AgentNexus MCP Server

Agent Nexus

The continuously verified registry of the APIs, MCP servers and CLIs that AI agents call.

Live: https://agentnexus.app · MCP endpoint (no login): https://agentnexus.app/api/public/mcp

Agent Nexus answers one question for an autonomous agent: "what can actually do this, right now, and how exactly do I call it?" Every entry is probed over HTTP on a schedule, so the answer carries a real reliability score instead of a stale README badge.

Listed on the official MCP registry as app.agentnexus/agent-nexus, on Smithery, on Glama, on Appside (owner-verified, live handshake check) and on the M8ven Trust Index.

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Connect an agent in one line

Start with a completed task, not just a search: obtain Berlin's weather through a discovered public API. The example below needs Python 3 only—no account, key, extra packages, or payment. Agent Nexus finds the service; the example calls the provider directly.

Official integrations

Use only the package names linked above; unrelated projects also use the AgentNexus name. A free key gives 1,000 calls/day shared across compatible clients; keep it private. Anonymous discovery remains available at 100 calls/day per source address.

Complete your first task

From a checkout of this repository:

python3 examples/first_weather_task.py

The example discovers Bright Sky, checks the returned no-key contract and expected HTTPS host, then requests Berlin's current weather using the provider's documented /current_weather endpoint. It prints the temperature, conditions and observation timestamp only after receiving a complete provider response. If discovery, the contract or the provider response changes, it stops without claiming success. It never books, pays, creates a key, or submits an invocation report.

Live check on October 30, 2026: discovery and the direct provider request both returned HTTP 200; the observation at 08:00 UTC was 7.5 °C and fog. This is an example result, not a promise of future availability or identical weather. This verification is our own test—not evidence of customer activation.

For a different task, read the returned service's authentication and pricing requirements before calling it. Report an outcome only after an actual invocation; discovery and health probes alone do not prove task completion.

MCP (Streamable HTTP, stateless, anonymous — no consent screen, no key):

{
  "mcpServers": {
    "agent-nexus": {
      "type": "http",
      "url": "https://agentnexus.app/api/public/mcp"
    }
  }
}

Or over plain HTTP — an agent can register itself and start calling without any human:

# 1. get your own key (instant, free tier: 1000 calls/day)
curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"capability discovery"}'

# 2. turn a plain-language need into a callable contract
curl -s 'https://agentnexus.app/api/public/discover?need=send%20transactional%20email' \
  -H 'x-api-key: nx_...'

MCP tools

Machine-readable surfaces

Human pages

/explore · /connect · /status · /pricing · /keys

Case studies

• Remote Jobs API (Nova) — 14-day freshness pilot: 1.01M → 1.46M live listings, 32 → 82 sources, all 82 reporting source_last_updated, 100% probe reliability. Approved by Nova. Web version

Tiers

Stack

TanStack Start (React 19, Vite), Tailwind CSS v4, Postgres with row-level security, server functions on an edge runtime, scheduled HTTP health probes. Built with Lovable.

Only publishable keys live in this repository; every secret is held server-side.

Development

git clone https://github.com/Strategiumfinancepartner/AgentNexus.git
cd AgentNexus
npm i
npm run dev

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Agent Nexus · support@agentnexus.app

Publisher alerts

Publisher-plan entries get alerts on what actually breaks agents, not just "it answers":

• Confirmed outage: sent only after 2 consecutive failed checks, plus a recovery notice. Checks are hourly, so outages shorter than an hour can be missed.
• Structure change: the response no longer matches its documented contract.
• Stale data per source: e.g. "12 of 83 sources not updated for 24h+", with your own age and volume thresholds. One alert per change, no repeats.
• Per-source volume: an alert when any single source drops to zero live records (even if the overall total looks healthy), when it loses more than a chosen share since the previous hourly check (80% by default), and when it comes back.
• Delivery: email and webhook signed with x-agentnexus-signature: sha256=<HMAC-SHA256 of raw body>; failed sends are retried up to 5 times; test button and 30-alert history on your entry page.

Live evidence for any entry: GET https://agentnexus.app/api/public/health-card/<slug> (includes data_quality and outage).