This quickstart will guide you through creating your first identity with shared ratelimits and a key that is connected to the identity. The example is written in TypeScript, purposefully using the fetch API to make requests as transparent as possible. You can use any language or library to make requests to the Unkey API.

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Requirements

You will need your api id and root key to make requests to the Unkey API. You can find these in the Unkey dashboard. 
const apiId = "api_XXX";
const rootKey = "unkey_XXX";
The root key requires the following permissions: 
"identity.*.create_identity"
"identity.*.read_identity"
"identity.*.update_identity"
"api.*.create_key"

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Create an Identity

To create an identity, you need to make a request to the /v1/identities.createIdentity endpoint. You can specify an externalId and meta object to store additional information about the identity. Unkey does not care what the externalId is, but it must be unique for each identity. Commonly used are user or organization ids. The meta object can be used to store any additional information you want to associate with the identity. 
const externalId = "user_1234abc";

const createIdentityResponse = await fetch("https://api.unkey.dev/v1/identities.createIdentity", {
    method: "POST",
    headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${rootKey}`,
    },
    body: JSON.stringify({
        externalId,
        meta: {
        stripeCustomerId: "cus_123",
        },
    }),
});

const { identityId } = await createIdentityResponse.json<{
    identityId: string;
}>();

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Retrieve an Identity

Let’s retrieve the identity to make sure it got created successfully 
const getIdentityResponse = await fetch(`https://api.unkey.dev/v1/identities.getIdentity?identityId=${identityId}`, {
    method: "GET",
    headers: {
        Authorization: `Bearer ${rootKey}`,
    }
});

const identity = await getIdentityResponse.json<{
    id: string;
    externalId: string;
    meta: unknown;
    ratelimits: Array<{ name: string; limit: number; duration: number }>;
}>();

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Create a Key

Let’s create a key and connect it to the identity 
const createKeyResponse = await fetch(`https://api.unkey.dev/v1/keys.createKey`, {
    method: "POST",
    headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${rootKey}`,
    },
    body: JSON.stringify({
        apiId: apiId,
        prefix: "acme",
        // by providing the same externalId as the identity, we connect the key to the identity
        externalId: externalId, 
    }),
});

const key = await createKeyResponse.json<{
    keyId: string;
    key: string;
}>();

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Verify the Key

When you verify the key, you will receive the identity that the key is connected to and can act accordingly in your API handler. 
const verifyKeyResponse = await fetch(`https://api.unkey.dev/v1/keys.verifyKey`, {
    method: "POST",
    headers: {
    "Content-Type": "application/json",
    },
    body: JSON.stringify({
        apiId: apiId,
        key: key.key,
    }),
});

const verified = await verifyKeyResponse.json<{
    valid: boolean;
    identity: {
        id: string;
        externalId: string;
        meta: unknown;
    };
}>();

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Ratelimits

Ratelimits can be set on the identity level. Ratelimits set on the identity level are shared across all keys connected to the identity. 

const updateRes = await fetch("https://api.unkey.dev/v1/identities.updateIdentity", {
    method: "POST",
    headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${rootKey}`,
    },
    body: JSON.stringify({
        identityId: identity.id,
        ratelimits: [
        /**
         * We define a limit that allows 10 requests per day
         */
        {
            name: "requests",
            limit: 10,
            duration: 24 * 60 * 60 * 1000, // 24h
        },
        /**
         * And a second limit that allows 1000 tokens per minute
         */
        {
            name: "tokens",
            limit: 1000,
            duration: 60 * 1000, // 1 minute
        },
        ],
    }),
});

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Verify the Key with Ratelimits

Now let’s verify the key again and specify the limits In this case, we pretend like a user is requesting to use 200 tokens. We specify the requests ratelimit to enforce a limit of 10 requests per day and the tokens ratelimit to enforce a limit of 1000 tokens per minute. Additionally we specify the cost of the tokens to be 200. 
const verifiedWithRatelimitsResponse = await fetch(`https://api.unkey.dev/v1/keys.verifyKey`, {
    method: "POST",
    headers: {
        "Content-Type": "application/json",
    },
    body: JSON.stringify({
        apiId: apiId,
        key: key.key,
        ratelimits: [
            {
                name: "requests",
            },
            {
                name: "tokens",
                cost: 200,
            },
        ],
    }),
});

const verifiedWithRatelimits = await verifiedWithRatelimitsResponse.json<{
    valid: boolean;
    identity: {
        id: string;
        externalId: string;
        meta: unknown;
    };
}>();
That’s it, you have successfully created an identity and key with shared ratelimits. You can now use the key to verify requests and enforce ratelimits in your API handler.