Free opportunity preflight

See whether matching live value exists before an x402 payment request.

GET · free

/api/preflight?siren=130025265
/api/preflight?q=plomberie&department=57&source=all

Returns only aggregate match count, best fit, earliest deadline, coverage, newest source timestamp, freshness and exact purchase prices. It withholds notice IDs, titles, buyers and detailed rationale. No relevant match, no payment request.