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/stocks/quote/:symbol Stock Quote — MU — Stock Market Data | Base | Market data | $0.002 | 2026-10-02 |
https://saylorinnovations.com/api/web/domain/:domain Domain Intelligence — registration, age, DNS, availability, risk flags. Domain intelligence and availability check: registered or available, creation date and age in days, expiry, registrar, status locks, DNSSEC, namese… | Base | Identity | $0.002 | 2026-09-25 |
https://saylorinnovations.com/api/bio/protein/:id Protein Function Lookup (UniProt). Protein function lookup by UniProt accession or gene symbol (TP53, BRCA1; human default, ?organism= taxon for others): recommended name, function, subcellular location, tissue specific… | Base | Other | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/bio/rare-disease/:id Rare Disease Reference (Orphanet). Rare disease reference from Orphanet by name or ORPHAcode: definition, synonyms, ICD-10 / ICD-11 / OMIM / UMLS / MeSH codes, inheritance, age of onset, prevalence estimates, and clinic… | Base | Other | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/bio/variant/:id Genetic Variant Clinical Significance (ClinVar). Genetic variant clinical significance from ClinVar by rsID, ClinVar id (VCV) or HGVS: pathogenic / benign / uncertain classification, review status with 0-4 stars, condit… | Base | Other | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/data/country Resolve a two-letter country code into its World Bank name, region, capital, income group and lending classification for data enrichment. | Base | Identity | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/data/economy Get up to five recent annual observations for population, GDP in current US dollars and consumer-price inflation. Includes years, units, source links and missing values. | Base | Market data | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/data/exchange-rates Get daily reference exchange rates per one unit of a base currency, with observation date and currency codes. Not executable trading quotes. ECB source data is also available free from ecb.europa.eu. | Base | Market data | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/defi/protocol/:slug DeFi Protocol TVL. DeFi protocol TVL: total value locked, 1-day and 7-day change, per-chain TVL with borrowed and staked amounts, category, market cap and audit count for any DefiLlama protocol slug. | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/docs/crates/serde Library Docs — crates serde — Developer Tools | Base | Other | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/docs/github/colinhacks/zod Library Docs — github colinhacks/zod — Developer Tools | Base | Developer tools | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/docs/go/github.com/gin-gonic/gin Library Docs — go github.com/gin-gonic/gin — Developer Tools | Base | Developer tools | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/docs/npm/zod Library Docs — npm zod — Developer Tools | Base | Other | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/docs/pypi/fastapi Library Docs — pypi fastapi — Developer Tools | Base | Other | $0.003 | 2026-10-05 |
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. | Base | Onchain data | $0.003 | 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. | Base | Onchain data | $0.003 | 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… | Base | Onchain data | $0.003 | 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. | Base | Onchain data | $0.003 | 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. | Base | Onchain data | $0.003 | 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… | Base | Onchain data | $0.003 | 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. | Base | Onchain data | $0.003 | 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… | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/contract/:address EVM Contract Introspection (bsc). BNB Chain contract introspection: contract vs wallet, bytecode size, proxy detection and BEP-20 name, symbol, decimals, total supply. | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/balance/:address EVM Wallet Balances (ethereum). Ethereum 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. | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/call/:address Read-Only Contract Call (eth_call) (ethereum). Ethereum read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data. | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/contract/:address EVM Contract Introspection (ethereum). Ethereum contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 implementation/admin/beacon and legacy OpenZeppelin slots)… | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/optimism/balance/:address EVM Wallet Balances (optimism). Optimism 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. | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/optimism/call/:address Read-Only Contract Call (eth_call) (optimism). Optimism read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data. | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/evm/optimism/contract/:address EVM Contract Introspection (optimism). Optimism 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… | Base | Onchain data | $0.003 | 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. | Base | Onchain data | $0.003 | 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. | Base | Onchain data | $0.003 | 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… | Base | Onchain data | $0.003 | 2026-09-25 |
https://saylorinnovations.com/api/package/report Inspect the latest npm package release: version, license, dependency counts, engine requirements, deprecation notice and source links. Does not download or execute package code. | Base | Developer tools | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/package/search Find up to five npm packages with versions, descriptions, registry ranking scores and source links for package discovery. | Base | Developer tools | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/python/report Inspect a Python package’s latest release, Python compatibility, declared dependencies, license metadata and PyPI-reported advisories. No code execution. | Base | Developer tools | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/research/doi Resolve a DOI into normalized publication metadata, citation text, identifiers and source links. Abstracts and full paper text are excluded. | Base | Developer tools | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/research/search Find up to five publications with DOI identifiers, authors, publication years and citation counts. Returns metadata, not abstracts or full text. | Base | Other | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/security/cve Resolve a CVE into its published description, status, CVSS metrics, weakness identifiers and vendor/reference links. This does not scan a system or prove safety. | Base | Security | $0.003 | 2026-10-05 |
https://saylorinnovations.com/api/stocks/fundamentals/:symbol Company Fundamentals (SEC filings) — NVDA. Company fundamentals from official SEC 10-K filings: last 4 fiscal years of revenue, net income, operating income, diluted EPS, operating cash flow, total assets, liabilities, … | Base | Market data | $0.003 | 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. | Base | Onchain data | $0.005 | 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… | Base | Onchain data | $0.005 | 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. | Base | Onchain data | $0.005 | 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… | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/events/:address Contract Event Logs (bsc). BNB Chain (BSC) contract event logs over a recent block window: block, transaction hash, log index, topics and data, optionally filtered by event signature (?topic0=). Use it to watch a contra… | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/bsc/transfers/:address Token Transfer History (bsc). BNB Chain token transfer history for a wallet (in/out labelled, decoded amounts). | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/events/:address Contract Event Logs (ethereum). Ethereum contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows. | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/nft-metadata/:address/1 NFT Metadata (ERC-721 / ERC-1155) (ethereum). NFT metadata for ERC-721 and ERC-1155: tokenURI resolved (IPFS, Arweave, data: URIs) and the JSON fetched and parsed, with a direct image URL. Any of 5 chains. | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/nfts/:address/:address2 NFTs Held in a Collection (ERC-721 Enumerable) (ethereum). NFTs a wallet holds in a collection (ERC-721 Enumerable): balance and up to 50 token ids. Any of 5 chains. | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/ethereum/transfers/:address Token Transfer History (ethereum). Ethereum 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… | Base | Onchain data | $0.005 | 2026-09-25 |
https://saylorinnovations.com/api/evm/optimism/events/:address Contract Event Logs (optimism). Optimism contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows. | Base | Onchain data | $0.005 | 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.