jsonrpcclient Guide

Choose a client

To use the requests library to send a message over HTTP, install it:

$ pip install 'jsonrpcclient[requests]'

Import the HTTPServer class and instantiate it, passing the server endpoint:

>>> from jsonrpcclient.http_server import HTTPServer
>>> client = HTTPServer('http://cats.com')

There are other options available which use different protocols to send a message. To use those you would import a different class, but the rest of the usage described below is the same for all clients.

Sending a request


Send a request, passing the whole JSON-RPC request object:

>>> client.send('{"jsonrpc": "2.0", "method": "ping", "id": 1}')
--> {"jsonrpc": "2.0", "method": "ping", "id": 1}
<-- {"jsonrpc": "2.0", "result": "pong", "id": 1}


Send a request by passing the method and arguments. This is the main public method.

>>> client.request('cat', name='Mittens')
--> {"jsonrpc": "2.0", "method": "cat", "params": {"name": "Mittens"}, "id": 1}
<-- {"jsonrpc": "2.0", "result": "meow", "id": 1}

If you’re not interested in a response, use notify() instead of request().

The Request class

This class makes it easy to create a JSON-RPC request object:

>>> from jsonrpcclient.request import Request
>>> Request('cat', name='Mittens')
{'jsonrpc': '2.0', 'method': 'cat', 'params': {'name': 'Mittens'}, 'id': 1}

Send a Request object:

>>> client.send(Request('ping'))
--> {"jsonrpc": "2.0", "method": "ping", "id": 1}
<-- {"jsonrpc": "2.0", "result": "pong", "id": 1}

The request() method above, is a wrapper around send(Request()).

If you’re not interested in a response, use the Notification class instead of Request.

Batch requests

JSON-RPC allows you to send multiple requests in a single message:

    {'jsonrpc': '2.0', 'method': 'cat', 'id': 1},
    {'jsonrpc': '2.0', 'method': 'dog', 'id': 2}])

Send multiple Request objects:

client.send([Request('cat'), Request('dog')])

Using list comprehension to get the cube of ten numbers:

client.send([Request('cube', i) for i in range(10)])

Unlike single requests, batch requests return the whole JSON-RPC batch response - a list of responses for each request that had an id member.

The server may not support batch requests.


Import config to configure, for example:

from jsonrpcclient import config
config.validate = False
validate = True

Validate responses against the JSON-RPC schema. Disable to speed up processing.

ids = 'decimal'

Configure the id part of requests. Can be “decimal”, “hex”, “random” or “uuid”.

Configuring the Requests library

HTTPClient makes use of Kenneth Reitz’s Requests library. The Session is available so you can configure it before sending any requests.

For example, Basic Auth:

client.session.auth = ('user', 'pass')

SSL authentication:

client.session.verify = '/path/to/certificate'

Custom HTTP headers:

client.session.headers.update({'Content-Type': 'application/json-rpc'})

You can also configure some Requests options when calling send():

client.send(req, verify=True, cert='/path/to/certificate',
            headers={'Content-Type': 'application/json-rpc'})

As in the Requests library, any dictionaries passed to send in named arguments will be merged with the session-level values that are set. The method-level parameters override session parameters.