Mercury›Pricing
Pricing
Pay by card — or stay keyless with a wallet on the x402 rail (/developers).
Your Mercury API key
Needed to attach the subscription (or a credit top-up) to your account. Free at /developers.
Tiers
Every upgrade raises the access fee and lowers your take-rate. Included credits refresh on every paid monthly invoice; calls are metered per-SKU (1 credit = $0.001 — a $0.005 call costs 5 credits). Same signed API + receipts on every rail.
| Tier | Per month | Included | Rate limit | Proxy take | |
|---|---|---|---|---|---|
| Sandbox | $0 | 100 credits/mo | 5/min | 10% | Get a free key |
| Pro | $29/mo | 50k credits/mo | 120/min | 8% | |
| Business | $199/mo | 1M credits/mo | 600/min | 6% | |
| Enterprise | $1500/mo | unmetered credits/mo | — | 5% |
One-time credit top-up
Out of credits mid-month? Top a live key up without changing tier — a one-time Stripe Checkout, credits land on your key when the payment settles. $1 = 1,000 credits ($5–$500).
Honest by design. Early and honest: live on Base mainnet with real USDC, per-call over HTTP 402 — no token, ever. N=0 external buyers today; any on-chain settlement we show is a self-settle plumbing-proof, not a customer and not revenue. The in-game currency and mint stay on testnet on purpose. Verify everything yourself at /trust.
Where billing stands — honestly. Subscribe returns a real Stripe Checkout session; the signature-verified webhook flips your key and grants the tier's credits, and paid renewal invoices refresh them. 0 paying customers so far — stated plainly; you would be the first. If anything does not reflect on
GET /api/dev/balance, email mercuryuser@proton.me and it will be set right.