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One 0-100 safety score for a Base token before an agent buys: liquidity, top-10 holder concentration, owner powers in the bytecode, upgradeability (EIP-1967), explorer/Sourcify verification, creator history, small-trade price impact. Verdicts: safe/caution/danger per component, unknown when a check could not run, and not_a_token with no score when the address deploys no code.

Check an x402 endpoint before paying it. Give it any x402 URL: it makes the unpaid request, decodes the 402 challenge, reads the origin's .well-known/x402 and openapi.json, inspects the payTo address on-chain (USDC inflows, distinct senders, EOA vs contract vs smart-wallet delegation), and returns a 0-100 trust score with buy/watch/avoid plus the evidence and the penalties behind every point ...

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Ask the XH Agents knowledge base (15 field notes on infrastructure, x402 and agent tooling)

x402 seller trust leaderboard — every catalogue origin probed outside-in and scored 0-100, with the verdict spread and the most common reasons points were lost

Who an address transacts with inside a window: counterparties ranked by USD volume and transfer count, each with an on-chain verified class, first/last seen, and a flag only if the operator's curated label file marks it. An empty flag list means 'nothing curated', never 'clean'.

A dated, freshly rebuilt brief on where demand is in the agent-payment economy: what builders and agents are discussing and paying for in the last 30 days (Hacker News, GitHub, Polymarket, marketplace listings), plus our own paid-endpoint call and settlement performance. Rebuilt every day at 06:00 WIB; yesterday's copy is not the product.

YouTube Shorts automation with AI: queue → render → upload → notify. A 3x/day pipeline that takes product photos from Google Drive, renders a 720x1280 Shorts video with Ken Burns motion, uploads it to YouTube via the Data API v3, updates a static showcase page and reports to Telegram. Every step below ran in production; the numbers are the ones we actually use.

Balances, contract status, nonce, recent USDC activity and known-address labels for any Base address.

Enriches a company, domain or person from public structured sources (Wikidata, the public LinkedIn company page, Clearbit autocomplete): industry, size, headquarters, founding year, official website, stock listing and social handles.

Document to text (PDF, scans, images, DOCX, HTML) — per-page method, digest of the bytes read

Domain & email audit — SPF, DMARC, DKIM, MX, TLS certificate, HSTS and security headers, scored 0-100

Verifies that a transaction hash settled a USDC payment to a given recipient, and reports who funded it: the payer from the Transfer log vs the account that broadcast the transaction (they differ when an EIP-3009 facilitator relays it), plus block number, UTC block time, status, gas used, and unreadable=true when no RPC would answer instead of a false empty result.

Given a role (traders, builders, brokers, investigators) or a task in plain words, returns the ordered call plan across the XH Arkham-intel endpoints, mapped to the use cases Arkham published (inflow/outflow monitoring, portfolio monitoring, counterparty due diligence, know-your-users, competitor analysis, AML, ransomware, darknet). Says explicitly what we cannot answer.

Inflow/outflow for an ERC-20 token on Base over a window, measured where it is actually verifiable: each of the token's deepest pools has its own balance of that token read at two blocks, so the change, direction (into pool = sell side, out of pool = bought) and USD value are real numbers, plus the pool's price move from slot0 where the pool exposes it. Pools that cannot be read are listed with ..

Holdings of a Base wallet with USD values at request time (native + the ERC-20s you name), each token's verified class, and the totals. A snapshot, not a historical curve — that limit is stated in the response.

Licence one of the four XH Animations masters: 109 seconds of 21x-extended looping ambient footage, delivered as a time-limited signed URL with HTTP Range support so an agent can stream or fetch exactly the bytes it needs. Pick a video_id from the free menu at GET /api/video-license; the response carries bytes and sha256 so the download can be verified. Same price a human viewer pays on the site .

Hop-by-hop follow of USDC outflows from an address (up to 3 hops), with each destination's verified class, curated labels and any flagged venues on the path. Answers 'where did the money go' with evidence and an explicit boundary: it is not an attribution or sanctions product.

The broker view of a venue (a contract or wallet users pay into): every wallet that transacted with it in the window, the value segments of the book, VIP candidates by volume, which wallets went quiet (last transfer before the final third of the window), and which funding wallets carry a curated flag. Built for the 'user & VIP intelligence', 'transaction monitoring / KYC-KYB' and 'who is behind ..

The seven-step cycle-wallet hunt on Base. Give it a coin from a previous cycle and it does the work the method describes: reads that token's earliest transfers and lists its first buyers, keeps only the wallets that traded in the last N days, drops the machines (any wallet whose own transfers of the token are under a minute apart), reads what the survivors bought since and whether they still hold

Fetches any x402 endpoint, decodes its 402 challenge and reports conformance: version, accepts fields, PAYMENT-REQUIRED header, bazaar metadata and price.

Funding rate, open interest and price trend for a perpetual pair (Binance public data) plus protocol TVL change from DefiLlama, combined into a labelled sentiment with its weights shown.

Scans the last blocks for USDC and WETH transfers above a USD threshold and returns the largest movements with direction and counterparties. Pending-mempool visibility needs a node with txpool access, which this reports instead of faking.

Agent Cost Guard: send your own agent-config numbers (primary model, background/curator models, daily tokens, turn limit) and get a risk-ranked cost assessment back: which background work is silently running on an expensive model, what that costs in a daily range, and the specific levers that cap it. Deterministic rules, no storage, no telemetry.

Current Base base fee, suggested priority fees and USD cost estimates for a transfer or an ERC-20 transfer.

ERC-20 metadata, proxy detection and free DEX liquidity data for a token on Base, with the checks that could not be performed stated explicitly.

Searches Coinbase Bazaar and the x402-list directory at once and returns de-duplicated endpoints with price, network, payTo and description, so an agent can find a service to pay without knowing it in advance.

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