Live · — across —

One balance.
Every tool your agent needs.

OpenTools connects your agent to every tool it needs. It discovers, compares, and runs them at runtime — metered, billed against a single balance, no per-provider keys.

Start with $1 free credit →Browse the catalog

$ set up https://opentools-three.vercel.app/SKILL.md

Works withClaude CodeCursorCodexClineAny MCP client

How it works

Your agent never touches a provider key. OpenTools sits in the middle and brokers every call.

Your agent

Claude, Cursor, Codex…

OpenTools

discover · inspect · run

Tools

one bill

opentools.discover()

Search the catalog in natural language. Ranked by fit and price.

opentools.inspect()

Read the exact input schema and pricing before you run.

opentools.run()

Execute and pay per call — debited from one balance.

agent session

> tell me my fortune

opentools.discover("fortune")
  fortune/api/fortune   $0.001 per call   ✓ verified

opentools.run("fortune", "/api/fortune")
  → { fortune: "A pleasant surprise is waiting for you." }
  billed $0.001 · balance $0.999

No subscriptions. No lock-in. Just open, metered tools.

Every endpoint publishes its price before you run it. You keep one balance, you see every charge, and you never buy a seat for a tool you use twice a month.

—

1

balance to manage

Prices are the provider's rate. OpenTools adds a 10% service fee, shown before every run.

Browse the catalog

See all tools →

Three ways to connect.

Same registry, same balance — whichever your agent speaks.

Skill

One line into your agent's chat.

Drop the OpenTools skill in and your agent learns to discover, inspect, and run tools on its own.

› set up https://opentools-three.vercel.app/SKILL.md

MCP

Add the remote MCP server.

Point any MCP client at the OpenTools server and get discover/inspect/run as native tools.

› https://opentools-three.vercel.app/mcp

CLI

Install and run from your terminal.

A single binary to search the catalog, inspect schemas, and execute endpoints.

› npm i -g @aeither/opentools

Add your API

List your API so agents can find and pay for it. Point us at the server — we read its discovery manifest, add every resource we find, and handle metering and billing. You keep your pricing.