Zapier · tool · fg-0368

Code by Zapier fails with 'Scripting payload too large' or the 250 item output limit

Scripting payload too large

Verified 2026-10-15 · Confirmed by 0 builders · Trust 50/100

Cause

Code steps run on AWS Lambda with a 6 MB cap on code plus data, and output is limited to 250 items. A fetch chain without a catch can also exit silently.

Fix

Return only the fields you need, split large arrays across steps, and await fetch inside try and catch.

Apply

try {
  const r = await fetch(url);
  const all = await r.json();
  return { ids: all.items.slice(0, 250).map(i => i.id).join(',') };
} catch (err) {
  return { error: String(err) };
}

Affects: Code by Zapier JavaScript and Python, all plans, as of 2026-10

Sources

• https://help.zapier.com/hc/en-us/articles/8495980256141-Common-Problems-with-Code-Javascript-on-Zapier

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