HTTP Callouts from Salesforce Flow

HTTP Callouts from Salesforce Flow is a new Salesforce Winter ’23 feature.

Allowing API calls to be configured and used from within flows, perfect for integrating external data into a flow and enriching Salesforce records.

The inspiration for this article comes from this video made by Andy Engin Utkan and Josh Dayment. Thanks to these two, I was able to replicate their example and then build a completely different one. Thanks guys!

Get the weather for Lead records

Weatherstack has a free plan with 250 API calls that is perfect for testing a HTTP Callout from flow. Pass it a city and a measurement unit and it will return the current weather.

Go here to the Weatherstack website to signup.

Select the Free Plan:

weatherstack api

Sign up for a new account

Enter your account details to create a new account.

Next, you will be taken to a dashboard that will display your new API Key:

get your api key for the HTTP Callout

Copy this API Access Key for the next step.

Create a new Custom Label

Create a new custom label in Salesforce to store this API Access Key

(Setup -> Custom Labels)

Create a new custom label and paste your new API key into the value field. You will use this to pass the key value to the HTTP Callout in your flow.  (Every key is different so don’t attempt to use mine)

create a custom label for the HTTP Callouts from Salesforce Flow

Create new Named Credential for this API Service

This is to setup the API endpoint (where the call is going to) and how the authentication will work.

(Setup -> Named Credentials)

Select New Legacy (on dropdown arrow on right)

setup named credentials for the HTTP Callouts from Salesforce Flow

Complete as follows:

Add a Label and click tab to auto populate the name

Enter the provided URL:

Be sure to select all three Callout Options.

 for the HTTP Callout

Save to complete.

Create a Screen Flow

You will use a simple screen flow triggered by a button on the lead record to display the current weather for the city of your lead record.

New -> Screen Flow

Create a new variable named recordId that will be used to pass the current lead record into your flow.

Data Type = record

Object = lead

Available for input = checked

create a variable HTTP for the Callouts from Salesforce Flow

Add a new Action to the flow

Add a new Action to the flow:

add a new action

Note: If you do not see this “Create HPPT Callout (Beta)” then you don’t have a preview org or your developer org has not been upgraded to Spring 23 yet.

Give this new HPPT Callout Action a name (1) and select the Named Credential you created earlier (2).

configure the action for the HTTP Callouts from Salesforce Flow

Click Next

Populate params

Now you will populate the three parameters you need to pass to the API:

  • access_key
  • query
  • units

All are defined as strings and set to required:

populate params

You are still not ready to click DONE! There is one more thing to do:

provide a response HTTP Callouts from Salesforce Flow

You need to provide Salesforce with a sample response of what the reply from the API will look like. This way the fields returned (in JSON format) will all be nicely formatted for you to easily use in flow.

In the documentation for Weatherstack, they provide a sample API response but it was missing one new parameter and sometimes caused the flow to crash. I have updated the response with the new parameter so use this one below:

API Response


    “request”: {

        “type”: “City”,

        “query”: “New York, United States of America”,

        “language”: “en”,

        “unit”: “m”


    “location”: {

        “name”: “New York”,

        “country”: “United States of America”,

        “region”: “New York”,

        “lat”: “40.714”,

        “lon”: “-74.006”,

        “timezone_id”: “America/New_York”,

        “localtime”: “2019-09-07 08:14”,

        “localtime_epoch”: 1567844040,

        “utc_offset”: “-4.0”


    “current”: {

        “observation_time”: “12:14 PM”,

        “temperature”: 13,

        “weather_code”: 113,

        “weather_icons”: [



        “weather_descriptions”: [



        “wind_speed”: 0,

        “wind_degree”: 349,

        “wind_dir”: “N”,

        “pressure”: 1010,

        “precip”: 0,

        “humidity”: 90,

        “cloudcover”: 0,

        “feelslike”: 13,

        “uv_index”: 4,

        “visibility”: 16,

        “is_day”: “yes”



Copy the text above and paste into the Sample JSON Response as shown below (1)

Then click Review (2)

review the response for HTTP Callouts from Salesforce Flow

If the response is correct then the Data Structure will be displayed on the right.

Click Done

Configure HTTP Callout for use in this flow

Now the HTTP Callout has been defined, you can configure it for use in this flow:

configure the action for this flow

Note the following:

Access_key – (1) this is the label that you setup earlier with your API Key

Query – (2) here you use the city value from your lead record

Units – (3) you can use “m” for metric units or “f” for Fahrenheit units

Next, add a Screen Element to display the results

Add a Display Test component inside this screen:

add display text to show results

Here’s the text you need to create (unfortunately you can’t just cut and paste this in)

Response Code:


Weather for: {!} {!} at: {!Call_Weather.2XX.location.localtime} (localtime)

Temperature: {!Call_Weather.2XX.current.temperature}

Humidity: {!Call_Weather.2XX.current.humidity}

Feels Like: {!Call_Weather.2XX.current.feelslike}

Rainfall: {!Call_Weather.2XX.current.precip}

Wind Speed: {!Call_Weather.2XX.current.windx5fspeed}

Wind Direction: {!Call_Weather.2XX.current.windx5fdir}

Your finished flow should look like this:

flow diagram for the HTTP Callouts from Salesforce Flow

Save and activate the flow

Run it in debug mode to test it works (select a lead in the recordId field)

run the flow in debug mode

Check for values returned here:

A response code of 200 is a success!


Save and name the flow

save the flow HTTP Callouts from Salesforce Flow

Next, create an Action on the Lead object to run the flow

create an action to run the flow

Finally, put the button on the Lead page Layout

drag button to the page layout

Open a lead record (make sure they have a city value in their address)

Click the Check Weather button:

check lead to show the HTTP Callouts from Salesforce Flow

Remember, you only have 250 free API calls on the free account so once these run out you will get an error in your response code indicating this. Don’t use the free account in production you will run out of free calls real quick!

You can find many free (and paid) APIs at to try for yourself by applying the same principles shown above.

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  1. Awesome walk through, thanks for the effort. A side benefit was Named Credentials – first example that actually worked so thanks again on the side.

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