APIbase.pro — The API Hub for AI Agents

One MCP endpoint. 504 tools. 159 providers. Pay per call with x402 (USDC on Base) or MPP (USDC on Tempo).

Live Platform | Tool Catalog | MCP Endpoint | Frameworks | Dashboard

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Product Demo

https://github.com/user-attachments/assets/9e598d61-b2d0-486c-bd34-f0cb0354d09c

12-slide walkthrough: connect → discover tools → 13-stage pipeline → dual-rail payments → analytics. Full interactive version →

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What is APIbase?

Production MCP server that gives AI agents access to 504 real-world API tools through a single endpoint. Agents connect once to https://apibase.pro/mcp and can search flights, get stock quotes, check weather and tides, query US Census and CDC health data, search ML models on HuggingFace, look up World Bank indicators, track streamflow from USGS stations, search 7M+ CS papers on DBLP, generate images, send emails, decode VINs, look up chemical compounds, scan npm/PyPI vulnerabilities, find EV chargers, search art at the Met Museum, batch multiple calls, track usage analytics — and 300+ more tools across 30+ categories.

Built for AI agents, not humans. Auto-registration, zero setup, pay-per-call via x402 USDC micropayments on Base or MPP (Machine Payments Protocol) on Tempo.

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Quick Start (30 seconds)

Claude Desktop / Cursor / Windsurf

{
  "mcpServers": {
    "apibase": {
      "url": "https://apibase.pro/mcp"
    }
  }
}

Multi-server setup (recommended)

Combine APIbase (real-world APIs) with Playwright (browser) and Context7 (docs):

{
  "mcpServers": {
    "apibase": { "url": "https://apibase.pro/mcp" },
    "playwright": { "command": "npx", "args": ["-y", "@playwright/mcp"] },
    "context7": { "command": "npx", "args": ["-y", "@upstash/context7-mcp"] }
  }
}

Via npm (stdio bridge)

{
  "mcpServers": {
    "apibase": {
      "command": "npx",
      "args": ["-y", "apibase-mcp-client"]
    }
  }
}

REST API

# Register and get API key
curl -X POST https://apibase.pro/api/v1/agents/register \
  -H "Content-Type: application/json" \
  -d '{"agent_name": "my-agent", "agent_version": "1.0.0"}'

# Call any tool
curl -X POST https://apibase.pro/api/v1/tools/finnhub.quote/call \
  -H "Authorization: Bearer ak_live_..." \
  -H "Content-Type: application/json" \
  -d '{"symbol": "AAPL"}'

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Tool Categories (504 tools, 159 providers)

Category	Tools	Providers	Examples
Web Search	11	Serper, Tavily, Exa, Spider.cloud	Google search, AI search, semantic search, web scraping
News & Events	10	NewsData, GDELT, Mastodon, Currents API	Global news (65 langs), crypto news, trending
Social	7	Bluesky, TwitterAPI.io	Search posts, profiles, feeds (AT Protocol, X/Twitter)
Travel & Flights	17	Amadeus, Sabre, Aviasales	Flight search, pricing, status, airports
Finance & Stocks	17	Finnhub, CoinGecko, ECB, FRED, World Bank	Stock quotes, OHLCV, FX rates, economic data, global indicators
Banking Data	6	FDIC BankFind, IBANAPI	US bank financials, branch locations, institution search, IBAN validation
Company Data	8	SEC EDGAR, Companies House, GLEIF	US filings + UK registry + global LEI (200+ countries)
Currency Conversion	2	ExchangeRate-API	160+ currencies, real-time conversion
Tax & VAT	3	VATcomply	EU VAT validation, rates, ECB exchange rates
Maps & Geo	7	Geoapify	Geocode, routing, POI search, isochrone
Address (US/CA)	2	Geocodio	Geocode, reverse geocode, USPS-standard
Real Estate	4	Walk Score, US Real Estate	Walkability, property listings, details
Entertainment	30	TMDB, Ticketmaster, RAWG, IGDB, Jikan, Met Museum, Rijksmuseum, CMA	Movies, events, games, anime, art collections
Art & Culture	5	Europeana, ARTIC	50M+ EU objects + 120K Chicago artworks
Stock Media	3	Pexels	Free stock photos & videos, commercial use
Music	9	MusicBrainz, ListenBrainz, RadioBrowser, AudD	Artists, albums, radio, song recognition, lyrics
Podcasts	7	PodcastIndex, Listen Notes	Search 4M+ podcasts, 186M+ episodes, best by genre
Health & Nutrition	9	USDA, OpenFDA, NIH, CDC	Food data, drug safety, supplements, public health datasets
Chemistry & Biology	16	PubChem, RCSB PDB, NCI CACTUS, Materials Project	100M+ compounds, 220K+ proteins, 150K+ materials, chemical ID converter
EV Charging	3	Open Charge Map	300K+ charging stations worldwide, connectors, power levels
Fraud Detection	4	IPQualityScore	IP/email/URL/phone fraud scoring, VPN/proxy/bot detection
Disease Data	7	disease.sh, WHO GHO	COVID/Influenza global disease statistics, WHO global health data
Clinical Trials	3	ClinicalTrials.gov	577K+ trials, drug research, recruiting
Nutrition Database	2	FatSecret	2.3M+ foods, calories, macros, vitamins
Education & Research	9	OpenAlex, arXiv, PubMed, CrossRef, DBLP	Papers, colleges, DOI lookup, CS bibliography
Jobs & Career	20	Adzuna, TheirStack, Jooble, Reed, Remotive, Arbeitnow, BLS, ESCO	Global job search, UK/EU/remote, salary data, tech stack analysis
Legal & Regulatory	8	Regulations.gov, Federal Register, CourtListener	US regulations, court opinions, executive orders
Air Quality	2	IQAir AirVisual	AQI, pollutants (PM2.5/O3), 30K+ stations
Weather	10	WeatherAPI.com, NWS, NOAA, NASA FIRMS	Current/forecast, hourly, observations, astronomy, alerts, fire detection
Space & Astronomy	9	NASA, JPL	APOD, asteroids, fireballs, solar flares
Translation	3	Langbly	90+ languages, language detection
Sports	7	API-Sports, BallDontLie	Football (2000+ leagues), NBA, NFL
Holidays & Calendar	3	Nager.Date, Calendarific	230+ countries, national/religious/observance
Image Generation	1	Stability AI	Stable Diffusion, 16 style presets
OCR	1	OCR.space	Text from images/PDFs, 20+ languages
Speech-to-Text	3	AssemblyAI	Transcribe audio, 99 languages, diarization
PDF & Documents	6	API2PDF, ConvertAPI	HTML/URL to PDF, DOCX↔PDF, 200+ formats
Email & SMS	4	Resend, Twilio	Send emails, SMS, phone lookup
Messaging	5	Telegram	Send messages, photos, documents via bot
URL Shortener	2	Short.io	Custom branded short links + stats
SSL & Domain	10	WhoisXML, ssl-checker.io, ThreatIntel	WHOIS, DNS, SSL, domain reputation, malware check
Barcode & QR	4	QRServer, UPCitemdb	Generate/read QR, barcode lookup
Business Intel	1	Hunter.io	Company emails, enrichment, 50M+ domains
E-commerce	12	Zinc, Canopy API, Diffbot, Zyte	Product search, Amazon (12 marketplaces), web extraction
Memes & Fun	2	Imgflip	100K+ meme templates, generate captioned meme images
AI Marketing	7	AIPush	AI-optimized pages, visibility scores
World Clock	3	TimeAPI.io	Timezone conversion, 597 IANA zones
Screenshots	1	ApiFlash	Chrome-based URL capture
Domain Registration	5	NameSilo	Check, buy, manage domains (.com $21)
Infrastructure	6	Cloudflare	DNS management, CDN cache, traffic analytics
Browser	4	Browserbase	Managed browser sessions, screenshots, scraping
Earthquakes	3	USGS	Global seismic data, real-time feeds
Water Data	2	USGS Water Services	Streamflow gauge sites, real-time water level & discharge
Tides & Currents	2	NOAA Tides & Currents	Water levels, tidal predictions, currents — 3,000+ US stations
Disasters	3	GDACS	UN global disaster alerts (earthquakes, floods, hurricanes, volcanoes)
IP Intelligence	2	ipapi.is	Geolocation, VPN/proxy detection
Vehicle Data	9	NHTSA, Auto.dev, MarketCheck	VIN decoder, recalls, safety ratings, car listings, market data
Country Data	2	REST Countries	Country search, ISO code lookup
Food Products	2	Open Food Facts	Barcode lookup, product search (3M+ products)
Test Data	1	RandomUser.me	Random user profiles for testing
Crypto & DeFi	26	CoinGecko, Polymarket, Hyperliquid	Prices, prediction markets, perpetuals
Logistics	7	17TRACK, DHL, ShipEngine	Multi-carrier tracking, shipping rates, address validation
Postal Codes	4	Zippopotam.us, Postcodes.io	Global postal lookup (60+ countries), UK postcodes
Platform	6	APIbase (internal)	Usage analytics, tool quality index, batch calls

Full tool catalog with schemas: https://apibase.pro/api/v1/tools

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Platform Features

Usage Analytics (Free)

Track your API usage — total calls, cost, cache hit rate, latency, and per-tool breakdown.

# Usage summary
curl -X POST https://apibase.pro/api/v1/tools/account.usage/call \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"period": "7d"}'

# Per-tool breakdown
curl -X POST https://apibase.pro/api/v1/tools/account.tools/call \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"sort": "cost", "limit": 10}'

# Time series (hourly/daily buckets)
curl -X POST https://apibase.pro/api/v1/tools/account.timeseries/call \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"period": "30d", "granularity": "day"}'

Tool Quality Index (Free)

Check tool reliability before calling — uptime, p50/p95 latency, error rate. Updated every 10 minutes.

# Quality metrics for a specific tool
curl -X POST https://apibase.pro/api/v1/tools/platform.tool_quality/call \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"tool_id": "crypto.get_price"}'

# Rankings — find the most reliable tools
curl -X POST https://apibase.pro/api/v1/tools/platform.tool_rankings/call \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"sort": "uptime", "limit": 20}'

Batch API (Free wrapper)

Execute up to 20 tool calls in parallel with a single request. Each sub-call runs the full pipeline independently. You pay only for individual tool calls.

# Via MCP tool
curl -X POST https://apibase.pro/api/v1/tools/platform.call_batch/call \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"calls": [
    {"tool_id": "crypto.get_price", "params": {"coin": "bitcoin"}},
    {"tool_id": "finance.exchange_rates", "params": {"from": "USD", "to": "EUR"}},
    {"tool_id": "country.by_code", "params": {"code": "US"}}
  ]}'

# Via REST endpoint
curl -X POST https://apibase.pro/api/v1/tools/call_batch \
  -H "Authorization: Bearer ak_live_..." \
  -d '{"calls": [...], "max_parallel": 10}'

Predictive Pre-fetching

When an agent calls a tool, the platform can automatically pre-fetch related data into cache. For example, a flight search pre-fetches exchange rates for the destination currency — so when the agent asks for rates next, it's an instant cache hit.

• Fire-and-forget: does not slow down the original response
• Controlled by PREFETCH_ENABLED env var (disabled by default)
• Rules: flight search → exchange rates, real estate → walk score, geocode → country data

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How Payment Works

APIbase supports dual payment rails — agents can pay using either protocol:

x402 (USDC on Base)

Field	Value
Protocol	x402 (HTTP 402 Payment Required)
Token	USDC on Base
Wallet	0x50EbDa9dA5dC19c302Ca059d7B9E06e264936480
Price range	$0.001 – $1.00 per call

MPP (Machine Payments Protocol)

Field	Value
Protocol	MPP (IETF draft-ryan-httpauth-payment)
Token	USDC on Tempo (chain 4217)
Wallet	0x183fFa1335EB66858EebCb86F651f70632821f8d
USDC contract	0x20C000000000000000000000b9537d11c60E8b50
SDK	mppx (npm)
Agent setup	wallet.tempo.xyz — one link, connected
Discovery	mpp.dev/services
Price range	$0.001 – $1.00 per call

No subscriptions. No minimums. Agent pays only for successful calls. Failed provider calls are auto-refunded.

13-Stage Pipeline

Every tool call passes through:

AUTH → IDEMPOTENCY → CONTENT_NEG → SCHEMA_VALIDATION → TOOL_STATUS →
CACHE → RATE_LIMIT → ESCROW → PROVIDER_CALL →
ESCROW_FINALIZE → LEDGER_WRITE → CACHE_SET → RESPONSE

• Escrow-first: USDC locked before provider call, refunded on failure
• Idempotent: same request + same key = same result, no double charges
• Cache: per-tool TTL (5s for stock prices, 7 days for walkability scores)
• Fail-closed: Redis down = reject all, no silent degradation

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Authentication

Method	Header	Format
API Key	Authorization	Bearer ak_live_<32hex>
x402 Payment	X-Payment	Base64 payment receipt
MPP Payment	Authorization	Payment <credential> (via mppx SDK)

Auto-registration: agents get API keys instantly on first request. No forms, no approval.

MPP Payment Flow (important for agent developers)

MPP uses a challenge–credential–receipt cycle. You MUST follow the full flow:

1. Agent → POST /api/v1/tools/{tool}/call (with Authorization: Bearer <key>)
2. Server → 402 + WWW-Authenticate: Payment id="...", method="tempo", request="..."
3. Agent signs payment on Tempo → retries with Authorization: Payment <credential>
4. Server verifies on-chain → 200 + Payment-Receipt header + tool result

Critical: Each 402 challenge is unique (HMAC-bound to the request URL, amount, and timestamp). You cannot reuse a credential from one challenge on a different endpoint or after expiry. The mppx SDK handles this automatically.

Using mppx SDK (recommended):

import { Mppx, tempo } from 'mppx/client'

// mppx auto-handles the full 402 → pay → retry cycle
const mppx = Mppx.create({
  methods: [tempo({ account: myTempoWallet })],
})

// This single call handles: request → 402 → sign → pay → retry → 200
const response = await fetch('https://apibase.pro/api/v1/tools/nasa.apod/call', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer ak_live_<your_key>',  // API key for agent identity
    'X-API-Key': 'ak_live_<your_key>',             // Preserved when mppx replaces Authorization
  },
  body: JSON.stringify({}),
})

Using Tempo CLI:

curl -fsSL https://tempo.xyz/install | bash
tempo wallet login
tempo request https://apibase.pro/api/v1/tools/nasa.apod/call -X POST --json '{}'

Using AgentCash (one command):

# Try any tool instantly
npx agentcash try https://apibase.pro

# Add all APIbase tools to your agent
npx agentcash add https://apibase.pro

Note: When mppx retries with Authorization: Payment, it replaces the original Bearer header. To preserve agent identity, also send your API key via X-API-Key header — the server accepts both.

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Error Codes (Agent-Friendly)

Every error response includes machine-readable recovery hints:

{
  "error": "rate_limit_exceeded",
  "error_code": "RATE_LIMIT_EXCEEDED",
  "message": "Too many requests",
  "request_id": "abc123",
  "suggested_action": "retry_after_delay",
  "documentation_url": "https://apibase.pro/frameworks#rest",
  "retry_after": 15
}

HTTP	Code	suggested_action
400	bad_request / schema_validation_failed	fix_request
401	unauthorized	fix_request
402	payment_required	add_payment
404	not_found	use_different_tool
429	rate_limit_exceeded	retry_after_delay
502	bad_gateway	retry_after_delay
503	service_unavailable	retry_after_delay

Troubleshooting (Dual-Rail Payments)

"MPP payment verification failed" on x402 requests

Symptom: Agent sends x402 payment (X-Payment header) but gets 400 MPP payment verification failed instead of data.

Root cause: If you use the mppx SDK with default settings, Mppx.create() installs a global fetch() polyfill that intercepts ALL HTTP requests — including x402 ones. When mppx sees a 402 response, it automatically signs an MPP credential and retries, even if the original request was x402. The MPP credential is invalid for x402 → server returns 400.

Fix: Initialize mppx with polyfill: false:

// WRONG — intercepts all fetch() calls including x402
const mppx = await Mppx.create({ wallet });

// CORRECT — only use mppx.fetch() explicitly for MPP payments
const mppx = await Mppx.create({ wallet, polyfill: false });

Then use mppx.fetch() only for MPP payments, and regular fetch() for x402.

Using both payment protocols

APIbase supports dual-rail payments. Each request should use ONE protocol:

Protocol	Header	When to use
x402	X-Payment: <signed-payload>	Default. Use with Coinbase CDP or PayAI facilitator
MPP	Authorization: Payment <credential>	Use with Tempo wallet and mppx SDK

Do NOT send both headers in the same request — both middleware will activate and one will fail.

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MCP Discovery

GET  /.well-known/mcp.json              → MCP server metadata (transport, capabilities, tools count)
GET  /.well-known/mcp/server-card.json  → Full tool catalog with schemas (Smithery)
GET  /.well-known/ai-capabilities.json  → AI capabilities manifest (21 categories)
GET  /.well-known/agent.json            → A2A agent card (protocol, auth, payment)
GET  /.well-known/x402-payment.json     → Payment config (network, facilitators, dual-rail)
GET  /.well-known/openapi.json          → OpenAPI 3.1 spec (with x-payment-info)
GET  /ai.txt                            → Plain text AI agent discovery
GET  /llms.txt                          → Concise LLM context
GET  /api/v1/tools                      → Live tool catalog (all 490 tools, JSON schemas)
GET  /health/ready                      → System health check
POST /mcp  prompts/get discover_tools   → Browse tools by category or task (progressive disclosure)
GET  /frameworks                        → Integration guides for 9 frameworks

Progressive disclosure: Instead of loading all 490 tool schemas into context, agents can call the discover_tools prompt to find relevant tools first:

• discover_tools (no args) → 21 categories with tool counts
• discover_tools category="travel" → 17 travel tools
• discover_tools task="check earthquake near Tokyo" → matching tools ranked by relevance

Tool composition hints: Task-based search results include related tool suggestions:

- amadeus.flights.search: Search for real-time flight offers...
  → Related: amadeus.flight_price (Confirm exact pricing), finance.exchange_rates (Convert to local currency)

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Integrations

Every framework connects to one endpoint: https://apibase.pro/mcp

Platform	Config	Docs
Claude Desktop / Code	"url": "https://apibase.pro/mcp"	3 lines JSON
Cursor IDE	.cursor/mcp.json → same URL	3 lines JSON
Windsurf (Codeium)	"serverUrl": "https://apibase.pro/mcp"	3 lines JSON
OpenAI Agents SDK	MCPServerStreamableHTTP(url=...)	Python + TS
LangChain / LangGraph	MultiServerMCPClient({"apibase": {...}})	Python
Google ADK	McpToolset(StreamableHTTPConnectionParams(...))	Python
CrewAI	mcp_servers=["https://apibase.pro/mcp"]	1 line
Microsoft Copilot Studio	UI: Actions → Add MCP Server	Enterprise

Full framework guides with code examples →

Registry Listings

Registry	Link
Smithery	smithery.ai/servers/apibase-pro/api-hub
Glama	glama.ai/mcp/servers/whiteknightonhorse/APIbase
MCP Registry	io.github.whiteknightonhorse/apibase
PulseMCP	pulsemcp.com (auto-synced)
MPPScan	mppscan.com

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Architecture

• 16 Docker containers: API, Worker, Outbox, PostgreSQL, Redis, Nginx, Prometheus, Grafana, Loki, Promtail, Alertmanager, exporters
• Single Hetzner server with automated health checks, graceful shutdown, and 27 Prometheus alert rules
• PostgreSQL = source of truth for financial data (append-only ledger)
• Redis = cache, rate limiting, single-flight deduplication
• Fail-closed: any infrastructure failure = reject requests, never pass through

Self-Hosting

Prerequisites

• Docker 24.0+ with Compose v2.0+
• 8GB+ RAM (16 containers)
• Ports: 8880 (Nginx), 3000 (API), 5432 (Postgres), 6379 (Redis) — all internal

Quick Start

git clone https://github.com/whiteknightonhorse/APIbase.git
cd APIbase
cp .env.example .env    # edit: set POSTGRES_PASSWORD, X402_PAYMENT_ADDRESS, provider keys
docker compose build
docker compose -f docker-compose.yml -f docker-compose.prod.yml up -d

Verify

# Health check (Nginx on 8880)
curl http://localhost:8880/health/ready

# Check all 16 containers
docker compose ps

# View API logs
docker compose logs api --tail 20

See .env.example for all configuration options. Never commit .env to git.

License

MIT