AI web research brief with cited sources API

AI research brief on one question from a live web search: a summary of up to 200 words, up to 8 findings each with citation URLs checked against the search tool's own records (uncited claims are dropped), the source URLs consulted, and an as-of date. Depth quick (up to 2 searches) or standard (up to 4); optional since date. AI-generated under a fixed Kit Rx prompt and can be wrong. No personal profiles, patient-specific medical advice or investment calls.

$0.15 per call USDC over x402 v2 on Base, Polygon, Arbitrum, Avalanche or Sei. No signup, no API key. Requests that fail or match nothing are not charged.

Endpoint

GET https://api.kit-rx.com/v1/research/brief

Parameters

Name	Type	Required	Description
`q`	string	yes	Research question, 5 to 400 characters (URL-encoded). Treated as data to research, not as instructions. e.g. `What do the EU AI Act rules require of general-purpose AI model providers?`
`depth`	string: quick, standard	no	quick (at most 2 web searches, 3-5 findings) or standard (up to 4 searches, 4-8 findings, default). Same price. e.g. `quick`
`since`	string	no	Only report developments from this date on, as YYYY-MM-DD (1900-01-01 to today, UTC). Steers the search; source dates are not verified. e.g. `2025-01-01`

Example request

https://api.kit-rx.com/v1/research/brief?q=What+do+the+EU+AI+Act+rules+require+of+general-purpose+AI+model+providers%3F&depth=quick

Without payment the server answers 402 Payment Required with the price (150000 atomic USDC) in the PAYMENT-REQUIRED header. Any x402 v2 client pays and retries automatically. A request with no parameters runs this example.

curl -i "https://api.kit-rx.com/v1/research/brief?q=What+do+the+EU+AI+Act+rules+require+of+general-purpose+AI+model+providers%3F&depth=quick"

Pay from an agent

AgentCash: fetch the URL. OpenDexter MCP: x402_fetch. Kit Rx MCP server: https://api.kit-rx.com/mcp. Code:

import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.BUYER_KEY) });
const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://api.kit-rx.com/v1/research/brief?q=What+do+the+EU+AI+Act+rules+require+of+general-purpose+AI+model+providers%3F&depth=quick");
console.log(await res.json());

Example response

{
  "query": {
    "q": "What do the EU AI Act rules require of general-purpose AI model providers?",
    "depth": "quick",
    "since": null
  },
  "result": {
    "summary": "Since 2 August 2025, providers of general-purpose AI models must maintain technical documentation, provide relevant model information to downstream AI-system providers, establish a policy to comply with EU copyright law, and publish a sufficiently detailed summary of training content. [1][2] Providers of models presenting systemic risk have additional duties, including notifying the Commission, evaluating and mitigating risks, reporting serious incidents, and ensuring cybersecurity. [2][3] Certain qualifying open-source models may be exempt from documentation and downstream-information duties, but not from copyright-policy and training-summary requirements; the exemptions do not apply to models with systemic risk. [1][2]",
    "findings": [
      {
        "claim": "Providers must keep technical documentation up to date for authorities and make information and documentation available to downstream AI-system providers so they can understand the model’s capabilities and limitations and meet their own obligations.",
        "citations": [
          {
            "url": "https://eur-lex.europa.eu/eli/reg/2024/1689",
            "title": "EUR-Lex - 02024R1689-20260727 - EN - EUR-Lex"
          },
          {
            "url": "https://digital-strategy.ec.europa.eu/en/faqs/guidelines-obligations-general-purpose-ai-providers",
            "title": "Guidelines on obligations for General-Purpose AI providers | Shaping Europe’s digital future"
          }
        ]
      },
      {
        "claim": "Providers must put in place a policy to comply with EU copyright and related-rights law, including identifying and respecting rights reservations, and publicly release a sufficiently detailed summary of model training content.",
        "citations": [
          {
            "url": "https://eur-lex.europa.eu/eli/reg/2024/1689",
            "title": "EUR-Lex - 02024R1689-20260727 - EN - EUR-Lex"
          },
          {
            "url": "https://digital-strategy.ec.europa.eu/en/faqs/guidelines-obligations-general-purpose-ai-providers",
            "title": "Guidelines on obligations for General-Purpose AI providers | Shaping Europe’s digital future"
          }
        ]
      },
      {
        "claim": "Providers of models with systemic risk must meet additional duties, including Commission notification, model evaluation, systemic-risk assessment and mitigation, serious-incident reporting, and adequate cybersecurity protections.",
        "citations": [
          {
            "url": "https://eur-lex.europa.eu/eli/reg/2024/1689",
            "title": "EUR-Lex - 02024R1689-20260727 - EN - EUR-Lex"
          },
          {
            "url": "https://digital-strategy.ec.europa.eu/en/factpages/general-purpose-ai-obligations-under-ai-act",
            "title": "General-purpose AI obligations under the AI Act | Shaping Europe’s digital future"
          }
        ]
      },
      {
        "claim": "Some models under qualifying free and open-source licences are exempt from technical-documentation and downstream-information duties, but the exemptions do not apply to models with systemic risk; the copyright-policy and public-training-summary duties still apply to open-source providers.",
        "citations": [
          {
            "url": "https://eur-lex.europa.eu/eli/reg/2024/1689",
            "title": "EUR-Lex - 02024R1689-20260727 - EN - EUR-Lex"
          },
          {
            "url": "https://digital-strategy.ec.europa.eu/en/faqs/guidelines-obligations-general-purpose-ai-providers",
            "title": "Guidelines on obligations for General-Purpose AI providers | Shaping Europe’s digital future"
          }
        ]
      },
      {
        "claim": "The Commission states that the GPAI-provider obligations began applying on 2 August 2025.",
        "citations": [
          {
            "url": "https://digital-strategy.ec.europa.eu/en/faqs/guidelines-obligations-general-purpose-ai-providers",
            "title": "Guidelines on obligations for General-Purpose AI providers | Shaping Europe’s digital future"
          },
          {
            "url": "https://digital-strategy.ec.europa.eu/en/factpages/general-purpose-ai-obligations-under-ai-act",
            "title": "General-purpose AI obligations under the AI Act | Shaping Europe’s digital future"
          }
        ]
      }
    ],
    "sources": [
      {
        "url": "https://digital-strategy.ec.europa.eu/en/faqs/guidelines-obligations-general-purpose-ai-providers",
        "title": "Guidelines on obligations for General-Purpose AI providers | Shaping Europe’s digital future"
      },
      {
        "url": "https://eur-lex.europa.eu/eli/reg/2024/1689",
        "title": "EUR-Lex - 02024R1689-20260727 - EN - EUR-Lex"
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/factpages/general-purpose-ai-obligations-under-ai-act",
        "title": "General-purpose AI obligations under the AI Act | Shaping Europe’s digital future"
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/faqs/general-purpose-ai-models-ai-act-questions-answers",
        "title": null
      },
      {
        "url": "https://eur-lex.europa.eu/eli/reg/2024/1689/2026-07-27/eng/pdf",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/faqs/navigating-ai-act",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/miscellaneous/complaints-channel-downstream-providers-using-general-purpose-ai-models",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/faqs/template-general-purpose-ai-model-providers-summarise-their-training-content",
        "title": null
      },
      {
        "url": "https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?from=EN&uri=CELEX%3A32024R1689",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/policies/guidelines-gpai-providers",
        "title": null
      },
      {
        "url": "https://eur-lex.europa.eu/eli/reg/2024/1689/oj/eng/pdf",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/factpages/ai-act",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/news/eu-rules-general-purpose-ai-models-start-apply-bringing-more-transparency-safety-and-accountability",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/policies/regulatory-framework-ai",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/news/learn-more-about-guidelines-providers-general-purpose-ai-models",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/node/13990/printable/pdf",
        "title": null
      },
      {
        "url": "https://digital-strategy.ec.europa.eu/en/node/13982/printable/pdf",
        "title": null
      }
    ],
    "as_of": "2026-11-15",
    "depth": "quick",
    "since": null,
    "searches": 1,
    "findings_dropped": 0,
    "ai_generated": true
  },
  "sources": [
    {
      "name": "Kit Rx AI web research (AI-generated text from a live web search)",
      "url": "https://api.kit-rx.com/docs/research-brief"
    },
    {
      "name": "EUR-Lex - 02024R1689-20260727 - EN - EUR-Lex",
      "url": "https://eur-lex.europa.eu/eli/reg/2024/1689"
    },
    {
      "name": "Guidelines on obligations for General-Purpose AI providers | Shaping Europe’s digital future",
      "url": "https://digital-strategy.ec.europa.eu/en/faqs/guidelines-obligations-general-purpose-ai-providers"
    },
    {
      "name": "General-purpose AI obligations under the AI Act | Shaping Europe’s digital future",
      "url": "https://digital-strategy.ec.europa.eu/en/factpages/general-purpose-ai-obligations-under-ai-act"
    }
  ],
  "notes": [
    "AI-generated research brief from a live web search under a fixed Kit Rx prompt. Findings can be incomplete, out of date or wrong; check them against the cited pages.",
    "Citation URLs come from the search tool's own records, not from model-written text; a title is the page title from those records or, when they have none, the one the model reported. When the brief is shown to people, show each finding's citations as clickable links next to the claim; bracketed numbers in the summary refer to findings."
  ],
  "generated_at": "2026-11-15T05:56:44.464Z"
}

Kit Rx: Pay-per-call data and safety tools for AI agents, paid in USDC over x402. No signup, no API key. Machine-readable: OpenAPI, llms.txt, /.well-known/x402, agent skills.