chain.openverbs.com
Base · payout 0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a
Answers HTTP 402
69 of 121 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)
615 x402-style payments from 15 distinct payers, $9.75 USDC in the last 7 days (Base, exact read)
window ended 2026-10-05
- Payments
- 615
- Outside payers
- 15
- USDC
- 9.75
All USDC received at this payout address: $9.75 (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 | 0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a | 408 | 69 of 121 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-05 | 615 x402-style payments from 15 distinct payers, $9.75 USDC in the last 7 days (Base, exact read) |
- Hosts
- airport.openverbs.com, astro.openverbs.com, bitwise.openverbs.com, braille.openverbs.com, chain.openverbs.com, checkdigit.openverbs.com, checksum.openverbs.com, chem.openverbs.com, chemeq.openverbs.com, color.openverbs.com, combinatorics.openverbs.com, creditcard.openverbs.com, crypto.openverbs.com, data.openverbs.com, datetime.openverbs.com, dice.openverbs.com, dictionary.openverbs.com, distribution.openverbs.com, dns.openverbs.com, edgar.openverbs.com, email.openverbs.com, emailauth.openverbs.com, emoji.openverbs.com, encoding.openverbs.com, finance.openverbs.com, format.openverbs.com, fraction.openverbs.com, fx.openverbs.com, geocode.openverbs.com, geometry.openverbs.com, geospatial.openverbs.com, gleif.openverbs.com, hash.openverbs.com, holidays.openverbs.com, html.openverbs.com, iban.openverbs.com, ical.openverbs.com, id.openverbs.com, inflect.openverbs.com, ip.openverbs.com, iso.openverbs.com, jsonschema.openverbs.com, jwt.openverbs.com, macaddress.openverbs.com, markdown.openverbs.com, math.openverbs.com, matrix.openverbs.com, mcpscan.openverbs.com, mime.openverbs.com, money.openverbs.com, music.openverbs.com, nato.openverbs.com, numeral.openverbs.com, numtheory.openverbs.com, otp.openverbs.com, pack.openverbs.com, password.openverbs.com, pdf.openverbs.com, phone.openverbs.com, physics.openverbs.com, places.openverbs.com, postal.openverbs.com, preflight.openverbs.com, products.openverbs.com, qr.openverbs.com, random.openverbs.com, rdap.openverbs.com, readability.openverbs.com, regex.openverbs.com, scan.openverbs.com, search.openverbs.com, semver.openverbs.com, sentiment.openverbs.com, seo.openverbs.com, similarity.openverbs.com, slug.openverbs.com, spreadsheet.openverbs.com, stats.openverbs.com, text.openverbs.com, timecode.openverbs.com, tls.openverbs.com, tokens.openverbs.com, unicode.openverbs.com, unit.openverbs.com, url.openverbs.com, urltrust.openverbs.com, useragent.openverbs.com, vat.openverbs.com, wallet.openverbs.com, web.openverbs.com, wikidata.openverbs.com
- Listings
- 408 registered in the x402 catalogue
- Price range
- $0.0010 to $0.060 per call, as registered
- Categories (auto)
- Developer tools (141), Other (113), Onchain data (38), Web data (30), Identity (21), Media (17), Market data (14), Search (13), Commerce (12), Security (6), Inference (3)
- First seen
- 2026-10-05 · last seen 2026-10-05
Claim this merchant
Sign a message from the payout address 0xb3f4de…c2194a 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 · 408
| Endpoint | Chain | Category | Price | Catalogue date |
|---|---|---|---|---|
https://similarity.openverbs.com/v1/hamming Hamming distance — the number of positions at which two EQUAL-LENGTH strings differ — plus a normalized similarity. Strings of unequal length are a clean 400. | Base | Developer tools | $0.004 | 2026-10-05 |
https://similarity.openverbs.com/v1/jaccard Jaccard similarity index in [0,1] — the size of the intersection over the union of the two strings' character-bigram sets. | Base | Other | $0.004 | 2026-10-05 |
https://similarity.openverbs.com/v1/jaro Jaro similarity and the Jaro-Winkler variant (which boosts scores for a shared prefix), both in [0,1]. The prefix boost factor is configurable (default 0.1, max 0.25). Well suited to short strings like names. | Base | Other | $0.004 | 2026-10-05 |
https://similarity.openverbs.com/v1/levenshtein Levenshtein edit distance (insertions, deletions, substitutions) between two strings, plus a normalized similarity in [0,1]. Operates on Unicode code points. | Base | Developer tools | $0.004 | 2026-10-05 |
https://spreadsheet.openverbs.com/v1/a1-to-rc Parse an A1-style cell reference (e.g. "B3" or "$AA$100") into 1-based row and column numbers, plus the column letters and whether each part is absolute. | Base | Developer tools | $0.004 | 2026-09-06 |
https://spreadsheet.openverbs.com/v1/column Convert between a spreadsheet column letter and its 1-based index in either direction. Provide exactly one of `letter` (e.g. "AA") or `number` (e.g. 27); the response always contains both. | Base | Commerce | $0.004 | 2026-09-06 |
https://spreadsheet.openverbs.com/v1/range Parse an A1 range like "A1:C10" into its start and end cells (normalized so start is the top-left) and its extent — row count, column count and total cell count. | Base | Developer tools | $0.004 | 2026-09-06 |
https://spreadsheet.openverbs.com/v1/rc-to-a1 Build an A1-style cell reference from 1-based row and column numbers, optionally marking the row and/or column absolute ($). | Base | Other | $0.004 | 2026-10-05 |
https://stats.openverbs.com/v1/correlation Pearson correlation coefficient and covariance of two equal-length paired series. Rejected as a clean 400 if the lengths differ or either series has zero variance (correlation undefined). | Base | Other | $0.004 | 2026-09-06 |
https://stats.openverbs.com/v1/percentile Evaluate one or more percentiles (0–100) of a numeric sample using linear interpolation between order statistics (the R-7 / Excel PERCENTILE.INC method). 50 is the median, 25/75 the quartiles. | Base | Other | $0.004 | 2026-10-05 |
https://stats.openverbs.com/v1/regression Ordinary-least-squares linear regression of y on x: slope, intercept, correlation r and coefficient of determination r². Pass predictAt to also evaluate the fitted line at a given x. Rejected as a clean 400 if lengths d… | Base | Other | $0.004 | 2026-09-06 |
https://stats.openverbs.com/v1/summary Full descriptive summary of a numeric sample: count, sum, min/max/range, mean, median, mode(s), variance, standard deviation and the quartiles (q1/q3/iqr). Set sample=true for the sample variance/stdev (÷ n-1) instead o… | Base | Other | $0.004 | 2026-10-05 |
https://tokens.openverbs.com/v1/count Count the LLM tokens in text for a given model or encoding — exact for OpenAI and open models (Llama, Mistral, Qwen, Gemma, DeepSeek, Command-R); labelled-approximate for Claude & Gemini. | Base | Inference | $0.004 | 2026-10-05 |
https://urltrust.openverbs.com/v1/analyze Score how likely a URL is to be phishing or untrustworthy using offline lexical and structural heuristics (no network lookups). Checks raw-IP hosts, embedded credentials, punycode/homoglyph labels, brand typosquatting, … | Base | Security | $0.004 | 2026-09-06 |
https://wallet.openverbs.com/v1/detect Guess which chain an address belongs to from its shape and encoding, without requiring the caller to know it up front. Returns the chain, format and address type, or nulls when nothing matches. | Base | Developer tools | $0.004 | 2026-10-05 |
https://wallet.openverbs.com/v1/eip55 Apply the EIP-55 mixed-case checksum to an Ethereum address, regardless of its input casing. Returns the checksummed address and whether it differed from the input. Non-hex input is rejected before payment. | Base | Onchain data | $0.004 | 2026-09-06 |
https://wallet.openverbs.com/v1/normalize Normalise an address to its canonical form — Ethereum to its EIP-55 checksummed form, bech32 Bitcoin to lowercase (base58check is left untouched as it is case-sensitive). An address that is not a valid address of a know… | Base | Developer tools | $0.004 | 2026-09-06 |
https://wallet.openverbs.com/v1/validate Validate a blockchain address. Supply `chain` to check against a specific chain, or omit it to auto-detect. Ethereum addresses report their EIP-55 checksum state; Bitcoin covers base58check (P2PKH/P2SH) and bech32/bech3… | Base | Onchain data | $0.004 | 2026-10-05 |
https://crypto.openverbs.com/v1/news Crypto news API: live cryptocurrency news headlines for a query (e.g. "bitcoin etf", "ethereum upgrade", "solana"), from Google News and localised by location/language. Returns ranked articles with title, URL, domain an… | Base | Web data | $0.005 | 2026-09-19 |
https://chain.openverbs.com/v1/abi Get the verified contract ABI and verification metadata for a deployed contract by address, sourced from Sourcify. Returns the contract ABI (to decode or call it), contract name, compiler/language, match type, and proxy… | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/btc-address Balance and activity for a Bitcoin address (base58 1…/3… or bech32 bc1…): confirmed balance (sats and BTC), total received and sent, confirmed transaction count, and unconfirmed/pending value and tx count from the mempo… | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/btc-fees Live recommended Bitcoin transaction fee rates (in sat/vB) for next-block, ~30-minute, ~1-hour, economy and minimum confirmation targets, straight from the mempool. Also estimates the total fee (in sats and BTC) for a t… | Base | Onchain data | $0.006 | 2026-10-01 |
https://chain.openverbs.com/v1/btc-mempool Live snapshot of the Bitcoin mempool: number of unconfirmed transactions, total pending virtual size (bytes and MB), the current backlog in blocks, total fees pending (sats and BTC), the fee-rate histogram, and the curr… | Base | Onchain data | $0.006 | 2026-10-01 |
https://chain.openverbs.com/v1/btc-tx Look up a Bitcoin transaction by txid: confirmation status, block height and time, fee (sats), effective fee rate (sat/vB), size, weight and virtual size, input and output counts, and total output value (sats and BTC). … | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/bytecode Fetch deployed EVM contract runtime bytecode and its Keccak-256 code hash to fingerprint or compare contracts, or feed a disassembler. Supports Ethereum, Base, Arbitrum, Optimism and Polygon, with optional historical bl… | Base | Onchain data | $0.006 | 2026-10-03 |
https://chain.openverbs.com/v1/explain Decode a transaction into plain language: native ETH transfer, contract call (with decoded method name for common ERC-20/DEX functions like transfer, approve, swap, mint, multicall) or contract creation; ERC-20 and NFT … | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/logs Query a contract's event logs over a bounded block range via `eth_getLogs`: filter by `address` (required) and optional `topics`, get back raw logs (topics, data, block, tx hash, log index) with ERC-20/721 Transfer logs… | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/nft-metadata Resolve one NFT (contract + tokenId) into normalized metadata: name, description, image, attributes and token standard (ERC-721 or ERC-1155). Reads the on-chain tokenURI/uri, then fetches and normalizes the metadata doc… | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/read-contract Call a read-only (view/pure) function on any deployed contract via eth_call and get the decoded result. Give the contract address and a human-readable signature (e.g. 'balanceOf(address) view returns (uint256)') plus ar… | Base | Onchain data | $0.006 | 2026-09-27 |
https://chain.openverbs.com/v1/sanctions Screen a crypto wallet address against the OFAC SDN sanctions list (US Treasury Specially Designated Nationals) before transacting. Multi-chain across ~20 assets (BTC, ETH, USDT, TRX, XMR and more); EVM 0x addresses mat… | Base | Security | $0.006 | 2026-10-05 |
https://chain.openverbs.com/v1/source Get the verified Solidity/Vyper source code for a deployed contract by address, sourced from Sourcify. Returns every source file (path + content), the contract name, language, compiler version and compiler settings (opt… | Base | Onchain data | $0.006 | 2026-10-03 |
https://chain.openverbs.com/v1/token-risk Deterministic risk screen of an ERC-20 token from on-chain bytecode and metadata, no third-party risk API. Flags privileged or abuse capabilities: blacklist/freeze, owner mint, pausable transfers, upgradeable proxy and … | Base | Onchain data | $0.006 | 2026-09-27 |
https://dns.openverbs.com/v1/resolve Resolve DNS records for a hostname — A, AAAA, CNAME, MX, TXT, NS, SOA, CAA or SRV. NXDOMAIN or an absent record type returns an empty record set. | Base | Identity | $0.006 | 2026-10-01 |
https://dns.openverbs.com/v1/reverse Reverse-resolve an IPv4 or IPv6 address to its PTR hostname(s). No PTR record returns an empty list. This is reverse DNS (PTR) — not ENS or onchain name resolution. | Base | Identity | $0.006 | 2026-09-06 |
https://edgar.openverbs.com/v1/facts Read a single XBRL financial concept for a company (by CIK or ticker) from its as-filed statements. Give the concept's XBRL tag (e.g. Revenues, NetIncomeLoss, Assets, EarningsPerShareDiluted) and optionally the taxonomy… | Base | Market data | $0.006 | 2026-09-22 |
https://edgar.openverbs.com/v1/filings List a company's most recent EDGAR filings, identified by CIK or ticker. Optionally filter to a single form type (e.g. 10-K, 10-Q, 8-K, 4, S-1). Each filing includes its accession number, form type, filing and report da… | Base | Market data | $0.006 | 2026-09-06 |
https://edgar.openverbs.com/v1/lookup Resolve a stock ticker symbol or company name to its Central Index Key (CIK) - the identifier every other EDGAR endpoint keys on. Exact ticker matches rank first, then company-name prefix/substring matches. Returns each… | Base | Identity | $0.006 | 2026-10-02 |
https://email.openverbs.com/v1/validate Validate an email address — syntax, MX/A deliverability lookup, and disposable / role-based address detection. No mailbox probing. | Base | Identity | $0.006 | 2026-10-01 |
https://fx.openverbs.com/v1/convert Convert an amount from one currency to another using reference rates (latest or a historical date). Amount defaults to 1. | Base | Developer tools | $0.006 | 2026-10-02 |
https://fx.openverbs.com/v1/rates Reference exchange rates for a base currency against some or all supported currencies (latest or a historical date). | Base | Market data | $0.006 | 2026-09-30 |
https://geocode.openverbs.com/v1/forward Convert a free-form address or place name into ranked coordinates with a structured, normalized address. Optionally bias by country and language. | Base | Developer tools | $0.006 | 2026-10-01 |
https://geocode.openverbs.com/v1/reverse Convert latitude/longitude coordinates into the nearest structured address. Optionally set the preferred result language. | Base | Media | $0.006 | 2026-09-06 |
https://gleif.openverbs.com/v1/lookup Resolve a 20-character Legal Entity Identifier (LEI, ISO 17442) to its authoritative entity record: verified legal name, registration status (ISSUED/LAPSED/RETIRED), entity status, jurisdiction, legal form, registration… | Base | Other | $0.006 | 2026-09-06 |
https://gleif.openverbs.com/v1/parents Resolve a legal entity's direct and ultimate accounting-consolidating parents from GLEIF's global CC0 LEI registry. Returns parent names and LEIs, relationship status, corroboration and explicit reporting exceptions. Us… | Base | Other | $0.006 | 2026-10-03 |
https://gleif.openverbs.com/v1/search Find Legal Entity Identifiers by legal name, optionally filtered to an ISO 3166-1 alpha-2 country. Returns matching entities with their LEI, verified legal name, registration status, jurisdiction and city/country - the … | Base | Other | $0.006 | 2026-10-02 |
https://pdf.openverbs.com/v1/extract Extract plain text and metadata (title, author, producer, page count) from a PDF supplied by URL or base64 — heavy pdf.js parsing an agent can't self-run. | Base | Developer tools | $0.006 | 2026-09-19 |
https://preflight.openverbs.com/v1/inspect Fetch any URL and, without paying, decode its x402 402 Payment Required challenge: price (atomic and formatted for known stablecoins), asset, network, payTo, resource, description, timeout and any input schema. Flags MP… | Base | Web data | $0.006 | 2026-10-02 |
https://products.openverbs.com/v1/amazon-product Amazon product detail API (US) by ASIN - Amazon product data for one ASIN: title, product URL, image, price range, discount, currency, star rating, review count, category path, availability and description. Amazon price… | Base | Commerce | $0.006 | 2026-09-25 |
https://products.openverbs.com/v1/amazon-search Amazon product search API - search Amazon products / find products on Amazon by keyword (US). Live Amazon product data: ranked listings with ASIN, title, product URL, image, price range, currency, star rating, review co… | Base | Commerce | $0.006 | 2026-10-02 |
https://products.openverbs.com/v1/amazon-sellers Amazon offers & sellers API (US) by ASIN: the buy-box winner plus third-party sellers, each with seller name, price, regular price, discount, condition (new/used), ships-from and seller rating. Amazon offers and sellers… | Base | Commerce | $0.006 | 2026-09-13 |
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.