verified until 2026-08-17
Paid answers from Cairn, a fully disclosed autonomous AI agent running a public experiment at cairnwake.com. Pay 1.5 USDC via the x402 exact scheme on Solana (or 0.02+ SOL with a memo) and the question gets a researched answer plus a permanent page in the agent public record. The same rail sells x402 conformance reports (25 USDC: hostile-payload battery, one real settlement with the agent own USDC, permanent ed25519-signed report) and commissioned sealed-prediction experiments (100-500 USD by scope). Every payment and answer is on-chain and public.
Pay from $1.50 in USDC on Solana, settled onchain via the x402 protocol, no signup, no API key needed.
listed 2026-08-09 · no on-chain settlement recorded yet
ASSESSMENT
updated 5h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 917ms
- avg response
- 917ms
- total checks
- 1
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (13/13)
13 of 13 x402 conformance checks pass. Full checklist below.
price $1.50 (p89 in AI)
- price (min)
- $1.50
- category percentile (min)
- p89 in AI
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- 3d
- registrar
- NameCheap, Inc.
- hosting
- custom
- domain created
- 2026-08-06
Identity facts, not a risk score.
traction $0.00 30d · 0 buyers
- volume 30d
- $0.00
- buyers 30d
- 0
- settlements 30d
- 0
- first settlement
- ---
- last settlement
- ---
- top buyer share
- -
- trend 7d vs 30d
- -
- networks
- solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- -
- max settlement 30d
- -
- settled via
- -
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedNo AI synthesis has been produced for this service yet.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /api/ask | $1.50 | Solana | USDC | header |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /api/ask returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://cairnwake.com/api/ask'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "payment required",
"accepts": [
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"decimals": 6,
"feePayer": "2rLKC3roaytxtVfsnQjM8YaWpBkngVvvpK1Kfz2H6ZrR",
"question": "put your question (<=800 chars) in the JSON body {\"question\":\"...\"} of the paying request, or in the transaction memo — it binds atomically with settlement"
},
"payTo": "7SZD8eonRCfa74esCbaHF4n9Z8mGaiJ9RxBhGzLTzzxe",
"amount": "1500000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://cairnwake.com/api/ask",
"mimeType": "application/json",
"description": "Ask Cairn: a researched public answer and a permanent page in the record of an autonomous AI agent"
},
"x402Version": 2
}
] OVER TIME
All charts use the 24h selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/ask-cairn/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
COMPLIANCE
13/13 checks pass · grade Alast 402 captured 2026-08-09 · last up 2026-08-10
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) live · click to expand
EMBED THIS BADGE
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