Check if a Trello username is taken

What we check on Trello

Standard tier - checked on every full lookup

Trello is checked from a username. The response says whether that handle exists on Trello - registered: true or registered: false - with the moment that was established in checkedAt. An email address on its own cannot reach Trello; if you only have an email, its local part is tried as a handle and any hit is labelled as derived, never counted as a confirmed match.

Trello is checked on every full lookup (?wait=true or streaming), alongside every other platform. It is not in the sub-second instant subset, which is reserved for the highest-value platforms for each input type.

If Trello blocks the check, times out, or answers ambiguously, it is omitted from results[] entirely rather than returned as registered: false. Absence from the response means "unconfirmed", never "no account".

Who checks Trello accounts

Professional and work accounts are checked in hiring, B2B onboarding and vendor verification. A professional network or collaboration account tied to the email someone gives you supports the claim that they work where they say they work - with consent, and never as a background check.

More on this: Candidate email verification.

Inputs Trello accepts

• Username: send the handle as query. Trello is checked for that exact handle - useful when a person reuses the same name across platforms.

One request

curl -X POST "https://api.digifootprint.dev/v2/lookup?wait=true" \
  -H "Authorization: Bearer dfp_your_key" \
  -H "Content-Type: application/json" \
  -d '{"query": "someuser"}'

What a Trello result looks like

{
  "platform": "trello",
  "registered": true,
  "checkedAt": "2026-10-15T09:53:18.745Z",
  "identity": "username"
}

The full response shape - breaches, web mentions, matches versus socialMatches, and what method means - is in running a lookup.

Related platforms

Every one of these is checked in the same request as Trello.

Trello lookup FAQ

Can I check a phone number on Trello?

Not directly. Trello can be reached from username. Phone numbers are checked on the messaging and social apps that sign people up by phone.

How fast is a Trello check?

Trello is checked on a full lookup, which streams results as they land - the first matches arrive in around 60 milliseconds and the whole set typically completes in a few seconds.

What happens if Trello blocks the check?

Trello is left out of the response. We never report a platform we could not confirm as "not registered" - a missing platform means unconfirmed, not absent.

Does the API return the Trello account details?

No. You get whether an account exists for the input you sent, and when that was established. No profile contents, photos, followers or private data are collected or returned.