Every agent-payable API.

Base mainnet network info in one call: chain ID, block height, and current gas price (wei and gwei).

NFT holdings for a wallet in one Base ERC721 collection, owned token IDs via ERC721Enumerable (tokenOfOwnerByIndex) - up to 20 tokens, requires the collection to implement Enumerable.

NFT metadata URI for an ERC721 token on Base mainnet via tokenURI - the on-chain pointer (IPFS, HTTP, or data URI), not a fetch of the document itself.

Who owns this NFT? ERC721 owner lookup on Base mainnet via ownerOf(tokenId).

Next transaction nonce for any Base mainnet wallet via eth_getTransactionCount - how many transactions it has sent.

The current pending Base mainnet block (mempool, not yet mined) - unconfirmed transactions via eth_getBlockByNumber('pending').

Is this Base contract an upgradeable proxy? Proxy contract detection for EIP-1967 (transparent/UUPS), beacon, or EIP-1822 patterns, returning the implementation address.

Slippage estimate, swap quote, and best DEX price on Base - compares Uniswap v2, Uniswap v3, and Aerodrome on-chain via Multicall3, returns amount received, chosen path, and price impact.

Transaction receipt via eth_getTransactionReceipt - status, gas used, and event logs for a mined Base mainnet transaction.

Which Base public RPCs serve a stale chain tip. Every 30s we ask all major public RPCs for eth_blockNumber in parallel and record how many blocks behind the fastest peer each was, plus latency and error rate. An RPC never reports its own lag, so an agent reading a balance from a lagging endpoint cannot tell. Omit ?rpc for the full map; ?rpc=<host> for one.

Simulate a Base mainnet transaction before sending it - will it succeed, estimated gas, and the decoded revert reason if it would fail.

Read a contract storage slot on Base mainnet via eth_getStorageAt - the raw 32-byte value, decoded as hex and unsigned integer, zero-filled if unset.

Total supply for an ERC20 (normalized by decimals()) or ERC721 (raw count, no decimals) contract on Base mainnet.

Base transaction lookup by hash - sender, recipient, value, calldata, gas and block, live from Base mainnet via eth_getTransactionByHash.

x402 settlement test

x402 settlement test

Base Morpho Blue stablecoin yields

Check an x402 niche before you build or buy. Send {"query":"pdf to markdown"}. Returns matching bazaar listings and hosts, how many have outside paying buyers in the last 30 days, max and median unique payers, price quartiles overall and among listings with demand, top listings and hosts by payers, and a verdict: empty, no-demand, thin-supply, contested, or incumbent-dominated. From Coinbase discovery metrics, refreshed every 6 hours.

Top-selling x402 bazaar services by unique paying buyers in the last 30 days. Send {"limit":25}, optionally with {"query":"weather"} or {"max_price_usd":0.01}. Per listing: resource URL, host, price, networks, 30-day calls and unique payers, last call time, and description, plus a host leaderboard. Skips listings whose only payment is their own indexing call. From Coinbase discovery metrics, refreshed every 6 hours.

blackhull agent-economy pack, 2026-10-30

blackhull token check: measured facts about one Base token, live from the chain

blackhull route: best-rated ai-analysis providers, 2026-10-30

blackhull findings report on one x402 service, 2026-10-30

blackhull flags for one x402 service, 2026-10-30

blackhull top-earning agent services, 2026-10-30

blackhull token check, 3 tokens: measured facts live from the chain. Measured by Blackhull from public data; every finding carries its evidence and can be disputed free at /dispute. Try it free: add ?sample=1.

Batch screen up to 50 blockchain addresses in one call for a flat $0.40 USDC (equal to $0.008 per address when you send 50). For fewer than 40 addresses, single /screen calls at $0.01 each cost less. Each result has the same action, sanctions (official OFAC SDN list only) and risk fields as /screen. Results are keyed by address; coOccurringAddresses is empty and reports are limited to 5 per address.

Retrieve one public C3 community fraud report by its report ID.

List top C3 contributor accounts ranked by reports, points, cases, and badges. All anonymous submissions share one account.

Validate one ISBN checksum and return its Open Library edition, work and author records projected into one sourced CSL-JSON book item; invalid or absent ISBNs return an explicit refusal. The FOUR truth reading is true when found and neither on refusal.

Market Chatter ($0.03/call): A Polymarket market's odds next to what X (Twitter) is saying about it, in one call: implied probability, 24h move, volume and days to resolution, beside the latest X posts about the question (retweets excluded) with post and author counts, the time window and the five most engaged posts. TypeSafe's Jev model reads the posts and gives the probability the chatter expects yes, and the divergence from the market's price. Pass a slug (or omit it for the busiest

X KOL Watchlist Monitor ($0.02/call): Watch up to 15 X (Twitter) accounts with one call: every new post from the list since your last poll, above your engagement floor, with retweets and crypto-spam (airdrop/giveaway/presale bait) filtered out and duplicates removed. Pass the returned newestId back as sinceId to get only what is new - replaces the search + filter + dedupe + paging loop KOL-monitoring agents build by hand. No X account or API key needed.

X Pulse ($0.05/call): Is X bullish or bearish on a ticker or topic right now? Reads the latest 40 X (Twitter) posts about it (retweets excluded) and has TypeSafe's Jev model score them into a calibrated probability that the chatter is bullish, plus a bullish/neutral/bearish stance with a probability for each, the time window and author count it covers, and the five most engaged posts to cite. One call, no X account or API key. Sentiment data, not investment advice.

X Trends ($0.005/call): Top 30 trending topics on X (Twitter) right now for a location by Yahoo WOEID: 1 worldwide, 23424977 United States, 23424975 United Kingdom, 23424856 Japan, 23424748 Australia, 2459115 New York, 44418 London. Each with rank and the search query to pull its posts. The location actually served is echoed back. No X account or API key needed.

Jev Decision ($0.005/call): Ask Jev (TypeSafe System One) typed questions about one state and get numbers back, not text: noul answers the probability a yes/no is yes; choice picks an option with a probability for every option; score places the state on an ordered scale of levels with a probability for every level. Same body and answer as TypeSafe's POST /v1/systemone (model optional, state as text or JSON, questions keyed by your ids), so their docs and SDK question helpers apply; pay

X Follower Sample ($0.01/call): Sample an X (Twitter) account's audience: its 40 newest followers with full profiles (bio, follower counts, account age, verification), how many of them are verified (checked against the account's verified-follower list, not X's dead legacy flag) and that share, plus the account's total follower count. No X account or API key needed.

X User Search ($0.01/call): Find X (Twitter) accounts by keyword: up to 20 matching accounts per call with full profiles (bio, follower counts, account age, verification) as clean JSON, plus a cursor for more. No X account or API key needed.

X Mentions ($0.01/call): Who is talking about an X (Twitter) account: the 20 latest posts that mention the handle, newest first, as clean JSON with metrics and entities, plus the accounts mentioning it most on the page and a cursor for older mentions. Optional sinceTime (unix seconds) to poll only what is new. No X account or API key needed.

X User Timeline ($0.01/call): Latest posts by an X (Twitter) account: up to 20 per call, newest first, as clean JSON with metrics, hashtags, links and mentions, plus a cursor for older posts. Replies excluded unless includeReplies=true. No X account or API key needed.

X Thread Unroll ($0.01/call): Unroll an X (Twitter) thread from any post id in it: the conversation author's posts oldest first with their text joined for reading, then the replies around it, each with metrics and its reply-to id. Pass the cursor for more replies. No X account or API key needed.

Bridge exploit track record: for one bridge, its hack history (incidents, total USD lost, funds returned, worst technique); with no bridge, a ranked leaderboard of every bridge hack by USD lost. Sourced from DefiLlama's hack dataset, joined and normalized by us.

Report on one bskts index basket of tokenized stocks and crypto on Robinhood Chain: live NAV, holdings and weights, fees, risk, and 7, 30 and 90-day return, drawdown and volatility.

US stock and ETF prices while the market is closed (nights, weekends, holidays): each tokenized stock's on-chain pool price on Robinhood Chain now against its price at the last US close, with trades and volume since, plus every bskts basket's move.

Bitcoin block metadata by height or hash (or the chain tip when neither is given), fused with the current difficulty-adjustment context, a computed halving countdown and a network hashrate snapshot. Informational, not advice.

Recommended Bitcoin transaction fee-rates in sat per vByte across five confirmation horizons (fastest, half hour, hour, economy, minimum) plus a live mempool congestion snapshot with an estimated block backlog. Informational, not advice.

Live Bitcoin mempool snapshot: unconfirmed transaction count, total virtual size and total fees, a fee-rate histogram broken into buckets, and an estimated block backlog. Informational, not advice.

Decoded Bitcoin transaction by txid: inputs and outputs, fee, size, weight and virtual size, replace-by-fee flag, and confirmation status with a confirmation count. Informational, not advice.

catalogue size and 30-day totals: services, calls, unique paying wallets, with the snapshot hash

Translate a short-drama episode, retaining subtitle cue identity and timing. A private series key carries approved terminology into later episodes and unambiguous renderings into the reverse direction. Output is a draft with mechanical checks and requires review before production approval.

Cheap raw normalized reserve breakdown of one centralized exchange: total on-chain reserves (currentTvl), clean-of-own-token reserves (cleanAssetsTvl), the own-token symbol / USD value / concentration, clean-asset ratio, spot & derivative volumes, leverage, 24h/1w/1m netflow and the public reserves URL, with citations. The cheap first grain before the fuller /cex/solvency verdict. Keyless DefiLlama source; reserves are a proxy, not proof of solvency.