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Dev Reference – CSP Header Explainer
x402
Dev Reference – CSP Header Explainer is a paid API for AI agents from dev-reference.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Parses a Content-Security-Policy header value, explains each directive in plain English, and flags risky settings like unsafe-inline with severity levels and fix suggestions.
Price / call$0.02
Success—
StatusUnknown
How this service works
Parse a Content-Security-Policy header value, explain each directive and flag risky settings like unsafe-inline.
Output
Returns a structured analysis including: a plain-English summary and overall verdict, a list of parsed directives each with its meaning and allowed sources, an array of risk flags with severity (high/medium/low/info), the problematic directive name, a human-readable message, and a suggested fix, plus counts of high/medium/low/info issues, total directive count, and a disclaimer about what was not checked.
Example use cases
Auditing a new site's CSP before launch
“Before we go live, can you analyze this Content-Security-Policy header and tell me if anything is dangerously permissive: "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; connect-src *"?”
Understanding a third-party app's security policy
“I copied this CSP header from the app we're integrating with — can you explain what each directive does and highlight anything that looks risky: "default-src 'none'; script-src cdn.example.com 'nonce-abc123'; style-src 'self' 'unsafe-inline'"?”
Debugging a broken CSP blocking resources
“Our site's Content-Security-Policy seems to be blocking some resources. Can you break down this header and explain what each part allows or restricts: "default-src 'self'; img-src 'self' data:; font-src fonts.gstatic.com; report-uri /csp-report"?”
Technical details
Endpoint
GEThttps://dev-reference.x402tookit.com/csp-explain?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a structured, machine-readable breakdown of a CSP header with severity-ranked risk flags and fix suggestions — ideal for automated security audits, developer tooling pipelines, or agent workflows that need to explain CSP policy to non-experts. Prefer it over generic LLM interpretation when you need consistent structured output with directive-level granularity and actionable remediation advice.
Side effects
- Missing or empty 'value' query parameter returns an error
- Malformed or non-CSP string may produce partial or degraded results (degraded: true in response)
- Extremely long or complex CSP strings may hit processing limits
- Unknown or experimental directives may appear in notChecked array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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