Pricing
Checking receipts costs nothing, for anyone, forever. You pay to create records. Nobody pays to check them. If a price on this page ever fights the free-verification promise, the price loses.
Start free
Free tier: 100 API calls per UTC day, 1 signed mint per UTC day, no card required.
Of those calls, claim-verification is separately capped — 10 claim-verification calls per UTC day, one shared allowance across the /verify/claim door and its batch form. The 10 claim-verification calls/day inner meter applies only to the REST /verify endpoints, never to MCP tool calls.
Enough to wire the API into your agent, put a real action on the record, and check every link of the chain yourself. When your agents outgrow it, the ladder and the four plans below are the whole public price list.
Get a free API keyVerification is always free.
That is a principle, not a promotion: receipts are only worth anything if the person you hand one to can check it without paying us — or telling us. Anyone holding a receipt can verify it against our published keys, with no account, tomorrow or years from now. If a price on this page ever fights the free-verification promise, the price loses. Run the check yourself.
Two different acts share the word "verify." Checking a receipt — recomputing its hashes and its signature against our published keys — is free, keyless, and needs no account, forever. Asking us to verify a claim is different work: an LLM-backed check against reference data, which mints a receipt of its own. The first is never metered. The second is one of the priced doors.
Two rails carry a price here: the mint — writing a signed receipt onto the record — and the priced doors an agent can pay at without an account. The posted rates step down with monthly volume; today the lower rungs are arranged through us, not applied automatically.
Per-mint rates
| Monthly volume band | Posted rate |
|---|---|
| Your first 100 paid mints in a calendar month (UTC) | $0.01 per mint |
| Mints 101 through 1,000 that month | $0.005 per mint |
| Every mint past 1,000 that month | $0.002 per mint |
Rates are marginal and the month is a calendar month, UTC: each mint is priced at its own rung, and crossing a threshold never re-prices the mints before it. The ladder prices paid mints only, and nothing re-prices automatically today: keyless door mints are billed at the door's own quote — the base rung today — and the lower rungs apply to volume arrangements set up through support@bluefoxedge.ai. Past the ladder — sustained volume, enterprise terms, invoicing — the same address is the door. The posted rates are the rates.
Monthly plans
Which rail bills you depends on how you arrive. With an API key, your plan is your bill — the sentence below says which meter that is. Without a key, you pay at the door, per request, at the posted rate it quotes. The per-mint rates above price mints at the door and mints under a volume arrangement; they are not added on top of a plan.
| Plan | Monthly | Included API calls |
|---|---|---|
| free | $0 USD/month | 100 API calls per UTC day |
| starter | $29 USD/month | 10,000 API calls per UTC day |
| pro | $99 USD/month | 100,000 API calls per UTC day |
| enterprise | $299 USD/month | 999,999 API calls per UTC day |
The three paid plans open with card billing, and this page will carry the date. The doors open today: the free tier, x402 pay-at-the-door for agents, and support@bluefoxedge.ai for a volume arrangement at the lower rungs.
Paid plans include signed mints — your plan's daily call limit is the only meter.
The largest plan — enterprise — is the biggest self-serve rung, not a contracting motion. For an order form, an MSA, invoicing or a procurement questionnaire, the door below is the path.
x402 — pay at the door. No account needed.
Agents that arrive holding a wallet instead of a login pay per request over an open machine-payment protocol: USDC on Base mainnet (base — chain id 8453). No API key. No billing setup. No human in the loop.
The keyless doors are listed at bluefoxedge.ai/.well-known/x402 — that listing is the whole keyless set, and the other priced endpoints need an API key: call one of those without a key and the answer is 401, not a quote. Call a door from the listing without a key and the 402 response is the quote: the amount in atomic USDC units, the token contract, the network, and the recipient. Your agent reads the terms, pays, and leaves with the same signed receipt as anyone else. The example on the right is a mint — present a digest of your artifact at the notarize door, pay the quote, and the signed receipt comes back in the response.
The door quotes the base rate. Today the keyless door quotes $0.01 per mint — the base rung above. The live quote is authoritative: if this page and the door ever disagree, believe the door.
Other doors quote other rates. Across the listed doors, per-call prices run from $0.0005 to $0.12 in USDC; each door states its own exact terms in its own 402. The full list is at bluefoxedge.ai/.well-known/x402.
curl -s -X POST https://api.bluefoxedge.ai/v1/notarize/hash \
-H "Content-Type: application/json" \
-d '{"hash": "<sha256 hex digest of your artifact>"}'
HTTP/1.1 402 Payment Required
Content-Type: application/json
X-Payment-Required: true
X-Payment-Protocol: x402
X-Payment-Network: base
X-Payment-Asset: <USDC token contract>
X-Payment-Amount: <atomic USDC units>
X-Payment-Recipient: <BlueFox payout address>
{ "x402Version": 1,
"error": "Payment required — this response is the quote. ...",
"accepts": [ { "network": "base",
"maxAmountRequired": "<atomic USDC units>",
"asset": "<USDC token contract>",
"payTo": "<BlueFox payout address>",
"outputSchema": { ... } } ] }Abridged — the live response carries the full quote in both surfaces shown above: the X-Payment-* headers and the x402 JSON body, whose accepts entry also names the scheme, the resource, a description, and the response schema. The live 402 is the contract; this sketch just shows where to look.
Past the ladder
Sustained volume, enterprise terms, procurement questionnaires, invoicing: support@bluefoxedge.ai reaches a human. No tiers to decode first — everything with a price is on this page or at the door: the ladder, the monthly plans, and the keyless doors listed at /.well-known/x402. There is no fourth price list.
What has a price
Two rails, and they price different things.
The mint is the priced act on this page: writing a signed receipt onto the record, at the posted rates above.
Some verification calls are also payable at the door. An LLM-backed check of a claim costs real compute, and each door in the keyless listing quotes its own price in its own 402 response — keylessly, per request. The doors you can pay at are published, all of them, at bluefoxedge.ai/.well-known/x402 (29 today) — that listing is the whole keyless set, and the few priced endpoints outside it require an API key instead. The live quote is authoritative.
Checking a receipt you already hold is on neither rail. It is free, for anyone, forever.