API infrastructure
for AI Agents
The protocol-agnostic API marketplace. Discover, connect, and call any API in 5 minutes — not days. MCP, REST, and whatever comes next.
Trusted by AI agents and developers
Try it live
No signup required. Pick an API, hit Run.
/api/v1/apis?q=REST Countries&limit=1One Token. Any API.
No per-provider credentials. No individual SDK installations. Just one apitree token.
import { ApitreeClient } from '@apitree/sdk';
const apitree = new ApitreeClient('nxs_live_xxx');
// Call any API through apitree
const weather = await apitree.call('open-meteo-weather');
const rates = await apitree.call('exchange-rates');
// Batch: call multiple APIs at once
const results = await apitree.batch([
{ api: 'exchange-rates' },
{ api: 'restcountries', path: 'all' },
{ api: 'cat-facts' },
]);
// Check your usage
const usage = await apitree.getUsage();AI Agent Ready
14 MCP tools + 2 prompts for search, call, batch, compare, health scoring, cost optimization, and fine-tuning. AI Agents discover and invoke APIs automatically.
Built-in Resilience
Circuit breakers, retry with exponential backoff, 15s timeout, and response caching. Your calls always land.
Unified Billing
One credit balance for all APIs. Real-time usage tracking, CSV/JSONL export, cost forecasting.
Self-Healing Gateway
Auto-detects schema changes, maps renamed fields, and health-checks every 15 minutes.
One token, one SDK, every API. AI Agents discover and call APIs automatically through MCP — or use our REST gateway directly.
// Claude Code / Cursor — just ask naturally
// "Find an API for bank account balance"
// apitree MCP Server auto-handles:
search_apis({
intent: "bank account balance query",
category: "financial"
})
// Returns: matched API with 0.94 similarity
// → call_api() with your apitree token
// → Done. 5 minutes, zero docs.AI-first developer experience
apitree is the API infrastructure layer that AI Agents call by default. One token unlocks every API in the marketplace — your agent handles the rest.
The future is built for Agents.
The entire API ecosystem — discovery, integration, operations — was designed around human developers. apitree reimagines it all for a world where AI Agents are the primary consumers.
Everything AI Agents need to call APIs at scale
Built from the ground up for the MCP era — where AI Agents are the primary API consumers.
Trusted by builders
“We replaced 12 API integrations with one apitree token. Our Claude Code agent now calls financial, weather, and translation APIs without any manual setup.”
“The batch API endpoint is a game changer. Our agent fetches exchange rates, weather, and news in a single request — 3x faster than sequential calls.”
“apitree's circuit breaker saved us at 3AM. A provider went down, but our agent automatically got cached responses while the circuit was open.”
“We listed our data API on apitree Marketplace. AI agents started calling it within hours — zero marketing, zero integration docs needed.”
“The MCP Server + TypeScript SDK combo is perfect. Our Cursor-based dev workflow discovers and calls 1,300+ APIs without leaving the IDE.”
“Credit forecast told us we'd run out in 3 days. Upgraded plan, zero downtime. The notification system is exactly what AI-first companies need.”
“We replaced 12 API integrations with one apitree token. Our Claude Code agent now calls financial, weather, and translation APIs without any manual setup.”
“The batch API endpoint is a game changer. Our agent fetches exchange rates, weather, and news in a single request — 3x faster than sequential calls.”
“apitree's circuit breaker saved us at 3AM. A provider went down, but our agent automatically got cached responses while the circuit was open.”
“We listed our data API on apitree Marketplace. AI agents started calling it within hours — zero marketing, zero integration docs needed.”
“The MCP Server + TypeScript SDK combo is perfect. Our Cursor-based dev workflow discovers and calls 1,300+ APIs without leaving the IDE.”
“Credit forecast told us we'd run out in 3 days. Upgraded plan, zero downtime. The notification system is exactly what AI-first companies need.”
Latest thinking
How AI Agents choose APIs
The 4-factor ranking algorithm behind intent matching — and why Tool Definition quality beats catalog size.
apitree vs RapidAPI
Agent-native vs developer-native: same market, fundamentally different architecture.
153 APIs, no key needed
Weather, crypto, NASA, Wikipedia — all callable right now through apitree proxy.
APIs reimagined.
Available today.
Start connecting APIs with the best AI-native developer experience.