The unified gateway
for AI-native API access
UnifyAPI was built with one conviction: AI agents should be able to reach any API in the world through a single URL, a single key, and a single payment rail — without integration work, without subscriptions, and without surprises.
The problem
Integration debt is the silent killer of AI products
Every time an AI agent needs a new capability — current weather, a stock quote, a flight price, a product lookup — someone has to integrate a new third-party API. That means reading docs, handling auth, wrangling rate limits, dealing with schema drift, parsing errors, and writing glue code. Then doing it again for the next provider. And the next.
The hidden cost isn't the integration itself. It's the ongoing maintenance: providers change endpoints, deprecate fields, rotate API keys. A team maintaining fifteen integrations is not building product — they're babysitting plumbing.
Most existing API marketplaces were designed for human developers building REST clients. They don't speak the language of AI agents. They have no concept of tool schemas, MCP, or machine-native payment flows. They assume a human in the loop who can fill out a form, read documentation, and pay a monthly invoice.
// Without UnifyAPI
import OpenWeather from 'openweather-api'
import CoinGecko from 'coingecko-api'
import Amadeus from 'amadeus'
import Finnhub from 'finnhub'
// ... 246 more providers
// With UnifyAPI
const result = await mcp.call('weather.forecast', {...})
// done ✓
Architecture
How UnifyAPI works
UnifyAPI sits between your AI agent and the world. Every request flows through a consistent pipeline — authenticated, billed, validated, and logged — before being proxied to the upstream provider.
Sign up with email or Google
Authentication is handled end-to-end by Privy — a crypto-native identity layer that supports email, social login, and embedded wallets. No passwords are stored on our servers. Your session is a signed JWT issued by Privy and verified on every request. Google OAuth and email magic links are both supported.
Create an API key
From the dashboard you can generate one or more API keys prefixed uak_live_. Keys are one-way hashed in the database — we store only a masked preview for display. Revoke any key at any time; revocation takes effect on the next request, with no propagation delay.
Top up your balance
Balances are denominated in USD and topped up with USDC on Base via the x402 protocol. x402 is an open standard for machine-native HTTP payments: the server issues an HTTP 402 response with payment requirements, an x402-capable wallet pays on-chain and retries, and the server verifies and settles without any human in the loop. During development you can use simulation mode, which credits instantly so you can test end-to-end flows before connecting a wallet.
Point your agent at the MCP endpoint
Add https://unifyapi.pro/api/mcp to your MCP client config with your Bearer token. The endpoint speaks JSON-RPC 2.0 over HTTP POST and implements the full MCP spec: initialize, tools/list, and tools/call. Your agent calls tools/list once and gets back all 818 tools with their typed input schemas. From that point it can call any tool as a native function — no additional configuration.
Every call is debited automatically
When a tool is called, the pipeline authenticates the key, checks the balance, validates the input against the tool's JSON Schema, proxies to the upstream provider, records the result, and deducts the cost — all in a single round trip. The response includes the cost, remaining balance, upstream latency, and the tool's output. There are no subscriptions, no minimum spend, and no monthly invoices.
Principles
Built on four pillars
Agent-first, not API-wrapper-first
Every design decision starts with the agent's perspective. Tool names are descriptive. Schemas are typed and minimal. Errors are structured. The MCP endpoint needs no documentation — an agent discovers everything it needs at runtime via tools/list.
Pay-as-you-go, not subscribe-to-maybe-use
The subscription model is a bad fit for AI agents that call tools sporadically at unpredictable volumes. UnifyAPI charges per call — from $0.001 to $0.035 depending on the upstream provider. Top up when you need to. Stop when you don't. No commitments, no idle spend.
Zero-trust security by default
API keys are one-way hashed at rest. Every request is authenticated before any upstream call is made. Input is validated against a strict JSON Schema before execution — invalid payloads are rejected immediately, never silently passed through. Keys can be revoked instantly from the dashboard.
Full observability, always
Every tool call is logged with its cost, latency, status, and upstream identifier. Your dashboard shows spend by tool, call counts, and recent activity in real time. You always know exactly what was called, when, and how much it cost — no opaque billing surprises.
The catalog
818 tools. 24 categories. One endpoint.
The UnifyAPI catalog spans the full breadth of what a general-purpose AI agent might need. Tools are grouped into 24 broad categories, each with multiple providers offering different trade-offs between price, freshness, and coverage.
Technology
Built with modern, production-grade tools
UnifyAPI is built entirely on open standards and production-grade infrastructure. Every component was chosen for reliability, type safety, and developer experience.
Payments
Why x402?
Traditional payment rails — credit cards, wire transfers, monthly invoices — were built for humans and billing cycles. They don't work for machines that want to pay $0.002 for a single API call at 3 AM with no human in the loop.
x402 is an open protocol built on the long-forgotten HTTP 402 Payment Required status code. When a client hits a paywall, the server returns 402 with a structured accepts field describing exactly what payment is needed — amount, currency, and network. An x402-capable client (or wallet) constructs the payment, submits it on-chain, and retries the request with an X-PAYMENT header. The server verifies the on-chain proof and responds. No intermediaries. No chargebacks. No fraud.
For UnifyAPI this means: an AI agent can autonomously top up its own balance, call tools, and manage spend — all without a human approving each transaction. This is the foundation of truly autonomous agents that operate in the world.
// 1. Agent calls tool
POST /api/payments/topup
// 2. Server responds (live mode)
HTTP 402 Payment Required
accepts: [{
scheme: "exact",
network: "base",
amount: "10000000",
asset: "USDC"
}]
// 3. Wallet pays on-chain, agent retries
POST /api/payments/topup
X-PAYMENT: <proof>
// 4. Server verifies and credits
HTTP 200 {credited: 10}
Protocol
MCP — the language of AI agents
The Model Context Protocol (MCP) is an open standard that gives AI models a structured way to discover and call external tools. Rather than hardcoding API integrations into every model, MCP lets a client (Claude, GPT, an open-source model, or a custom agent) ask a server: “what tools do you have, and how do I call them?” The server responds with typed schemas, and the client can call any tool as if it were a native function.
UnifyAPI's MCP endpoint at https://unifyapi.pro/api/mcp exposes all 818 tools in this format. Configure it once in your MCP client and your agent gains access to weather data, crypto prices, flight schedules, company lookups, gene databases, satellite imagery, and hundreds of other capabilities — all through the same interface, all billed the same way.
This matters because it dissolves the boundary between “what a model knows” and “what a model can do.” A model that can call weather.forecastdoesn't need weather data in its training set. A model that can call crypto.price is always up to date, regardless of its knowledge cutoff. MCP turns static models into dynamic agents.
Vision
An internet where every API is accessible to every agent
We believe the next generation of software will be written by agents, not humans. Those agents need reliable, affordable, discoverable access to real-world data and actions. UnifyAPI is our answer to that need — a single gateway that makes the entire API surface of the internet accessible through one endpoint, one key, and one payment that happens automatically.
We're starting with 818 tools. We're not stopping there. Every provider that joins the catalog makes every agent on the platform more capable. Every dollar spent goes directly to the tool that earned it. We're building the infrastructure layer for autonomous AI — and we're building it in the open.
Team
The people behind UnifyAPI
A small team obsessed with making the entire API surface of the internet accessible to autonomous agents.
Founder & Engineering
Protocol & x402
Catalog & Growth
Built With
Powered by the best stack
UnifyAPI is built and shipped entirely using cutting-edge tools — from AI-assisted development to decentralized payments and authentication.
Claude Code
Opus 4.8
Entire codebase written and shipped with Claude Code — Anthropic's most powerful AI coding agent.
Privy
Auth & Wallets
Seamless authentication via email, Google, and Twitter — with embedded wallets created automatically on login.
Base Network
L2 by Coinbase
All x402 micropayments settle on Base — Coinbase's Ethereum L2 with near-zero fees and instant finality.