| 0 | CURLE_OK | Success | 
 | 1 | CURLE_UNSUPPORTED_PROTOCOL | Unsupported protocol. This version of cURL does not support this protocol. | 
 | 2 | CURLE_FAILED_INIT | Initialization failed. | 
 | 3 | CURLE_URL_MALFORMAT | URL format error. | 
 | 4 | CURLE_NOT_BUILT_IN | Function not compiled into this version of cURL. | 
 | 5 | CURLE_COULDNT_RESOLVE_PROXY | Unable to resolve proxy server. | 
 | 6 | CURLE_COULDNT_RESOLVE_HOST | Unable to resolve host name. | 
 | 7 | CURLE_COULDNT_CONNECT | Unable to connect to remote server. | 
 | 8 | CURLE_WEIRD_SERVER_REPLY | Server reply was abnormal. | 
 | 9 | CURLE_REMOTE_ACCESS_DENIED | Remote access denied. | 
 | 10 | CURLE_FTP_ACCEPT_FAILED | FTP accept failed. | 
 | 11 | CURLE_FTP_WEIRD_PASS_REPLY | FTP password reply was abnormal. | 
 | 12 | CURLE_FTP_ACCEPT_TIMEOUT | FTP accept timed out. | 
 | 13 | CURLE_FTP_WEIRD_PASV_REPLY | FTP PASV reply was abnormal. | 
 | 14 | CURLE_FTP_WEIRD_227_FORMAT | FTP 227 format was abnormal. | 
 | 15 | CURLE_FTP_CANT_GET_HOST | FTP could not get host. | 
 | 16 | CURLE_HTTP2 | HTTP/2 error. | 
 | 17 | CURLE_FTP_COULDNT_SET_TYPE | FTP could not set type. | 
 | 18 | CURLE_PARTIAL_FILE | Partial file transfer failed. | 
 | 19 | CURLE_FTP_COULDNT_RETR_FILE | FTP could not retrieve file. | 
 | 20 | CURLE_OBSOLETE20 | Obsolete. | 
 | 21 | CURLE_QUOTE_ERROR | Command execution error. | 
 | 22 | CURLE_HTTP_RETURNED_ERROR | HTTP request returned error. | 
 | 23 | CURLE_WRITE_ERROR | Write error. | 
 | 24 | CURLE_OBSOLETE24 | Obsolete. | 
 | 25 | CURLE_UPLOAD_FAILED | Upload failed. | 
 | 26 | CURLE_READ_ERROR | Read error. | 
 | 27 | CURLE_OUT_OF_MEMORY | Out of memory. | 
 | 28 | CURLE_OPERATION_TIMEDOUT | Operation timed out. | 
 | 29 | CURLE_OBSOLETE29 | Obsolete. | 
 | 30 | CURLE_FTP_PORT_FAILED | FTP PORT command failed. | 
 | 31 | CURLE_FTP_COULDNT_USE_REST | FTP could not use REST command. | 
 | 32 | CURLE_OBSOLETE32 | Obsolete. | 
 | 33 | CURLE_RANGE_ERROR | Range error. | 
 | 34 | CURLE_HTTP_POST_ERROR | HTTP POST request error. | 
 | 35 | CURLE_SSL_CONNECT_ERROR | SSL connection error. | 
 | 36 | CURLE_BAD_DOWNLOAD_RESUME | Download resume error. | 
 | 37 | CURLE_FILE_COULDNT_READ_FILE | Could not read file. | 
 | 38 | CURLE_LDAP_CANNOT_BIND | LDAP could not bind. | 
 | 39 | CURLE_LDAP_SEARCH_FAILED | LDAP search failed. | 
 | 40 | CURLE_OBSOLETE40 | Obsolete. | 
 | 41 | CURLE_FUNCTION_NOT_FOUND | Function not found. | 
 | 42 | CURLE_ABORTED_BY_CALLBACK | Callback function interrupted. | 
 | 43 | CURLE_BAD_FUNCTION_ARGUMENT | Function argument error. | 
 | 44 | CURLE_OBSOLETE44 | Obsolete. | 
 | 45 | CURLE_INTERFACE_FAILED | Interface failed. | 
 | 46 | CURLE_OBSOLETE46 | Obsolete. | 
 | 47 | CURLE_TOO_MANY_REDIRECTS | Too many redirects. | 
 | 48 | CURLE_UNKNOWN_OPTION | Unknown option. | 
 | 49 | CURLE_SETOPT_OPTION_SYNTAX | Option syntax error. | 
 | 50 | CURLE_OBSOLETE50 | Obsolete. | 
 | 51 | CURLE_OBSOLETE51 | Obsolete. | 
 | 52 | CURLE_GOT_NOTHING | Received no data. | 
 | 53 | CURLE_SSL_ENGINE_NOTFOUND | SSL engine not found. | 
 | 54 | CURLE_SSL_ENGINE_SETFAILED | SSL engine setup failed. | 
 | 55 | CURLE_SEND_ERROR | Send error. | 
 | 56 | CURLE_RECV_ERROR | Receive error. | 
 | 57 | CURLE_OBSOLETE57 | Obsolete. | 
 | 58 | CURLE_SSL_CERTPROBLEM | SSL certificate problem. | 
 | 59 | CURLE_SSL_CIPHER | SSL cipher problem. | 
 | 60 | CURLE_PEER_FAILED_VERIFICATION | Peer verification failed. | 
 | 61 | CURLE_BAD_CONTENT_ENCODING | Content encoding error. | 
 | 62 | CURLE_OBSOLETE62 | Obsolete. | 
 | 63 | CURLE_FILESIZE_EXCEEDED | File size exceeded limit. | 
 | 64 | CURLE_USE_SSL_FAILED | Using SSL failed. | 
 | 65 | CURLE_SEND_FAIL_REWIND | Send rewind failed. | 
 | 66 | CURLE_SSL_ENGINE_INITFAILED | SSL engine initialization failed. | 
 | 67 | CURLE_LOGIN_DENIED | Login denied. | 
 | 68 | CURLE_TFTP_NOTFOUND | TFTP file not found. | 
 | 69 | CURLE_TFTP_PERM | TFTP permission error. | 
 | 70 | CURLE_REMOTE_DISK_FULL | Remote disk full. | 
 | 71 | CURLE_TFTP_ILLEGAL | TFTP illegal operation. | 
 | 72 | CURLE_TFTP_UNKNOWNID | TFTP unknown ID. | 
 | 73 | CURLE_REMOTE_FILE_EXISTS | Remote file already exists. | 
 | 74 | CURLE_TFTP_NOSUCHUSER | TFTP user does not exist. | 
 | 75 | CURLE_OBSOLETE75 | Obsolete. | 
 | 76 | CURLE_OBSOLETE76 | Obsolete. | 
 | 77 | CURLE_SSL_CACERT_BADFILE | SSL CA certificate file error. | 
 | 78 | CURLE_REMOTE_FILE_NOT_FOUND | Remote file not found. | 
 | 79 | CURLE_SSH | SSH error. | 
 | 80 | CURLE_SSL_SHUTDOWN_FAILED | SSL shutdown failed. | 
 | 81 | CURLE_AGAIN | Resource temporarily unavailable. | 
 | 82 | CURLE_SSL_CRL_BADFILE | SSL CRL file error. | 
 | 83 | CURLE_SSL_ISSUER_ERROR | SSL issuer error. | 
 | 84 | CURLE_FTP_PRET_FAILED | FTP PRET command failed. | 
 | 85 | CURLE_RTSP_CSEQ_ERROR | RTSP CSEQ error. | 
 | 86 | CURLE_RTSP_SESSION_ERROR | RTSP session error. | 
 | 87 | CURLE_FTP_BAD_FILE_LIST | FTP file list error. | 
 | 88 | CURLE_CHUNK_FAILED | Chunk failed. | 
 | 89 | CURLE_NO_CONNECTION_AVAILABLE | No available connection. | 
 | 90 | CURLE_SSL_PINNEDPUBKEYNOTMATCH | SSL pinned public key mismatch. | 
 | 91 | CURLE_SSL_INVALIDCERTSTATUS | SSL invalid certificate status. | 
 | 92 | CURLE_HTTP2_STREAM | HTTP/2 stream error. | 
 | 93 | CURLE_RECURSIVE_API_CALL | Recursive API call. | 
 | 94 | CURLE_AUTH_ERROR | Authentication error. | 
 | 95 | CURLE_HTTP3 | HTTP/3 error. | 
 | 96 | CURLE_QUIC_CONNECT_ERROR | QUIC connection error. | 
 | 97 | CURLE_PROXY | Proxy error. | 
 | 98 | CURLE_SSL_CLIENTCERT | Client SSL certificate error. | 
 | 99 | CURLE_UNRECOVERABLE_POLL | Unrecoverable poll error. | 
 | 100 | CURLE_TOO_LARGE | Request too large. | 
 | 101 | CURLE_ECH_REQUIRED | ECH required. |