unable to re-fill form-dat

[Waseem2]

i have build a login signup and forms page using react. i have used contact api as a source of login and forms api for sending submissions to hubspot. when user fills and submit forms. i am able to see submissions in hubspots. but if user logs in again he is unable to get previous data which he filled because of which user needs to fill form again. instead correcting only the wrong entered field. if i pass property as string like city , country i am getting pre filled data. but if there are say 100 fields this method is not efficient. how can i fix this 

  const contactResponse = await axios.get(

      `https://api.hubapi.com/crm/v3/objects/contacts/${contactId}?properties=email,firstname,lastname,city,country`,

      {

        headers: {

          Authorization: `Bearer ${HUBSPOT_TOKEN}`,

          "Content-Type": "application/json",

        },

      }

    );

[suprdense · Accepted solution]

Hey @Waseem2!

HubSpot’s contact GET endpoint only returns a limited default set unless you explicitly request properties. Manually listing 100+ fields is brittle. The practical fix is to fetch the contact property list once on your server, cache it, and use that list in all contact GET calls.

Best pattern (server-side, secure, scalable):

1. Call GET /crm/v3/properties/contacts to get all property names.

2. Cache the list (Redis or in-memory) and refresh periodically.

3. Use it in GET /crm/v3/objects/contacts/{id}?properties=propA,propB,....

4. Return a simple { propertyName: value } object to your front-end for form prefill.

Pros: secure (token stays server-side), fast with caching, easy to maintain.
Cons: small setup overhead for caching and mapping.

If you use HubSpot-embedded forms, just enable Pre-populate fields with known values , no API call needed.

Checklist:

• Fetch and cache contact properties once.

• Exclude archived or sensitive fields.

• Request contacts with dynamic property CSV.

• Map response to form values on the client.
  
  Hope you found this helpful!

[Waseem2]

if i use hubspot embedded form will it across browser. i have seen that hubspot form does not pre fill data across browser. that is the reason i am using react . for my usecase i want forms to be pre filled across browsers. HubSpot’s query string can be used to prefill form data across browsers, but since you have to include all the fields you want to prefill in the URL, it’s not a good solution if you have 100 or more fields. is it possible. if there is any solutions please let me know