saylorinnovations.com
Base, Arbitrum, Polygon · payout 0xa2a8df0f7caabea4e120a2568118f141569fc8aa
Answers HTTP 402
9 of 9 probed endpoints answered HTTP 402 with a parseable payment payload
checked 2026-10-05
Method: one unpaid request per listed endpoint. A 402 with a payment payload a client could parse counts. Nothing is paid.
x402-style payments, last 7 days (Base)
58 x402-style payments from 8 distinct payers, $0.13 USDC in the last 7 days (Base, exact read)
window ended 2026-10-05
- Payments
- 58
- Outside payers
- 8
- USDC
- 0.13
All USDC received at this payout address: $0.13 (includes payments that are not x402)
Method: 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.
Reading: x402-style payments to this payout address on Base, exact read of the 7 days to 2026-10-05, every block of the window: 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; Sato Hub's own payer wallets are left out
Delivery is not measured. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.
Chains · one payout address, each chain read on its own
| Chain | Payout address | Listings | Answers 402 | x402-style payments |
|---|---|---|---|---|
| Base | 0xa2a8df0f7caabea4e120a2568118f141569fc8aa | 162 | 3 of 3 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-05 | 58 x402-style payments from 8 distinct payers, $0.13 USDC in the last 7 days (Base, exact read) |
| Arbitrum | 0xa2a8df0f7caabea4e120a2568118f141569fc8aa | 162 | 3 of 3 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-05 | unknown. not measured on this chain yet |
| Polygon | 0xa2a8df0f7caabea4e120a2568118f141569fc8aa | 162 | 3 of 3 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-05 | unknown. not measured on this chain yet |
- Hosts
- saylorinnovations.com
- Listings
- 486 registered in the x402 catalogue
- Price range
- $0.0010 to $0.010 per call, as registered
- Categories (auto)
- Onchain data (204), Other (129), Developer tools (57), Market data (33), Identity (21), Security (12), Commerce (9), Media (6), Web data (6), Agents (3), Inference (3), Search (3)
- First seen
- 2026-10-05 · last seen 2026-10-05
Claim this merchant
Sign a message from the payout address 0xa2a8df…9fc8aa to claim this page or download its payment ledger. 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.
Registrations · 486
| Endpoint | Chain | Category | Price | Catalogue date |
|---|---|---|---|---|
https://saylorinnovations.com/api/docs/go/github.com/gin-gonic/gin Library Docs — go github.com/gin-gonic/gin — Developer Tools | Arbitrum | Developer tools | unknown | 2026-10-05 |
https://saylorinnovations.com/api/docs/go/github.com/gin-gonic/gin Library Docs — go github.com/gin-gonic/gin — Developer Tools | Polygon | Developer tools | unknown | 2026-10-05 |
https://saylorinnovations.com/api/docs/npm/zod Library Docs — npm zod — Developer Tools | Arbitrum | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/docs/npm/zod Library Docs — npm zod — Developer Tools | Polygon | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/docs/pypi/fastapi Library Docs — pypi fastapi — Developer Tools | Arbitrum | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/docs/pypi/fastapi Library Docs — pypi fastapi — Developer Tools | Polygon | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/elements/:element Periodic Table Element Data. Periodic table element data by symbol, name or atomic number: atomic mass, group, state, electron configuration, electronegativity, radius, ionization energy, oxidation states, melting and b… | Arbitrum | Other | unknown | 2026-09-25 |
https://saylorinnovations.com/api/elements/:element Periodic Table Element Data. Periodic table element data by symbol, name or atomic number: atomic mass, group, state, electron configuration, electronegativity, radius, ionization energy, oxidation states, melting and b… | Polygon | Other | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/allowance/:address/:address2/:address3 ERC-20 Allowance (arbitrum). Arbitrum ERC-20 allowance: how much a spender may move from an owner, human-readable, with an unlimited-approval flag. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/allowance/:address/:address2/:address3 ERC-20 Allowance (arbitrum). Arbitrum ERC-20 allowance: how much a spender may move from an owner, human-readable, with an unlimited-approval flag. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/balance/:address EVM Wallet Balances (arbitrum). Arbitrum ERC-20 token balance and native ETH balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/balance/:address EVM Wallet Balances (arbitrum). Arbitrum ERC-20 token balance and native ETH balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/call/:address Read-Only Contract Call (eth_call) (arbitrum). Arbitrum read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/call/:address Read-Only Contract Call (eth_call) (arbitrum). Arbitrum read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/contract/:address EVM Contract Introspection (arbitrum). Arbitrum contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 and legacy OpenZeppelin slots) and ERC-20 name, symbol, de… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/contract/:address EVM Contract Introspection (arbitrum). Arbitrum contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 and legacy OpenZeppelin slots) and ERC-20 name, symbol, de… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/events/:address Contract Event Logs (arbitrum). Arbitrum contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/events/:address Contract Event Logs (arbitrum). Arbitrum contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/nonce/:address EVM Nonce (arbitrum). Arbitrum account nonce: confirmed and pending transaction count for any address. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/nonce/:address EVM Nonce (arbitrum). Arbitrum account nonce: confirmed and pending transaction count for any address. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/storage/:address/0 Contract Storage Slot (arbitrum). Arbitrum contract storage slot read: raw 32-byte value plus uint and address decodings. | Arbitrum | Developer tools | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/storage/:address/0 Contract Storage Slot (arbitrum). Arbitrum contract storage slot read: raw 32-byte value plus uint and address decodings. | Polygon | Developer tools | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/transfers/:address Token Transfer History (arbitrum). Arbitrum token transfer history: ERC-20 and ERC-721 Transfer events for a token, filtered to one wallet (?wallet=, in/out labelled, up to 2,000 blocks) or the latest 20 blocks unfilter… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/transfers/:address Token Transfer History (arbitrum). Arbitrum token transfer history: ERC-20 and ERC-721 Transfer events for a token, filtered to one wallet (?wallet=, in/out labelled, up to 2,000 blocks) or the latest 20 blocks unfilter… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/tx/:hash EVM Transaction Details (arbitrum). Arbitrum transaction details: status, from/to, value, block, nonce, gas used, total fee (incl. L1 data fee on OP-stack chains), event count and method selector. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/arbitrum/tx/:hash EVM Transaction Details (arbitrum). Arbitrum transaction details: status, from/to, value, block, nonce, gas used, total fee (incl. L1 data fee on OP-stack chains), event count and method selector. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/allowance/:address/:address2/:address3 ERC-20 Allowance (base). Base ERC-20 allowance: how much a spender may move from an owner, human-readable, with an unlimited-approval flag. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/allowance/:address/:address2/:address3 ERC-20 Allowance (base). Base ERC-20 allowance: how much a spender may move from an owner, human-readable, with an unlimited-approval flag. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/balance/:address EVM Wallet Balances (base). Base ERC-20 token balance and native ETH balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/balance/:address EVM Wallet Balances (base). Base ERC-20 token balance and native ETH balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/call/:address Read-Only Contract Call (eth_call) (base). Base read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/call/:address Read-Only Contract Call (eth_call) (base). Base read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/contract/:address EVM Contract Introspection (base). Base contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 implementation/admin/beacon and legacy OpenZeppelin slots) and ERC… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/contract/:address EVM Contract Introspection (base). Base contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 implementation/admin/beacon and legacy OpenZeppelin slots) and ERC… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/events/:address Contract Event Logs (base). Base contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/events/:address Contract Event Logs (base). Base contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/nonce/:address EVM Nonce (base). Base account nonce for any address: confirmed nonce and pending nonce (a gap means transactions are still waiting in the mempool). Use it before sending a transaction or to detect a pending one. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/nonce/:address EVM Nonce (base). Base account nonce for any address: confirmed nonce and pending nonce (a gap means transactions are still waiting in the mempool). Use it before sending a transaction or to detect a pending one. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/storage/:address/0 Contract Storage Slot (base). Base contract storage slot read: raw 32-byte value plus uint and address decodings. | Polygon | Developer tools | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/storage/:address/0 Contract Storage Slot (base). Base contract storage slot read: raw 32-byte value plus uint and address decodings. | Arbitrum | Developer tools | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/transfers/:address Token Transfer History (base). Base token transfer history: ERC-20 and ERC-721 Transfer events for a token, filtered to one wallet (?wallet=, in/out labelled, up to 2,000 blocks) or the latest 20 blocks unfiltered. Deco… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/transfers/:address Token Transfer History (base). Base token transfer history: ERC-20 and ERC-721 Transfer events for a token, filtered to one wallet (?wallet=, in/out labelled, up to 2,000 blocks) or the latest 20 blocks unfiltered. Deco… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/tx/:hash EVM Transaction Details (base). Base transaction details: status, from/to, value, block, nonce, gas used, total fee including the L1 data fee, event count and method selector. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/base/tx/:hash EVM Transaction Details (base). Base transaction details: status, from/to, value, block, nonce, gas used, total fee including the L1 data fee, event count and method selector. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/allowance/:address/:address2/:address3 ERC-20 Allowance (bsc). BNB Chain (BSC) BEP-20 token allowance: how much a spender contract (router, bridge, DEX) may move from an owner wallet, in raw and decimal units, with an unlimited-approval risk flag. Use it to … | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/allowance/:address/:address2/:address3 ERC-20 Allowance (bsc). BNB Chain (BSC) BEP-20 token allowance: how much a spender contract (router, bridge, DEX) may move from an owner wallet, in raw and decimal units, with an unlimited-approval risk flag. Use it to … | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/balance/:address EVM Wallet Balances (bsc). BNB Chain ERC-20 token balance and native BNB balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/balance/:address EVM Wallet Balances (bsc). BNB Chain ERC-20 token balance and native BNB balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/call/:address Read-Only Contract Call (eth_call) (bsc). BNB Chain (BSC) read-only contract call (eth_call) with any calldata: the raw 32-byte return data, with reverts reported cleanly (reverted flag, error and revert data) instead o… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/call/:address Read-Only Contract Call (eth_call) (bsc). BNB Chain (BSC) read-only contract call (eth_call) with any calldata: the raw 32-byte return data, with reverts reported cleanly (reverted flag, error and revert data) instead o… | Arbitrum | Onchain data | unknown | 2026-09-25 |
Descriptions 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.
Data CC-BY-4.0, attribution: data by satohub.ai. Collector run 2026-10-05. Appearing here is not an endorsement. Check an endpoint with the doctor.