Question: I get this error loghttp.PushRequest.Streams: []*loghttp.Stream: unmarshalerDecoder: Value looks like Number/Boolean/None, but can't find its end: ',' or '}' symbol, error found in #10 byte of ...| ] } ] }|..., bigger context ...| } } ] } ] }|...  when uploading the json { "streams":[ { "stream":{ "application":"fabric-sso", "job":"aws-lambda", "level":"info", "namespace":"oauth" }, "values":[ { "ts":"2022-12-10T01:36:44.971933+05:30", "message":{ "type":"h2", "timestamp":"2022-09-17T11:00:03.828554Z", "alb":"app/fabric-sso/sdjsjhdjhdshksdhf", "client_ip":"999.999.999.999", "client_port":"7392", "backend_ip":"", "backend_port":"", "request_processing_time":"-1", "backend_processing_time":"-1", "response_processing_time":"-1", "alb_status_code":"404", "backend_status_code":"-", "received_bytes":"706", "sent_bytes":"67", "request_verb":"GET", "request_url":"https://foozy.dev.gabbar.com:443/gabbar", "request_proto":"HTTP/2.0", "user_agent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36", "ssl_cipher":"ECDHE-RSA-AES128-GCM-SHA256", "ssl_protocol":"TLSv1.2", "target_group_arn":"-", "trace_id":"Root=1-6325a8b3-1980ccbd244b83c35ec5b543", "domain_name":"foozy.dev.gabbar.com", "chosen_cert_arn":"arn:aws:acm:us-east-1:23232323:certificate/0000", "matched_rule_priority":"0", "request_creation_time":"2022-09-17T11:00:03.818000Z", "actions_executed":"waf,fixed-response", "redirect_url":"-", "lambda_error_reason":"-", "target_port_list":"-", "target_status_code_list":"-", "classification":"-", "classification_reason":"-", "application":"fabric-sso", "env":"dev" } } ] } ] }  alb_log_data is a dictionary, I create a list of dictionaries with timestamp and the actual alb log message (as json) and post it like so def build_loki_request_payload(alb_log_data): entries = [] for entry in alb_log_data: curr_datetime = datetime.datetime.now(pytz.timezone('Asia/Kolkata')) curr_datetime = curr_datetime.isoformat('T') entries.append({'ts': curr_datetime, 'message': entry}) payload = { 'streams': [{ "stream": { "application": alb_log_data[0]['application'], "job": "aws-lambda", "level": "info", "namespace": "oauth" }, "values": entries }] } payload = json.dumps(payload) logger.debug('Created Payload %s', payload) return payload 

Answer: I missed the right format, as in the example in Loki documentation https://grafana.com/docs/loki/latest/api/#push-log-entries-to-loki { "streams": [ { "stream": { "label": "value" }, "values": [ [ "<unix epoch in nanoseconds>", "<log line>" ], [ "<unix epoch in nanoseconds>", "<log line>" ] ] } ] }  changed the method to def build_loki_request_payload(alb_log_data): entries = [] for entry in alb_log_data: entries.append([time.time_ns(), json.dumps(entry)]) payload = { 'streams': [{ "stream": { "application": alb_log_data[0]['application'], "job": "aws-lambda", "level": "info", "namespace": "oauth" }, "values": entries }] } payload = json.dumps(payload) logger.debug('Created Payload %s', payload) return payload  which now gives { "streams":[ { "stream":{ "application":"fabric-sso", "job":"aws-lambda", "level":"info", "namespace":"oauth" }, "values":[ [ "1670645653278432000", "{\"type\": \"h2\", \"timestamp\": \"2022-09-17T11:00:03.828554Z\", \"alb\": \"app/fabric-sso/123456\", \"client_ip\": \"230.82.1.129\", \"client_port\": \"7392\", \"backend_ip\": \"\", \"backend_port\": \"\", \"request_processing_time\": \"-1\", \"backend_processing_time\": \"-1\", \"response_processing_time\": \"-1\", \"alb_status_code\": \"404\", \"backend_status_code\": \"-\", \"received_bytes\": \"706\", \"sent_bytes\": \"67\", \"request_verb\": \"GET\", \"request_url\": \"https://foozy.dev.gabbar.com:443/gabbar\", \"request_proto\": \"HTTP/2.0\", \"user_agent\": \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36\", \"ssl_cipher\": \"ECDHE-RSA-AES128-GCM-SHA256\", \"ssl_protocol\": \"TLSv1.2\", \"target_group_arn\": \"-\", \"trace_id\": \"Root=1-6325a8b3-1980ccbd244b83c35ec5b543\", \"domain_name\": \"foozy.dev.gabbar.com\", \"chosen_cert_arn\": \"arn:aws:acm:us-east-1:3246283467784628:certificate/814e-d1e61e9e7f9b\", \"matched_rule_priority\": \"0\", \"request_creation_time\": \"2022-09-17T11:00:03.818000Z\", \"actions_executed\": \"waf,fixed-response\", \"redirect_url\": \"-\", \"lambda_error_reason\": \"-\", \"target_port_list\": \"-\", \"target_status_code_list\": \"-\", \"classification\": \"-\", \"classification_reason\": \"-\", \"application\": \"fabric-sso\", \"env\": \"dev\"}" ] ] } ] }