Which integrations are available for this server?

Generates CSS variables, Tailwind design tokens, and WCAG-compliant color palettes from natural language descriptions. Offers 16 ready-to-use DynamicStructuredTools for seamless integration into LangChain-based AI agent workflows. Supports building complex AI agents in LangGraph by providing specialized tools for document analysis and data transformation. Includes a markdown converter to transform HTML into clean Markdown, optimized for consumption by Large Language Models. Enables the use of tools within OpenAI GPT Actions through a dedicated OpenAPI specification for custom GPTs. Generates Python code snippets for regular expressions constructed from natural language descriptions. Available via the RapidAPI marketplace, allowing developers to access and bill tool usage on a per-call basis. Generates TypeScript interfaces and code snippets for regex patterns from plain English descriptions. Normalizes and parses US addresses into the standard USPS format with associated confidence scores. Automatically generates Zod validation schemas from natural language descriptions to facilitate data validation.

Agent Toolbelt

Focused API tools for AI agents and developers. 16 tools covering data transformation, text extraction, LLM utilities, document analysis, and contract review — each one a focused microservice, billed per call.

Production API: https://agent-toolbelt-production.up.railway.app

Quickstart

# Get a free API key
curl -X POST https://agent-toolbelt-production.up.railway.app/api/clients/register \
  -H "Content-Type: application/json" \
  -d '{"email": "you@example.com"}'

# Call a tool
curl -X POST https://agent-toolbelt-production.up.railway.app/api/tools/token-counter \
  -H "Authorization: Bearer atb_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text": "Hello world", "models": ["gpt-4o", "claude-3-5-sonnet"]}'

npm SDK + LangChain

npm install agent-toolbelt

Typed client

import { AgentToolbelt } from "agent-toolbelt";

const client = new AgentToolbelt({ apiKey: process.env.AGENT_TOOLBELT_KEY! });

// Count tokens across models with cost estimates
const tokens = await client.tokenCounter({
  text: myDocument,
  models: ["gpt-4o", "claude-3-5-sonnet"],
});

// Extract structured data from raw text
const contacts = await client.textExtractor({
  text: emailBody,
  extractors: ["emails", "phone_numbers", "addresses"],
});

// Convert HTML to clean Markdown for LLM consumption
const markdown = await client.markdownConverter({
  content: scrapedHtml,
  from: "html",
  to: "markdown",
});

LangChain integration

import { AgentToolbelt } from "agent-toolbelt";
import { createLangChainTools } from "agent-toolbelt/langchain";
import { createReactAgent } from "@langchain/langgraph/prebuilt";
import { ChatOpenAI } from "@langchain/openai";

const client = new AgentToolbelt({ apiKey: process.env.AGENT_TOOLBELT_KEY! });
const tools = createLangChainTools(client); // 16 ready-to-use DynamicStructuredTools

const agent = createReactAgent({
  llm: new ChatOpenAI({ model: "gpt-4o" }),
  tools,
});

Tools

Tool	What it does	Price
`text-extractor`	Extract emails, URLs, phones, dates, currencies, addresses, names from any text	$0.0005/call
`token-counter`	Count tokens across 15 LLM models (GPT-4o, Claude 3.5, etc.) with cost estimates	$0.0001/call
`schema-generator`	Generate JSON Schema, TypeScript interfaces, or Zod validators from plain English	$0.001/call
`csv-to-json`	Convert CSV to typed JSON — auto-detects delimiters, casts types, infers column types	$0.0005/call
`markdown-converter`	Convert HTML ↔ Markdown. Clean up web content for LLM consumption	$0.0005/call
`url-metadata`	Fetch a URL and extract title, description, OG tags, favicon, author, publish date	$0.001/call
`regex-builder`	Build and test regex patterns from natural language. Returns JS/Python/TS code snippets	$0.0005/call
`cron-builder`	Convert schedule descriptions to cron expressions with next-run preview	$0.0005/call
`address-normalizer`	Normalize US addresses to USPS format with component parsing and confidence score	$0.0005/call
`color-palette`	Generate color palettes from descriptions or hex seeds with WCAG scores and CSS vars	$0.0005/call
`brand-kit`	Full brand kit — color palette, typography pairings, CSS/Tailwind design tokens	$0.001/call
`image-metadata-stripper`	Strip EXIF/GPS/IPTC/XMP metadata from images for privacy	$0.001/call
`meeting-action-items`	Extract action items, decisions, and summary from meeting notes	$0.05/call
`prompt-optimizer`	Analyze and improve LLM prompts — scores + rewrite + change summary	$0.05/call
`document-comparator`	Semantic diff of two document versions with significance ratings	$0.05/call
`contract-clause-extractor`	Extract and risk-flag key clauses from contracts and legal docs	$0.10/call

Discover tools programmatically

Agents can auto-discover all tools at runtime:

curl https://agent-toolbelt-production.up.railway.app/api/tools/catalog

{
  "tools": [
    {
      "name": "text-extractor",
      "description": "Extract structured data...",
      "endpoint": "/api/tools/text-extractor",
      "metadata": { "pricing": "$0.0005 per call" }
    }
  ],
  "count": 16
}

Pricing

Tier	Price	Monthly calls	Rate limit
Free	$0/mo	1,000	10/min
Starter	$29/mo	50,000	60/min
Pro	$99/mo	500,000	300/min
Enterprise	Custom	5,000,000	1,000/min

Integrations

npm — npm install agent-toolbelt — typed client + LangChain tools
LangChain/LangGraph — createLangChainTools(client) — 16 DynamicStructuredTool instances
Claude MCP — npx -y agent-toolbelt-mcp — works with Claude Desktop and Claude Code
OpenAI GPT Actions — OpenAPI spec at /openapi/openapi-gpt-actions.json
RapidAPI — listed on the RapidAPI marketplace

Claude MCP

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "agent-toolbelt": {
      "command": "npx",
      "args": ["-y", "agent-toolbelt-mcp"],
      "env": {
        "AGENT_TOOLBELT_KEY": "atb_your_key_here"
      }
    }
  }
}

Claude Code — one command:

claude mcp add agent-toolbelt -e AGENT_TOOLBELT_KEY=atb_your_key_here -- npx -y agent-toolbelt-mcp

License

MIT

agent-toolbelt