# compare_lines

Compare one market across all bookmakers for a match. Returns each book's quote line-by-line, the consensus line, the best price per outcome, each book's overround, and de-vigged fair odds from the sharpest (lowest-margin) book. Args: event_id: event id (e.g. "evt_…"). market_type: "1x2", "asian_handicap" (default) or "totals". period: "full_time" (default) or "half_time". format: display odds format (analytics are computed in decimal regardless). verbosity: "full" (default) or "terse". "terse" drops the per-book books array (the bulk of the payload) and returns only the worked answer (best_prices / consensus_line / fair_odds / summary).

Agent View of the PolicyLayer registry record for `compare_lines`. HTML page: https://policylayer.com/tools/dev-infersports-infersports/compare-lines

## Facts

- Tool: `compare_lines`
- Server: Infersports (`https://api.infersports.dev/mcp`) — https://policylayer.com/tools/dev-infersports-infersports.md
- Homepage: https://github.com/https://api.infersports.dev/mcp
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 5 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `format` | string | no |  |
| `period` | string | no |  |
| `event_id` | string | yes |  |
| `verbosity` | string | no |  |
| `market_type` | string | no |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "compare_lines",
    "arguments": {
      "event_id": "<event_id>"
    }
  }
}
```

## Why compare_lines is rated Low

This tool retrieves and displays existing odds data across multiple bookmakers without modifying, creating, executing operations, or deleting any data. It performs analytics on existing quotes (consensus calculation, overround computation, fair odds derivation) but these are read-only computational outputs, not side effects. No external systems are triggered, no financial transactions occur, and no data is mutated.

From the tool's own definition: "Tool description states it 'Compare one market across all bookmakers for a match' and 'Returns each book's quote line-by-line, the consensus line, the best price per outcome' — purely retrieval and comparison operations."

## Use case

AI agents call compare_lines to retrieve information from Infersports without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Infersports:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "compare_lines": {}
  }
}
```

## Other tools on Infersports (16)

- `compare_prob` — Read — https://policylayer.com/tools/dev-infersports-infersports/compare-prob.md
- `explain_handicap` — Read — https://policylayer.com/tools/dev-infersports-infersports/explain-handicap.md
- `find_arbitrage` — Read — https://policylayer.com/tools/dev-infersports-infersports/find-arbitrage.md
- `find_match` — Read — https://policylayer.com/tools/dev-infersports-infersports/find-match.md
- `find_value` — Read — https://policylayer.com/tools/dev-infersports-infersports/find-value.md
- `get_match_odds` — Read — https://policylayer.com/tools/dev-infersports-infersports/get-match-odds.md
- `get_opening_line` — Read — https://policylayer.com/tools/dev-infersports-infersports/get-opening-line.md
- `get_result` — Read — https://policylayer.com/tools/dev-infersports-infersports/get-result.md
- `get_sharp_line` — Read — https://policylayer.com/tools/dev-infersports-infersports/get-sharp-line.md
- `list_bookmakers` — Read — https://policylayer.com/tools/dev-infersports-infersports/list-bookmakers.md
- `list_events` — Read — https://policylayer.com/tools/dev-infersports-infersports/list-events.md
- `list_results` — Read — https://policylayer.com/tools/dev-infersports-infersports/list-results.md
- `list_today_matches` — Read — https://policylayer.com/tools/dev-infersports-infersports/list-today-matches.md
- `match_info` — Read — https://policylayer.com/tools/dev-infersports-infersports/match-info.md
- `scan_slate` — Read — https://policylayer.com/tools/dev-infersports-infersports/scan-slate.md
- `score_prob` — Read — https://policylayer.com/tools/dev-infersports-infersports/score-prob.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=dev-infersports-infersports · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-infersports-infersports