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

  • GET

    /api/country-info

    free with PoW

    Country facts by name or ISO code: official name, capital, region, currencies, languages, timezones, dialing code, TLD, and more. Committed open dataset (world-countries, ODbL, plus the IANA timezone country map) — offline and deterministic. ?name...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/cron-next

    Parse a 5-field cron expression and return the next N run times (UTC).

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/csv-to-json

    Parse CSV (quoted fields supported) into a JSON array of objects, using the first row as headers (header=false for arrays).

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/csv-to-md

    Convert CSV into a GitHub-flavored Markdown table (first row is the header).

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/dex-pool

    Read on-chain state of a Uniswap V3 pool: token0/token1 addresses + decimals, fee tier, current sqrtPriceX96, tick, in-range liquidity, and the decoded human-readable spot price (token1 per token0). One $0.002 call replaces ~6 RPC roundtrips on th...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/dex-quote

    Spot quote for swapping through a Uniswap V3 pool at the current tick. amountIn is in human units (not wei). zeroForOne=true sends token0 → token1; false sends token1 → token0. Returns amountOut net of the pool's fee tier. NOTE: this is a single-t...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/eas-attestations

    List EAS (Ethereum Attestation Service) attestations for an address as recipient, attester, or either, on mainnet/Base/Optimism/Arbitrum/Sepolia. Returns attestation id, attester, recipient, schema id, revocable/revoked flags, timestamp, and decod...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/email-validate

    Validate an email address: syntax check plus live MX record lookup on the domain (deliverability signal, not a guarantee).

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/ens-bulk-resolve

    Reverse-resolve a batch of Ethereum addresses to ENS primary names + avatar URLs (up to 50 per call). Returns one row per address with name (or null), displayName (with checksum if no name), and avatar URI. Use to label transaction lists, wallet l...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • GET

    /api/erc721-owner

    Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint failover. ?contract=0x…&tok...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/eth-call

    Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, eth_blockNumber, etc.). Muta...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/extract-entities

    Pull emails, URLs, IPv4s, @mentions, and #hashtags out of free text. Returns deduped lists.

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/farcaster-by-address

    Reverse-lookup an Ethereum address to its Farcaster account (via verified address). Returns FID, username, display name, bio, follower/following counts, and Warpcast URL, or found=false if the address has not verified on Farcaster. Use to label wa...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/farcaster-profile

    Lookup a Farcaster profile by username or FID. Returns FID, username, display name, bio, profile picture URL, follower/following counts, and the canonical Warpcast URL. Use to label cast authors, validate a Farcaster handle, or fetch a profile for...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • GET

    /api/gas-estimate

    Current gas price (gwei and wei) on Base, Polygon, Arbitrum, Optimism, Ethereum, or Robinhood Chain — for an agent budgeting a transaction. Read-only. ?network=base

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/gravatar-check

    Check whether an email address has a Gravatar: hashes the normalized email (MD5, pure CPU — the raw address is never sent upstream), probes gravatar.com for an avatar, and fetches the public profile when one exists (display name, username, profile...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/html-to-markdown

    Convert an HTML fragment or document you already have into clean markdown. (To fetch + convert a live URL, use /api/extract.)

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/ics-parse

    Parse iCalendar (.ics) text into structured JSON events: summary, start/end, location, organizer, attendees, status, and RRULE. Optional bounded recurrence expansion (expand:true, capped occurrences). Deterministic, pure CPU — send the ICS text, n...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/ip-info

    Classify an IP address: version, public/private/loopback/link-local, integer form, and reverse-DNS (PTR) lookup.

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/json-diff

    Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/json-schema-infer

    Infer a draft-07 JSON Schema from sample JSON document(s). Send one sample as json, or several as samples. Heuristic merge rules: required = keys present in every sample, conflicting types become a type union, integer widens to number, and string ...

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/json-to-csv

    Convert a JSON array of objects to CSV. Nested objects are flattened to dot-path columns.

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/json-to-yaml

    Convert JSON to YAML.

    as listed23h agoagent402.tools

    $0.002
    per call, USDC
    Try it
  • POST

    /api/json-validate

    Validate a JSON document against a JSON Schema (draft-07 subset) and get the list of violations. Supports type, required, properties, items, enum, const, min/max, length, pattern, format, anyOf/allOf/oneOf/not, additionalProperties. Deterministic ...

    as listed23h agoagent402.tools

    $0.002
    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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