MCP.Market

NegativeEV bet checker MCP server

online · 100% uptime
by negativeev.com·com.negativeev/bet-checker·v1.4.5
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Grade any MLB, WNBA, PGA or ATP bet against thousands of play-by-play sims. No key, no signup.

A87/100grade A
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Safety scan
A87/100

full report

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If you have run it, two minutes of your experience saves the next person an afternoon.

NegativeEV bet checker tools (3)

write = sends, deletes, buys or posts
  • check_betFree

    Check a specific sports bet against thousands of play-by-play game simulations: each leg's simulated probability, the sportsbook's implied probability, and the edge. Send the bet as plain text - teams or players, market, line, odds. A parlay in one string is graded leg by leg and priced as a whole. Call this first; nothing has to be set up, and a missing slate, an unrecognized bet, or an unsupported market comes back as a plain `status` without spending a check. It prices a bet the caller names and never suggests one, so there is nothing to send for "what should I bet tonight". Every result leads with `status` and `check_spent` and says whether re-wording would change anything; when it says no, it means no. Covers MLB, WNBA, PGA, and ATP. A game that already started still checks, against the simulations from before it began.

  • get_slateFree

    Which of MLB, WNBA, PGA, and ATP have a checkable slate right now - at least one simulated game that has not started. Pass `sport` for one; omit it for all. Free, spends no check. It is not required before `check_bet`, which reports a missing slate itself at no cost. Call it to answer "what can be checked today", or after a `no_slate` or `ungraded` result, which mean the game is not on the simulated slate rather than that the bet was worded wrong.

  • get_usageFree

    How many bet checks the caller has left and when the next one frees up - 100 a day shared per device anonymously, 1000 an hour with a signed-in user's token. Free, spends no check. It grades nothing, so it is not a step before a check: call it when a check comes back refused for quota, or before working through a long list of bets.

Public scan report

scanner v0.1.10 · 2026-10-30 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1624ms20/20
  • Tool poisoning3 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 60 days ago12/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How NegativeEV bet checker compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
87/100
higher than 73% of 48,243 servers
Tools
3
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
397 ms
faster than 41% of 30,027 servers

What its tools let an agent do: 3 read

Install NegativeEV bet checker in Claude Code, Cursor or VS Code

claude mcp add --transport http bet-checker https://negativeev.com/mcp
Add to Cursor

What the publisher says

From the NegativeEV bet checker repository's README, as published. We do not edit it. Read it on GitHub

NegativeEV MCP server

Grade any MLB, WNBA, PGA or ATP bet against thousands of play-by-play game simulations, from inside your AI client.

Whether a bet is worth taking depends on tonight's lineups, today's injuries, and the weather at first pitch. None of that is in a model's weights. Asked cold, a model answers fluently and wrongly. This server returns a probability counted from simulations of the actual game: each leg's simulated win probability, the probability the sportsbook's price implies, and the edge between them.

This is a hosted remote server. There is nothing to build or run from this repo. The repo is the server's public face and carries a mirror of its registry record (server.json).

Connect

No API key, no signup. Anonymous calls work immediately. The server speaks plain Streamable HTTP, so any MCP client can connect to https://negativeev.com/mcp.

Claude Code

claude mcp add --transport http negativeev https://negativeev.com/mcp

Claude Desktop and claude.ai

Settings → Connectors → Add custom connector, then paste https://negativeev.com/mcp as the URL.

Cursor

Add {"negativeev": {"url": "https://negativeev.com/mcp"}} under mcpServers in ~/.cursor/mcp.json. Also listed on cursor.directory.

VS Code (Copilot)

code --add-mcp '{"name":"negativeev","type":"http","url":"https://negativeev.com/mcp"}'

ChatGPT

Settings → Security and login → enable Developer mode, then add https://negativeev.com/mcp as a connector at chatgpt.com/plugins. Developer mode is required for custom MCP connectors and is available on Pro, Plus, Business, Enterprise and Education accounts on the web.

There is also a Claude Code plugin that wraps this server: jessejohnsohn/negativeev-bet-checker. Install with claude plugin install negativeev-bet-checker.

Opening https://negativeev.com/mcp in a browser shows the same install steps.

Tools

Call getslate first to confirm there is a checkable slate. checkbet spends one of the caller's checks only when the bet fully grades, and every result says so outright in its status and checkspent fields. A bet that comes back ungraded was understood. It is simply not on the simulated slate, so re-sending it with different wording returns the same answer. Check getslate instead.

Limits and auth

Anonymous calls share a per-device quota of 100 checks a day, on its own counter. Signing in makes checks unlimited, with a pace cap of 1000 checks an hour. Send a signed-in user's access token as Authorization: Bearer. Details at negativeev.com/auth.md. An invalid or expired token is rejected with a 401 rather than silently downgraded, so re-authenticate rather than retrying anonymously.

Details

NegativeEV checks bets. It takes no bets and sells no picks.

Nothing above is checked by us. What we check is on the safety report.

NegativeEV bet checker: common questions

Is NegativeEV bet checker MCP server safe?
Yes, by our scan: it is graded A (87/100). Read the NegativeEV bet checker safety report
How do I install NegativeEV bet checker?
It runs remotely at negativeev.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does NegativeEV bet checker need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is NegativeEV bet checker maintained?
The last commit was 67 days ago (2026-08-30). The latest release is v1.4.5.
Is NegativeEV bet checker up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does NegativeEV bet checker compare with other MCP servers?
safety score 87/100 (higher than 73% of 48,243 servers); tools 3 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.