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 · 23h 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
23h 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/html-table

    Extract a <table> from an HTML string as JSON rows (header-keyed) or CSV. Useful for prices, schedules, sports stats, or anything an agent has already fetched as HTML. If multiple tables match, the first is used.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/iban-validate

    Validate an IBAN: country code, length, and the ISO 13616 mod-97 checksum.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/ipv6-expand

    Expand a compressed IPv6 address to full 8-group notation (:: to 0000:...) or compress a full address by collapsing the longest zero run. Also validates format. Pure CPU, deterministic.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/irr

    Compute the internal rate of return (IRR) of a cashflow stream — the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods. Solved via Newton-Raphson w...

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/isbn-validate

    Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
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  • POST

    /api/iso-week

    Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Open below

    Call it from here

    POST /api/iso-week

    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/iso-week

{"date":"2026-06-23"}

    Declared inputsdate

    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/jaccard-similarity

    Compute the Jaccard similarity coefficient between two strings using character bigrams or word tokens. Returns the ratio of intersection to union (0 = no overlap, 1 = identical sets). Deterministic, pure CPU.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/json-flatten

    Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/json-format

    Validate, pretty-print, or minify JSON. Returns parse errors with position when invalid.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/json-merge

    Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/json-pointer

    Resolve an RFC 6901 JSON Pointer (e.g. /items/0/name) against a JSON value. Returns the value or found:false.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/json-query

    Extract a value from JSON by dot/bracket path, e.g. "items[2].name".

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/json-to-xml

    Convert a JSON value to indented XML — the reverse of xml-to-json. Objects become nested elements, arrays repeat their tag, and text is escaped. Deterministic.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/jsonl

    Convert between a JSON array and JSONL/NDJSON (one JSON object per line). mode: to-jsonl (array → lines) or from-jsonl (lines → array). For streaming records to and from agents and datasets.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/jwt-decode

    Decode a JWT without verification: header, payload, expiry status, and time remaining. (Decoding only — signatures are NOT verified.)

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/jwt-sign

    Mint a signed JSON Web Token (HMAC: HS256 default, HS384, HS512) from a payload + secret. Pairs with jwt-decode/jwt-verify to complete the trio. Deterministic — same payload, secret, and alg always produce the same token.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/leap-year

    Check whether a year is a leap year and get related info: days in that year, the next and previous leap years, and the Gregorian leap-year rule.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/levenshtein

    Levenshtein edit distance between two strings, plus a 0-1 similarity ratio.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
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  • POST

    /api/linear-regression

    Fit a least-squares line y = slope·x + intercept to two equal-length series. Returns slope, intercept, r² (variance explained), and optionally predicted y values for new x inputs — useful for trend extrapolation (e.g. project next quarter's revenu...

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/loan-payment

    Compute the monthly (or per-period) payment on a fully-amortizing loan: mortgage, auto, student loan, business loan. Returns the periodic payment, total paid over the term, and total interest. Matches Excel's PMT(rate, nper, -principal). Use this ...

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • GET

    /api/lorem

    free with PoW

    Placeholder text. ?paragraphs=1..20 or ?words=1..2000.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • GET

    /api/lorem-ipsum

    free with PoW

    Generate placeholder lorem ipsum text. Supports paragraphs or sentences mode with configurable counts. Uses a fixed vocabulary and deterministic assembly.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • POST

    /api/matrix-multiply

    Standard matrix multiplication of two 2D arrays: A[m×k] × B[k×n] → C[m×n]. Validates that inner dimensions match. Each dimension is capped at 100.

    as listed23h agoagent402.tools

    $0.001
    per call, USDC
    Try it
  • GET

    /api/mime

    free with PoWpaid receipt

    Look up a MIME type by file extension (?ext=png) or extensions by MIME type (?type=image/png). Covers ~50 common types.

    as listed23h 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 23h 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 23h 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

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