Developer reference lookups for agents: HTTP status codes, headers, CSP and Cache-Control explainers, MIME types, ports, DNS record types, ISO 8601 and Unicode.
payments ON MAINNET (real money) · 12 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /cache-control-explain | $0.02 | Parse a Cache-Control value, explain each directive, compute freshness and flag conflicts or leaks. |
GET /csp-explain | $0.02 | Parse a Content-Security-Policy header value, explain each directive and flag risky settings like unsafe-inline. |
GET /datetime-convert | $0.02 | Convert a timestamp (RFC 3339, ISO 8601, HTTP-date or epoch seconds) to RFC 3339, HTTP-date, RFC 5322, basic ISO and epoch. |
GET /datetime-validate | $0.02 | Validate an ISO 8601 or RFC 3339 date, time, timestamp, duration or interval, and say which standard it satisfies. |
GET /dns-record-type | $0.02 | DNS record type lookup by name (MX) or number (15): IANA meaning, RFC reference and typical use. |
GET /http-header | $0.02 | Explain an HTTP header: request or response, purpose, security notes, and its IANA registration status. |
GET /http-method | $0.02 | Whether an HTTP method is safe and idempotent (IANA registry), what it is for, and request-body semantics. |
GET /http-status-class | $0.02 | All registered HTTP status codes in a class (1xx to 5xx) with names and one-line meanings. |
GET /http-status | $0.02 | HTTP status code meaning, typical cause, client action and cacheability, from the IANA registry and RFC 9110. |
GET /mime-type | $0.02 | Media type (MIME) for a file extension, or extensions for a media type, with IANA registration status. |
GET /port-lookup | $0.02 | IANA service name and common use for a TCP/UDP port (about 130 well-known ports), plus the port range class. |
GET /unicode-char | $0.02 | Unicode character lookup by code point or character: name, block, category, UTF-8/UTF-16 bytes and HTML/JS/CSS escapes. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Reference data is embedded from the IANA registries (retrieved 2026-10-11) and Unicode data files plus curated explanations, provided as is, with no warranty. Header explainers flag common risks only and are not a security audit. Verify against the current standards before relying on a value. Every paid response carries a disclaimer field.