API Docs | LLM Sleuth

Quick Start

The production API base is https://llmsleuth.com. Use API keys from your dashboard. Local and preview domains should not be used in documentation or customer integrations.

curl https://llmsleuth.com/api/v1/query \
  -H "Authorization: Bearer asc_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "query": "What is the best lead scraping tool?",
    "providers": ["openai", "anthropic", "gemini"]
  }'

Authentication

Send your key as a bearer token. Keys start with asc_. Provider API keys stay on the LLM Sleuth server.

Authorization: Bearer asc_your_api_key

Run Query

POST/api/v1/query

Field	Type	Description
query	string	The question or research prompt to run.
providers	array	Any mix of openai, anthropic, and gemini. xAI can be enabled later when credits are available.

Providers

ID	Provider	Search capture
openai	ChatGPT / OpenAI	Captures Responses API web search calls and source annotations.
anthropic	Claude / Anthropic	Captures web_search tool inputs and citations when returned.
gemini	Gemini / Google	Captures grounding search queries and grounding chunks when returned.

Response Shape

The response includes an execution_id. You can open that run later in the dashboard history.

{
  "execution_id": "7f79c814-1112-4a94-9bb4-719d5ccf5e98",
  "query": "What is the best lead scraping tool?",
  "providers": ["openai", "anthropic", "gemini"],
  "results": [
    {
      "provider": "openai",
      "label": "ChatGPT / OpenAI",
      "ok": true,
      "generatedQueries": ["best lead scraping tools 2026"],
      "sources": [{ "url": "https://example.com/source" }],
      "sourcePreviews": [
        {
          "url": "https://example.com/source",
          "fetchStatus": 200,
          "headings": [{ "level": 1, "text": "Best Lead Tools" }]
        }
      ],
      "answer": "Markdown answer text..."
    }
  ]
}

Errors

Field	Type	Description
401	auth	Missing or invalid API key.
402	credits	Not enough credits for the selected provider count.
400	input	Invalid JSON, missing query, or no valid providers selected.
500	server	Provider or persistence failure.

Each selected provider costs one credit. A three-provider comparison uses three credits.

Try it visually first

The search lab uses the same provider runner and stores executions for history.

Open search lab