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://readability.openverbs.com/v1/reading-time Estimate reading and speaking time for a text at configurable words-per-minute rates (defaults: 200 wpm reading, 130 wpm speaking). | Base | Developer tools | $0.002 | 2026-10-05 |
https://readability.openverbs.com/v1/score Compute the standard English readability formulas — Flesch Reading Ease, Flesch–Kincaid grade, Gunning fog, SMOG, Coleman–Liau and ARI — along with the underlying sentence/word/syllable statistics. Empty text is a clean… | Base | Developer tools | $0.002 | 2026-10-05 |
https://readability.openverbs.com/v1/syllables Count syllables per word and in total across the text. | Base | Developer tools | $0.002 | 2026-10-05 |
https://search.openverbs.com/v1/wikipedia Wikipedia summary API - the plain-language summary of the best-matching Wikipedia article for a topic or query, in any language. Returns the article title, short description, summary extract, thumbnail image and canonic… | Base | Web data | $0.002 | 2026-10-05 |
https://semver.openverbs.com/v1/compare Compare two semantic versions and report which is greater (precedence-aware). | Base | Search | $0.002 | 2026-09-06 |
https://semver.openverbs.com/v1/parse Parse a semantic version into major/minor/patch, prerelease and build metadata. | Base | Developer tools | $0.002 | 2026-10-05 |
https://semver.openverbs.com/v1/satisfies Test whether a version satisfies a semver range (^, ~, x-ranges, ||, hyphen). | Base | Developer tools | $0.002 | 2026-09-06 |
https://similarity.openverbs.com/v1/compare Report whether two tokens sound alike under a chosen algorithm (soundex, metaphone or double-metaphone; default double-metaphone). Returns each token's codes and a boolean match. | Base | Other | $0.002 | 2026-10-05 |
https://similarity.openverbs.com/v1/double-metaphone Encode a word with Double Metaphone, returning a primary and a secondary code to capture alternate pronunciations (useful for non-English names). | Base | Developer tools | $0.002 | 2026-10-05 |
https://similarity.openverbs.com/v1/metaphone Encode a word with the Metaphone algorithm — more accurate than Soundex for English pronunciation. | Base | Developer tools | $0.002 | 2026-10-05 |
https://similarity.openverbs.com/v1/soundex Encode a word with the classic Soundex algorithm (letter + 3 digits) for phonetic matching of names. | Base | Commerce | $0.002 | 2026-10-05 |
https://slug.openverbs.com/v1/create Convert text into a URL-safe slug: transliterate accents, apply a locale character map, and join with a separator. | Base | Web data | $0.002 | 2026-10-05 |
https://text.openverbs.com/v1/case Recase a string into camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, Sentence case, Capital Case, Train-Case, no case, Title Case, or plain UPPER/lower — the word boundaries are detect… | Base | Developer tools | $0.002 | 2026-10-05 |
https://text.openverbs.com/v1/decode Decode a base64, base64url, hex, base32, or URL percent-encoded string back into UTF-8 text. Malformed input for the chosen encoding is rejected as a clean 400. | Base | Developer tools | $0.002 | 2026-10-05 |
https://text.openverbs.com/v1/diff Diff two texts. The default `unified` mode returns a unified-diff patch string; `lines`, `words`, and `chars` modes return a structured array of added/removed/unchanged parts. | Base | Developer tools | $0.002 | 2026-10-05 |
https://text.openverbs.com/v1/encode Encode a UTF-8 string into base64, base64url, hex, base32, or URL percent-encoding. | Base | Developer tools | $0.002 | 2026-10-05 |
https://timecode.openverbs.com/v1/add Add or subtract from a timecode, either another timecode (b) or a raw frame count (frames), at a given frame rate. Uses frame-exact SMPTE math (including drop-frame). A result below zero is rejected as a clean 400. | Base | Other | $0.002 | 2026-09-06 |
https://timecode.openverbs.com/v1/convert Rebase a timecode (or a raw frame count) from one frame rate to another on a real-time basis, so the wall-clock position is preserved. Give a source frameRate plus timecode or totalFrames, and a toFrameRate (with option… | Base | Other | $0.002 | 2026-09-06 |
https://timecode.openverbs.com/v1/parse Parse an SMPTE timecode (HH:MM:SS:FF, or HH:MM:SS;FF for drop-frame) at a given frame rate into its components, total frame count and real-time seconds. Drop-frame is auto-detected from a ';' separator unless dropFrame … | Base | Developer tools | $0.002 | 2026-09-06 |
https://unicode.openverbs.com/v1/block Resolve a Unicode block name (loose matching) to its range, size, count of assigned characters and a small sample. An unknown block is a successful `found:false`. This is a Unicode Character Database block — not a block… | Base | Other | $0.002 | 2026-10-05 |
https://unicode.openverbs.com/v1/inspect Resolve a single code point (given as 'char' or 'codepoint') to its name, general category, block, script and plane. Provide exactly one of the two inputs. | Base | Other | $0.002 | 2026-09-06 |
https://unicode.openverbs.com/v1/name Reverse lookup: resolve a Unicode character name (e.g. 'SNOWMAN', 'CJK UNIFIED IDEOGRAPH-4E2D', 'HANGUL SYLLABLE GA') to its code point. Loose whitespace/case matching. An unknown name is a successful `found:false`. | Base | Other | $0.002 | 2026-10-05 |
https://unicode.openverbs.com/v1/script Resolve a Unicode script name (loose matching) to its code point ranges, total size and a small sample. An unknown script is a successful `found:false`. | Base | Other | $0.002 | 2026-10-05 |
https://unit.openverbs.com/v1/convert Convert a value between units — length, mass, volume, temperature, area, speed, pressure, energy, power, digital storage, time, angle, frequency and more. Unknown units or a conversion between incompatible measures (e.g… | Base | Developer tools | $0.002 | 2026-09-06 |
https://unit.openverbs.com/v1/list List the supported units and their metadata (abbreviation, measure, system, singular/plural names), optionally filtered to a single measure — a discovery endpoint for choosing valid `from`/`to` values. | Base | Other | $0.002 | 2026-10-05 |
https://url.openverbs.com/v1/normalize Canonicalize a URL: WHATWG parsing already lowercases the host, resolves dot-segments and drops default ports; on top of that, query parameters are sorted by default and you can optionally drop the fragment or a trailin… | Base | Developer tools | $0.002 | 2026-09-06 |
https://url.openverbs.com/v1/parse Parse an absolute URL into its WHATWG components: protocol/scheme, credentials, host/hostname/port, origin, pathname (plus path segments), search (plus a decoded query object) and hash. A string that is not a valid abso… | Base | Developer tools | $0.002 | 2026-09-06 |
https://url.openverbs.com/v1/query Two directions over query strings. action='parse' decodes a query string (with or without a leading '?') into an object, collapsing repeated keys into arrays. action='build' encodes a params object into a query string, … | Base | Developer tools | $0.002 | 2026-10-05 |
https://url.openverbs.com/v1/resolve Resolve a relative or absolute reference against a base URL, following RFC 3986 reference resolution (e.g. base 'https://a.com/x/y' + ref '../z' → 'https://a.com/z'). The base must itself be a valid absolute URL, else a… | Base | Web data | $0.002 | 2026-09-06 |
https://useragent.openverbs.com/v1/classify Classify a User-Agent by device form factor and return convenience booleans (isBot, isMobile, isTablet, isDesktop, isTouchCapable) for routing decisions. | Base | Inference | $0.002 | 2026-10-05 |
https://useragent.openverbs.com/v1/is-bot Detect whether a User-Agent belongs to a known bot, crawler, AI agent or HTTP tool, and if so return its name and category (search, social, seo, ai, monitoring, tool, …). | Base | Web data | $0.002 | 2026-10-05 |
https://useragent.openverbs.com/v1/parse Break a User-Agent string into browser, engine, operating system (each with a version) and device type. Unidentifiable components are reported as null. | Base | Developer tools | $0.002 | 2026-10-05 |
https://chain.openverbs.com/v1/ens-resolve Resolve an ENS name (like alice.eth) to its Ethereum address, read live from the ENS resolver on Ethereum mainnet. Offchain names such as *.base.eth resolve too. Returns `found:false` (a real answer, not an error) when … | Base | Onchain data | $0.003 | 2026-09-27 |
https://chain.openverbs.com/v1/ens-reverse Reverse-resolve an Ethereum address to its primary ENS name (the reverse record set by the owner), read live on Ethereum mainnet. Returns `found:false` when the address has no primary name set. Live reads with automatic… | Base | Onchain data | $0.003 | 2026-09-27 |
https://chain.openverbs.com/v1/receipt Live transaction receipt by hash via `eth_getTransactionReceipt`: success/failed status, block number, from/to, created contract address, gas used, cumulative gas, effective gas price (wei + gwei), tx type and the emitt… | Base | Onchain data | $0.003 | 2026-09-27 |
https://chain.openverbs.com/v1/tx Live status and details of a transaction by hash: success/failed/pending, from/to, value (wei + ether), nonce, block number, gas used, effective gas price and any created contract address. Returns `found:false` for unkn… | Base | Onchain data | $0.003 | 2026-09-27 |
https://crypto.openverbs.com/v1/defi-overview DeFi market overview: total value locked (USD) across all chains, the chain count, and the top chains by TVL with each chain's TVL dominance. This is DeFi TVL — not total crypto market cap. | Base | Onchain data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/dex-aggregators DEX aggregator trading volume: total 24h/7d/30d USD volume with 1d/7d change, plus the top aggregators (1inch, CowSwap, Jupiter, etc.) by 24h volume. Optional chain filter scopes the totals and ranking to one chain. | Base | Onchain data | $0.003 | 2026-09-11 |
https://crypto.openverbs.com/v1/dex-volume Decentralised exchange (DEX) trading volume: total 24h and 7d USD volume with 1d/7d change, plus the top DEXs by 24h volume. Optional `chain` filter scopes the totals and ranking to one chain. | Base | Onchain data | $0.003 | 2026-09-19 |
https://crypto.openverbs.com/v1/fear-greed Crypto sentiment via the live Fear and Greed Index (0-100 with classification, e.g. Fear/Greed). Optionally include a short historical series. Source: alternative.me. | Base | Market data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/fees DeFi protocol fees and revenue: total 24h and 7d fees (USD) paid by users across protocols, plus the top protocols by 24h fees with each one's 24h revenue where reported. Optional `chain` filter scopes totals and rankin… | Base | Onchain data | $0.003 | 2026-09-11 |
https://crypto.openverbs.com/v1/history Token price history: historical USD price series (price chart data) for one coin/token by coin id (e.g. "coingecko:bitcoin", "ethereum:0xdAC17…"). Returns evenly spaced `points` over the last `span` periods. | Base | Market data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/market-cap Crypto market cap: total cryptocurrency market capitalization (USD), 24h trading volume, Bitcoin (BTC) and Ethereum (ETH) dominance, 24h market-cap change and active coin/market counts. Whole-market context behind any s… | Base | Market data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/ohlc Crypto price history as OHLC candles from on-chain perp DEXs: open/high/low/close, base volume and trade count per interval (1m, 5m, 15m, 1h, 4h, 1d) for a coin (BTC, ETH, SOL, and more). Returns up to 500 candles, olde… | Base | Market data | $0.003 | 2026-09-19 |
https://crypto.openverbs.com/v1/options Onchain options trading volume (premium): total 24h/7d/30d USD volume with 1d/7d change, plus the top options protocols by 24h volume. Optional `chain` filter scopes the totals and ranking to one chain. | Base | Onchain data | $0.003 | 2026-09-11 |
https://crypto.openverbs.com/v1/protocols Top DeFi protocols ranked by total value locked (USD), with 1d/7d TVL change, category and chains. Optional filters: `chain` (ranks by that chain's TVL) and `category` (e.g. "Dexes", "Lending"). Centralised-exchange res… | Base | Onchain data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/stablecoins Stablecoin market: total circulating market cap (USD) and the largest stablecoins by mcap with their peg type, peg mechanism (e.g. fiat-backed, crypto-backed) and dominance. | Base | Market data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/staking Crypto staking rewards: live staking APY and TVL for liquid-staking and restaking protocols (Lido, Rocket Pool, ether.fi, Jito, Binance, …), ranked by size. Filter by asset (e.g. ETH, SOL), chain or protocol. Data sourc… | Base | Onchain data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/trending Trending crypto by 24h price momentum: the biggest gainers and losers among the top coins by market cap, each with symbol, rank, USD price, 24h change % and market cap. A momentum/discovery signal for agents. Data sourc… | Base | Market data | $0.003 | 2026-10-05 |
https://crypto.openverbs.com/v1/tvl Total value locked (USD) for a DeFi protocol (e.g. "aave") or a whole chain (e.g. "Ethereum"). Provide exactly one of `protocol` or `chain`. | Base | Onchain data | $0.003 | 2026-09-11 |
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.