Prediction Market Rule Check MCP
io.github.donniertf-hub/prediction-rules-mcpdonniertf-hubstreamable-httpv1.3.0Scanned
Risk-scores Polymarket/Kalshi settlement rules; Kalshi weather settlements. Not advice.
12 tools: 1 do something that can't be undone, 9 change things and 2 only read.
- Reads private data · 0
- Reads text others write · 0
- Can send data out · 1
- No findings
Tools listed without sign-in. Remote posture
Anlyon alternative
10 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
12 tools
Can't be undone 1Claude Code: ask
kalshi_weather_settlementsPAID $0.02/call (x402) or subscription / bundle pass.Can send data outNo findings
Why it is in this group
- The input addresses people (input.to): what it sends cannot be taken back.
What it can reach
- outboundThe input takes a destination (input.to): what the tool writes goes there.
Description, as the server wrote it 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 (Kalshi settlement timestamp, ISO UTC; null if Kalshi gives none) and close_to_settlement_seconds / close_to_settlement_minutes (gap from close to settlement, to spot late settlements or revisions), expiration_time, strike/bucket, yes/no result and settlement payout, plus the observed settlement value per day and the official settlement source. Optional date range. Information only, not betting advice. Historical settlements do not predict future results. 18+. BeGambleAware.org
Changes things 9Claude Code: ask
doubles_recordFREE.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it 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. Never shows unsettled picks. Information only, not betting advice. No guaranteed returns. 18+. BeGambleAware.org
doubles_todayPAID $0.05/call (x402 USDC on Base) or subscription / bundle pass.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it PAID $0.05/call (x402 USDC on Base) or subscription / bundle pass. Sports doubles feed (info only, 18+): today's stats-led doubles from Grok Double Bot with legs, kick-off/start times (UK), odds at tip time, combined odds, confidence and rationale. Information only, not betting advice. No guaranteed returns. 18+. BeGambleAware.org
kalshi_checkPRO.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it PRO. Risk-score a Kalshi market's rules by ticker (rules_primary + rules_secondary).
kalshi_weather_seriesFREE.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it 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+. BeGambleAware.org
live_marketsPAID $0.02/call (x402) or subscription.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it 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.
rule_checkFREE.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it 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.
rule_check_fullPRO.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it PRO. Full rule text + resolution source + all flags for up to 10 Polymarket markets matching a slug or search.
scan_riskyPRO.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it PRO. Scan the top live Polymarket markets by volume and list the ones with the riskiest settlement wording.
top_moversPAID $0.02/call (x402) or subscription.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it PAID $0.02/call (x402) or subscription. Live markets with the biggest 24h price moves on Polymarket and Kalshi, in one schema.
Only reads 2Show 2 read-only tools
market_lookupFREE.No findings
Why it is in this group
- The name "market_lookup" says "lookup": a word for reading.
Description, as the server wrote it 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.
search_marketsPAID $0.02/call (x402) or subscription.No findings
Why it is in this group
- The name "search_markets" says "search": a word for reading.
Description, as the server wrote it 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.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out1
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Remote posture
What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.
Looked at Oct 29, 2026, 22:28 UTC, unchanged since Oct 29, 2026. No credentials were sent and no tool was called. What is looked at.
- Reachable
- yes
- HTTP status of an anonymous initialize
- 200
- tools/list served without credentials
- yes
- Tools that change things, listed without credentials
- 10
- Protocol version
- 2025-06-18
- WWW-Authenticate on 401
- not observed
- resource_metadata in WWW-Authenticate
- not observed
- RFC 9728 protected resource metadata
- not observed
- Authorization servers
- not observed
- Legacy HTTP+SSE transport
- no
- Dynamic client registration
- not observed
- Client ID metadata documents
- not observed
- HighThe whole server
The endpoint served tools/list without credentials, and the list has 10 tools that change things (1 irreversible, 9 write). Whether a call also works without credentials was not tested: tools are never called.
What this check looks forMatched text
https://prediction-rules-mcp.donniertf.workers.dev/mcp: tools/list returned 12 tools to an anonymous client, including kalshi_weather_settlements (irreversible), rule_check (write), rule_check_full (write), kalshi_check (write), scan_risky (write) and 5 more
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.3.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http prediction-rules https://prediction-rules-mcp.donniertf.workers.dev/mcpclaude mcp add --transport http prediction-rules https://prediction-rules-mcp.donniertf.workers.dev/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__prediction-rules__market_lookup",
"mcp__prediction-rules__search_markets"
],
"ask": [
"mcp__prediction-rules__rule_check",
"mcp__prediction-rules__rule_check_full",
"mcp__prediction-rules__kalshi_check",
"mcp__prediction-rules__scan_risky",
"mcp__prediction-rules__live_markets",
"mcp__prediction-rules__top_movers",
"mcp__prediction-rules__doubles_record",
"mcp__prediction-rules__doubles_today",
"mcp__prediction-rules__kalshi_weather_series",
"mcp__prediction-rules__kalshi_weather_settlements"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as prediction-rules. Review it before you use it.
Capability tags behind 1 rule
- mcp__prediction-rules__kalshi_weather_settlements outbound
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/io.github.donniertf-hub/prediction-rules-mcp/verify?hash=be06b8332ec337a3b532ce774c578d5b859fc057cbb95a26b46e25a306866f0f" | jq -e '.changed == false'Pinned hash be06b8332ec3, from Oct 29, 2026, 21:19 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/io.github.donniertf-hub/prediction-rules-mcp/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/io.github.donniertf-hub/prediction-rules-mcp)Source: MCP Registry · repository. Synced Oct 29, 2026, 22:19 UTC.