Assay

agent402.tools

Utilities514 endpointsagent402.tools

Cryptographic hash of a text string. Algorithms: sha256 (default), sha512, sha1, md5. Returns hex and base64 digests.

Pays to C7IIHG7SPLPZ5H7ZT6HW3UV2OQMQQE6Y2HBNGZXSLRJULE42BEE2OY2XIE

Pays elsewhere2 rerouted · 22h ago2 above list8 of 514 failing
$0.001 – $1.50
USDC
Score
None yetno buyer reviews yet
Positive
None yetno buyer reviews yet
Paid calls
2,0894 distinct payers
Verified
22h ago506 of 514 as listed
On-chain
C7IIHG7S…OY2XIEpayout address on Algorand
All514With a finding8Free with proof of work12

514 of 514 endpoints

  • POST

    /api/mod-arithmetic

    Modular arithmetic operations: mod (a mod m), modpow (a^b mod m via fast exponentiation), and modinverse (a^-1 mod m via extended Euclidean algorithm). Uses BigInt for arbitrary precision. Useful for cryptography and number theory.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/morse

    Encode text to Morse code or decode it back. mode: encode (default) or decode. Words separated by ' / '.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/moving-average

    Compute simple (SMA) and exponential (EMA) moving averages over a numeric series. Returns one value per input position — the first (window-1) SMA values are null since there isn't enough history. EMA uses the standard alpha = 2/(window+1) smoothin...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/nato-phonetic

    Convert text to the NATO phonetic alphabet (Alpha, Bravo, Charlie...) or decode phonetic words back to text. Letters and digits supported. Word boundaries marked with " | ". Deterministic, pure CPU.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/nft-metadata

    Resolve the metadata for a single NFT: title, description, image URLs (original + cached CDN), attributes/traits, and the standard (ERC-721 vs ERC-1155). Useful when you have a contract+tokenId and need the display data without re-fetching the who...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/npv

    Compute the net present value of a stream of cashflows at a given discount rate. Index 0 is treated as t=0 (today, not discounted); indices 1..n are discounted by (1+rate)^t. Matches Excel's NPV but with the conventional t=0 treatment most finance...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Open below

    Call it from here

    POST /api/npv

    Assay builds the request this listing describes, sends it, and shows you exactly what comes back — including when what comes back is a complaint.

    The request, built from the listing

    POST https://agent402.tools/api/npv

{"cashflows":[-1000,300,400,500,600],"discountRate":0.1}

    Declared inputscashflowsdiscountrate

    Listed at $0.001. If it demands payment, you will see its live terms — this site cannot settle them.

    This page holds no key and cannot move money. Paid verification runs in an isolated worker with the only signing account, under the spend ceiling published in the methodology.

  • POST

    /api/number-format

    Format a number: thousands separators, fixed decimals, optional currency, or compact (1.2K / 3.4M).

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/onramp-link

    Generate a single-use Coinbase Onramp URL that lets a human fund any wallet with a card or Apple Pay — the fastest way to put real USDC into an agent's wallet. Returns the ready-to-open URL plus a fee-inclusive quote. Networks: base, ethereum, pol...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/outliers

    Flag outliers in a numeric series using either the IQR rule (Tukey fences at 1.5·IQR — robust, default) or z-score (|z| > threshold — assumes normality). Returns the outlier values + their indices + the thresholds used so you can decide whether to...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • GET

    /api/password

    free with PoW

    Generate cryptographically random passwords. ?length=8..128 (default 24), ?symbols=true|false (default true), ?count=1..20.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/password-strength

    Score a password's strength: character-set size, entropy bits, a 0–4 rating, and an estimated offline crack time. The password is never stored or logged.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/pbkdf2

    Derive a cryptographic key from a password using PBKDF2 (RFC 8018). Returns the hex-encoded derived key along with all parameters used, so you can store or verify them later. Supports sha1, sha256, sha384, sha512 digests.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/percentage

    Percentage helper. op: "of" (a% of b), "change" (% change a→b), "ratio" (a is what % of b).

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/phone-format

    Parse and format phone numbers into E.164 and national formats. Supports US (+1), UK (+44), DE (+49), FR (+33), AU (+61), IN (+91). Pure regex — no libphonenumber dependency.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/price-coingecko

    Live spot price (and optional 24-hour change) for one or more coins from CoinGecko's public Simple Price endpoint. Identify coins by their CoinGecko ID slug (bitcoin, ethereum, solana, usd-coin, …). Defaults to USD; pass a `vsCurrency` to denomina...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/price-pyth

    Latest aggregated price for one or more Pyth feeds, sourced live from Pyth's Hermes service. Identify feeds by hex feed-id (preferred — full precision) or by a small set of well-known aliases (BTCUSD, ETHUSD, SOLUSD, USDC, USDT). Each feed returns...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/prime-factorize

    Find the prime factorization of an integer via trial division. Returns the list of prime factors (with repeats), a human-readable factorization string, whether the number is prime, and the count of distinct prime factors. Limit: numbers up to 10^15.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/punycode-convert

    Convert an internationalized domain name to Punycode (ASCII-compatible encoding, RFC 3492) or decode Punycode back to Unicode. Uses Node.js built-in IDNA support. Deterministic, pure CPU.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/querystring

    Parse a URL query string into an object, or build one from an object. mode: parse (default) | build.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • GET

    /api/random

    free with PoW

    Cryptographically secure randomness. ?bytes=1..1024 returns hex; or ?min=&max= returns a uniform integer; ?count=1..100.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/readability-score

    Compute Flesch-Kincaid Grade Level, Flesch Reading Ease, Gunning Fog Index, and Automated Readability Index from text. Returns all 4 scores plus word, sentence, and syllable counts.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/regex

    Run a regular expression against text. Returns up to 100 matches with index and capture groups. Pattern ≤ 200 chars, text ≤ 10KB.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/relative-time

    Format a timestamp as a human relative phrase ("3 hours ago", "in 2 days") versus now or a reference time.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/roman

    Convert an integer (1-3999) to Roman numerals, or a Roman numeral back to an integer. Auto-detects direction.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it

Buyer reviews

none yet · a review costs a settlement

Nobody has bought from agent402.tools through an address that came back to write about it. Rather than print an empty box, this page hands the position to the evidence it does have — Assay’s own verification record, immediately below.

  1. 01

    Pay the merchant

    Call one of their endpoints and settle the 402 challenge in USDC on Algorand mainnet. That transfer is the whole credential.

  2. 02

    Sign the settlement

    Connect the address that sent it and sign a message naming this merchant, that transaction and your score. Assay stores no account and no password.

  3. 03

    The receipt travels with it

    Your review renders with its transaction id linked to the public explorer, so anyone can re-derive that you were a customer. One settlement buys one review.

Assay’s own prober is barred from reviewing, and the exclusion is a row in the database rather than a claim in a footer. Own this payout address? Claim the listing

Verification record

last sweep 22h ago · 514 of 514 covered

Nobody has reviewed agent402.tools yet — a review attaches to a payout address and opens once a buyer has settled with it, because a settlement is the only thing that proves a reviewer was a customer. Until then this is the evidence Assay has: calls it made itself, and what came back.

What the last sweep found

answered as listed
506 answered as listed
answered, but not as listed
8 answered, but not as listed
  • Pays elsewhere2 endpoints
    • /api/route/execute
    • /api/route/execute-max
  • Price mismatch6 endpoints
    • /api/stock-quotelists $0.01, demands $0.003
    • /api/skill/domain-intellists $0.25, demands $0.075
    • /api/answerlists $0.03, demands $0.08
    • and 3 more

List every endpoint with a finding · checked 22h ago

Settled payments

Delivered for free, on proof of work

12 of this merchant’s endpoints accept a few milliseconds of CPU instead of money. Assay solved the puzzle and got real content back, which turns “it challenged for payment” into “it actually delivers” at no cost — and you can reproduce it from the endpoint list.

List the 12 you can call for nothing

Also in utilities

See the whole category