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Cosmos RPC

With QuickNode, you get access to our global network which always routes your API requests to the nearest available location, ensuring low latency and fastest speeds.


The QuickNode Cosmos documentation constantly evolves as the chain undergoes upgrades and changes. We highly recommend cross-referencing with the Cosmos Documentation for the latest updates.


At QuickNode, we run Cosmos RPC endpoints. In aggregate, we serve hundreds of billions of requests every month. To make it easier for developers to integrate with QuickNode, we've created this documentation that shows how to call RPC methods using cURL, JavaScript, Python, Ruby, Go and any applicable Web3 SDKs. QuickNode-supported Cosmos APIs include:

  • Tendermint JSON-RPC/REST API
  • Cosmos gRPC and REST API

Cosmos Network Support


Making Cosmos API Requests

In this documentation, you will see example requests made with various programming languages and Web3 SDKs for each supported Cosmos method. This section will explain how to execute each one of them on your machine.


Most *nix based systems have cURL support out of the box. cURL is a command line tool and library for transferring data with URLs. Check if you have it by running the following:

curl -h


To run our Python code examples, you'll need to have Python installed as well as the requests package. You can install this package with the following command:

python -m pip install requests


To run our JavaScript code examples, you'll need to have Node v18 and up installed. You can follow this official document to install the latest, stable version of Node globally. Check if you have it by running the following:

node -v


To run our Ruby code examples, you'll need to have Ruby installed. You can follow this official installation document for more information. Check if you have it by running the following:

ruby -v is a Python library for interacting with Ethereum. If you'd like to use it, please be sure to install it like so:

pip install web3


At QuickNode we prefer ethers.js as our JS library for interacting with JSON-RPCs when possible. Ethers aims to be a complete and compact library for interacting with the Ethereum Blockchain and its ecosystem. If you'd like to use it, please be sure to install it like so:

npm install ethers


Eth.rb is a comprehensive ruby library that provides a high-level interface to interact with the Ethereum blockchain, making it easier for developers to manage accounts, send transactions, and work with smart contracts. If you'd like to use it, please be sure to install it like so:

gem install eth


Go is a statically-typed, compiled language known for its simplicity, efficiency, and strong concurrency support, making it well-suited for developing applications and services. You can follow this official installation document for more information. Check if you have it by running the following:

go version

Authentication Required for Cosmos gRPC

To ensure secure access to Cosmos gRPC, users are required to authenticate themselves. This authentication process is necessary before utilizing any method. QuickNode endpoints consist of two crucial components: the endpoint name and the corresponding token. Users will need to use these two components to configure a gRPC client with authentication credentials before they make any method calls.

Throughout this documentation, we will demonstrate how to handle authentication using the getGrpcOptions function. This function is utilized in each code sample to configure the gRPC client with authentication credentials. Here is the code implementation of the getGrpcOptions function as well as a basicAuth implementation of RPC credentials:

package main

import (

func getGrpcOptions(endpointURL string) (string, []grpc.DialOption) {
parsed, err := url.Parse(endpointURL)
if err != nil {

username := strings.Split(parsed.Host, ".")[0]
password := strings.Trim(parsed.Path, "/")
grpcOpts := []grpc.DialOption{
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(1024 * 1024 * 1024)),

grpcOpts = append(grpcOpts, grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})))
port := 9090

target := fmt.Sprintf("%s:%d", parsed.Hostname(), port)
if password == "" {
log.Println("no auth token (password) set, skipping basic auth")
return target, grpcOpts

// create rpc credentials using basicAuth implementation of credentials.PerRPCCredentials
creds := basicAuth{username: username, password: password}
grpcOpts = append(grpcOpts, grpc.WithPerRPCCredentials(creds))

return target, grpcOpts

// basicAuth is a simple implementation of credentials.PerRPCCredentials
// to support basic authentication for grpc requests
// customers may copy/paste this or implement with their own struct
type basicAuth struct {
username string
password string

func (b basicAuth) GetRequestMetadata(ctx context.Context, in ...string) (map[string]string, error) {
auth := b.username + ":" + b.password
enc := base64.StdEncoding.EncodeToString([]byte(auth))
return map[string]string{
"authorization": "Basic " + enc,
}, nil

func (basicAuth) RequireTransportSecurity() bool {
return false

The getGrpcOptions function configures a gRPC client with the necessary security options and establishes a connection to the specified endpoint on port 9090. It takes the endpoint as input parameters and returns the target address and a set of options to configure the gRPC client for establishing a connection to the specified endpoint, which you can use to make authenticated API calls.

target, opts := getGrpcOptions("YOUR_QUICKNODE_ENDPOINT")
grpcConn, err := grpc.Dial(target, opts...)
if err != nil {

defer grpcConn.Close()

API Credits

Usage in our pricing plans is measured in API Credits. To learn more about the API Credits for Cosmos, please visit this page.

WebSocket Limits

WebSocket responses are capped at a certain limit, which is subject to change. In cases where responses are potentially large, it is recommended to use a POST request. If the response size exceeds the limit, the associated error code will be -32616.

Endpoint Authentication Options


Please note that setting JWT (JSON Web Tokens), configuring all whitelist options, and changing any rate limits beyond credits per second are only available to users on the Build plan or above. Users on the Discover/Discover+ plans can only change their credits per second rate limit or add, use, and delete an authentication token. Visit our pricing page for more information.

Token Authentication

By default, all endpoints created on QuickNode are protected by a token in the URL which looks something like this:

Approved Referrer List

For endpoints on the shared network, you are able to add a list of approved referrers. This requires any HTTP request to send a REFERRER header or any WebSocket request to send an ORIGIN header populated with one of the referrers you entered into our user panel.

Disabling Token Authentication

You can also disable the token authentication completely in your security settings for a given endpoint. This will allow anyone to make requests to the endpoint without the token.

JWT (JSON Web Tokens)

For additional security, you can also enable JWT for each of your deployed endpoints. JWT allows for stateless authentication between you and your endpoint. Learn how to use JWT with QuickNode in this step-by-step guide.

Multiple Authentication Tokens

Create multiple authentication tokens for each of your deployed endpoints. This allows you to revoke any tokens that may be comprised, without needing to restart your non-compromised endpoint.

To roll an individual authentication token, create an additional token and then delete the previous token. Learn more about multiple authentication tokens in this QuickNode guide.

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