Build an extractive source-linked microbrief from up to three rights-reviewed public sources. Exact short quotes and explicit unknowns only; no model or invented answer. Public/synthetic nonpersonal input only; 32 KiB input, 65 KB output. Result retention: 24 hours; minimal receipt metadata: 90 days. No model calls or factual certification.

Return bounded relationships declared in Crossref metadata. Linked resource types, availability and reproducibility are not verified; linked files are not fetched.

Return bounded publisher-deposited Crossref funder and award metadata. No independent grant verification or completeness claim.

Check up to 40 caller-declared claims and sources for unbound or unresolved citation IDs. Public/synthetic only. No passage inspection, entailment or truth verification.

Read exact-DOI Crossref update metadata with source hashes. Missing notices do not prove that a paper is unretracted.

Resolve up to five exact DOIs to public metadata. No fuzzy matching, abstracts, author lists or full-text delivery.

Read public ClinicalTrials.gov NCT status and last-update metadata. No clinical advice, participant/contact data or independent study validation.

Loads a public URL in a real headless browser with JavaScript executed, then returns the rendered HTML and page title, or a base64 screenshot. For pages a plain HTTP fetch can't read because the content is built client-side. Use it as a headless browser render API, JavaScript page renderer, dynamic page renderer, screenshot API, or to scrape JS-heavy sites and get the post-JavaScript DOM.

$0.001/call. Read or set PDF document metadata — title, author, keywords, dates. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny

Pay-per-use browser sessions with crypto. No API keys, no accounts -- just pay and connect via x402 or MPP.

Prediction market price history - one market's implied-probability series over 1d, 1w, 1m or max, with first/last/high/low/change, for a Polymarket market (condition id, slug or numeric id) or a Kalshi market (ticker). Ids come from /pm/search. Backtesting, charting, trend confirmation. ?id=<market id>&interval=1d|1w|1m|max.

Retrieve a stored x402 Doctor report again by its id ($0.01): the full report of a test purchase, price lookup or cached result, exactly as first delivered. Only the wallet that paid for the original call can retrieve it; reports are kept permanently.

Paid insider tips for ski and mountain travel, dated. Pass ?id=<tip-id> for one tip; the free status page lists what is available.

Claude API for AI agents, pay per token, no API key or account - POST an Anthropic Messages request (messages, system, tools, tool_choice, thinking) and get the full response back. Claude Opus 5, Sonnet 5, Haiku 4.5. Tool calling / function calling supported. Billed on actual usage at list price + 25%, capped at $0.25 per call (x402 upto scheme). LLM inference, chat completions, keyless Claude, Anthropic proxy. Free price sheet: /llm/models.

Best Arbitrum USDC venue for a given amount/risk, with optional deposit calldata

Every lift-ticket and season-pass price on file for one country in one answer (US: per state), the same rows /v1/ski/prices sells per resort, with source page and read date. Filters: region, ticketType, ageBand, dateFrom/dateTo. Up to 5000 rows; larger answers ask you to narrow, not charged.

Can I pay this address? ok · new · warn · sink. First 5 free. Then looks_20 $0.20 → X-Agent-Pass; look $0.10 optional. Packs: 20/$0.20 · 100-addr $0.15 · stamp $0.05. Agents pay themselves. No inbox. Base + Solana USDC.

Does a website use Mapbox? Fetches the page (homepage for a bare domain) and matches Mapbox's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (maps). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

Go module github.com/pkg/errors: latest version, description, license, repository and download/publish data from the go registry API. Pin, audit or compare github.com/pkg/errors in one call, no token. $0.01 per call.

Go module github.com/gin-gonic/gin: latest version, description, license, repository and download/publish data from the go registry API. Pin, audit or compare github.com/gin-gonic/gin in one call, no token. $0.01 per call.