AWS Pricing API - Fetch AWS Step Functions price for all regions

listPricingByRegion.js

const AWS = require('aws-sdk');

const pricing = new AWS.Pricing({region: 'us-east-1'});

const main = async () => {

    const output = {};
 
    const prices = await pricing.getProducts({
        ServiceCode: "AmazonStates",
    }).promise();

    const products = prices.PriceList.filter(p => {
        return p.product.attributes.groupDescription == "Number of State Transitions";
    }).forEach((p) => {

        if (p.product.attributes.location == 'Any')
            return; // just skip it

        // see p.json below for the structure of each "product"
        // there are two random keys under p.terms.OnDemand
        const terms = p.terms.OnDemand;
        const randomKey = Object.keys(terms)[0];
        const priceDimensions = terms[randomKey].priceDimensions;
        const randomKey2 = Object.keys(priceDimensions)[0];
        const pricePerUnit = priceDimensions[randomKey2].pricePerUnit.USD;
        const regionCode = regionsMapping[p.product.attributes.location];

        if (!regionCode) throw new Error("Unknown region: " + p.product.attributes.location);

        output[regionCode] = parseFloat(pricePerUnit);
    });

    console.log(JSON.stringify(output));

};

const regionsMapping = {
    'AWS GovCloud (US-West)': 'us-gov-west-1',
    'EU (Stockholm)': 'eu-north-1',
    'EU (Frankfurt)': 'eu-central-1',
    'US East (N. Virginia)': 'us-east-1',
    'Asia Pacific (Tokyo)': 'ap-northeast-1',
    'Asia Pacific (Seoul)': 'ap-northeast-2',
    'EU (Milan)': 'eu-south-1',
    'Africa (Cape Town)': 'af-south-1',
    'US West (N. California)': 'us-west-1',
    'EU (Paris)': 'eu-west-3',
    'Asia Pacific (Sydney)': 'ap-southeast-2',
    'Asia Pacific (Hong Kong)': 'ap-east-1',
    'EU (London)': 'eu-west-2',
    'Middle East (Bahrain)': 'me-south-1',
    'US East (Ohio)': 'us-east-2',
    'Asia Pacific (Mumbai)': 'ap-south-1',
    'Asia Pacific (Singapore)': 'ap-southeast-1',
    'AWS GovCloud (US-East)': 'us-gov-east-1',
    'Canada (Central)': 'ca-central-1',
    'EU (Ireland)': "eu-west-1",
    'US West (Oregon)': "us-west-2",
    'South America (Sao Paulo)': 'sa-east-1',
};

main();

output.json

{
    "us-gov-west-1": 0.00003,
    "eu-north-1": 0.000025,
    "eu-central-1": 0.000025,
    "us-east-1": 0.000025,
    "ap-northeast-1": 0.000025,
    "ap-northeast-2": 0.0000271,
    "eu-south-1": 0.00002625,
    "af-south-1": 0.00002975,
    "us-west-1": 0.0000279,
    "eu-west-3": 0.0000297,
    "ap-southeast-2": 0.000025,
    "ap-east-1": 0.0000275,
    "eu-west-2": 0.000025,
    "me-south-1": 0.0000275,
    "us-east-2": 0.000025,
    "ap-south-1": 0.0000285,
    "ap-southeast-1": 0.000025,
    "us-gov-east-1": 0.00003,
    "ca-central-1": 0.000025,
    "eu-west-1": 0.000025,
    "us-west-2": 0.000025,
    "sa-east-1": 0.0000375
}

p.json

{
    "product": {
        "productFamily": "AWS Step Functions",
        "attributes": {
            "group": "SFN-StateTransitions",
            "locationType": "AWS Region",
            "usagetype": "EU-StateTransition",
            "servicename": "AWS Step Functions",
            "location": "EU (Ireland)",
            "operation": "",
            "groupDescription": "Number of State Transitions",
            "servicecode": "AmazonStates"
        },
        "sku": "XGGWEYVMS82UQ68Y"
    },
    "version": "20200427230151",
    "terms": {
        "OnDemand": {
            "XGGWEYVMS82UQ68Y.JRTCKXETXF": {
                "sku": "XGGWEYVMS82UQ68Y",
                "termAttributes": {},
                "offerTermCode": "JRTCKXETXF",
                "effectiveDate": "2020-04-01T00:00:00Z",
                "priceDimensions": {
                    "XGGWEYVMS82UQ68Y.JRTCKXETXF.6YS6EN2CT7": {
                        "description": "$0.000025 per state transition",
                        "appliesTo": [],
                        "rateCode": "XGGWEYVMS82UQ68Y.JRTCKXETXF.6YS6EN2CT7",
                        "unit": "StateTransitions",
                        "beginRange": "0",
                        "pricePerUnit": {
                            "USD": "0.0000250000"
                        },
                        "endRange": "Inf"
                    }
                }
            }
        }
    },
    "serviceCode": "AmazonStates",
    "publicationDate": "2020-04-27T23:01:51Z"
}