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HTTP Header Diff
x402
HTTP Header 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 HTTP header maps case-insensitively, redacting sensitive values, and returns a structured diff of added, removed, and changed headers.
Price / call$0.001
Success—
StatusUnknown
How this service works
Compare two caller-supplied HTTP header maps case-insensitively while redacting Authorization, Cookie, Set-Cookie, and Proxy-Authorization values. Use after header or TLS inspection to identify configuration drift and security-sensitive changes. Returns bounded deterministic JSON for 0.001 USDC via x402 on Base; no URL fetch or retention.
Output
A bounded deterministic JSON object listing headers that were added, removed, or modified between the before and after maps, with values for Authorization, Cookie, Set-Cookie, and Proxy-Authorization replaced by redacted placeholders. The result is case-insensitive and contains no fetched or retained data.
Example use cases
Detect deployment-induced header drift
“After our latest deployment, I want to know what HTTP headers changed — here's the before snapshot with 'Content-Type: application/json', 'Cache-Control: no-store', and 'X-Request-Id: old-id', and the after snapshot with 'Content-Type: application/json', 'Cache-Control: public', and 'X-New-Header: added'. What's different?”
Audit security header changes after TLS reconfiguration
“We just updated our TLS config and I need to audit the header changes. Before we had 'Strict-Transport-Security: max-age=3600' and 'Set-Cookie: session=secret; Secure', after we have 'Strict-Transport-Security: max-age=31536000' and 'Set-Cookie: session=newsecret; Secure; HttpOnly'. Show me the diff with sensitive cookie values redacted.”
Catch unexpected proxy header modifications
“I'm seeing weird behavior in our proxy layer and want to check if headers are being modified. The original request headers include 'Proxy-Authorization: Basic xyz', 'Accept: application/json', and 'X-Forwarded-For: 10.0.0.1', and after the proxy they're 'Accept: text/html', 'X-Forwarded-For: 10.0.0.1', and 'Via: 1.1 proxy'. What was added, removed, or changed, with auth values redacted?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/http-header-diffWhen to prefer
Choose this endpoint when you need a fast, deterministic, security-aware diff of two HTTP header snapshots without fetching any URLs or retaining data. It is ideal for detecting configuration drift post-deployment, auditing header changes after TLS or proxy reconfiguration, or any workflow where sensitive header values must be automatically redacted before logging or reporting. Prefer it over general-purpose diff tools when HTTP-specific case-insensitive comparison and built-in redaction of auth and cookie headers are required.
Side effects
- Input exceeds 200 properties per header map — request rejected
- Malformed JSON body — returns parse error
- Missing both before and after fields — returns validation error
- Payment not provided or insufficient — x402 payment required response
- Header values that are not strings may cause type errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | object | |
| before | object |
Output
Schema · Response
{
"type": "json",
"example": {
"added": [],
"schema": "delx/util-http-header-diff/v1",
"changed": [
{
"name": "strict-transport-security",
"after": "max-age=31536000",
"before": "max-age=60"
}
],
"removed": [],
"unchanged_count": 1,
"credential_values_redacted": true,
"security_sensitive_changes": [
"strict-transport-security"
]
}
}Tags
x402
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