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/drug-recalls

    Search FDA drug recall / enforcement records (openFDA): recalling firm, classification (Class I/II/III), reason, distribution, and dates. Live FDA data, no key. ?q=losartan&limit=5

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • POST

    /api/evm-rpc

    Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover — one paid call, no node or API key of your own. Whitelisted methods only: eth_blockNumber, eth_gasPrice, eth_getBalance, eth_getTransa...

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • GET

    /api/fec-candidates

    Search US federal election candidates via the FEC: name, party, office (House/Senate/President), state, incumbent/challenger status, and FEC candidate ID. Live gov data. ?q=warren&limit=5

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • POST

    /api/feed-parse

    Fetch an RSS 2.0, Atom, or RSS 1.0 feed URL and parse it into normalized JSON: feed title/description/link plus items (title, link, id, published, author, plain-text summary, categories). Deterministic pure-XML parse with a lenient recovery pass f...

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • GET

    /api/fema-disasters

    Recent FEMA disaster declarations for a US state (openFEMA): title, incident type, declaration type, and date — the federal emergency picture by state, de-duplicated by disaster. Live gov data, no key. ?state=CA&limit=5

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • GET

    /api/food-recalls

    Search FDA food recall / enforcement records (openFDA): recalling firm, classification, reason (allergen, contamination, etc.), distribution, and dates. Live FDA data, no key. ?q=peanut&limit=5

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • POST

    /api/images-to-pdf

    Combine PNG/JPEG images into a single PDF, one image per page. Body: {"urls":["https://…/1.png","https://…/2.jpg"]}. Returns the PDF as base64.

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • POST

    /api/pdf-merge

    Combine several PDFs into one, in order. Body: {"urls":["https://…/a.pdf","https://…/b.pdf"]}. Returns the merged PDF as base64 plus page count and size.

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • POST

    /api/sql-guard

    Review a SQL statement an agent is about to run against production, and certify it. Returns a policy verdict (pass / warn / block) with named risks - unbounded UPDATE or DELETE, tautological WHERE, DROP, TRUNCATE, DROP COLUMN, statement stacking, ...

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • GET

    /api/vehicle-recalls

    NHTSA safety recalls for a vehicle by make/model/year: campaign number, affected component, summary, consequence, and remedy. Live gov data, no key. ?make=honda&model=accord&year=2019

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • GET

    /api/vin-decode

    Decode a vehicle VIN via NHTSA vPIC: make, model, year, trim, body class, engine, fuel, plant, and vehicle type. Accepts full or partial VINs (partial needs modelYear). Live gov data, no key. ?vin=1HGCM82633A004352

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • GET

    /api/x402-verify

    Confirm a USDC payment actually settled: given a tx hash (and network), returns whether it succeeded and the USDC transfers it contains (from, to, amount). Optionally check it paid a specific address at least a minimum amount. Read-only proof of p...

    as listed23h agoagent402.tools

    $0.004
    per call, USDC
    Try it
  • POST

    /api/a2a-card-fetch

    Discover and fetch a site's A2A (Agent2Agent protocol) Agent Card — tries /.well-known/agent-card.json then /.well-known/agent.json (or fetches a direct .json URL as-is) — and validate it against the spec v0.3 structural core. Returns the card, er...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Open below

    Call it from here

    POST /api/a2a-card-fetch

    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/a2a-card-fetch

{"url":"https://agent402.tools/samples/a2a-agent-card.json"}

    Declared inputsurl

    Listed at $0.005. 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/address-profile

    Explorer-grade profile of any address on any Blockscout-hosted chain: native balance, contract vs EOA, verification status, token/NFT flags, ENS, public tags — bought per call from Blockscout's Pro API over x402, no API key anywhere in the chain. ...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/b20-memos

    Payment memos attached to B20 transfers: pairs each Memo(address,bytes32) log with its Transfer at the previous log index (same tx, same token). Give a tx hash for one transaction, or scan a block window. Returns memoHex always and memoText when p...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/b20-new-tokens

    Recently deployed B20 tokens on Base: scans the factory's B20Created logs over a block window, locates each new token by its 0xB200 address prefix, and enriches it with live name/symbol/decimals eth_calls. ?blocks=50000&limit=25

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/b20-token-info

    ERC-20 metadata plus B20 signals for any Base address: name, symbol, decimals, total supply, best-effort paused/cap, bytecode size, and whether the address carries the factory-issued 0xB200 prefix. Works on plain ERC-20s too (isB20 comes back fals...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/b20-verify

    Boolean verdict with reasons: is this address a real factory-issued B20 on Base? Checks the 0xB200 address prefix, ERC-20 readability, and whether the B20 feature set is activated on the registry. ?address=0x…

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/barcode-lookup

    Look up a product by its UPC/EAN barcode number via Open Food Facts (open data): name, brand, category, quantity, and nutrition grade. Pairs with /api/barcode-decode (image → number → product). ?code=737628064502

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/bestsellers

    What agents actually pay for on a 500+ tool x402 catalog — the paid intelligence layer over Agent402's own sales ledger, the one demand signal that never reaches the chain (settlements are on-chain; WHICH tool was bought is not). The raw merchant ...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
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  • POST

    /api/cert-transparency

    Search public Certificate Transparency logs (via crt.sh) for every cert issued to a domain. Returns the cert list plus a deduped subdomain set extracted from the SANs — the fastest way to enumerate subdomains for a security audit. Free upstream, n...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • POST

    /api/contract-source

    Fetch the verified Solidity source files and compiler metadata for a contract address from Sourcify's open verification repository. Covers 8 EVM mainnets (ethereum, base, polygon, arbitrum, optimism, bsc, gnosis, celo). Contracts that were never v...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/demand-radar

    What agents want that no one is serving yet — the paid intelligence layer over Agent402's agent-demand board, for x402 sellers deciding what to build next. Ranks the aggregated wish clusters (searches that found nothing + explicit tool requests) a...

    as listed23h agoagent402.tools

    $0.005
    per call, USDC
    Try it
  • GET

    /api/dividend-calendar

    Market-wide ex-dividend calendar for a given date — every US-listed company going ex-dividend that day with dividend rate, indicated annual dividend, payment date, and record date. Optional `symbol` filter narrows to one ticker. Defaults to today ...

    as listed23h agoagent402.tools

    $0.005
    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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