api.duoleads.com
Base · payout 0xcd673f7e1dad254347aeab6be0defe8b9c6b3a39
Answers HTTP 402
1 of 1 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)
138 x402-style payments from 2 distinct payers, $6.90 USDC in the last 7 days (Base, exact read)
window ended 2026-10-05
- Payments
- 138
- Outside payers
- 2
- USDC
- 6.9
All USDC received at this payout address: $6.90 (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 | 0xcd673f7e1dad254347aeab6be0defe8b9c6b3a39 | 33 | 1 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-05 | 138 x402-style payments from 2 distinct payers, $6.90 USDC in the last 7 days (Base, exact read) |
- Hosts
- api.duoleads.com
- Listings
- 33 registered in the x402 catalogue
- Price range
- $0.050 per call, as registered
- Categories (auto)
- Developer tools (18), Other (7), Media (3), Onchain data (2), Commerce (1), Identity (1), Market data (1)
- First seen
- 2026-10-05 · last seen 2026-10-05
Claim this merchant
Sign a message from the payout address 0xcd673f…6b3a39 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 · 33
| Endpoint | Chain | Category | Price | Catalogue date |
|---|---|---|---|---|
https://api.duoleads.com/v1/chain/address Identify which blockchain an address belongs to and validate its encoding: EVM EIP-55 checksum, Bitcoin base58check and bech32/bech32m with witness version, Solana base58 and on-curve check, Cosmos bech32 with its HRP, … | Base | Onchain data | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/chain/selector Compute the Keccak-256 hash of a Solidity function or event signature and derive the 4-byte function selector and the 32-byte event topic. Normalises the signature first — strips parameter names, expands uint to uint256… | Base | Onchain data | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/code/hash Compute a cryptographic digest of supplied data: SHA-256, SHA-384, SHA-512, SHA-1, SHA3-256, SHA3-512, Keccak-256, BLAKE2b-256 and BLAKE2b-512, plus HMAC with any of them. Input is UTF-8 text, base64 or hex bytes; outpu… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/code/idn Convert internationalised domain names between Unicode and ASCII punycode in either direction, label by label, and validate each label against IDNA2008: length, leading and trailing hyphens, the hyphen-hyphen rule at po… | Base | Identity | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/code/jwt Decode a JSON Web Token without verifying it: returns the header, the claims, the signature length and algorithm, and a computed view of the time claims — whether exp has passed, whether nbf is in the future, and the re… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/code/semver Parse a semantic version into major, minor, patch, prerelease and build parts; compare two versions by precedence including prerelease ordering; or test whether a version satisfies a range expression using caret, tilde,… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/code/url Parse and canonicalise a URL, and extract its registrable domain using the Public Suffix List — the part an agent needs to decide whether two URLs belong to the same owner. Returns scheme, host, port, path, decoded quer… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/geo/distance Distance and direction between WGS-84 coordinates: geodesic distance by Vincenty with a haversine fallback, initial and final bearing, the midpoint, and the destination point reached from a start point on a given bearin… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/geo/geohash Encode a WGS-84 latitude and longitude to a geohash at a chosen precision, or decode a geohash back to its bounding box, centre point and error bounds in metres. Encoding also returns the eight neighbouring cells, which… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/geo/pluscode Encode coordinates as an Open Location Code (plus code) at a chosen length, or decode a full code back to its bounding box and centre. Also shortens a full code against a reference coordinate and recovers a shortened co… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/geo/polygon Geometric predicates on a GeoJSON geometry supplied in the request: point-in-polygon with correct hole handling, bounding box, centroid, signed area in square metres, perimeter length, and ring winding order. Accepts Po… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/id/gs1 Validate and convert GS1 identifiers: GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13), GTIN-14, GLN and SSCC. Returns the check-digit verdict, the computed correct check digit, the GTIN-14 form with its indicator digit, and c… | Base | Media | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/id/iban Validate an IBAN: length for its country, permitted character classes per field, and the ISO 7064 mod-97-10 check digits. Returns the verdict with a specific failure reason, the electronic and print formats, and the dec… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/id/iban-build Construct an IBAN from a country code and the domestic account parts, computing the ISO 7064 mod-97-10 check digits. Takes either a single BBAN string or named parts (bank code, branch code, account number); digit field… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/id/national Validate a national identity, tax or company registration number against its country's official checksum rule. Covers 23 countries including NL BSN, ES NIF/NIE/CIF, IT codice fiscale, FR SIREN/SIRET, DE Steuer-ID, BE/PL… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/id/security Validate the check digit of a financial security identifier: ISIN (ISO 6166), CUSIP, SEDOL and FIGI. Returns the verdict, the computed correct check character, and for an ISIN the issuing country prefix and the embedded… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/num/allocate Split a money amount into shares without losing or inventing a cent. Divide evenly into N parts, or by a list of ratios, and the remainder is distributed one minor unit at a time by a named, deterministic rule — largest… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/num/radix Convert an integer between any two numeric bases from 2 to 36, with arbitrary precision so values far beyond 2^53 are exact. Accepts an optional sign and common prefixes (0x, 0b, 0o), validates every digit against the s… | Base | Media | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/num/stats Descriptive statistics for a supplied numeric array in one call: count, sum, mean, median, mode, variance and standard deviation with variance and standard deviation honouring ddof (default 1, the sample form; 0 gives t… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/num/words Spell a number out in words in English, Dutch, German, French, Spanish, Italian, Portuguese, Polish, Russian, Turkish, Swedish or Japanese, in cardinal, ordinal or currency form. Currency form agrees the number with the… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/ref/airport Look up an airport by IATA or ICAO code and get its name, city, country, ISO 3166-2 region code, WGS-84 coordinates, elevation and IANA time zone, or find the nearest airports to a coordinate within a radius. Covers eve… | Base | Commerce | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/ref/country Look up a country or territory by ISO 3166-1 alpha-2, alpha-3 or numeric code, or by name, and get the other codes, the official and common English names, the UN M49 region and sub-region, the currencies in use, the cou… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/ref/currency Look up a currency by its ISO 4217 alphabetic or numeric code: the official English name, minor-unit exponent, fund flag, the smallest cash denomination where it differs from the minor unit, the territories that use it,… | Base | Market data | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/ref/nuts Look up a NUTS statistical region of the European Union: resolve a NUTS code to its name, country and level, walk up to its parents or down to its children, or search regions by name. Covers all four levels (country, ma… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/text/similarity Compare two strings and return every standard similarity measure in one call: Levenshtein and Damerau-Levenshtein edit distance, normalised similarity, Jaro and Jaro-Winkler, longest common subsequence, Dice coefficient… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/text/slug Turn arbitrary text into a URL-safe slug. Decomposes accents, transliterates German umlauts, Scandinavian and Turkish letters, the ligatures that lose meaning under plain NFD, and Cyrillic (Russian, Ukrainian, Belarusia… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/text/transliterate Transliterate Cyrillic text into Latin using a named standard: ISO 9:1995 (one-to-one, with diacritics, covering the full standard: Russian, other Slavic, historic and non-Slavic Cyrillic letters) or BGN/PCGN, which is … | Base | Developer tools | $0.05 | 2026-10-02 |
https://api.duoleads.com/v1/text/unicode Analyse a string at the Unicode level: apply NFC, NFD, NFKC or NFKD, report which forms it is already in, list the scripts present (all Unicode scripts), and flag confusable and homoglyph characters — Cyrillic а in a La… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/time/business-days Business-day arithmetic with a caller-supplied calendar: add or subtract N working days from a date, or count the working days between two dates. The weekend is a weekday mask (Friday-Saturday and Sunday-only weeks work… | Base | Other | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/time/calendar Convert a Gregorian date to other calendar systems: Islamic (both the tabular civil calendar and the Umm al-Qura variant), Hebrew, Japanese imperial era, Republic of China, Buddhist and Persian. Also computes Easter Sun… | Base | Media | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/time/dst List the daylight-saving transitions for an IANA time zone over a date range: the exact instant of each shift, the offset before and after, and whether local clocks jump forward or back. Returns the current offset and D… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/time/rrule Expand an RFC 5545 recurrence rule into concrete occurrence timestamps. Accepts an RRULE string with DTSTART, an IANA time zone, and optional EXDATE and RDATE lists, and returns up to 200 occurrences as both local wall-… | Base | Developer tools | $0.05 | 2026-10-01 |
https://api.duoleads.com/v1/time/zone Convert an instant to wall-clock time in a named IANA time zone, or a wall-clock time in a zone back to an instant. Returns the local date and time, the UTC offset in ±HH:MM and seconds, the zone abbreviation, whether D… | Base | Developer tools | $0.05 | 2026-10-01 |
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.