify the X-Content-Type-Options header value 'NOSNIFF' actually meets the nosniff requirement?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x-content-type-options-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automated pipeline needs a deterministic, auditable, versioned record of whether an HTTP response's X-Content-Type-Options header is correctly set before taking actions such as caching, redirecting, retrying, or accepting the response. Prefer this over custom logic when you need consistent normalized evidence and explicit pass/advisory classification without writing your own header parsing.
Side effects
- Empty or missing value field returns advisory/fail status
- Header value with incorrect casing (e.g. 'Nosniff') may trigger advisory depending on normalization
- Value exceeding 8192 characters may be rejected
- Malformed JSON input returns validation error
- Any value other than exact 'nosniff' results in advisory finding
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | string | Value supplied to X Content Type Options Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"value": "nosniff",
"accepted": true
},
"schema": "delx/util-x-content-type-options-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "bea2556c6cc6e1b92f986ac1504063041a0fbd184228061905e268ef7eeebd31",
"external_calls": 0
},
"operation": "web_reliability:x_content_type_options_check"
}
}Tags
x402
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