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 413 Content Too Large: what it means (body exceeds limit), what a client should do (shrink or chunk), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Preci...
HTTP 414 URI Too Long: what it means (URL exceeds limit), what a client should do (use POST), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-code r...
HTTP 415 Unsupported Media Type: what it means (Content-Type not accepted), what a client should do (change the encoding), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and comm...
HTTP 416 Range Not Satisfiable: what it means (range outside the resource), what a client should do (fix Range), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes....
HTTP 417 Expectation Failed: what it means (Expect header not met), what a client should do (drop Expect), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Preci...
HTTP 418 I'm a teapot: what it means (April-fools RFC; used to reject bots), what a client should do (stop), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Pre...
HTTP 421 Misdirected Request: what it means (wrong server/connection), what a client should do (reconnect), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Prec...
HTTP 422 Unprocessable Content: what it means (well-formed but semantically invalid), what a client should do (fix the fields), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and...
HTTP 423 Locked: what it means (WebDAV: resource locked), what a client should do (wait/unlock), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-cod...
HTTP 424 Failed Dependency: what it means (WebDAV: earlier action failed), what a client should do (fix dependency), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common cau...
HTTP 425 Too Early: what it means (replay risk with 0-RTT), what a client should do (retry later), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-c...
HTTP 426 Upgrade Required: what it means (switch protocol (see Upgrade)), what a client should do (upgrade), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Pre...
HTTP 428 Precondition Required: what it means (conditional headers required), what a client should do (add If-Match), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common ca...
HTTP 429 Too Many Requests: what it means (rate limited), what a client should do (wait Retry-After, then retry), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes...
HTTP 431 Request Header Fields Too Large: what it means (headers too big), what a client should do (shrink cookies/headers), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and co...
HTTP 451 Unavailable For Legal Reasons: what it means (blocked by law/takedown), what a client should do (do not retry), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common...
HTTP 500 Internal Server Error: what it means (server bug), what a client should do (retry with backoff), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precis...
HTTP 501 Not Implemented: what it means (method unsupported by server), what a client should do (do not retry), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes....
HTTP 502 Bad Gateway: what it means (upstream failed), what a client should do (retry with backoff), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one...
HTTP 503 Service Unavailable: what it means (overloaded or down for maintenance), what a client should do (wait Retry-After), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and c...
HTTP 504 Gateway Timeout: what it means (upstream timed out), what a client should do (retry with backoff), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Prec...
HTTP 505 HTTP Version Not Supported: what it means (protocol version rejected), what a client should do (downgrade), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common cau...
HTTP 506 Variant Also Negotiates: what it means (negotiation misconfigured), what a client should do (report), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. P...
HTTP 507 Insufficient Storage: what it means (WebDAV: out of space), what a client should do (free space), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Preci...