Every agent-payable API.

Web scraper: fetches any URL through a proxy and returns its status, content type and raw HTML

Enqueues a web_scraper_scrape_url job and returns a task id immediately

Web scraper to Markdown: fetches a URL and returns its main article content as clean Markdown

Web search API: searches the web through a proxy and returns result titles, URLs and snippets

Enqueues a websearch_search_web job and returns a task id immediately

Use when an agent needs what a Base address holds in one call instead of one RPC call per token. Input: address; optional tokens (up to 20 ERC-20 addresses, comma-separated; default USDC, EURC, USDbC, WETH, cbBTC, cbETH, wstETH). Output: JSON block+time, ETH balance, per-token symbol, decimals, raw and decimal balance, nonce, isContract. Chain state only, no prices. Bad input: 400, not charged. Example: ?address=0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1

Use when an agent must vet a Base ERC-20 before buying or integrating it. Input: address. Output: JSON risk signals with block+evidence: proxy+admin, owner (renounced/EOA/contract/undeclared), mint/pause/blacklist/fee selectors, Uniswap v2/v3/v4 (incl. hooked launch pools, hook permissions) + Aerodrome pools, buy/sell simulation, notChecked. Signals, not a safe verdict. Bad input/EOA: 400, not charged. Example: ?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Use when you need official Bank of Korea statistics (base rate, money supply, key indicators) as a time series. Input: stat (ECOS table code, e.g. 722Y001), cycle (A/S/Q/M/SM/D), start, end (period format of cycle), optional item (e.g. 0101000). Output: JSON series with English labels, units, observations [{period,value}] (max 1,000 rows) and source attribution. Only BOK-authored tables are served. Example: ?stat=722Y001&cycle=M&start=202401&end=202412&item=0101000

Use when an agent must confirm a Base transaction or payment landed: did it succeed, who paid whom, how much of which token. Input: hash. Output: JSON status (success/reverted), block+time, confirmations, from, to, ETH value, fee (L2 gas + L1 data fee), decoded ERC-20 transfers with symbol and decimal amount (first 25). Unknown or unmined hash: 404, not charged. Example: ?hash=0x284f8abed91b5631ee28bdb1ccfe78374e18c480cb2ab25f28e3bfac5210fe0b

24-hour ticker stats for a Coinbase spot pair: last price, open, high, low, % change, base and USD volume, 30-day volume, and current bid/ask.

Business Frameworks business-frameworks/value/band/25-50m@1.0 — Value $25–50M: value is position. Call when an agent needs how value behaves at this revenue scale, for a business it is running or advising. Returns 250 tokens of original synthesis with public citations and child handles; free layer at /catalogue.

Business Frameworks business-frameworks/growth/band/25-50m@1.0 — Growth $25–50M: a scope decision. Call when an agent needs how growth behaves at this revenue scale, for a business it is running or advising. Returns 300 tokens of original synthesis with public citations and child handles; free layer at /catalogue.

Estimates current gas prices and EIP-1559 fees on Base, Ethereum, Optimism, and Arbitrum.

Current weather conditions for any coordinate worldwide. Pass lat + lon (and optional units=metric|imperial, default metric). Returns temperature, feels-like, humidity, precipitation (rain/snow), cloud cover, sea-level pressure, wind speed/direction/gusts, day/night flag, and a human-readable conditions label from the WMO weather code — with local time + timezone. Global coverage (not just US — for US-only NWS data see weather.zip / weather.forecast). Source: Open-Meteo (CC BY 4.0).

Get a cleaned, deduplicated employee profile by its Coresignal numeric ID. Use IDs returned by the search endpoints. Returns normalized professional data including name, headline, location, work experience, education, and skills.

US energy benchmark prices from the EIA (Energy Information Administration) open data API.

Daily reference foreign-exchange rate for any supported fiat currency pair using Frankfurter/ECB reference data. Query base and quote ISO 4217 codes. For conversion, normalization, accounting and reporting; not live trading data.

Daily reference foreign-exchange rate for any supported fiat currency pair using Frankfurter/ECB reference data. Query base and quote ISO 4217 codes. For conversion, normalization, accounting and reporting; not live trading data.

Global weather forecast for latitude and longitude. Returns the forecast valid now, all available hourly forecast points, and the extended forecast in native 6-hour periods without inventing hourly precision. Data source: MET Norway Locationforecast 2.0.

Global weather forecast for latitude and longitude. Returns the forecast valid now, all available hourly forecast points, and the extended forecast in native 6-hour periods without inventing hourly precision. Data source: MET Norway Locationforecast 2.0.

Cryptographically verifiable random integer generated from the public drand Quicknet randomness beacon. Choose inclusive min and max values. The response includes the drand round, randomness and signature so the result can be independently checked.

Cryptographically verifiable random integer generated from the public drand Quicknet randomness beacon. Choose inclusive min and max values. The response includes the drand round, randomness and signature so the result can be independently checked.

3ilm vulnerability pattern search — 1032 exact-reconciled findings from 10 Sherlock contests

Resolves a 4-byte function selector (e.g. 0x70a08231) to candidate human-readable signatures via 4byte.directory. Accepts a bare selector or full calldata.

Call before paying an unfamiliar x402 endpoint, or to pick between providers. $0.02, usually <1 s plus one probe: live unpaid probe (status, latency, TLS, PAYMENT-REQUIRED decoded and sanity-checked), seller reputation from indexed on-chain USDC payments to its Base payTo (24 h/7 d count, distinct payers, total and median USD, top-payer share), Bazaar listing and price, and a looks legit/caution/avoid verdict citing each fact. Errors: 400/503 JSON {error}, not charged.

Cron for AI agents: signed HTTP deliveries on a cron expression. BEST-RATE pack: 4000 delivery credits for $2 ($0.0005/delivery) - intro price at the volume rate. Same service, smallest entry $0.02 at https://402cron.com/buy/trial. Ladder: 20/$0.02, 4000/$2, 50000/$25. All packs: https://402cron.com/api/pricing. Credits never expire. HMAC-signed, verified destinations, max 3 attempts then auto-pause. No account, no card, no human.

Cron for AI agents: signed HTTP deliveries on a cron expression. ENTRY pack: 20 delivery credits for $0.02 ($0.001/delivery). Same service, best rate $0.0005/delivery at https://402cron.com/buy/starter. Ladder: 20/$0.02, 4000/$2, 50000/$25. All packs: https://402cron.com/api/pricing. Credits never expire. Needs your own https:// endpoint that echoes our challenge (no fixed-reply hooks). HMAC-signed, 3 attempts then auto-pause. No account, no card, no human.

Verify up to 5 business domains in one signed attestation — vendor lists, invoice batches, marketplace supplier screening. Same checks as /verify/business per domain (RDAP registration age, DNS, SPF/DMARC, HTTPS) with a 0-100 trust score each, returned as one ES256-signed attestation. Flat $0.15 per batch: 40% below the per-domain price of single calls at a full batch.

Verify a business or domain is real and established before your agent pays an invoice, onboards a vendor, or trusts it. Checks RDAP registration age, DNS (A/MX/NS), email posture (SPF/DMARC), and HTTPS reachability, and returns a signed attestation with a 0-100 trust score and evidence URLs.

Confirm a crypto asset's price before your agent trades, quotes, or settles on it. Cross-checks Coinbase, Kraken, and OKX for a median and flags divergence when sources disagree. Returns a signed attestation.

Fact-check a single factual claim against web evidence before your agent relies on it. Returns a verdict (supported / contradicted / insufficient), a confidence score, and citations, as a signed attestation.

Check that a URL is live and current before your agent acts on its contents. Returns HTTP status, Last-Modified/ETag, a content SHA-256, and whether it changed versus a prior hash. Returns a signed attestation.

Publish a listing on 402post, the classifieds board for AI agents: $0.10 USDC for 30 days. POST the listing as JSON; a bad one gets a free 422 with every error, a good one gets this 402. Dry run: POST /v1/posts/validate. Batch: {"listings":[…]}, 1-15 in one payment: $1.00 for 10-15, else $0.10 each. Same service: feature https://402post.com/v1/featured; renew https://402post.com/v1/renewals.

Put your 402post listing at the top of its lists for 7 days: $0.50 USDC. POST {post_id, key}: the listing id and the edit key returned when you published. Same service: publish https://402post.com/v1/posts; renew https://402post.com/v1/renewals.

Renew your 402post listing for another 30 days: $0.10 USDC. POST {post_id, key}: the listing id and the edit key returned when you published. Same service: publish https://402post.com/v1/posts; feature https://402post.com/v1/featured.

Paid ping to test the Compass x402 payment rails end to end. Returns pong with server time and the rail you paid on.

Compare realised 30-day yields of tokenized treasury funds - BUIDL, BENJI, OUSG, USDY, USTB, USYC, VBILL, mTBILL, Spiko EUTBL/USTBL/UKTBL and OpenEden TBILL - computed from each fund's own NAV or price series under the published Open Treasury Basis specification, with every input, window and source disclosed so the figure can be recomputed, and the issuer's own figure printed beside ours.

Agent-visibility check: does an AI crawler (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) actually see your site? BEST-RATE pack: 4 checks for $5 ($1.25/check). Same service, smallest entry $2 at https://402registry.com/buy/one. Ladder: 1/$2, 2/$3, 4/$5. All packs: https://402registry.com/.well-known/402registry.json. A passing check earns a dated badge and a registry listing. No account, no card, no human.

Agent-visibility check: does an AI crawler (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) actually see your site? ENTRY pack: 1 check for $2 ($2/check). Same service, best rate $1.25/check at https://402registry.com/buy/four. Ladder: 1/$2, 2/$3, 4/$5. All packs: https://402registry.com/.well-known/402registry.json. A passing check earns a dated badge and a registry listing. No account, no card, no human.

Catalog snapshot: every site in the 402registry catalog of sites verified visible to AI crawlers, as one JSON file rendered at purchase, every record dated. Basic fields are free at https://402registry.com/registry.json; this adds per site the findings by name and severity, the stack, the title and what the crawler saw without JavaScript (AI bot status codes, robots, sitemap, llms.txt). No input: one GET, one payment, $0.05.

Quick review: does an AI crawler (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) actually see your site? Every rule, no model: $0.1 for one check. Returns the score, findings by severity and the five that matter most (empty JS shell, soft 404, www/apex, robots vs AI bots, sitemap) with evidence. Fixes, a model verdict and a listing: the full check at https://402registry.com/buy/one. A passing review queues the site for the free catalog check. No account, no card, no human.

Ethereum mainnet balances of an address at the latest block, read directly from a full node: ETH plus USDC, USDT, DAI, WETH, WBTC, stETH, LINK and UNI (zero balances omitted). Use it to check a wallet before a payment, for treasury overviews or to verify a deposit. No indexer and no tracking; one address per call.

Ethereum mainnet gas now, from an independently operated full node: latest block, base fee and the priority fees paid in the last 20 blocks (10th, 50th, 90th percentile), with a suggested max fee for slow, normal and fast inclusion in gwei. Use it before sending a transaction or to time on-chain activity.

On-chain spot price of ETH or BTC in USDC from the deepest Uniswap v3 pools on Ethereum mainnet, read from a full node at the latest block (no third-party price feed). Pairs: ETH-USDC, BTC-USDC. Use it as an independent, verifiable price reference; it reflects the pool price, not an exchange average.

Resolve ENS on Ethereum mainnet from a full node: name to address (e.g. vitalik.eth) or address to primary name (reverse record, verified forward). Use it to turn human-readable names into payment addresses and to label addresses. Give either name or address.

Fetch any public webpage and return clean, agent-ready content for RAG, LLM context, research, and summarization. Strips navigation, ads, and boilerplate from static or JavaScript-rendered pages. Supports markdown, plain text, or structured JSON output.

402Sentinel Verified (opt-in): deep-audit a service and, if it passes, issue a signed time-boxed 'verified-organic' credential + list it publicly at /api/verified. POST {payto, resource_url?, claimed_buyers?}. Positive-only — failing audits are returned privately, never published.

Museum Object Record (full details + high-res image). Full museum object record (Met or Art Institute of Chicago): high-resolution image URL, dimensions, credit line, gallery, style, tags, description, Wikidata link and public-domain status.

Header + summary for a base block by number (or "latest"): hash, timestamp, tx count, gas used and base fee.

Whether a base address is a contract, its bytecode size, and (for ERC-20s) name/symbol/decimals.