Development · API keys

API keys

No account needed. Start with the free sandbox key below, then pay once to go live — your live key is issued at checkout.

Sandbox test key

A published, shared key for trying every endpoint against real data — no signup, no payment. It is rate-limited and returns a small capped slice, so it's for evaluation, not production.

fd_sandbox_public_key_2026

Send it as Authorization: Bearer <key>.

Go live

A one-time payment unlocks the full, uncapped API. Your live key is revealed once at checkout — no account required, so store it somewhere safe. Get API access →

Already have a key and need to replace it? See Rotate keys.