The method to specify the bucket and API token for InfluxDB by utilizing a JSON file is as follows:

1. Create a JSON file with the following structure:

{ "bucket": "yourbucketname", "token": "yourapitoken" }

1. Replace "yourbucketname" with the actual name of your InfluxDB bucket and "yourapitoken" with your actual API token.

2. Save the file with a name of your choice and with the extension ".json".

3. In your code, use a JSON parsing library to read the contents of the file and extract the "bucket" and "token" values.

4. Use these values to connect to InfluxDB and interact with the specified bucket.

Example code using Python and the "json" library:

import json from influxdb_client import InfluxDBClient

with open("influxdb_config.json", "r") as f: config = json.load(f)

bucketname = config["bucket"] apitoken = config["token"]

client = InfluxDBClient(url="http://localhost:8086", token=api_token)

bucket = client.bucketsapi().findbucketbyname(bucket_name)

Use the bucket object to perform queries, write data, etc.