Call Any API. Pay Per Use.

Browse thousands of APIs, call them with a single HTTP request, and pay only for what you use. No subscriptions. No sign-up. Just USDC per call.

Three Steps to Your First API Call

From zero to calling any API in under two minutes.

1

Install Handler

Pull our Docker handler and run it on your machine. One command, two minutes.

2

Browse the Catalog

Discover APIs from your handler's web panel. Filter by protocol, price, or category.

3

Call Any API

Your handler talks to the owner's handler. Payment settles on-chain automatically.

The Opsalis Protocol

Your app talks to your local handler. Everything else — encryption, payment, delivery — happens automatically.

Opsalis protocol flow: Consumer App to Consumer Handler to Owner Handler to Owner API, with USDC payments via Base L2 smart contract

Everything a Developer Needs

Standard interfaces, auto-generated SDKs, AI-ready tools, and transparent pricing.

OpenAPI 3.x Standard

Every API on the marketplace is exposed as a clean OpenAPI 3.x interface, regardless of the owner's backend protocol. Your app calls standard HTTP/REST — the handler does the rest.

Auto-Generated SDKs

Download ready-to-use SDKs in TypeScript, Python, Go, Rust, Kotlin, and more. Generated from the OpenAPI spec, bundled with each API. Zero dependencies — or use native HTTP.

MCP Server for AI Agents

Every API is automatically exposed as MCP tools. AI agents — Claude, GPT, local LLMs — can discover and call paid APIs directly. Same USDC payment, same encryption.

Transparent Pricing

You pay the API owner's price + ~$0.001 gas per call. A 5% IP royalty for the Opsalis software is included. No subscriptions, no tiers, no hidden fees.

One Interface, Any Backend

No matter what protocol the API owner uses, you always see clean OpenAPI.

REST GraphQL SOAP gRPC JSON-RPC XML-RPC

Also an API Owner?

The same handler lets you monetize your own APIs. Zero code changes to your existing backend.

Learn About Selling APIs →

Join the Beta

Be first in line when we launch. Free beta access, no credit card required.

No spam — just one email when we launch.