/write 1.x compatibility API

The /write 1.x compatibility endpoint writes data to InfluxDB Cloud and InfluxDB OSS 2.9 using patterns from the InfluxDB 1.x /write API endpoint. Use the POST request method to write line protocol to the /write endpoint.

POST http://localhost:8086/write

Authentication

Use one of the following authentication methods:

• token authentication
• basic authentication with username and password
• query string authentication with username and password

For more information, see Authentication.

Request body

Include your line protocol in the request body. Binary encode the line protocol to prevent unintended formatting. The examples below use the curl --data-binary flag to binary encode the line protocol.

Query string parameters

u

(Optional) The 1.x username to authenticate the request. See query string authentication.

p

(Optional) The 1.x password to authenticate the request. See query string authentication.

db

(Required) The database to write data to. This is mapped to an InfluxDB bucket. See Database and retention policy mapping.

rp

The retention policy to write data to. This is mapped to an InfluxDB bucket. See Database and retention policy mapping.

precision

The precision of Unix timestamps in the line protocol. Default is nanosconds (ns). The following precisions are available:

• ns - nanoseconds
• u or µ - microseconds
• ms - milliseconds
• s - seconds
• m - minutes
• h - hours

Write examples

• Write data using basic authentication
• Write data to a non-default retention policy
• Write multiple lines of line protocol
• Write data with millisecond Unix timestamps
• Use curl to write data from a file

Write data using basic authentication

curl --request POST http://localhost:8086/write?db=
DATABASE_NAME
 \
  --user "
USERNAME
:
PASSWORD_OR_TOKEN
" \
  --data-binary "measurement,host=host1 field1=2i,field2=2.0 1577836800000000000"

Write data using token authentication

curl --request POST http://localhost:8086/write?db=
DATABASE_NAME
 \
  --header "Authorization: Token 
API_TOKEN
" \
  --data-binary "measurement,host=host1 field1=2i,field2=2.0 1577836800000000000"

Write data to a non-default retention policy

curl --request POST "http://localhost:8086/write?db=
DATABASE_NAME
&rp=RETENTION_POLICY" \
  --header "Authorization: Token 
API_TOKEN
" \
  --data-binary "measurement,host=host1 field1=2i,field2=2.0 1577836800000000000"

Write multiple lines of line protocol

curl --request POST http://localhost:8086/write?db=
DATABASE_NAME
 \
  --header "Authorization: Token 
API_TOKEN
" \
  --data-binary "measurement,host=host1 field1=2i,field2=2.0 1577836800000000000
measurement,host=host2 field1=14i,field2=12.7 1577836800000000000
measurement,host=host3 field1=5i,field2=6.8 1577836800000000000"

Write data with millisecond Unix timestamps

curl --request POST "http://localhost:8086/write?db=
DATABASE_NAME
&precision=ms" \
  --header "Authorization: Token 
API_TOKEN
" \
  --data-binary "measurement,host=host1 field1=2i,field2=2.0 1577836800000"

Use curl to write data from a file

curl --request POST http://localhost:8086/write?db=
DATABASE_NAME
 \
  --header "Authorization: Token 
API_TOKEN
" \
  --data-binary @path/to/line-protocol.txt

Replace the following:

• DATABASE_NAME and RETENTION_POLICY: the database and retention policy mapping (DBRP) for the InfluxDB v2 bucket that you want to write to
• USERNAME: your InfluxDB 1.x username
• PASSWORD_OR_TOKEN: your InfluxDB 1.x password or InfluxDB API token
• API_TOKEN: your InfluxDB API token