# Azure Load Testing Series - Accessing bearer token in Jmeter using JSON extractor
## About this blog
Hey folks!, In this blog we will see how to pass bearer token dynamically while running the test plans.
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## Mock API
In order to cover the scenarios, I have used a mock API that exposes token endpoint and a dummy GET endpoint.
- Mock API
- Mock Oauth Token endpoint
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## Extract token within a thread group using JSON Extractor
### Configuring GET endpoint with HTTP Header manager
- Create ThreadGroup and Add HTTP request , ThreadGroups->Add->Sampler->HTTP Request
- Create HTTP Request for GET endpoint : https://httpbin.org/anything/foo
- Above GET endpoint requires an bearer token to authorize the call.
- We can add the headers by adding config element under the HTTP Request option menu
- In the HTTP header manager add authorization key value as below
```cmd
Authorization : Bearer ${auth_token}
```
- ${auth_token} - We need to somehow get this bearer token dynamically to make sure we send the valid authorization header along with the GET endpoint
### Configuring Token endpoint
- Now we need to follow the same steps of adding HTTP request and HTTP header manager as we did before for the POST endpoint : https://virtserver.swaggerhub.com/helen/oauth-token-mock/1.0.0/token
- Add below key vaule in the Headers manager
```cmd
content-type:application/x-www-form-urlencoded
```
- Request body we will send along with the POST call are
- grant_type : password
- username : Steve Smith
- password : p$ssw0rd
- client_id : test
- client_secret : 99ae8af9-cf8a-4cb3-89b2-9a42b97762b2
- Add listener view result from HTTP request -> Add -> Listener -> View result tree
- Now click on Run for the Get access token endpoint and you can see the bearer token generated in the Response body
### Create JSON extractor
- In order to make use of this token generated in other HTTP requests create a JSON extractor from HTTP Request->Add->Post Processors->JSON Extractor
- Provide "Names of created variables" and JSON Path expression as below
```cmd
Names of create variables : auth_token
JSON Path expressions: $.access_token
```
- Now we can pass on "auth_token" variable in another HTTP request within the same Thread Group
Request Headers
- Now we can see that the bearer token in the request headers
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## Next steps
In our next blog we will see how to pass access token dynamically between different thread groups
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