x402 List

x402 Protocol Service Directory

Wintergreen x402 Content Broker

Finance

Live Hyperliquid quant data (funding rates, OHLCV, regime classification, correlation matrices), raw Polymarket odds, proprietary weather-forecast calibration and oil geopolitical event-study feeds, quant methodology packs, and x402 endpoint trust scoring. 57 endpoints, free trial tier on core quant data, USDC on Base.

Pay from $0.005 to $15.00 in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-08-17 · no on-chain settlement recorded yet

BASE URL https://x402.wintergreen.uk WEBSITE https://x402.wintergreen.uk ENDPOINTS 10 NETWORK Base ASSET USDC MEMBER SINCE 2026-08-17 MONITORED SINCE 2026-08-17

ASSESSMENT

updated 2h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 0%
uptime 24h
-
uptime 7d
-
uptime 30d
-
uptime 90d
-
response p95
-
avg response
-
total checks
1

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance unknown, stale (probe failing)

x402 compliance not evaluated yet.

jump to compliance checklist

price $0.005 to $15.00 (p30 in Finance)
price (min)
$0.005
price (max)
$15.00
category percentile (min)
p30 in Finance
category percentile (max)
p95 in Finance
endpoints / prices
10 / 5
model
tiered
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
37d
registrar
Cloudflare, Inc.
hosting
custom
domain created
2026-07-10

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
eip155:8453
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-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
GET /api/v1/methodology/bundle Complete 7-pack quant methodology bundle — backtesting, kill battery, risk, regime, execution, market analysis, agent orchestration. $15.00 (save $6). $15.00 Base USDC -
GET /api/v1/pm/market-odds Raw Polymarket market odds/orderbook snapshot by slug: current price, best bid/ask, volume, resolution date. Data only — no edge computation or trade recommendation. $0.01 Base USDC -
GET /api/v1/quant/correlation-matrix Rolling cross-asset correlation matrix across BTC/ETH/SOL (and optional extra symbols), computed from recent candles. $0.01 Base USDC -
GET /api/v1/quant/funding-snapshot Latest Hyperliquid funding-rate snapshot: BTC/ETH/SOL hourly funding, annualized %, mark price, OI, 24h volume. Fresh hourly from our collector. $0.005 Base USDC -
GET /api/v1/quant/ohlcv Historical OHLCV candles for a Hyperliquid perp. Query params: symbol (BTC/ETH/SOL/...), interval (1m/5m/15m/1h/4h/1d), limit (max 500). $0.01 Base USDC -
GET /api/v1/quant/oil-geo-premium Oil geopolitical event-study model: escalation/de-escalation classification with historical hit rates from a 27-event, multi-year dataset. Cites sample size explicitly — small-n segments are disclosed, not hidden. Research data, not a trade recommendation. $0.25 Base USDC -
GET /api/v1/quant/pulse Bundle: funding snapshot + regime + correlation matrix + latest OHLCV summary for BTC/ETH/SOL in one call. Discounted vs buying separately ($0.005+$0.01+$0.01+$0.01=$0.035 -> $0.03). $0.03 Base USDC -
GET /api/v1/quant/regime Live regime classification (trending/ranging/volatile) for a symbol, computed from recent candles. Classifier output — not a trade signal. $0.01 Base USDC -
GET /api/v1/quant/weather-calibration Per-station weather forecast error calibration: model bias, sigma, sample size, last-settled date. Built from Wintergreen's live collector + settlement history across 17 stations. Query param 'station' (e.g. KLGA, KLAX). Calibration data, not a trade recommendation. $0.25 Base USDC -
GET /api/v1/trust/check Single trust score lookup for an x402 endpoint. Query param 'url'. $0.01 Base USDC -
10 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/v1/methodology/bundle returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://x402.wintergreen.uk/api/v1/methodology/bundle'

No 402 response body has been captured for this service yet.

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/wintergreen-x402-content-broker/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.

UPTIME
08-17 · uptime 0.0%08-17 · uptime 0.0%08-1708-17
30d UPTIME 0%
RESPONSE TIME
no data
AVG RESP ---
PRICE (captured 402, USD)
building price history ($0.01)

Median across 10 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
building assessment history

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

VOLUME (on-chain settlement, USD)
no on-chain volume yet
DISTINCT BUYERS
no distinct buyers yet

COMPLIANCE

not evaluated · stale (probe failing)

last 402 captured --- · last up ---

  • 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 (8) live · click to expand
TIME STATUS RESP CAUSE
○ DOWN 35ms bad_status: unexpected HTTP 530
○ DOWN 114ms bad_status: unexpected HTTP 530
○ DOWN 144ms bad_status: unexpected HTTP 530
○ DOWN 121ms bad_status: unexpected HTTP 530
○ DOWN 162ms bad_status: unexpected HTTP 530
○ DOWN 155ms bad_status: unexpected HTTP 530
○ DOWN 217ms bad_status: unexpected HTTP 530
○ DOWN 104ms bad_status: unexpected HTTP 530

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RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

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