| Successful  Client Requests |
||
| 200 | OK | |
| 201 | Created | |
| 202 | Accepted | |
| 203 | Non-Authorative Information | |
| 204 | No Content | |
| 205 | Reset Content | |
| 206 | Partial Content | |
| Client  Request Redirected |
||
| 300 | Multiple Choices | |
| 301 | Moved Permanently | |
| 302 | Moved Temporarily | |
| 303 | See Other | |
| 304 | Not Modified | |
| 305 | Use Proxy | |
| Client  Request Errors |
||
| 400 | Bad Request | |
| 401 | Authorization Required | |
| 402 | Payment Required (not used yet) | |
| 403 | Forbidden | |
| 404 | Not Found | |
| 405 | Method Not Allowed | |
| 406 | Not Acceptable (encoding) | |
| 407 | Proxy Authentication Required | Â |
| 408 | Request Timed Out | |
| 409 | Conflicting Request | |
| 410 | Gone | |
| 411 | Content Length Required | |
| 412 | Precondition Failed | |
| 413 | Request Entity Too Long | |
| 414 | Request URI Too Long | |
| 415 | Unsupported Media Type | |
| Server  Errors |
||
| 500 | Internal Server Error | |
| 501 | Not Implemented | |
| 502 | Bad Gateway | Â |
| 503 | Service Unavailable | Â |
| 504 | Gateway Timeout | Â |
| 505 | HTTP Version Not Supported | Â |
Lista de respostas possiveis quando se liga a um servidor pelo protocolo http.
Quando se usa API’s fornecidas por terceiros é muito importante analisar os headers retornados pelo servidor para o resultado ser o pretendido!