Agent Toolbelt

Finance

AI-generated stock analysis (investment thesis, valuation, insider signal, earnings) from live fundamentals, as structured JSON.

About Agent Toolbelt

Agent Toolbelt is an API that provides AI-generated stock research by combining data from Polygon, Finnhub, and FMP and passing it through an LLM to produce structured analysis. Its tools include stock-thesis, earnings-analysis, insider-signal, and valuation-snapshot endpoints, which return JSON output such as verdicts, investment theses, insider trading reads, and items to watch for a given ticker. The service also includes a set of utility tools alongside the stock analysis tools.

It is built for integration into AI agent workflows rather than direct end-user consumption. Access is offered via an npm package with a typed client for Node.js, Bun, and edge runtimes, pre-built LangChain/LangGraph tool instances, a Claude Desktop/Claude Code MCP server, and GPT Actions compatibility.

Pricing includes a free tier (250 calls/month, 10 requests/min, all tools included, no credit card required), a Pro plan at $10/month (1,000 calls/month, 30 requests/min), a Starter plan at $29/month (4,000 calls/month, 60 requests/min, priority support), and a pay-as-you-go option at $0.02 per stock analysis call using prepaid credits ($5, $10, $25, or $50 packs) that do not expire, with utility tools priced separately at $0.001–$0.02 per call. Payments are processed through Stripe.

Key features

Aggregates data from Polygon, Finnhub, and FMP into decision-ready JSON
npm package with a typed client for Node.js, Bun, and edge runtimes
LangChain/LangGraph integration with 16 DynamicStructuredTool instances
Claude MCP server support for Claude Desktop and Claude Code, plus GPT Actions compatibility
Live ticker analysis demo requiring no signup

Frequently asked questions

Is there a free tier?

Yes, the Free plan includes 250 calls/month, all stock analysis and utility tools, and 10 requests/min with no credit card required.

What does it cost beyond the free tier?

Pro is $10/mo for 1,000 calls, Starter is $29/mo for 4,000 calls, and Pay As You Go costs $0.02 per stock analysis call using prepaid credits that never expire.

What platforms or frameworks does it integrate with?

It works via direct HTTP calls, an npm package, LangChain/LangGraph tools, Claude MCP servers (Claude Desktop and Claude Code), and GPT Actions.

What data sources power the analysis?

It pulls live financial data from Polygon, Finnhub, and FMP and synthesizes it with an LLM into structured JSON output.

Who is this API for?

It's built for developers creating AI agents that need decision-ready stock research, such as watchlists, screeners, and agent fleets.

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