Agent World

The x402 agent economy in one call: PayAI Bazaar market vitals (28K+ resources, 1886 hosts, settlement volume 24h/7d/30d, network mix, 24h uptime, avg latency), the venue's own top-20 merchants by settlements with volume, the world's accumulating trend history (30-min snapshots, deltas), and the world's position in the catalog. The only tool on this server about the MARKET rather than about your endpoint. Set lite:true for market vitals + top 5 merchants. [paid: 0.0050 USDC on Base mainnet via x402]

Search the world's LIVE INDEX: the only x402 directory that lists resources that actually WORK — every row has a fresh dated signed liveness receipt AND a Base-mainnet payment option (out of a 28K-listing catalog where ~84% measure dead). Substring search over name, description, origin. Returns up to 50 rows with price, networks, last-verified timestamp, and the verifiable receipt URL for each. [paid: 0.0010 USDC on Base mainnet via x402]

FREE catalog of everything this world sells: every paid x402 data product (digest, sentinel, pingspot, world-state, attest, audit, knock, bazaar, live-index, fleet, pulse) plus OpenAI-compatible LLM inference, each with its public URL, USDC price on Base mainnet, and a one-line description. Built live from the gateway's OpenAPI, so it never drifts. Use it to discover what is available before paying for a specific tool; the same catalog is the world's $0 PayAI Bazaar listing. [free]

Change detection for any public URL: the world fetches the target, hashes the raw body (SHA-256), and compares against a baseline — the world's own stored baseline for that URL (kept across your calls; a failed probe never destroys it) or your own baseline sha256 from an earlier world_knock/world_attest/world_diff. Returns a signed (Ed25519, kid world-diff) verdict — unchanged, changed, first-observation, or target-error — with a unified line diff of exactly what changed (text targets; binary bodies report byte counts). The pull-based monitoring product: no webhook, no 24h expiry, one recurring parameter. 0.001 USDC on Base mainnet via x402. [paid: 0.0010 USDC on Base mainnet via x402]

FREE preview of world_diff: the change-detection verdict (unchanged/changed/first-observation/target-error) plus both SHA-256 hashes for any public URL (5/hour per IP; read-only on the world's baseline store). Use it to check whether a page changed before the paid diff; the paid world_diff (0.001 USDC) returns the unified line diff of exactly what changed, with the Ed25519-signed dated record. [free]

Live 30-minute snapshot: BTC/ETH/SOL spot prices, USD/EUR/JPY FX, weather, Hacker News top 10, GitHub trending repos. One call, no parameters, JSON. For market context, price checks, news digests, dashboard data. [paid: 0.0001 USDC on Base mainnet via x402]

FREE x402 protocol-conformance report for any public endpoint: the world's doctor scores it 0-100 across 13 checks (402 challenge decodability, accept validation, discovery docs, advertised-vs-challenged price, CORS, resource.url) and EIP-191-signs the report with the world wallet (verify in two lines). The buyer-side safety check before wiring a client to an x402 merchant. Same engine as the public /x402/doctor route. [free]

Batch x402 conformance audit: up to 10 origins in ONE call — each gets a signed 0-100 conformance report (13 checks: challenge decodability, accept validation, discovery surfaces, advertised-vs-challenged price, CORS) plus a fleet summary (by-verdict counts, average, worst offender). 0.005 USDC on Base mainnet via x402. One call instead of ten; not subject to the free /doctor 5/hour limit. For vetting a batch of x402 merchants before wiring a client to any of them. [paid: 0.0050 USDC on Base mainnet via x402]

Batch liveness audit: up to 25 public URLs in ONE call. Per URL: dated 3-state verdict (up/degraded/down), final HTTP status, latency, SHA-256 body hash, x402-challenge detection (decodable? which networks? mainnet accepts?). Plus a fleet summary (up/degraded/down, dead ratio, x402-challenged, mainnet-payable). 25 world_knock calls cost 0.025; this costs 0.005. For directory re-knock sweeps, dead-listing cleanup, and vetting a batch of endpoints before paying any of them. [paid: 0.0050 USDC on Base mainnet via x402]

Dated liveness receipt for any public URL: Ed25519-signed, timestamped record of final HTTP status, latency, SHA-256 body hash, x402-challenge detection (decodable? which networks? mainnet accepts?), and a 3-state verdict (up/degraded/down). Published at a durable public URL and verifiable against the world-knock public key. Use to prove a URL answered (or not) at a given time. [paid: 0.0010 USDC on Base mainnet via x402]

Fetch any URL as clean markdown for LLM/agent context (web page to markdown for your LLM): reads any public URL and returns markdown (headings, links, lists, tables, code; scripts/styles stripped) trimmed to max chars (default 8000, cap 50000), plus title, meta description, canonical, JSON-LD types, link stats, SHA-256 of the raw body, and an Ed25519-signed dated record (kid world-read) of exactly what the world saw. JSON and plain-text targets return as-is with stats. The action tool: it does work for you instead of reporting on endpoints. 0.001 USDC on Base mainnet via x402. Also listed in the agent402 Smart Order Router's open index: to buy through the router instead, POST https://agent402.tools/api/route/execute with {"task": "fetch <url> as markdown", "include": "external"} plus a $0.01 USDC x402 payment on Solana — the router resolves the task against the open index and pays the winning seller from its own wallet (we receive $0.001; the extra $0.009 is the router's fee). [paid: 0.0010 USDC on Base mainnet via x402]

FREE preview of world_read: the first 500 chars of the clean-markdown render of any public URL, with title and content type (5/hour per IP). Use it to check whether a page is worth the paid read; the paid world_read (0.001 USDC) returns up to 50000 chars with JSON-LD, link stats, and the Ed25519-signed dated record. [free]

Web search for agents: any query returns the top 10 web results (rank, title, URL, snippet) from DuckDuckGo (Bing fallback) — no API key, no account — optionally with the top result already fetched as clean markdown for LLM context (fetch:true, max chars default 8000), plus an Ed25519-signed dated record (kid world-search) of exactly what the world saw. The search half of the search-then-read loop: find sources with world_search, digest them with world_read. 0.002 USDC on Base mainnet via x402. Also listed in the agent402 Smart Order Router's open index: to buy through the router instead, POST https://agent402.tools/api/route/execute with {"task": "<your query>", "include": "external"} plus a $0.01 USDC x402 payment on Solana — the router resolves the task against the open index and pays the winning seller from its own wallet (we receive $0.002; the extra $0.009 is the router's fee). [paid: 0.0020 USDC on Base mainnet via x402]

FREE preview of world_search: the top 3 web results (title, URL, snippet) for any query (5/hour per IP). Use it to check what a query returns before the paid search; the paid world_search (0.002 USDC) returns up to 25 results, optional top-result-as-markdown, and the Ed25519-signed dated record. [free]

Uptime status of 12 monitored HTTPS hosts: 3-state health (up/degraded/down) per host, recent incidents, last-change times. For dependency checks and status-page data. [paid: 0.0001 USDC on Base mainnet via x402]

FREE health check of the agent world that serves this MCP endpoint: digest feed freshness, sentinel 3-state host health summary, live citizen count, and the world's payment wallet. Free at any time — use it to confirm the world is alive before paying for data. [free]

FREE status of the world's watch product: latest state of any ACTIVE continuous-monitoring watch on the given URL (verdict up/degraded/down, last check, checks count, expiry) — the world knocks registered targets every ~30 min and pushes Ed25519-signed alerts to buyer webhooks on state change. Registration is paid: GET /x402/watch?url=<url>[&callback=<webhook>] (0.002 USDC on Base mainnet, up to 24h). If no watch is active on the URL you get a registration pointer. [free]