El Salvador government reference data
11 series, each cited to the official source it was verified against. Currency USD.
Use it from code
# Free — the full catalogue of what we hold
curl https://usaref.dev/catalog
# Any series ($0.005 per call, x402 on Base — no key, no signup)
curl https://usaref.dev/v1/sv/policy-rate
# Provenance: the fingerprint of every source cited above
curl https://usaref.dev/provenance/sv/policy-rateWhat makes this different
Every value above names the official instrument it came from and the date it takes effect, and we record when we last checked it. Where a value could not be verified against its own statute we do not publish an estimate — the series is simply absent. Where a question falls outside what we hold, the API refuses and explains, free of charge, rather than returning a number that looks right.