How do I install the Massive API skill?

Run npx skillmds@latest add modbender/massive-api in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Massive API skill do?

Access Massive(Polygon) stock, crypto, forex, options, indices, futures, market data, and news APIs via CLI. It is listed under Integrations & APIs on SkillMD.

Is Massive API safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Massive API?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Massive API free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Massive API?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Massive API by modbender — Agent Skill

Name: Massive API
Rating: 4.5 (4 reviews)
Author: modbender

File contents

Massive(Polygon) Market Data Skill

A CLI tool and JS client wrapper for the Massive(Polygon) financial data APIs. Covers stocks, crypto, forex, options, indices, futures, market status, news, and reference data.

CLI Usage

npx --yes massive <command> [options]

All commands output JSON to stdout. Use --help for a list of commands or <command> --help for command-specific options.

Stocks

See Stocks Commands Reference for full details on all stock commands and parameters.

Crypto

See Crypto Commands Reference for full details on all crypto commands and parameters.

Forex

See Forex Commands Reference for full details on all forex commands and parameters.

Options

See Options Commands Reference for full details on all options commands and parameters.

Indices

See Indices Commands Reference for full details on all indices commands and parameters.

Reference Data

See Reference Data Commands Reference for full details on all reference data commands and parameters.

Market

See Market Commands Reference for full details on all market commands and parameters.

News

See News Commands Reference for full details on all news commands and parameters.

Frequently asked questions

Massive API