API v1 is live

Ground every AI answer in verified, cited sources

Groundlink is a pay-per-query API that AI models call on every search. It returns verified results — real URLs, snippets, and a source label — so chatbots, agents, and assistants answer with citations instead of hallucinating.

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POST https://9ea69cec60fa01f65bbb647a092bcbb4.ctonew.app/api/v1/ground · Bearer auth · typically <1s

Start calling the API in under a minute

Get a real API key right now — no signup, no card, no sales call. It works on the live endpoint immediately, with free queries included.

Get your free API key

One click, no signup, no card. You get a key good for 100 free queries on the live endpoint with verified, cited results.

How it works

One request in, cited results out. The response is small, flat, and shaped for LLMs: every result carries the fields a model needs to cite its answer.

The model sends a query

Your agent, chatbot, or assistant calls Groundlink with a natural-language question — automatically, on every search where it needs a verifiable answer.

Groundlink returns verified results

Free, reliable sources (Wikipedia and DuckDuckGo for v1) return top matches with a real URL, a readable snippet, and a source label — no invented facts.

The model answers with citations

Every claim in the reply can point at a URL the user can click. The answer is correct because the model grounded it in what the sources actually say.

What the model actually gets

✓title — a clean, human-readable heading
✓url — a real, clickable source link
✓snippet — a short excerpt the model can quote
✓source — a label for attribution ("wikipedia", "duckduckgo")

{
  "query": "James Webb Space Telescope",
  "results": [
    {
      "title": "James Webb Space Telescope",
      "url": "https://en.wikipedia.org/wiki/James_Webb_Space_Telescope",
      "snippet": "The James Webb Space Telescope (JWST) is a space
telescope designed to conduct infrared astronomy...",
      "source": "wikipedia"
    },
    {
      "title": "James Webb Space Telescope Category",
      "url": "https://duckduckgo.com/c/James_Webb_Space_Telescope",
      "snippet": "James Webb Space Telescope Category",
      "source": "duckduckgo"
    }
  ],
  "meta": {
    "request_id": "7b36dfd4-3ca3-408c-9791-96c1bf2e4603",
    "result_count": 2,
    "processing_ms": 500
  }
}

Built for AI systems that must be right

If your product generates language, Groundlink plugs into its tool-calling loop — one HTTPS call, no SDK required.

Chatbots

Product-facing assistants that need every answer traceable to a source users can open.

AI agents

Autonomous agents that browse, summarize, and act — grounding keeps their decisions on real facts.

Copilots & assistants

Developer tools and workplace copilots that must return verifiable, professional answers.

Model platforms

API and platform providers that want retrieval-grounded outputs by default, at scale.

Pricing that scales with volume

pay-per-query micro-fees — from under one cent per query — so grounding is an automatic step in every search, not a budget decision.

Pay-per-query

Core model

Pay-per-query micro-fees: each grounding call costs a micro-fee — cheap enough that an AI can call it automatically on every search, with no human in the loop. Revenue comes from massive transaction volume, not big per-customer fees.

from under one cent per query

Free tier for testing

Get an API key and run real queries against the live endpoint before committing anything — no card required to start.

No charge

Prepaid credits

A human funds the account once; the AI auto-consumes credits per call. Volume tiers kick in as usage scales. This is the billing shape — wiring happens before launch.

Fund once, run forever

Indicative only — final per-call pricing will be set by Groundlink before billing goes live. The pricing model above is the plan; specific per-call figures are decided by Groundlink before billing is wired.

Plugs into any tool-calling loop

Groundlink is a plain HTTPS + JSON API. Advertise ground_search as a tool, then call the endpoint when the model asks. Works with OpenAI-style function calling, Anthropic tool use, MCP, or any framework that can issue an HTTP request.

✓ No SDK to install — one fetch call
✓ CORS enabled; call it from anywhere
✓ Usage metered per API key

See the integration guide

// Advertise the tool to the model (OpenAI-style function calling)
const tools = [{
  type: "function",
  function: {
    name: "ground_search",
    description: "Search Groundlink for verified, citable web results.",
    parameters: {
      type: "object",
      properties: {
        query: { type: "string", description: "The query to ground." },
        max_results: { type: "integer", minimum: 1, maximum: 10 }
      },
      required: ["query"]
    }
  }
}];

// When the model emits a tool call, fetch verified results
const res = await fetch(BASE_URL + "/api/v1/ground", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": "Bearer glk_..."
  },
  body: JSON.stringify({ query: "James Webb Space Telescope" })
});
const { results } = await res.json();
// -> answer with citations from results[].url

Stop answering from memory. Start answering from sources.

One page of docs, one endpoint, one API key. Get your first grounded response in minutes.

Read the docs — it's one page