Sato Hub
x402 merchant

presign-guard.fizzl.eu

Security API on Algorand, paid per request with x402.

  • Endpoints8
  • Price per requestn/a
  • Outside payersn/a
  • Answer 4021 of 1

Overview

as of 2026-10-09
Seller wallet
LOYVFSQ6ZTS2YWUW4GQ5L6VPP2TPIOXWYDACK53CPOHQQHLDMEMKJDXAX4
Chains
Algorand
Hosts
ichimoku-signal.fizzl.eu, presign-guard.fizzl.eu, x402-doctor.fizzl.eu
CategoriesCategoriesAssigned automatically from the seller’s own listing text. A filter hint, not a claim about the service.
Security4Developer tools2Market data1Onchain data1
First seen
2026-10-08 · last seen 2026-10-09

What we observed

Payments unknown, unknownAnswers 402, observedNot claimed
See the readings

Endpoints

EndpointsDescriptions are the seller's own words from the catalogue and are not checked by us. A listed price is a registration, not an observed charge.
8 registered

  • https://ichimoku-signal.fizzl.eu/scan

    Market scan: the Ichimoku Cloud signal for 148 top-200 coins in one call, sorted from strongest bullish to strongest bearish (distance from the cloud), with market breadth ("69 of 147 coins bullish"). Any interval from …

    AlgorandMarket data

    n/a/ request

    2026-10-08

  • https://presign-guard.fizzl.eu/v1/approvals

    Wallet approval audit (green/orange/red, grade, one-line summary): every open ERC-20 allowance of an EVM wallet with who the spender is (flagged, plain wallet, unverified, unlimited) and which ones to revoke. Bulk: 100 …

    AlgorandOnchain data

    n/a/ request

    2026-10-08

  • https://presign-guard.fizzl.eu/v1/check

    Is this transaction, approval or signature safe to sign? Check it before your AI agent or wallet signs it: pre-sign verdict (green/orange/red + reason codes) for EVM transactions, token approvals and Permit/Permit2/EIP-…

    AlgorandSecurity

    n/a/ request

    2026-10-08

  • https://presign-guard.fizzl.eu/v1/check/explain

    Is this transaction, approval or signature safe to sign, explained for a person? The same pre-sign verdict as /v1/check (green/orange/red + reason codes) plus a short plain-language explanation in English or Dutch, for …

    AlgorandSecurity

    n/a/ request

    2026-10-08

  • https://presign-guard.fizzl.eu/v1/token

    Is this token safe to buy, or a honeypot or rug pull? Checks a Solana or EVM token before you buy, hold or accept it (mint or freeze authority still active, LP not locked, buy/sell tax, low liquidity, brand-new token, c…

    AlgorandSecurity

    n/a/ request

    2026-10-08

  • https://x402-doctor.fizzl.eu/api/v1/diagnose

    Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readin…

    AlgorandDeveloper tools

    n/a/ request

    2026-10-08

  • https://x402-doctor.fizzl.eu/api/v1/fix

    How do I fix my broken x402 endpoint? Diagnoses it, then returns per problem the concrete change as code for your stack (Express, Next.js, Hono or raw HTTP), filled in with your own payTo, amount, network and route. Bul…

    AlgorandDeveloper tools

    n/a/ request

    2026-10-08

  • https://x402-doctor.fizzl.eu/api/v1/preflight

    Is this x402 endpoint safe to pay? Call it before your AI agent pays an endpoint it has not used before. Returns a go / caution / no_go verdict, the recommended payment option (network and amount) and the reasons (payme…

    AlgorandSecurity

    n/a/ request

    2026-10-08

Evidence

as of 2026-10-09

Answers HTTP 402

Answers HTTP 402Method: one unpaid request per listed endpoint. A 402 with a payment payload a client could parse counts. Nothing is paid.

1 of 1

1 of 1 probed endpoints answered HTTP 402 with a parseable payment payload

checked 2026-09-28

x402-style payments, last 7 days (Base)

x402-style paymentsMethod: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's exact scheme uses. Some non-x402 gasless sends use it too.

unknown

unknown. not measured on this chain yet

no reading date

By chain

ChainSeller walletEndpointsAnswers 402x402-style payments
AlgorandLOYVFSQ6ZTS2YWUW4GQ5L6VPP2TPIOXWYDACK53CPOHQQHLDMEMKJDXAX481 of 1 probed endpoints answered HTTP 402 with a parseable payment payload
2026-09-28
unknown. not measured on this chain yet

One seller wallet, each chain read on its own. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.

Pricing

Lowest
n/a
per request, as registeredas of
Median
n/a
per request, as registeredas of
Highest
n/a
per request, as registeredas of

Unknown. Prices are decoded only for USDC on Base and Solana.

Claim this merchant

Sign a message from the payout address LOYVFSQ6…JDXAX4 to claim this page. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.

The payment ledger covers Base only for now, so it is not offered for Algorand.

Data CC-BY-4.0, attribution: data by satohub.ai. Data as of 2026-10-09. Appearing here is not an endorsement. Check an endpoint with the doctor.