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://inflect.openverbs.com/v1/count Choose the singular or plural form for a given count, e.g. (apple, 3) → "apples", (apple, 1) → "apple". By default the count is prepended ("3 apples"); set includeCount=false to omit it. | Base | Other | $0.002 | 2026-10-05 |
https://inflect.openverbs.com/v1/pluralize Return the plural form of an English word (handles irregulars — person → people, mouse → mice). | Base | Other | $0.002 | 2026-10-05 |
https://inflect.openverbs.com/v1/singularize Return the singular form of an English word (handles irregulars — people → person, mice → mouse). | Base | Other | $0.002 | 2026-10-05 |
https://ip.openverbs.com/v1/contains Test whether an IP address falls within a CIDR block. A well-formed address of a different family (or simply outside the block) returns contains=false — not an error. | Base | Developer tools | $0.002 | 2026-09-06 |
https://ip.openverbs.com/v1/expand Return both the fully-expanded (eight 4-hex groups) and canonical compressed (RFC 5952) forms of an address. IPv4 is returned unchanged in both fields. | Base | Developer tools | $0.002 | 2026-09-06 |
https://ip.openverbs.com/v1/parse Parse an IPv4 or IPv6 address and classify it — version, normalized form and RFC range (unicast, private, loopback, linkLocal, multicast, uniqueLocal, ipv4Mapped, …). Detects IPv4-mapped IPv6. | Base | Developer tools | $0.002 | 2026-09-06 |
https://ip.openverbs.com/v1/subnet Compute network details of a CIDR block — network & broadcast address, usable host range, total and usable address counts. Works for IPv4 and IPv6 (counts returned as strings for large IPv6 blocks). Honours RFC 3021 for… | Base | Developer tools | $0.002 | 2026-09-06 |
https://iso.openverbs.com/v1/country Look up a country by its ISO 3166-1 alpha-2 code, alpha-3 code, numeric code or English name. Provide exactly one field. Returns all codes plus the UN region. | Base | Other | $0.002 | 2026-09-06 |
https://iso.openverbs.com/v1/currency Look up an active ISO 4217 currency by its alphabetic code or numeric code. Provide exactly one field. Returns the code, numeric code, name and number of minor units (decimal places). | Base | Other | $0.002 | 2026-09-23 |
https://iso.openverbs.com/v1/language Look up a language by its ISO 639-1 alpha-2 code, ISO 639-2 alpha-3 code (bibliographic or terminologic) or English name. Provide exactly one field. | Base | Other | $0.002 | 2026-09-06 |
https://iso.openverbs.com/v1/search Fuzzy-search countries, currencies and languages by name or code. Scope with `registry` (defaults to all). Matches are ranked exact-code/name → prefix → substring. | Base | Search | $0.002 | 2026-10-05 |
https://macaddress.openverbs.com/v1/format Reformat a MAC address into the requested notation (colon, hyphen, Cisco dot or bare) and case (lower default or upper). | Base | Other | $0.002 | 2026-09-06 |
https://macaddress.openverbs.com/v1/generate Generate a random EUI-48 MAC address. By default it is locally-administered and unicast (safe for testing); set `local:false` for a universal-bit address or `multicast:true` for a group address. | Base | Developer tools | $0.002 | 2026-10-05 |
https://macaddress.openverbs.com/v1/info Report the properties of a MAC address encoded in its first octet: unicast vs multicast (I/G bit), universal vs locally-administered (U/L bit), the broadcast address, and — for EUI-48 — the OUI and NIC portions. | Base | Commerce | $0.002 | 2026-09-06 |
https://macaddress.openverbs.com/v1/parse Parse a MAC / EUI-48 or EUI-64 address from any common notation (colon, hyphen, Cisco dot, or bare hex) and return it in every canonical form plus its integer value. | Base | Developer tools | $0.002 | 2026-09-06 |
https://macaddress.openverbs.com/v1/to-eui64 Derive the modified EUI-64 interface identifier from a 48-bit MAC (insert FFFE, flip the U/L bit) and the resulting IPv6 link-local address (fe80::/64). | Base | Other | $0.002 | 2026-09-06 |
https://markdown.openverbs.com/v1/frontmatter Split YAML front-matter from a document — returns the parsed metadata object and the remaining content body. Malformed YAML is rejected as a clean 400. | Base | Developer tools | $0.002 | 2026-10-05 |
https://markdown.openverbs.com/v1/render Render GitHub-Flavored Markdown to HTML. Output is sanitized by default (scripts, event handlers and javascript: URLs removed); set sanitize=false to keep raw HTML. | Base | Media | $0.002 | 2026-10-05 |
https://markdown.openverbs.com/v1/toc Extract the heading outline from Markdown — depth, text and a unique GitHub-style anchor slug for each heading. Optionally limit to a maximum heading depth. | Base | Web data | $0.002 | 2026-10-05 |
https://mime.openverbs.com/v1/extension Resolve a MIME type to its default file extension. | Base | Other | $0.002 | 2026-10-05 |
https://mime.openverbs.com/v1/lookup Resolve a filename, path or extension to its MIME type, charset and full Content-Type. | Base | Other | $0.002 | 2026-10-05 |
https://money.openverbs.com/v1/allocate Split an amount into parts using integer minor-unit math so the shares always sum back to the exact original — no rounding drift. Pass parts for an even split, or ratios for a weighted one (e.g. [1,1,1] splits $100 into… | Base | Other | $0.002 | 2026-10-05 |
https://money.openverbs.com/v1/format Format a numeric amount as currency for a given locale using Intl, honouring the currency's own minor-unit convention (USD→2, JPY→0). display selects the symbol, narrow symbol, ISO code or full name. An unknown currency… | Base | Other | $0.002 | 2026-09-06 |
https://money.openverbs.com/v1/parse Parse a formatted money string back into a number, using the locale's grouping and decimal separators (so '1.234,56' in de-DE → 1234.56). Currency symbols/codes and whitespace are stripped; parentheses or a leading minu… | Base | Developer tools | $0.002 | 2026-09-06 |
https://money.openverbs.com/v1/round Round an amount to a currency's minor units (or an explicit minorUnits) with a chosen rounding mode: half-even (banker's, default), half-up, half-down, ceil, floor or trunc. Give a currency to derive minor units automat… | Base | Other | $0.002 | 2026-10-05 |
https://music.openverbs.com/v1/chord Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7, half-dim7, sus2, sus4, maj6, min6). Notes are spelled by stacked thirds (C dom7 → C E G Bb). Returns the note names, MIDI numbe… | Base | Other | $0.002 | 2026-09-06 |
https://music.openverbs.com/v1/interval Name the interval between two notes (`to` at or above `from`) — its size in semitones, its diatonic number and its quality (perfect/major/minor/augmented/diminished). Correct spelling matters: C→F# is an augmented fourt… | Base | Other | $0.002 | 2026-09-06 |
https://music.openverbs.com/v1/note Parse a note in scientific pitch notation (e.g. "A4", "C#5", "Bb3") into its letter, accidental, pitch class (0..11), octave, MIDI number and frequency in Hz (A4 = 440 Hz). | Base | Developer tools | $0.002 | 2026-09-06 |
https://music.openverbs.com/v1/scale Build a scale from a root note and type (major, natural-minor, harmonic-minor, melodic-minor, dorian, phrygian, lydian, mixolydian, locrian, major-pentatonic, minor-pentatonic, blues, chromatic). Heptatonic scales and m… | Base | Other | $0.002 | 2026-09-06 |
https://music.openverbs.com/v1/transpose Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats when `preferFlats` is true. | Base | Other | $0.002 | 2026-09-06 |
https://nato.openverbs.com/v1/from-morse Decode international Morse code back into text. Letters are separated by whitespace and words by "/". Unknown Morse sequences are clean 400s. | Base | Developer tools | $0.002 | 2026-09-27 |
https://nato.openverbs.com/v1/spell Spell text using the NATO/ICAO phonetic alphabet (A→Alfa, B→Bravo, …), including digits and spaces (→Space). Characters with no phonetic spelling are clean 400s. | Base | Developer tools | $0.002 | 2026-10-05 |
https://nato.openverbs.com/v1/to-morse Encode text into international (ITU) Morse code. Letters are separated by spaces and words by "/". Supports A-Z, 0-9 and common punctuation; unsupported characters are clean 400s. | Base | Developer tools | $0.002 | 2026-10-05 |
https://nato.openverbs.com/v1/unspell Turn a string of phonetic words back into text ("Sierra Oscar Sierra" → "SOS"). Accepts common alternative spellings (Alpha, Juliet, Niner). Unknown words are clean 400s. | Base | Developer tools | $0.002 | 2026-09-27 |
https://numeral.openverbs.com/v1/ordinal Format a non-negative integer as an ordinal — both the suffixed form (21st) and the ordinal words (twenty-first). | Base | Other | $0.002 | 2026-10-05 |
https://numeral.openverbs.com/v1/radix Convert an integer between numeral bases 2–36 (binary, octal, hex, base36, …). Arbitrary size via BigInt; digits are case-insensitive and a leading minus is allowed. | Base | Developer tools | $0.002 | 2026-09-06 |
https://numeral.openverbs.com/v1/roman Convert between integers (1–3999) and Roman numerals in either direction — a digit string is encoded to Roman, a Roman numeral is decoded to an integer. Non-canonical numerals (IIII, IC) are rejected. | Base | Media | $0.002 | 2026-09-06 |
https://numeral.openverbs.com/v1/words Spell an integer out in English words, e.g. 123 → "one hundred twenty-three". Negatives are prefixed with "minus". | Base | Developer tools | $0.002 | 2026-10-05 |
https://password.openverbs.com/v1/generate Generate a secure random password (characters) or a wordlist passphrase. | Base | Other | $0.002 | 2026-10-05 |
https://password.openverbs.com/v1/strength Estimate password strength: score, guesses, crack-time and feedback. Never stored. | Base | Other | $0.002 | 2026-10-05 |
https://phone.openverbs.com/v1/parse Parse, validate and format a phone number — E.164/national/international/RFC 3966, region and line type (syntactic validation, no carrier lookup). | Base | Developer tools | $0.002 | 2026-10-05 |
https://postal.openverbs.com/v1/countries List every ISO 3166-1 alpha-2 country code for which a postal-code pattern is available. | Base | Other | $0.002 | 2026-10-05 |
https://postal.openverbs.com/v1/format Normalise a postal code's casing and whitespace (uppercase, collapse runs of spaces) and report whether the normalised form is valid for the country. | Base | Developer tools | $0.002 | 2026-09-06 |
https://postal.openverbs.com/v1/spec Return the validation regular expression (source and flags) used for a country's postal codes. | Base | Developer tools | $0.002 | 2026-09-06 |
https://postal.openverbs.com/v1/validate Check whether a postal / ZIP code is well-formed for a country (ISO 3166-1 alpha-2). A malformed code is a successful result with `valid:false`, not an error — only an unsupported country or empty code is a 400. | Base | Other | $0.002 | 2026-09-06 |
https://random.openverbs.com/v1/bytes Generate cryptographically-secure random bytes, returned as hex, base64 or base64url. | Base | Developer tools | $0.002 | 2026-10-05 |
https://random.openverbs.com/v1/integer Generate one or more uniformly-distributed random integers in an inclusive [min, max] range. | Base | Developer tools | $0.002 | 2026-10-05 |
https://random.openverbs.com/v1/sample Draw a random sample from a provided array — without replacement by default (a fair shuffle), or with replacement when unique is false. count defaults to 1. | Base | Developer tools | $0.002 | 2026-10-05 |
https://random.openverbs.com/v1/string Generate a random string of a given length from a named charset (alphanumeric, alpha, lower, upper, numeric, hex, base58) or a custom alphabet. Unbiased character selection. | Base | Developer tools | $0.002 | 2026-10-05 |
https://readability.openverbs.com/v1/grade Summarise a text's difficulty as a single consensus US grade level (averaging the five grade formulas), plus the Flesch Reading Ease, a plain-language difficulty band and an approximate age range. | Base | Developer tools | $0.002 | 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.