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://chain.openverbs.com/v1/block Live block summary by number, hex, or tag (latest/earliest/pending/safe/finalized; default latest): number, hash, parent, timestamp (unix + ISO), transaction count, gas used/limit, base fee and miner. Reads live on-chai… | Base | Onchain data | $0.001 | 2026-09-27 |
https://crypto.openverbs.com/v1/price Crypto & token prices: live USD spot price for one or more coins/tokens by coin id — market coins (e.g. "coingecko:bitcoin", "coingecko:ethereum") or any ERC-20 by contract (e.g. "ethereum:0xdAC17..."). Real-time bitcoi… | Base | Market data | $0.001 | 2026-10-05 |
https://crypto.openverbs.com/v1/protocol Total value locked (USD) for one DeFi protocol by DefiLlama slug or name (e.g. "aave-v3", "lido", "uniswap-v3"): current TVL, per-chain TVL breakdown, 1h/1d/7d TVL change, category, chains, token symbol and market cap. … | Base | Onchain data | $0.001 | 2026-10-05 |
https://airport.openverbs.com/v1/airport Look up an airport by its 3-letter IATA code or 4-character ICAO code. Provide exactly one. Returns the airport name, both codes, city, country, coordinates, elevation and type. | Base | Commerce | $0.002 | 2026-09-06 |
https://airport.openverbs.com/v1/search Fuzzy-search airports by name, city or code, optionally filtered by ISO country code or airport type. Matches are ranked exact-code/name then prefix then substring, larger airports first. Empty result is a successful 20… | Base | Commerce | $0.002 | 2026-09-06 |
https://bitwise.openverbs.com/v1/analyze Inspect a non-negative integer's bit structure: bit length, set-bit count (population count), trailing-zero count, power-of-two test, and hex/binary representations. An optional width zero-pads the binary form. | Base | Developer tools | $0.002 | 2026-09-06 |
https://bitwise.openverbs.com/v1/and Bitwise AND across two or more non-negative integers (given as decimal strings, evaluated as arbitrary-precision BigInt). Returns the result in decimal, hex and binary. | Base | Developer tools | $0.002 | 2026-10-05 |
https://bitwise.openverbs.com/v1/not One's-complement NOT of a non-negative integer within an explicit bit width (two's-complement domain). The value must fit in `width` bits. Returns decimal, hex and binary. | Base | Identity | $0.002 | 2026-09-06 |
https://bitwise.openverbs.com/v1/or Bitwise OR across two or more non-negative integers (given as decimal strings, evaluated as arbitrary-precision BigInt). Returns the result in decimal, hex and binary. | Base | Developer tools | $0.002 | 2026-10-05 |
https://bitwise.openverbs.com/v1/rotate Circularly rotate a non-negative integer left or right within an explicit bit width (bits shifted off one end reappear at the other). The value must fit in `width` bits. Returns decimal, hex and binary. | Base | Other | $0.002 | 2026-09-06 |
https://bitwise.openverbs.com/v1/shift Shift a non-negative integer left or right by `amount` bits. A right shift is logical (fills with zeros). A left shift grows freely unless a `width` is given, in which case the result is masked to that width and the inp… | Base | Other | $0.002 | 2026-09-06 |
https://bitwise.openverbs.com/v1/xor Bitwise XOR across two or more non-negative integers (given as decimal strings, evaluated as arbitrary-precision BigInt). Returns the result in decimal, hex and binary. | Base | Developer tools | $0.002 | 2026-10-05 |
https://braille.openverbs.com/v1/decode Transcribe a Unicode braille string back to text, honouring capital and number signs. Non-braille or unmapped cells are clean 400s. | Base | Developer tools | $0.002 | 2026-09-06 |
https://braille.openverbs.com/v1/encode Transcribe text to Unicode braille (grade-1 / uncontracted English braille), with capital and number signs. Characters with no grade-1 representation are clean 400s. | Base | Developer tools | $0.002 | 2026-10-05 |
https://braille.openverbs.com/v1/from-dots Build braille cells from raised-dot numbers (each cell an array of 1–8). Out-of-range or repeated dots are clean 400s. | Base | Developer tools | $0.002 | 2026-10-05 |
https://braille.openverbs.com/v1/to-dots Break a braille string into its cells and the raised-dot numbers (1–8) of each cell. | Base | Developer tools | $0.002 | 2026-09-06 |
https://chain.openverbs.com/v1/address Native ETH / wallet balance for an address on any EVM chain: native balance (wei + ether), transaction count (nonce), and whether it's a contract or an externally-owned account (with deployed code size). Reads live on-c… | Base | Onchain data | $0.002 | 2026-09-27 |
https://chain.openverbs.com/v1/ens-records Read an ENS name's address plus its text records (avatar, url, email, description, com.twitter, com.github and more) in one call, live from the resolver on Ethereum mainnet. Pass `keys` to fetch specific records, or omi… | Base | Identity | $0.002 | 2026-09-27 |
https://chain.openverbs.com/v1/gas Live gas conditions for an EVM chain: current gas price, the latest block's base fee (EIP-1559) and the suggested max priority fee — all in both wei and gwei. Ground truth an agent can't compute. Reads live on-chain dat… | Base | Onchain data | $0.002 | 2026-10-05 |
https://chain.openverbs.com/v1/token Live ERC-20 metadata read directly from the contract: name, symbol, decimals and total supply (raw + decimal-formatted). Handles both string and legacy bytes32 name/symbol encodings. Returns `isToken:false` for EOAs or … | Base | Onchain data | $0.002 | 2026-09-27 |
https://chain.openverbs.com/v1/token-allowance Live ERC-20 spending allowance an owner has granted a spender: calls `allowance(owner, spender)` on the token and returns the raw amount, a decimal-formatted amount (using the token's decimals) with its symbol, and an `… | Base | Onchain data | $0.002 | 2026-09-27 |
https://chain.openverbs.com/v1/token-balance Live ERC-20 token balance held by a wallet: calls `balanceOf(address)` on the token contract and returns the raw balance plus a decimal-formatted amount (using the token's own decimals) with its symbol. Distinct from `a… | Base | Onchain data | $0.002 | 2026-09-27 |
https://checkdigit.openverbs.com/v1/ean Validate a GTIN barcode number — EAN-8, UPC-A (12), EAN-13 or GTIN-14 — by the standard mod-10 check digit. Length selects the scheme. | Base | Media | $0.002 | 2026-09-06 |
https://checkdigit.openverbs.com/v1/imei Validate a 15-digit mobile device IMEI by its Luhn check digit. Spaces and hyphens are ignored. | Base | Identity | $0.002 | 2026-09-06 |
https://checkdigit.openverbs.com/v1/isbn Validate an ISBN-10 (mod-11, trailing X allowed) or ISBN-13 (GTIN mod-10) book number. Length after removing spaces/hyphens selects the scheme. | Base | Developer tools | $0.002 | 2026-09-06 |
https://checkdigit.openverbs.com/v1/luhn Validate a number by the Luhn (mod-10) algorithm — the scheme behind credit/debit card numbers and many IDs. Spaces and hyphens are ignored. A mismatched check digit is a successful { valid: false }. | Base | Developer tools | $0.002 | 2026-09-06 |
https://checkdigit.openverbs.com/v1/routing Validate a 9-digit US ABA bank routing number by its weighted (3,7,1) mod-10 checksum. Spaces and hyphens are ignored. | Base | Developer tools | $0.002 | 2026-09-06 |
https://checksum.openverbs.com/v1/adler32 Adler-32 checksum (as used by zlib) over the input payload. Faster than CRC-32 but weaker for short inputs. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic. | Base | Developer tools | $0.002 | 2026-10-05 |
https://checksum.openverbs.com/v1/crc16 CRC-16 over the input payload in one of several standard variants (ccitt-false, xmodem, modbus, ibm; default ccitt-false). Returns the checksum as an unsigned integer and 4-digit hex. Non-cryptographic. | Base | Developer tools | $0.002 | 2026-10-05 |
https://checksum.openverbs.com/v1/crc32 CRC-32 (IEEE 802.3 polynomial, as used by zip, gzip and PNG) over the input payload. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic — for error detection only. | Base | Developer tools | $0.002 | 2026-10-05 |
https://checksum.openverbs.com/v1/fletcher Fletcher checksum over the input payload, in 16-bit (default) or 32-bit width. Returns the checksum as an unsigned integer and hex. Non-cryptographic. | Base | Developer tools | $0.002 | 2026-10-05 |
https://color.openverbs.com/v1/contrast Compute the WCAG 2.1 contrast ratio between two colors and whether it passes AA/AAA. | Base | Developer tools | $0.002 | 2026-09-06 |
https://color.openverbs.com/v1/convert Parse any CSS color and return it as hex, rgb, hsl, hwb, lab, lch and oklch. | Base | Developer tools | $0.002 | 2026-09-06 |
https://color.openverbs.com/v1/nearest-named Find the nearest CSS named color to a given color, by perceptual distance. | Base | Other | $0.002 | 2026-09-06 |
https://color.openverbs.com/v1/scheme Generate a harmony scheme (complementary, analogous, triadic, tetradic, monochromatic) from a base color. | Base | Other | $0.002 | 2026-09-06 |
https://creditcard.openverbs.com/v1/format Format a card number into the conventional display groups for its network (4-6-5 for Amex, 4-6-4 for 14-digit Diners, otherwise groups of four). | Base | Other | $0.002 | 2026-09-06 |
https://creditcard.openverbs.com/v1/generate Generate a random Luhn-valid TEST card number for the given network (default Visa). For testing only — these are not issued cards and cannot be charged. The response is always flagged `test:true`. | Base | Developer tools | $0.002 | 2026-09-12 |
https://creditcard.openverbs.com/v1/mask Mask a card number for display, keeping the first six and last four digits (the PCI-permitted maximum) and replacing the rest with a mask character (default `*`). | Base | Other | $0.002 | 2026-09-06 |
https://creditcard.openverbs.com/v1/network Detect the issuing network/brand (Visa, Mastercard, American Express, Discover, Diners Club, JCB, UnionPay, Maestro) from the card's IIN prefix, with the network's valid lengths. Returns `network:null` for an unrecogniz… | Base | Other | $0.002 | 2026-09-06 |
https://creditcard.openverbs.com/v1/validate Validate a payment-card number: Luhn check-digit test plus network detection and length check. A syntactically valid number that fails Luhn returns `valid:false` (a 200, not an error). | Base | Developer tools | $0.002 | 2026-09-06 |
https://crypto.openverbs.com/v1/categories Crypto categories & sectors ranked by total value locked (USD): each DeFi narrative (e.g. Dexes, Lending, Liquid Staking, Restaking, RWA) with its aggregate TVL, protocol count and share of total DeFi TVL. A map of wher… | Base | Onchain data | $0.002 | 2026-10-05 |
https://crypto.openverbs.com/v1/derivatives Crypto perpetual-futures data from on-chain perp DEXs: per market the funding rate (hourly + annualized %), open interest (USD and base units), mark & oracle price, 24h volume and 24h price change. Ranked by open intere… | Base | Market data | $0.002 | 2026-10-05 |
https://crypto.openverbs.com/v1/funding Live perpetual-futures funding rates per market — each market's funding rate as hourly, the standard 8-hour figure and annualized %, alongside mark price and open interest. Ranked by the most extreme (|annualized|) fund… | Base | Market data | $0.002 | 2026-10-05 |
https://crypto.openverbs.com/v1/orderbook Live L2 order book for a crypto perp market: aggregated bids and asks with price, size and resting-order count per level, plus the best bid/ask spread, spread % and mid price. Real-time market-depth snapshot for a coin … | Base | Market data | $0.002 | 2026-10-05 |
https://datetime.openverbs.com/v1/add Add an ISO 8601 duration to a start date or date-time and return the resulting UTC instant. Calendar-aware: months and years honor month lengths (e.g. Jan 31 + P1M clamps to the last day of February). A negative-signed … | Base | Other | $0.002 | 2026-09-06 |
https://datetime.openverbs.com/v1/between Compute the calendar breakdown (years, months, days, hours, minutes, seconds) between two ISO 8601 dates/date-times, plus exact totalSeconds. If end precedes start the result is flagged negative rather than erroring. | Base | Developer tools | $0.002 | 2026-09-06 |
https://datetime.openverbs.com/v1/business-days Add/subtract business days to a date, or count business days between two dates — skipping weekends and optional holidays. | Base | Other | $0.002 | 2026-09-06 |
https://datetime.openverbs.com/v1/convert Convert an ISO datetime into another timezone, with offset, weekday and Unix time. | Base | Developer tools | $0.002 | 2026-09-06 |
https://datetime.openverbs.com/v1/format Assemble an ISO 8601 duration string from individual components (years, months, weeks, days, hours, minutes, seconds) and an optional sign. All components must be non-negative and at least one must be non-zero. | Base | Developer tools | $0.002 | 2026-10-05 |
https://datetime.openverbs.com/v1/humanize Render an ISO 8601 duration as an English phrase, e.g. 'P1Y2M' → '1 year and 2 months'. Components are shown in descending order with correct pluralization. | Base | Media | $0.002 | 2026-09-06 |
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.