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

  • GET

    /api/dns

    DNS lookup for a domain. Supported record types: A, AAAA, MX, TXT, NS, CNAME.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/duration

    Parse a duration like "2h30m" / "1d4h" / "90s" to seconds, or humanize a number of seconds.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Open below

    Call it from here

    POST /api/duration

    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/duration

{"value":"2h30m"}

    Declared inputsvalue

    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/easter-date

    Compute the date of Easter Sunday for a given year using the Anonymous Gregorian algorithm (Meeus/Jones/Butcher). Also returns Good Friday, Ash Wednesday, Palm Sunday, Pentecost, and the day-of-year for Easter.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/effective-annual-rate

    Convert a nominal annual rate (APR) compounded m times per year into the effective annual rate (EAR / APY): (1 + apr/m)^m - 1. Set continuous:true for e^apr - 1.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/epoch-convert

    Convert between Unix epoch timestamps and ISO 8601 date strings in both directions. Provide either an epoch (seconds or milliseconds) or an ISO date string. Returns both representations plus UTC and date components.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/forecast-eval

    Backtest a forecasting method on the input series by holding out the last `testSize` observations, forecasting them, and computing MAPE (mean absolute percentage error) + RMSE (root mean squared error). Lets an agent pick which method (mean / naiv...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/forecast-holt

    Holt's linear trend method — level + trend (no seasonality). Two smoothing parameters: alpha (level) and beta (trend). Forecast extrapolates as a straight line from the last fitted level along the last fitted trend, so it grows or shrinks linearly...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/forecast-holt-winters

    Holt-Winters triple exponential smoothing — level + trend + seasonal component. Use for series with a repeating cycle (weekly retail traffic, monthly utility usage, quarterly revenue). Additive seasonality (constant amplitude) or multiplicative (a...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/forecast-naive

    Three textbook baseline forecasts: mean (forecast = average of history), naive (forecast = last value), drift (linear extrapolation from first to last point). Use as a sanity floor — any sophisticated method (SES, Holt, Holt-Winters) should beat t...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/forecast-ses

    Simple exponential smoothing (SES) — level-only forecast for series without trend or seasonality. Higher alpha (closer to 1) tracks recent values aggressively; lower alpha (closer to 0) smooths through noise. Default alpha=0.3 is a common conserva...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/gcd-lcm

    Compute the greatest common divisor (Euclidean algorithm) and least common multiple of two positive integers. Also reports whether the two numbers are coprime (GCD = 1).

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/geo-distance

    Great-circle distance between two latitude/longitude points using the haversine formula. Returns kilometers and miles. Deterministic.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/group-by

    Group an array of objects by one or more keys and aggregate a numeric field — count (default), sum, avg, min, or max. The SQL GROUP BY agents reach for when wrangling JSON. Deterministic (groups in first-seen order).

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/gunzip

    Decompress a base64-encoded gzip payload. Returns the result as utf8 (text) or base64 (binary). Refuses to expand past 10MB to defend against zip bombs.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/gzip

    Compress a string with gzip (RFC 1952) and return it as base64. Reports input bytes, output bytes, and the compression ratio so you can decide if it was worth doing. Input can be plain text (utf8) or already-binary content (base64 or hex).

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/hash

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

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/hex

    Hex encode or decode text. mode: encode (default) or decode.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/hkdf-expand

    HKDF extract-then-expand (RFC 5869) — derive output keying material from initial keying material, an optional salt, and an optional info/context string. Useful for deriving multiple keys from a single shared secret. Returns hex-encoded OKM.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/hmac

    HMAC signature of a message with a shared key. Algorithms: sha256 (default), sha512, sha1. Returns hex and base64.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/html-entities

    Encode text to HTML entities or decode them back. mode: encode (default) or decode.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/html-links

    Enumerate every <a href> in an HTML string with its anchor text and rel attribute. Optionally resolves relative hrefs against a base URL and filters by a regex on the href. The deterministic way to crawl a page's outlinks without writing a regex.

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/html-meta

    Extract <title>, <meta description>, OpenGraph/Twitter cards, canonical URL, and JSON-LD blocks from an HTML string. Distinct from /api/meta which fetches a URL — feed this the HTML you already have (from /api/render, /api/extract.body, or your ow...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/html-select

    Run a CSS selector against an HTML string and return the matches (text, attrs, and optionally outerHTML for each). The deterministic alternative to regex when you already have the HTML and know the selector — pairs with /api/render or any page you...

    as listed22h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/html-strip

    Strip all HTML tags and return plain text. Preserves block-level structure (paragraphs and headings become newline-separated). Faster and more predictable than running extract on a raw HTML string when you already have it.

    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