Push enriched lead rows into an existing Instantly or Smartlead campaign. Maps common Clay column names onto each sequencer's own field names, optionally drops leads below a minimum ICP score, optionally deduplicates against the leads already in the destination campaign, and sends the rest in batches. Returns one flat summary row: how many leads were received, dropped for having no usable email, dropped by the ICP gate, dropped as duplicates, eligible, actually created by the sequencer, skipped by the sequencer, and failed, plus the vendor's own error message per failed address. The campaign must already exist; this does not create campaigns or write sequence copy. Set dry_run true to get back the exact request payload that would be sent without creating a single lead and without being charged, which is the safe way to check a mapping against a new campaign. Billing is per lead the sequencer confirms it created, so gated, duplicate, skipped, failed and dry-run leads are all free. Instantly uses API v2 and needs a v2 key; Smartlead uses API v1. Requires an APIFY_TOKEN and consumes Apify credits. This WRITES to your sequencer campaign unless dry_run is true.