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Install in OpenClaw
/install nyc-subway-status
Description
Check real-time NYC subway arrivals, track trains, and find stations. Use when user asks about subway times, train status, MTA arrivals, or NYC transit.
Usage Guidance
This skill appears to implement the advertised subway lookup features, but it relies on an unverified third-party host and explicitly tells the agent to fetch a remote 'llms.txt' (and offers an MCP endpoint). That remote file can change at any time and effectively instruct the agent at runtime — a supply-chain/risk vector. Before installing: (1) verify the operator and legitimacy of https://nyc-subway-status.com (prefer official MTA sources if you need guaranteed provenance); (2) fetch and inspect the llms.txt content yourself to see what it would instruct the agent to do; (3) if possible, restrict the skill so it runs only when explicitly invoked (disable autonomous invocation) and monitor outgoing network requests; (4) avoid passing sensitive personal data to the skill or enabling MCP connectivity to the third-party server. If you cannot validate the provider, treat the skill as untrusted.
Capability Analysis
Type: OpenClaw Skill
Name: nyc-subway-status
Version: 1.0.0
The skill is a standard integration for querying NYC subway real-time data via the nyc-subway-status.com API. It provides clear instructions for searching stations, checking arrivals, and tracking trips without any signs of data exfiltration, malicious execution, or harmful prompt injection. The use of an llms.txt file for documentation is a recognized pattern for providing context to AI agents.
Capability Assessment
Purpose & Capability
Name/description align with the documented API calls in SKILL.md — all network calls are to the same third-party host (nyc-subway-status.com). However, that domain is not an official MTA endpoint (e.g., api.mta.info), so it is a third-party data provider rather than the official service; this is plausible but should be verified by the user.
Instruction Scope
The SKILL.md instructs the agent to fetch a remote file (https://nyc-subway-status.com/llms.txt) 'once per session' and to follow the API reference it provides. Dynamically fetching and following an external plain-text instruction file gives the remote host effective runtime control over agent behavior (endpoints, schemas, tips). The doc also suggests connecting to an MCP server on the same host. The skill does not instruct reading local files or environment variables, but the remote-instruction pattern is a supply-chain/runtime-injection risk: the server could change instructions to exfiltrate data or call unexpected endpoints.
Install Mechanism
No install spec and no code files — the skill is instruction-only and does not write files or install binaries. That minimizes local installation risk.
Credentials
The skill declares no required environment variables, no credentials, and no config paths. There are no apparent requests for unrelated secrets or local config, which is proportionate for a read-only transit info skill.
Persistence & Privilege
always is false and there is no install-time persistence. However, model invocation is allowed (platform default). Combined with the remote llms.txt/MCP guidance, autonomous invocation increases risk because the agent could autonomously fetch remote instructions and act on them. Consider restricting autonomous execution if you are cautious.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install nyc-subway-status - After installation, invoke the skill by name or use
/nyc-subway-status - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
- Initial release: check real-time NYC subway arrivals, track trains, and find stations.
- Search for stations and routes with `/api/search?q={query}` before fetching arrivals or status.
- Get next train times, full station arrivals, line status, and track specific train trips.
- Group arrivals by route and direction; recommend the faster train where relevant.
- No API key required; workflow and endpoint details provided with a fetchable API reference.
- Supports Model Context Protocol for compatible agents.
Metadata
Frequently Asked Questions
What is NYC Subway Status?
Check real-time NYC subway arrivals, track trains, and find stations. Use when user asks about subway times, train status, MTA arrivals, or NYC transit. It is an AI Agent Skill for Claude Code / OpenClaw, with 293 downloads so far.
How do I install NYC Subway Status?
Run "/install nyc-subway-status" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is NYC Subway Status free?
Yes, NYC Subway Status is completely free (open-source). You can download, install and use it at no cost.
Which platforms does NYC Subway Status support?
NYC Subway Status is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created NYC Subway Status?
It is built and maintained by Max Shaw (@mxs2019); the current version is v1.0.0.
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