Prediction Market Rule Check - rule_check

https://prediction-rules-mcp.donniertf.workers.dev/x402/rule_check

● healthy data

Don't lose a winning trade to the small print — risk-score Polymarket and Kalshi settlement rules before you bet.

Paid verification

No sponsored paid call yet.

Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.

Quality grade

How grading works

B 58.6 / 100

Availability 20.0 / 20

Endpoint responded (HTTP 402)

Payability 15.0 / 15

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 0.0 / 35

0 distinct payers, 0 USDC transfers in the last 30 days; the wallet is shared by 47 listings, so each is credited 1/47

Performance 10.0 / 10

Last probe answered in 180 ms (full marks at 200 ms or less)

Readiness 13.6 / 15

Agent readiness 91/100

Owner verified 0.0 / 5

Nobody has claimed this listing yet

Endpoint last checked 18 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

A · 91/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 58.6/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements	10/10	Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge	25/25	Paid endpoint answers with an HTTP 402 challenge (180 ms).
x402 version	n/a	x402 version not observed yet.
Signed descriptor	n/a	No x402 standard defines a signed descriptor.
Uptime (30 days)	15/15	29/29 probes succeeded over 30 days (100%).
Resource declaration	10/10	Declares 12 paid resource(s).
Verified identity	5/10	Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags	3/5	seen within 30 days; declares x402.
Security declaration	n/a	Payment is the access control for an x402 resource.

Applicable criteria total 75 points, scaled to 100.

Responsiveness: Responsive (180 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest. Qualifies the payment claim; adds no points.

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 90% of peers; This listing 91 · peer median 78
Latency: Faster than 57% of peers; This listing 180 ms · peer median 205 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags −2 — Keep the listing current in the registry or source it comes from.
Now: seen within 30 days; declares x402.

How many agent tools actually work · All statistics

Paid endpoints

12 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/rule_check $0.0300 / call

FREE. Risk-score the settlement rules of a Polymarket market (slug or search words): flags discretion, vague sources, cancellation and deadline traps. Top 2 markets.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/rule_check_full $0.0300 / call

PRO. Full rule text + resolution source + all flags for up to 10 Polymarket markets matching a slug or search.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/kalshi_check $0.0300 / call

PRO. Risk-score a Kalshi market's rules by ticker (rules_primary + rules_secondary).

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/scan_risky $0.0300 / call

PRO. Scan the top live Polymarket markets by volume and list the ones with the riskiest settlement wording.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/market_lookup $0.0300 / call

FREE. Live price, volume and close time for ONE prediction market in the normalised Polymarket+Kalshi schema. Give a Polymarket slug or a Kalshi ticker.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/live_markets $0.0200 / call

PAID $0.02/call (x402) or subscription. Live open markets from Polymarket and Kalshi in one schema, ranked by 24h volume within each venue (interleaved). Filter by venue or text.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/search_markets $0.0200 / call

PAID $0.02/call (x402) or subscription. Keyword search across live Polymarket and Kalshi markets (e.g. 'fed rate', 'bitcoin', 'election'); normalised prices and volumes.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/top_movers $0.0200 / call

PAID $0.02/call (x402) or subscription. Live markets with the biggest 24h price moves on Polymarket and Kalshi, in one schema.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/doubles_record $0.0300 / call

FREE. Sports doubles feed (info only, 18+): the full SETTLED record of Grok Double Bot's daily doubles, every pick including losses, with legs, odds at tip time and result; won/lost/void counts, win rate, average combined odds and running profit on a flat £10 stake, plus pre-kickoff SHA-256 fingerpr

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/doubles_today $1.0000 / call

PAID $1.00/call (x402 USDC on Base; one call returns the whole day's picks, so $1 a day) or the $15/month doubles plan. Not included in the £12/month plan, bundle passes or trial keys. Sports doubles feed (info only, 18+): today's stats-led doubles from Grok Double Bot with legs, kick-off/start time

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/kalshi_weather_series $0.0300 / call

FREE. List Kalshi weather series (daily high/low temperature, rain, snow) by city or keyword, with series ticker, frequency and official settlement source. Use the ticker with kalshi_weather_settlements. Information only, not betting advice. Historical settlements do not predict future results. 18+.

POST https://prediction-rules-mcp.donniertf.workers.dev/x402/kalshi_weather_settlements $0.0200 / call

PAID $0.02/call (x402) or subscription / bundle pass. Settled Kalshi weather markets for a series (e.g. KXHIGHNY) or city: per market the ticker, close date, exact close_time (ISO 8601 UTC, Z) and close_time_local (ISO with the city's UTC offset; local_tz IANA zone, null if unknown), settlement_time

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X POST https://prediction-rules-mcp.donniertf.workers.dev/x402/rule_check  # expect HTTP 402 Payment Required (about 0.02 USDC/call)

/.well-known/x402.json

https://prediction-rules-mcp.donniertf.workers.dev/.well-known/x402

Listed in

Directories this entry was found in.

submission since 2026-10-14