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POST
Quote a session before spending — free, always callable

Authorizations

Authorization
string
header
required

fn_live_… or fn_test_… — Authorization: Bearer

Headers

fn-version
string

Dated API version; defaults to the account pin. Honesty note: with one version in existence the gateway echoes any value back as effective WITHOUT validating it — validation against the known-versions set is planned, so send only real dated versions from https://docs.fiveninelabs.com/changelog

Example:

"2026-08-26"

Body

application/json
query
string
required

Response

The quote — parsed intent, planned fan-out, estimated cost, would-we-run

would_run
boolean
required

false = we would decline to spend, stated

parsed
object
planned_merchants
string[]

the domains that would be dispatched — the list, not a count, so the caller sees the aim before spending (decided 2026-08-26)

planned_dispatches
integer
estimated_usd_low
number
estimated_usd_high
number