Pay for what your agent ships.

The Metered tier bills three things separately. A send is one outbound email your agent dispatches through the API ($0.001 each). An inbound reply is one message delivered to one of your agents — includes parse to a structured payload, injection scan, sender-reputation lookup, and webhook delivery ($0.002 each). An optional classify step extracts intent + entities + urgency via our 2-call classifier (+$0.003 per inbound, opt-in per agent).

The split-rate matters: if your agent already runs an LLM on every reply, leave classification off and don't pay for work you're doing twice. If you want fast routing (switch (reply.intent)with no extra LLM call), turn it on and we'll do the extraction once for you.

On the Free tier, you hit a hard cap at 3,000 events per month (send + inbound combined). Paid tiers send a usage warning at 80% and let you finish the billing cycle without mid-month cutoffs.

All billing runs through Stripe. Monthly plans bill in advance with no annual commitments required. The Metered tier uses Stripe metered billing — each dimension (send / inbound / classify) is its own Subscription Item with its own usage record.

Your agent's email rides a managed sending layer with a documented multi-vendor failover runbook and a ~4‑hour DNS swap path, so a single provider outage doesn't take your agent offline. The full provider architecture is documented on the architecture page.

Every outbound email runs through a behavioral classifier before it leaves our system — rules plus a lightweight LLM call. Senders matching cold-prospecting patterns get auto-throttled to 50/day on shared IPs until reputation builds. No bans, no manual review, no account suspensions for borderline behavior. The classifier is invisible to your code — it's deliverability infrastructure, not a product axis you have to choose between.

A per-sender cron monitors complaint and bounce rates every 15 minutes. Any sender crossing 0.3% complaint rate gets paused before the upstream provider flags it at 0.5%. Your agent's deliverability isn't affected by someone else's behavior on the network. For high-volume senders that want reputation completely isolated from the shared pool, the Dedicated IP add-on ($50/mo) is available on request (Scale+) — provisioned per request, with ~14-day warmup.