Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count — for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar.

Look up all x402 Bazaar resources listed under a merchant payTo wallet.

Check an ERC-20 spending allowance on Base; flags unlimited approvals.

Determine whether a Base address is a contract or an externally-owned account.

Live x402 endpoint probe: liveness, 30-day uptime, advertised vs actual fee match

Profile of a Telegram channel: title, description, subscribers, category, country, language, links and verified flag. Vet a channel or enrich a dataset in one call.

Composite Robinhood x402 brief: chain-wide catalog lag + per-address fingerprint in one call. Paid upgrade after ylk-robinhood-lag — replaces standalone hood-fingerprint on the Bazaar shelf.

Decompose an intent into subgoals and map catalog coverage vs gaps

Recommend one live verified x402 tool for an intent with rejection reasons

Extract structured entities from a Telegram channel's recent posts: links, @mentions, #hashtags, $cashtags, emails, phone numbers and bot commands. Pull contacts, tickers or outbound links at scale. Telegram formatting-level entities, not semantic NER.

A single Telegram post with its statistics over time: views, forwards and reactions. Measure how a specific post performed.

$0.001/page. Text-compare two PDFs into a unified diff — spot every change between versions. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny

Fetch recent messages from any public Telegram channel or group: monitor news sources, track updates, or feed downstream analysis. Optional `since` filters by date.

On-chain intelligence — whale transfers trending tokens DeFi TVL on Base and Ethereum

$0.003/page. Extract text from a scanned PDF (Tesseract) — make paper searchable data. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny

Word and brand tracker across public Telegram channels: follow keyword volume over time (by-period) or by channel (by-channels). Searches posts from the last 14 days.

US macro intelligence — Fed rate, CPI/Core PCE YoY, yield curve, M2 money supply, GDP, VIX, crypto Fear & Greed, AI macro regime narrative

Full supply chain report — shipping rates, BLS PPI, NY Fed GSCPI, AI summary

Latest US stock OHLCV quote from Stooq by ticker symbol.

Account info: join date, base location, verification, username changes. Example: GET /api/jack/about