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://format.openverbs.com/v1/detect Sniff which structured format an unknown document is. Because formats overlap, returns every plausible format with a 0–1 score plus the best guess — honest about ambiguity rather than pretending certainty. | Base | Other | $0.004 | 2026-10-02 |
https://format.openverbs.com/v1/infer-schema Infer a JSON Schema (draft-07) from a sample document in any supported format. Types are inferred, present keys are marked required, and heterogeneous array item schemas are merged. The result validates out of the box w… | Base | Developer tools | $0.004 | 2026-09-06 |
https://format.openverbs.com/v1/validate Parse a document (json, json5, jsonc, yaml, xml, csv, tsv, toml, ndjson, ini, env, properties, plist or querystring) and validate it against a JSON Schema. Returns whether it is valid and a list of precise, path-tagged … | Base | Developer tools | $0.004 | 2026-09-06 |
https://geometry.openverbs.com/v1/circle Diameter, circumference and area of a circle from its radius. | Base | Other | $0.004 | 2026-10-02 |
https://geometry.openverbs.com/v1/distance Euclidean, Manhattan and Chebyshev distance between two 2-D points. | Base | Other | $0.004 | 2026-10-02 |
https://geometry.openverbs.com/v1/polygon Area (shoelace formula), perimeter and centroid of a simple polygon given its vertices in order. Vertices are treated as a closed ring (last connects to first). | Base | Other | $0.004 | 2026-10-02 |
https://geometry.openverbs.com/v1/rectangle Area, perimeter and diagonal of a rectangle from its width and height. | Base | Other | $0.004 | 2026-10-02 |
https://geometry.openverbs.com/v1/triangle Area (Heron's formula), perimeter and interior angles of a triangle from its three side lengths. Sides that violate the triangle inequality are rejected as a clean 400. | Base | Other | $0.004 | 2026-10-02 |
https://iban.openverbs.com/v1/bic Validate a BIC/SWIFT code and decompose it into bank, country, location and branch codes. | Base | Developer tools | $0.004 | 2026-10-02 |
https://iban.openverbs.com/v1/validate Validate an IBAN (mod-97 checksum, length, country format) and decompose it into country, bank, branch and account parts. | Base | Developer tools | $0.004 | 2026-10-02 |
https://jsonschema.openverbs.com/v1/infer Infer a JSON Schema (draft-07) from an example value, walking objects and arrays recursively. Set detectFormat=true to tag strings that look like date-time/date/email/uri/uuid, requireAll=false to leave object propertie… | Base | Developer tools | $0.004 | 2026-10-02 |
https://jsonschema.openverbs.com/v1/validate Validate a JSON value against a JSON Schema (draft-07, with the standard string formats enabled). An invalid schema is rejected as a clean 400 before payment; a valid schema that the data simply fails to satisfy is a su… | Base | Developer tools | $0.004 | 2026-10-02 |
https://jwt.openverbs.com/v1/decode Decode a JSON Web Token WITHOUT verifying its signature and return the header, payload and signature. A structurally malformed token is rejected before payment. Never trust a decoded payload you have not verified. | Base | Developer tools | $0.004 | 2026-09-06 |
https://jwt.openverbs.com/v1/sign Mint a signed JSON Web Token from a JSON claims object, using a shared secret (HS*) or a PEM private key (RS/ES/PS). Supports expiresInSec, notBeforeSec, issuer, audience, subject and keyid. An unusable key or option is… | Base | Developer tools | $0.004 | 2026-10-02 |
https://jwt.openverbs.com/v1/verify Verify a JSON Web Token's signature and claims against a shared secret (HS*) or a PEM public key (RS/ES/PS). Returns { valid, payload } on success or { valid: false, reason } for a bad signature, expired/not-yet-active … | Base | Developer tools | $0.004 | 2026-09-06 |
https://math.openverbs.com/v1/eval Evaluate a mathematical expression with optional named variables — arithmetic, comparison and logic operators plus functions like sqrt, abs, min, max, sin, cos, log, floor, round, etc. A syntax error, an undefined varia… | Base | Other | $0.004 | 2026-09-06 |
https://math.openverbs.com/v1/variables Parse an expression and return the free variables it references, without evaluating it — so an agent can discover which inputs a formula needs before supplying values. A syntax error is a clean 400. | Base | Developer tools | $0.004 | 2026-10-02 |
https://matrix.openverbs.com/v1/determinant Compute the determinant of a square matrix via Gaussian elimination with partial pivoting. A non-square, ragged or empty matrix is a clean 400; a singular matrix simply returns 0. | Base | Developer tools | $0.004 | 2026-10-02 |
https://matrix.openverbs.com/v1/inverse Invert a square matrix via Gauss-Jordan elimination. A non-square, ragged or empty matrix is a clean 400. A singular (non-invertible) matrix is NOT an error — it returns a successful { invertible:false, inverse:null }. | Base | Other | $0.004 | 2026-10-02 |
https://matrix.openverbs.com/v1/multiply Multiply two matrices A·B. The inner dimensions must agree (columns of A equal rows of B); a mismatch or a ragged/empty matrix is a clean 400. | Base | Other | $0.004 | 2026-10-02 |
https://matrix.openverbs.com/v1/solve Solve the linear system A·x = b for a square coefficient matrix A and vector b via Gaussian elimination with partial pivoting. A non-square A or a b of the wrong length is a clean 400. A singular system is NOT an error … | Base | Other | $0.004 | 2026-10-02 |
https://matrix.openverbs.com/v1/transpose Transpose a matrix, swapping rows and columns. A ragged/empty matrix is a clean 400. | Base | Other | $0.004 | 2026-10-02 |
https://mcpscan.openverbs.com/v1/scan Statically analyse a Model Context Protocol (MCP) server manifest for security risks. Tool descriptions enter the model context, a prime prompt-injection vector. Deterministic and offline (inline manifest). Flags danger… | Base | Security | $0.004 | 2026-09-06 |
https://numtheory.openverbs.com/v1/factorize Prime-factorize a positive integer (≤ 10^15 so the computation is always fast). Returns the prime factors with exponents, the divisor count, and whether n is prime. | Base | Other | $0.004 | 2026-10-02 |
https://numtheory.openverbs.com/v1/gcd Greatest common divisor of two or more non-negative integers (arbitrary precision). | Base | Other | $0.004 | 2026-10-02 |
https://numtheory.openverbs.com/v1/is-prime Miller-Rabin primality test (with witnesses that are exact for all 64-bit integers) on an arbitrary-precision integer. Returns { prime }. | Base | Developer tools | $0.004 | 2026-10-02 |
https://numtheory.openverbs.com/v1/lcm Least common multiple of two or more positive integers (arbitrary precision). | Base | Other | $0.004 | 2026-10-05 |
https://numtheory.openverbs.com/v1/modpow Compute (base ^ exponent) mod modulus efficiently for arbitrary-precision integers. The modulus must be positive. | Base | Developer tools | $0.004 | 2026-10-05 |
https://numtheory.openverbs.com/v1/totient Euler's totient φ(n) — the count of integers in [1, n] coprime to n — for a positive integer ≤ 10^15 (it is computed from the prime factorization). | Base | Other | $0.004 | 2026-10-05 |
https://otp.openverbs.com/v1/hotp Generate an RFC 4226 counter-based HMAC one-time password from a base32 secret and counter. Configurable digits (6–10, default 6) and algorithm (SHA1/SHA256/SHA512, default SHA1). An invalid base32 secret is a clean 400. | Base | Other | $0.004 | 2026-10-05 |
https://otp.openverbs.com/v1/totp Generate an RFC 6238 time-based one-time password from a base32 secret. Uses the current time by default, or an explicit unix timestamp (seconds); configurable period (default 30s), digits (default 6) and algorithm (def… | Base | Other | $0.004 | 2026-10-05 |
https://otp.openverbs.com/v1/uri Build an otpauth:// provisioning URI (the string encoded in authenticator QR codes) for a totp or hotp secret. Includes label, issuer, algorithm, digits and period (totp) or counter (hotp). The secret must be valid base… | Base | Media | $0.004 | 2026-10-05 |
https://otp.openverbs.com/v1/verify Verify a submitted TOTP code against a base32 secret, scanning ±window time steps (default ±1) to tolerate clock drift. Returns valid plus the matching step offset (delta). A code that does not match is a successful res… | Base | Security | $0.004 | 2026-10-05 |
https://pack.openverbs.com/v1/decode Decode a MessagePack or CBOR byte stream (supplied as a base64/base64url/hex string) back into a JSON value. A malformed envelope, malformed bytes, or a value that is not JSON-representable is rejected before payment. | Base | Developer tools | $0.004 | 2026-09-06 |
https://pack.openverbs.com/v1/encode Serialize a JSON value into a compact MessagePack or CBOR byte stream, returned as a base64 (default), base64url or hex string, along with the byte length. | Base | Developer tools | $0.004 | 2026-10-05 |
https://physics.openverbs.com/v1/constant Look up a physical constant by its key (e.g. "speed-of-light"), symbol (e.g. "c") or exact name. Returns the CODATA 2018 recommended value, unit, relative standard uncertainty (0 for values that are exact by SI definiti… | Base | Other | $0.004 | 2026-09-06 |
https://physics.openverbs.com/v1/list List every physical constant in the dataset, or only those in a given category (universal, adopted, electromagnetic, atomic, physico-chemical). Returns the constants, the total count and the set of available categories. | Base | Other | $0.004 | 2026-10-02 |
https://physics.openverbs.com/v1/search Search the constants table by key, symbol or name substring. Exact matches rank first, then prefix matches, then substring matches. Returns up to `limit` constants (default 20) plus the total match count. | Base | Search | $0.004 | 2026-10-05 |
https://qr.openverbs.com/v1/barcode Render a barcode (Code128, Code39, EAN-13/8, UPC-A/E, ITF-14, DataMatrix, PDF417) as SVG or PNG data URL. | Base | Media | $0.004 | 2026-10-05 |
https://qr.openverbs.com/v1/decode Read the text out of a QR code or barcode in a PNG or JPEG image. Auto-detects QR, DataMatrix, PDF417, Aztec and 1D symbologies (Code128/39/93, EAN-13/8, UPC-A/E, ITF, Codabar). A valid image with no code returns { foun… | Base | Media | $0.004 | 2026-09-06 |
https://qr.openverbs.com/v1/qr Render text (URL, vCard, Wi-Fi config, …) as a QR code — SVG string or PNG data URL. | Base | Media | $0.004 | 2026-10-05 |
https://regex.openverbs.com/v1/match Find the first match (or all matches with all=true) of a RE2 pattern, returning each match's text, start/end offsets, and numbered and named capture groups. No match is a successful 200 with an empty match list. | Base | Developer tools | $0.004 | 2026-09-06 |
https://regex.openverbs.com/v1/replace Replace matches of a RE2 pattern with a replacement string. Replaces all matches by default (set all=false for first-only). The replacement may reference capture groups with $1, $2 or ${name}. Returns the resulting stri… | Base | Developer tools | $0.004 | 2026-09-06 |
https://regex.openverbs.com/v1/split Split the input into parts on each match of a RE2 pattern. An optional limit caps the number of parts (0 = unlimited). Returns the parts array and its count. | Base | Other | $0.004 | 2026-09-06 |
https://regex.openverbs.com/v1/test Test whether a RE2 pattern matches anywhere in the input. Returns { matched }. RE2 guarantees linear-time evaluation, so this is safe against catastrophic backtracking. An invalid pattern is a clean 400; no match is a s… | Base | Developer tools | $0.004 | 2026-09-06 |
https://scan.openverbs.com/v1/detect Find personally identifiable information in a text blob: emails, phone numbers, credit cards (Luhn-validated), IBANs (mod-97 validated), IPv4/IPv6 addresses, US SSNs and JWTs. Returns every match with its type and chara… | Base | Developer tools | $0.004 | 2026-10-05 |
https://scan.openverbs.com/v1/redact Return the input text with every detected PII span replaced. `mode` controls the replacement: "label" (default) → `[EMAIL]`; "mask" → the value covered with a mask character; "hash" → `[EMAIL:1a2b3c4d]`, a stable per-va… | Base | Developer tools | $0.004 | 2026-10-05 |
https://scan.openverbs.com/v1/secrets Scan source code or configuration text for hardcoded secrets: AWS access keys, GitHub/Slack/Google tokens, Stripe and OpenAI keys, PEM private-key blocks, JWTs and high-entropy secret assignments. Placeholder values are… | Base | Developer tools | $0.004 | 2026-10-05 |
https://similarity.openverbs.com/v1/damerau Damerau-Levenshtein distance — like Levenshtein but also counts adjacent transpositions as a single edit — plus a normalized similarity in [0,1]. | Base | Other | $0.004 | 2026-10-05 |
https://similarity.openverbs.com/v1/dice Sørensen-Dice similarity coefficient in [0,1] over character bigrams — robust to word order and minor edits. | Base | Developer tools | $0.004 | 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.