Agentflow v2 and API vars

[fpmirabile]

Hi Flowise team!

I’m working on a use case that involves sending sensitive data via the API, specifically for tools like Calendar, Drive, etc., to function per user. In my scenario, I want to pass the bearer token manually into a semi-configured tool (only clientId and clientSecret set), then provide the access_token programmatically.

In my code, I’ve implemented something like this:

const overrideAccessToken = nodeData.inputs?.vars?.access_token || nodeData.inputs?.access_token
if (overrideAccessToken) {
    accessToken = overrideAccessToken
} else {
    let credentialData = await getCredentialData(nodeData.credential ?? '', options)
    credentialData = await refreshOAuth2Token(nodeData.credential ?? '', credentialData, options)
    accessToken = getCredentialParam('access_token', credentialData, nodeData)
}

This works perfectly in Chatflow.

However, I noticed that in Agentflow, this same override doesn’t work when using tools within agent nodes. After some debugging, I found that the variables weren't being passed through correctly.

Looking into the agent node code, I realized that the construction of newNodeData was missing the vars. So I added the following line:

const newNodeData = {
    ...nodeData,
    credential: toolConfig['FLOWISE_CREDENTIAL_ID'],
    inputs: {
        ...nodeData.inputs,
        ...toolConfig,
        ++ ...(nodeData.inputs?.vars || {}) // <== this is the line I added
    }
}

Adding that line fixed the issue.

It seems like toolConfig is sending an empty vars object, which is likely why it wasn’t working. My question is:
Is this the expected behavior in Flowise for Agentflow, or is this an unintended omission?

Thanks for the amazing work — Flowise has been a huge help in building workflows! 🙌