108 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
HTTP 206 Partial Content: what it means (range request served), what a client should do (assemble ranges), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Preci...
HTTP 207 Multi-Status: what it means (WebDAV: per-resource statuses in XML), what a client should do (parse each status), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and commo...
HTTP 208 Already Reported: what it means (WebDAV: binding already listed), what a client should do (skip), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Preci...
HTTP 226 IM Used: what it means (delta encoding applied), what a client should do (apply delta), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-cod...
HTTP 300 Multiple Choices: what it means (several representations), what a client should do (pick one), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise...
HTTP 301 Moved Permanently: what it means (permanent redirect; method may change to GET), what a client should do (update stored URL), the class it belongs to, whether it is retryable and idempotency-safe, the defining R...
HTTP 302 Found: what it means (temporary redirect; method may change to GET), what a client should do (follow, keep old URL), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and c...
HTTP 303 See Other: what it means (redirect to a GET result page), what a client should do (GET the Location), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. P...
HTTP 304 Not Modified: what it means (conditional request: cached copy is current), what a client should do (use cache), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common...
HTTP 307 Temporary Redirect: what it means (temporary; method and body preserved), what a client should do (resend same method), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, an...
HTTP 308 Permanent Redirect: what it means (permanent; method and body preserved), what a client should do (update URL, resend same method), the class it belongs to, whether it is retryable and idempotency-safe, the defi...
HTTP 400 Bad Request: what it means (malformed request), what a client should do (fix the request), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-...
HTTP 401 Unauthorized: what it means (authentication required or failed), what a client should do (authenticate (see WWW-Authenticate)), the class it belongs to, whether it is retryable and idempotency-safe, the defining...
HTTP 402 Payment Required: what it means (x402: pay to access (PAYMENT-REQUIRED header)), what a client should do (sign the payment and retry), the class it belongs to, whether it is retryable and idempotency-safe, the d...
HTTP 403 Forbidden: what it means (authenticated but not allowed), what a client should do (do not retry without new rights), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and c...
HTTP 404 Not Found: what it means (no such resource), what a client should do (check the URL), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-code...
HTTP 405 Method Not Allowed: what it means (method not supported here), what a client should do (see Allow header), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common caus...
HTTP 406 Not Acceptable: what it means (cannot satisfy Accept headers), what a client should do (relax Accept), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes....
HTTP 407 Proxy Authentication Required: what it means (authenticate to the proxy), what a client should do (send Proxy-Authorization), the class it belongs to, whether it is retryable and idempotency-safe, the defining R...
HTTP 408 Request Timeout: what it means (server gave up waiting), what a client should do (retry), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-c...
HTTP 409 Conflict: what it means (state conflict (e.g. edit collision)), what a client should do (refresh and retry), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common ca...
HTTP 410 Gone: what it means (permanently removed), what a client should do (delete references), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-cod...
HTTP 411 Length Required: what it means (Content-Length missing), what a client should do (add Content-Length), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes....
HTTP 412 Precondition Failed: what it means (If-* condition false), what a client should do (refresh ETag and retry), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common ca...