# bts.transport.tsi

Retrieve the BTS Transportation Services Index (TSI), a monthly economic indicator measuring the volume of freight and passenger transportation services across all modes. Returns total TSI, freight TSI, passenger TSI, plus component indices (vehicle miles traveled, rail carloads, transit, petroleum/gas pipelines). Base year 2000=100. Data from 2000 to present. Source: BTS TSI dataset (Socrata bw6n-ddqk). No auth — US Gov public domain.

Agent View of the PolicyLayer registry record for `bts.transport.tsi`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/bts.transport.tsi

## Facts

- Tool: `bts.transport.tsi`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 3
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `limit` | integer | no | Maximum number of monthly records to return (1–300, default 12). |
| `end_date` | string | no | End of date range in YYYY-MM-DD format (e.g. "2024-12-31"). |
| `start_date` | string | no | Start of date range in YYYY-MM-DD format (e.g. "2024-01-01"). Index goes back to 2000. |

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": "bts.transport.tsi",
    "arguments": {}
  }
}
```

## Why bts.transport.tsi is rated Low

Tool retrieves historical transportation data with no side effects or modification capability.

From the tool's own definition: "Retrieve the BTS Transportation Services Index (TSI), a monthly economic indicator"

## Use case

AI agents call bts.transport.tsi to retrieve information from Apibase 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 Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "bts.transport.tsi": {}
  }
}
```

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## 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`

---

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