world-discovery-payai
Free catalog of all 20 paid x402 data products + LLM inference on agents.hotschmoe.com: crypto prices & world data (digest), uptime monitoring (sentinel), status pages (pingspot), agent-world state & notary ledger (world), content attestation (attest), x402 readiness audit (audit), dated liveness receipts (knock), continuous monitoring with signed push alerts (watch), bazaar listing health (bazaar), signed merchant-intel search of the x402 bazaar (bazaar-search), live x402 directory (live), batch liveness fleet audits (fleet), x402 market pulse (pulse), batch conformance audits (doctor-fleet), URL-to-markdown reader with signed records (read), web search for agents with optional top-result-as-markdown (search), signed change detection with unified diff (diff), cryptographic hashing & encoding (hash), cited synthesized answers with numbered sources (answer), concise summaries of any URL or text with key points (summarize), OpenAI-compatible LLM inference (chat/completions). FREE inference tier: /x402/infer-lite (5 completions/day per IP, max 128 tokens; paid twin 0.005 USDC). FREE embeddable x402 conformance badge for any merchant: /x402/doctor/badge/<host> (signed 0-100 score + report page, paste into any README). $0.0001-0.01 USDC per call (Base or Solana mainnet); no account, no API key; x402 v2 pay-per-call.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0 USDC on Base to 0xa869…89a56. The signed payment is good for 5 minutes.
- Paid to
- 0xa869…89a56
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 0 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"decimals": 6
},
"payTo": "0xa869DA4cFBacD940eC6e24390a99bE3Be4589a56",
"amount": "0",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"name": "agents.hotschmoe.com x402 service catalog",
"origin": "https://agents.hotschmoe.com",
"services": [
{
"name": "world-digest",
"path": "/digest",
"payai_url": "/x402/payai/digest",
"price_usd": "0.0001",
"description": "Live world data feed: crypto prices, FX, weather, HN top 10, GitHub trending"
},
{
"name": "world-sentinel",
"path": "/sentinel",
"payai_url": "/x402/payai/sentinel",
"price_usd": "0.0001",
"description": "Uptime monitoring: 3-state verdicts + 24h/48h uptime for the world's hosts"
},
{
"name": "world-pingspot",
"path": "/pingspot",
"payai_url": "/x402/payai/pingspot",
"price_usd": "0.0001",
"description": "Status page data API: per-site uptime JSON, sparklines, integrity hashes"
},
{
"name": "world-state",
"path": "/world",
"payai_url": "/x402/payai/world",
"price_usd": "0.0001",
"description": "Agent-world state: service health, tamper-evident notary ledger, board metadata"
},
{
"name": "world-attest",
"path": "/attest",
"payai_url": "/x402/payai/attest",
"price_usd": "0.01",
"description": "Content attestation for any public URL: signed, hash-chained, verifiable"
},
{
"name": "world-audit",
"path": "/audit",
"payai_url": "/x402/payai/audit",
"price_usd": "0.001",
"description": "x402 readiness audit: 0-100 payability + discoverability score with fixes"
},
{
"name": "world-knock",
"path": "/knock",
"payai_url": "/x402/payai/knock",
"price_usd": "0.001",
"description": "Dated liveness receipt for any public URL: signed, timestamped, 3-state verdict"
},
{
"name": "world-bazaar",
"path": "/bazaar",
"payai_url": "/x402/payai/bazaar",
"price_usd": "0.001",
"description": "Bazaar listing health report: catalog position, liveness history, ranked fixes"
},
{
"name": "world-bazaar-search",
"path": "/bazaar-search",
"payai_url": "/x402/payai/bazaar-search",
"price_usd": "0.001",
"description": "Search the x402 merchant economy: full-text search over the 28K-listing bazaar, every result with a signed intel receipt (health, 30d settlements, price, verified-at)"
},
{
"name": "world-live",
"path": "/live",
"payai_url": "/x402/payai/live",
"price_usd": "0.001",
"description": "Searchable index of x402 resources that actually work (live + signed receipts)"
},
{
"name": "world-fleet",
"path": "/fleet",
"payai_url": "/x402/payai/fleet",
"price_usd": "0.005",
"description": "Batch liveness audit: up to 25 URLs in one call, 5x cheaper than 25 knocks"
},
{
"name": "world-infer",
"path": "/v1/chat/completions",
"payai_url": "/x402/payai/chat/completions",
"price_usd": "0.005",
"description": "OpenAI-compatible chat completions (hotschmoe-dd, vLLM-served), pay-per-request"
},
{
"name": "world-diff",
"path": "/diff",
"payai_url": "/x402/payai/diff",
"price_usd": "0.001",
"description": "Signed change detection for any public URL: unchanged/changed/first-observation/target-error verdict + unified diff; the world keeps the baseline per URL"
},
{
"name": "world-hash",
"path": "/hash",
"payai_url": "/x402/payai/hash",
"price_usd": "0.0001",
"description": "Cryptographic hashing & encoding: sha256/sha512/sha1/md5, HMAC-SHA256, base64/hex/url encode+decode, JWT decode — deterministic, no key"
},
{
"name": "world-infer-lite",
"path": "/x402/infer-lite",
"payai_url": null,
"price_usd": "0",
"description": "FREE tier of the inference product: OpenAI-compatible chat completions, 5/day per IP, max 128 tokens (paid twin: /v1/chat/completions, 0.005 USDC, up to 2048 tokens)"
},
{
"name": "world-search",
"path": "/search",
"payai_url": "/x402/payai/search",
"price_usd": "0.002",
"description": "Web search for agents: top-10 results (title/url/snippet) + optional top-result-as-markdown, signed dated record"
},
{
"name": "world-answer",
"path": "/answer",
"payai_url": "/x402/payai/answer",
"price_usd": "0.005",
"description": "Cited synthesized answer to any question: search + page reads + LLM synthesis with numbered citations to exact source URLs, signed dated record"
},
{
"name": "world-summarize",
"path": "/summarize",
"payai_url": "/x402/payai/summarize",
"price_usd": "0.005",
"description": "Concise summary of any public URL or text: tight summary (up to 120 words) + up to 5 key points, signed dated record"
}
],
"generated": "2026-09-14T07:30:00Z"
}
},
"ownershipProofs": [
"0xfcad90f5cd549c2e1cddff67d4e62b78267f002307a165985cdddcdfd01d7c9b1e5c8a069f22f078db328fc2e3fd58cb2ef64143ae61edfacabbd009be6b250d1c"
]
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-15 13:18Z
- Last indexed by Roundhouse
- 2026-09-17 19:15Z
- Last enriched (probe, favicon, geo)
- 2026-09-14 18:46Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service world-discovery-payai and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=world-discovery-payai' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://agents.hotschmoe.com/x402/payai/discovery, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.