BUILT FOR THE AGENT ECONOMY

API tools that
agents pay to use

Plug-and-play microservices for AI agents. Schema generation, data extraction, validation, and more — discoverable via catalog, billed per call.

Start Free → View Catalog
bash
# 1. Register and get your API key
$ curl -X POST /api/clients/register \
    -d '{"email": "agent@example.com"}'

# 2. Discover available tools
$ curl /api/tools/catalog
# → {"tools": [{"name": "schema-generator", ...}, ...]}

# 3. Call a tool
$ curl -X POST /api/tools/schema-generator \
    -H "Authorization: Bearer atb_..." \
    -d '{"description": "a user profile", "format": "json_schema"}'

# → {"success": true, "durationMs": 3, "result": {...}}

Works where you work

One npm package. Direct HTTP calls, LangChain agents, MCP servers, GPT Actions — pick your integration.

npm install agent-toolbelt
Typed client for all tools. Works in Node.js, Bun, edge runtimes. Zero heavy dependencies.
import { AgentToolbelt } from 'agent-toolbelt'

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

const result = await client.tokenCounter({
  text: myDocument,
  models: ['gpt-4o', 'claude-3-5-sonnet']
})
LangChain / LangGraph
16 DynamicStructuredTool instances, ready to drop into any LangChain agent or LangGraph workflow.
import { createLangChainTools } from
  'agent-toolbelt/langchain'

const tools = createLangChainTools(client)

const agent = createReactAgent({
  llm: new ChatOpenAI({ model: 'gpt-4o' }),
  tools
})
Claude MCP + GPT Actions
Use all 16 tools directly in Claude Desktop, Claude Code, or any OpenAI-compatible GPT Actions integration.
# Claude Desktop (claude_desktop_config.json)
{ "mcpServers": {
  "agent-toolbelt": {
    "command": "npx",
    "args": ["-y", "agent-toolbelt-mcp"],
    "env": { "AGENT_TOOLBELT_KEY": "atb_..." }
  }
}}

# Claude Code — one command
$ claude mcp add agent-toolbelt \
  -e AGENT_TOOLBELT_KEY=atb_... \
  -- npx -y agent-toolbelt-mcp

Available Tools

Each tool is a focused microservice — validated input, structured output, usage-tracked.

Loading catalog...

How It Works

Three steps. Five minutes. Start earning per-call revenue from AI agents.

01

Discover

Agents hit /api/tools/catalog to see what tools are available, with descriptions, input schemas, and pricing.

02

Authenticate

Register for a free API key. Pass it as a Bearer token. Upgrade to a paid tier when you need more volume.

03

Call

POST to any tool endpoint with JSON input. Get validated, structured output in milliseconds. Usage is tracked and billed automatically.

Pricing

Start free. Scale when your agents need it.

Free
$0/mo
1,000 calls/month
  • All tools included
  • 10 requests/min
  • Community support
Get Started
Pro
$99/mo
500,000 calls/month
  • All tools included
  • 300 requests/min
  • Priority support
  • Usage analytics
Subscribe
Enterprise
Custom
5M+ calls/month
  • All tools included
  • 1,000+ requests/min
  • Dedicated support
  • Custom tools & SLA
Contact Us

Get your API key in 10 seconds

Register with your email. Start calling tools immediately.