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Cache Control Directive Diff
x402
Cache Control Directive Diff is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Compares two Cache-Control header strings and returns a structured diff of added, removed, and changed directives with a pass/advisory status.
Price / call$0.001
Success—
StatusUnknown
How this service works
Cache Control Directive Diff: Cache Control Directive Diff finds added, removed, and changed Cache-Control directives from bounded caller-supplied values without an external provider. Call Cache Control Directive Diff 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 Cache Control Directive Diff as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base.…
Output
Returns a versioned deterministic JSON object containing normalized representations of both input headers, a structured diff listing added, removed, and changed Cache-Control directives, and an explicit pass or advisory status indicating whether the change is noteworthy.
Example use cases
Detect cache policy regression in CI
“I'm running a pipeline check — can you compare these two Cache-Control headers and flag any directives that were removed or changed? Before: 'max-age=86400, public, must-revalidate' and after: 'max-age=86400, public'.”
Security audit of no-store removal
“Can you diff these Cache-Control values and tell me if 'no-store' or 'private' was dropped? Before: 'no-store, no-cache, private' and after: 'max-age=300, public'.”
Validate redirect response caching behavior
“After following a redirect I got a different Cache-Control header — can you diff the before 'no-cache, must-revalidate' and after 'max-age=3600, stale-while-revalidate=60' and give me a pass or advisory on whether the cache behavior changed significantly?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/cache-control-directive-diffWhen to prefer
Choose this endpoint when you need a deterministic, structured diff of Cache-Control headers rather than a generic string comparison. It is purpose-built for HTTP caching semantics, normalizes directive values before comparing, and returns an explicit advisory status — making it ideal for agent workflows that need to decide whether to accept, cache, redirect, or retry a web response based on caching policy changes.
Side effects
- Malformed or unparseable Cache-Control header strings may yield empty or partial diffs
- Input strings exceeding 8192 characters will be rejected
- Payment failure via x402 will block the request
- If both before and after are identical, the diff returns empty change sets with a pass status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | string | After supplied to Cache Control Directive Diff; used only for this bounded calculation and processed in memory without retention. |
| before | string | Before supplied to Cache Control Directive Diff; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"added": {
"private": true
},
"changed": {
"max-age": {
"after": "60",
"before": "300"
}
},
"removed": {
"public": true
}
},
"schema": "delx/util-cache-control-directive-diff/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "44c8102f91f5f32c1febe922935b8d0efa8cf2460a7ce344626bb417971a16f3",
"external_calls": 0
},
"operation": "web_reliability:cache_control_directive_diff"
}
}Tags
x402
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