Three ways to pay: a free tier to get started, prepaid credits by card or crypto from any country with volume discounts, or x402 on demand, paid per call with no key.
Each tier includes monthly credits and sets your daily rate limit. Pay with card.
Renews automatically at $29 every month until you cancel. Cancel anytime with Manage Billing on your account page; cancellation takes effect at the end of the current billing period, with no partial refund. See the Terms of Service.
Renews automatically at $99 every month until you cancel. Cancel anytime with Manage Billing on your account page; cancellation takes effect at the end of the current billing period, with no partial refund. See the Terms of Service.
Every request made with your key counts toward the daily limit. GET requests (reads) are free: credits are consumed only by the POST endpoints listed under per-call costs below.
Top up your API key directly on-chain. Larger deposits unlock lower per-call rates. Paid in USDC on Ethereum, Base, Polygon, Arbitrum, Optimism, BNB Chain, Avalanche, and Solana.* No billing country, no currency conversion: USDC top-ups work the same from anywhere.
Send USDC to the platform wallet for that chain (the address depends on the chain), then call POST /v1/credits/buy with your transaction hash. The first purchase on a key, or a change of paying wallet, also carries a signature from the wallet that paid (senderSignature). Credits are added instantly after on-chain verification. Bitcoin, Tron and USDT are not accepted for purchases.
USDC on Ethereum, Base, Polygon, Arbitrum, Optimism or Avalanche: 0xee432065474D2C852700f74e3fD81e2Bcc16a3D4
USDC on BNB Chain: 0xAd982CB19aCCa2923Df8F687C0614a7700255a23
USDC on Solana: 8fyEGM5tRjMocKQWaVXyM2XvvnTxR3sWdrYtug2zeLX4
*Crypto sent on unsupported chains or to the wrong address cannot be recovered.
All crypto credit purchases are final and non-refundable.
Built for agents. Send a request with no credentials and the API answers with an x402 quote. Pay in USDC on Base, Polygon, Arbitrum, Arc, or Solana, retry, and the attestation comes back with settlement on-chain. No signup, no key, no credit balance to manage. Every condition type is on this rail, including agent standing (ERC-8004 registration and ERC-7710 delegation validity).
Standard x402 protocol, USDC on Base, Polygon, Arbitrum, Arc, or Solana, gasless for the payer. x402 moves the money. InsumerAPI checks the conditions. Prepaid credits stay cheaper at volume; pay per call is the zero-setup path. Details in the authentication reference.
Credits are consumed by POST endpoints that perform on-chain verification. Dollar amounts shown at the base rate ($0.04/credit).
| Endpoint | Credits | Base Cost | At $500+ Rate |
|---|---|---|---|
| POST /v1/attest | 1 | $0.04 | $0.02 |
| POST /v1/attest (Merkle proof) | 2 | $0.08 | $0.04 |
| POST /v1/trust | 3 | $0.12 | $0.06 |
| POST /v1/trust (Merkle proof) | 6 | $0.24 | $0.12 |
| POST /v1/trust/batch (per wallet) | 3 | $0.12 | $0.06 |
| POST /v1/verify, ACP, UCP (per code with a discount) | 1* | $0.04 | $0.02 |
* A code that carries a discount is paid with one credit from the API key that owns the store (the key that created it); a 0% result is free. A caller using another key is not charged. NFC taps cost the same, and every in-store scan costs one credit. Running a store, club or community? Skye Meta runs recognition at the counter, online and at the door on InsumerAPI, under its own license, and its stores are covered by that license.
Credits belong to your API key. Consumed by attestation and trust endpoints. POST /v1/keys/create (email signup) ships 10 free verifications plus 100 requests a day. POST /v1/keys/buy (on-chain, sender wallet is the identity, no email) ships the credits you paid for. Top up via subscription tier or POST /v1/credits/buy.
A store has no balance of its own. A discount code (verify, ACP, UCP) or NFC tap that carries a discount uses one credit from the API key that created the store; a 0% result is free. Every in-store scan uses one credit from that key. A caller using another key is not charged; if you call with your own store's key, your key pays. Top up the same way, with POST /v1/credits/buy.