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/evm/optimism/nonce/:address EVM Nonce (optimism). Optimism account nonce: confirmed and pending transaction count for any address. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/optimism/nonce/:address EVM Nonce (optimism). Optimism account nonce: confirmed and pending transaction count for any address. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/optimism/storage/:address/0 Contract Storage Slot (optimism). Optimism 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/optimism/storage/:address/0 Contract Storage Slot (optimism). Optimism 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/optimism/transfers/:address Token Transfer History (optimism). Optimism 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/optimism/transfers/:address Token Transfer History (optimism). Optimism 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/optimism/tx/:hash EVM Transaction Details (optimism). Optimism 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/optimism/tx/:hash EVM Transaction Details (optimism). Optimism 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/polygon/allowance/:address/:address2/:address3 ERC-20 Allowance (polygon). Polygon 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/polygon/allowance/:address/:address2/:address3 ERC-20 Allowance (polygon). Polygon 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/polygon/balance/:address EVM Wallet Balances (polygon). Polygon ERC-20 token balance and native POL 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/polygon/balance/:address EVM Wallet Balances (polygon). Polygon ERC-20 token balance and native POL 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/polygon/call/:address Read-Only Contract Call (eth_call) (polygon). Polygon 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/polygon/call/:address Read-Only Contract Call (eth_call) (polygon). Polygon 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/polygon/contract/:address EVM Contract Introspection (polygon). Polygon contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 and legacy OpenZeppelin slots) and ERC-20 name, symbol, deci… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/polygon/contract/:address EVM Contract Introspection (polygon). Polygon contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 and legacy OpenZeppelin slots) and ERC-20 name, symbol, deci… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/polygon/events/:address Contract Event Logs (polygon). Polygon 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/polygon/events/:address Contract Event Logs (polygon). Polygon 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/polygon/nonce/:address EVM Nonce (polygon). Polygon PoS 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 o… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/polygon/nonce/:address EVM Nonce (polygon). Polygon PoS 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 o… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/polygon/storage/:address/0 Contract Storage Slot (polygon). Polygon 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/polygon/storage/:address/0 Contract Storage Slot (polygon). Polygon 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/polygon/transfers/:address Token Transfer History (polygon). Polygon 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… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/polygon/transfers/:address Token Transfer History (polygon). Polygon 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… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/evm/polygon/tx/:hash EVM Transaction Details (polygon). Polygon 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/polygon/tx/:hash EVM Transaction Details (polygon). Polygon 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/games/deals PC Game Deals Across Stores (Steam, GOG, Epic...) — Games | Arbitrum | Commerce | unknown | 2026-10-05 |
https://saylorinnovations.com/api/games/deals PC Game Deals Across Stores (Steam, GOG, Epic...) — Games | Polygon | Commerce | unknown | 2026-10-05 |
https://saylorinnovations.com/api/genetics/gene/:symbol Gene Reference: function and related conditions (MedlinePlus Genetics). Gene reference from MedlinePlus Genetics (NLM): full name, normal function and related health conditions. | Polygon | Other | unknown | 2026-09-25 |
https://saylorinnovations.com/api/genetics/gene/:symbol Gene Reference: function and related conditions (MedlinePlus Genetics). Gene reference from MedlinePlus Genetics (NLM): full name, normal function and related health conditions. | Arbitrum | Other | unknown | 2026-09-25 |
https://saylorinnovations.com/api/hcpcs/:code HCPCS Level II Code Lookup (CMS). HCPCS Level II medical billing code lookup (CMS), e.g. E0601 or J1100: short and long description, code category (DME, drugs, supplies, ambulance, orthotics), added / effective / termin… | Arbitrum | Other | unknown | 2026-09-25 |
https://saylorinnovations.com/api/hcpcs/:code HCPCS Level II Code Lookup (CMS). HCPCS Level II medical billing code lookup (CMS), e.g. E0601 or J1100: short and long description, code category (DME, drugs, supplies, ambulance, orthotics), added / effective / termin… | Polygon | Other | unknown | 2026-09-25 |
https://saylorinnovations.com/api/history/:solana_address Price History (OHLCV). OHLCV price history (day/hour/minute candles) from the highest-liquidity pool for this mint. The only time-series endpoint here — every other route is a point-in-time snapshot. | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/history/:solana_address Price History (OHLCV). OHLCV price history (day/hour/minute candles) from the highest-liquidity pool for this mint. The only time-series endpoint here — every other route is a point-in-time snapshot. | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/holders/:mint Holder Breakdown. Check holder concentration for a Solana token: top 20 holders by balance with percent of supply, RugCheck's insider label per wallet, and the rolled-up top-10 share — spot whale, team and insider conce… | Arbitrum | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/holders/:mint Holder Breakdown. Check holder concentration for a Solana token: top 20 holders by balance with percent of supply, RugCheck's insider label per wallet, and the rolled-up top-10 share — spot whale, team and insider conce… | Polygon | Onchain data | unknown | 2026-09-25 |
https://saylorinnovations.com/api/ip/:address IP Address Lookup (owner, country, range, abuse contact). IP address lookup from the regional internet registries (RDAP): network name and owner organization, country, address range and CIDR, abuse contact email, regist… | Polygon | Identity | unknown | 2026-09-25 |
https://saylorinnovations.com/api/ip/:address IP Address Lookup (owner, country, range, abuse contact). IP address lookup from the regional internet registries (RDAP): network name and owner organization, country, address range and CIDR, abuse contact email, regist… | Arbitrum | Identity | unknown | 2026-09-25 |
https://saylorinnovations.com/api/kb/accessibility-remediation Accessibility Remediation Guide — Web & Domains | Arbitrum | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/accessibility-remediation Accessibility Remediation Guide — Web & Domains | Polygon | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-capability-registry Agent Capability Registry and Discovery — AI & Agents | Polygon | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-capability-registry Agent Capability Registry and Discovery — AI & Agents | Arbitrum | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-cost-latency-budget Agent Cost, Latency, and Quality Budgeting — AI & Agents | Polygon | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-cost-latency-budget Agent Cost, Latency, and Quality Budgeting — AI & Agents | Arbitrum | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-evaluation-tests Agent Evaluation-Test Generator — AI & Agents | Polygon | Developer tools | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-evaluation-tests Agent Evaluation-Test Generator — AI & Agents | Arbitrum | Developer tools | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-memory-integrity Agent Memory and State Integrity — AI & Agents | Arbitrum | Agents | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-memory-integrity Agent Memory and State Integrity — AI & Agents | Polygon | Agents | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-observability Agent Observability Guide — AI & Agents | Polygon | Other | unknown | 2026-10-05 |
https://saylorinnovations.com/api/kb/agent-observability Agent Observability Guide — AI & Agents | Arbitrum | Other | unknown | 2026-10-05 |
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.