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Version: 3.13

URI Query Parameters


This page is a less-formal companion to the URI specification, documenting how the officially-supported clients interpret URI parameters. Currently only the Erlang client does so.

The Federation and Shovel plugins specify connections to other brokers using URIs, and are implemented using the Erlang client, so they take all the parameters described here for it.

The Basics

Query parameters are added to the URI in the usual way. Any parameter can be omitted. The client will pick sensible defaults when they are.

Example (non-encrypted):


This specifies a (non-encrypted) network connection to the host myhost. The heartbeat interval is set to 5 seconds, and connection timeout is set to 10 seconds (10,000 milliseconds). Other parameters are set to their default values.

Example (encrypted):


TLS Parameters

This specifies an encrypted network connection to the host myhost. Absolute paths to the certificate files are provided. verify_peer ensures that certificate chain of trust is verified, and server_name_indication validates the CN value in the server's certificate against the hostname myhost.

Parameter nameDescription

Paths to files to use in order to present a client-side SSL certificate to the server. Only of use for the amqps scheme.


Only of use for the amqps scheme and used to configure verification of the server's x509 (TLS) certificate. Note: It is highly recommended to use both values. See the TLS guide to learn more about TLS support in RabbitMQ in general and specifically the Erlang client section.


SASL authentication mechanisms to consider when negotiating a mechanism with the server. This parameter can be specified multiple times, e.g. ?auth_mechanism=plain&auth_mechanism=amqplain, to specify multiple mechanisms.


Heartbeat timeout value in seconds (an integer) to negotiate with the server.


Time in milliseconds (an integer) to wait while establishing a TCP connection to the server before giving up.


Maximum number of channels to permit on this connection.

TLS options can also be specified globally using the amqp_client.ssl_options configuration key in the rabbitmq.config or advanced.config file in this manner:

{amqp_client, [
{ssl_options, [
{cacertfile, "path-to-ca-certificate"},
{certfile, "path-to-certificate"},
{keyfile, "path-to-keyfile"},
{verify, verify_peer},
{fail_if_no_peer_cert, true}

They will be merged with the TLS parameters from the URI (the latter will take precedence) and affect all outgoing RabbitMQ Erlang client connections on the node, including plugins that use the client internally (Federation, Shovel, etc). Please see the TLS guide for details.