Make Request to Auth0 api from react native app

I have a react native app authenticated with Auth0.

I have an API that uses react native.

When a user signs in, i take the accessToken that is given for that user, and I make request to the API with the accessToken set as the authorization header.

I do so like this:

const requestHeader = {
        headers: {
            Authorization: `Bearer ${accessToken}`,
    } + '/api/example/', requestHeader)

The accessToken is something short like this: aBQdd0kOvb1pNj-9XDj_C6bKWkMg9D_q

When I try to validate the request with the API, I get this error:

UnauthorizedError: jwt malformed

I know i’m getting this error because the access token isn’t a JWT.

I’m validating in the API like this:

exports.checkJwt = jwt({
    secret: jwksRsa.expressJwtSecret({
        cache: true,
        rateLimit: true,
        jwksRequestsPerMinute: 5,
        jwksUri: ''
  audience: 'ddasdsfasdfasd',
  issuer: 'safsdfasdfasdfafsdf',
  algorithms: ['RS256']

I know that accessToken needs to be transformed into a JWT on the client, BUT HOW? I have not found any documentation for this; I have also not found what other properties need to be included in the JWT for validation.

1 Like

Hi @schoenbl,

Welcome back to the Auth0 Community!

Take a look at this resource:

Hi Dan! Thanks for your response! That doesn’t seem to be working for me.

This is how I’m using the Auht0 constructor from the React Native Auth0 SDK:

import Auth0 from 'react-native-auth0';
const auth0 = new Auth0({
    audience: "",
    domain: '',
    clientId: 'LOfg18i9rCofQQadginNQVlDz8zF7PXI',

export const signInAsync = (callback) => {
        .authorize({scope: 'openid profile email'})
        .then(credentials => callback(credentials))
        .catch(err =>  callback(null, err))

When I do that, I still receive and opaque token. Should I be receiving a JWT when I do this?

Have you registered an API in the Auth0 dashboard that corresponds with that audience?



Hi Dan, thanks for the response. I really appreciate your help.

Yes, I have made the corresponding API in the Auth0 dashboard:

Any other ideas on what the issue might be?

Can you try passing the audience param to your authorize method?

authorize( {
} )
1 Like

This worked! Thank you! Should the documentation be updated?

It sounds like that would be helpful. I can’t find any references to passing the audience when you create the Auth0 object, did you see that recommended somewhere? I’d like to recommend an update.

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