AI search

The AI search MCP + API: ask every model one question, get every answer. One prompt in, every model's answer out.

The primitive the whole API is built on. Pass a prompt to /v1/search and get back the full prose answer from ChatGPT, Claude, Perplexity, and Gemini in one response, each with the sources it cited. Query all four or pick the ones you need.

  • $1 free on signup
  • Credits never expire
  • No subscription
  • MCP native
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WHAT YOU CAN ASK

Ask in plain language. Get structured JSON.

Each is one call against the endpoint, ask in plain English through the MCP, or hit the API directly. Same key, same credit balance.

You ask“Ask every model: best AI blog tool?”
You get{ "models": 4, "answered": 4, "cost": "$0.32" }
You ask“What did Claude actually answer?”
You get{ "claude": { "answer": "Penflow, …", "citations": 3 } }
You ask“Which sources did each model cite?”
You get{ "chatgpt": ["penflow.com", "g2.com"] }
Why ask every model

Your buyers don't ask one AI. Why measure one?

A brand ChatGPT names first can be invisible on Gemini. One call to /v1/search asks all four and hands back every answer with citations, in one JSON shape:

  • Diff the answers for the consensus pick and the outlier.
  • Feed the JSON straight into a research agent.
  • Replay identical prompts from cache at $0.
AI MODELS (4)

Every model, one API key.

One call reaches all 4 AI models, ChatGPT, Claude, Perplexity, and Gemini, or pass “models” to narrow to the ones you need. Billed per model queried.

  • ChatGPT

    OpenAI

    Web search on

    The highest-traffic AI surface

  • Claude

    Anthropic

    Web search tool

    Cited, source-grounded answers

  • Perplexity

    Perplexity Sonar

    Web-grounded

    Always answers from live sources

  • Gemini

    Google

    Google Search grounding

    Google's own model layer

  • Google AI Overviews

    Google Search

    Live SERP

    The AI summary atop Google results

PRICED FOR REAL WORK

Real scenarios. Real numbers.

Real workflows, real call counts, real totals, see what this looks like before you commit. Credits never expire.

  • founder

    Validate your positioning

    Ask all four models the 15 category questions your buyers type into AI, and see who they recommend and why. 15 calls · $4.80 total.

  • content strategist

    Mine answers for a brief

    Run 10 topic prompts across every model, then diff the four answers to find the angles they all miss. 10 calls · $3.20 total.

  • agent builder

    Power a research agent

    Wire cite42_search into your agent so one tool call returns every model’s answer + citations as JSON. 100 calls · $32.00 total.

vs. calling each model yourself

One endpoint, or four integrations you maintain forever.

Wiring up the OpenAI, Anthropic, Google, and Perplexity SDKs yourself works, until web search, citation parsing, and four invoices become a permanent maintenance tax. Same job, both ways.

Cite42Four SDKs yourself
IntegrationOne endpoint, one key, one JSON shapeFour SDKs, four auth flows, four response shapes
Web searchOn by default, configured per modelEnabled differently per provider; easy to get wrong
CitationsNormalized to { url, title }[] for every modelPerplexity lists, ChatGPT inlines, you reconcile both
BillingOne prepaid balance, billed per model per callFour invoices and rate limits to track
Repeat queriesCross-customer cache replays identical prompts at $0Pay full price every time
Cost, 4-model answer$0.32 ($0.08 per model), or $0 on a cache hitFour providers summed + your eng time
PRICING

Pay per call. $25 minimum deposit. Credits never expire.

This page's endpoints below. See /pricing for the full per-endpoint table.

EndpointPriceWhat you get
POST/v1/search$0.08/modelFull prose answer + citations from each model, $0.08 per model per call, all four for $0.32

See all endpoints and the model coverage table →

KEEP EXPLORING

Related endpoints

Same API key, same credit balance, different question.

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QUESTIONS

Questions about ai search.

One key, one request, one bill instead of four SDKs, four API keys, and four billing relationships. We also enable web search per model correctly (it is not implied by the model string), normalize citations into one shape, and cross-customer cache identical prompts so repeats cost you nothing.
ChatGPT, Claude, Perplexity, and Gemini. Omit "models" to query all four; pass a subset to query fewer and pay less. Each model's answer comes back keyed separately so you can compare them.
Close, not identical. We use each model's official API with web search enabled. API-mode responses correlate strongly with consumer mode for research and category questions; consumer mode adds personalization and memory the API can't replicate.
$0.08 per model per call, $0.32 for a full four-model sweep, or $0.08 if you only want one. Identical prompts hit the cross-customer cache and cost $0 on a repeat within 24h. No subscription, $25 minimum that never expires.
Yes. Install the Cite42 MCP server in Claude Code, Claude.ai, ChatGPT, Cursor, or Codex, then just ask your question in plain English, the agent calls cite42_search and returns the answers.
Yes. Pass a "models" array, e.g. ["chatgpt"] or ["claude","perplexity"], to query only the models you name, and you're billed only for those. Omit the field and the call fans out to all four. A single-model call is $0.08; the full four-model sweep is $0.32.
The four models run in parallel, not in series, so a call returns in roughly the time of the slowest single model rather than the sum of all four. We use Promise.allSettled under the hood, so one slow or failing model never blocks or fails the others, you still get the answers that came back.
Every model's sources are normalized into the same array of { url, title } objects, regardless of whether the provider gave explicit citations (Perplexity) or inline references (ChatGPT). You don't write per-provider parsing, the shape is identical across all four models.
The only persistent state is billing and the response cache. Cached answers are keyed by prompt + model and are cross-customer by design (that's what makes repeats free), but there's no per-user conversation history or memory, the API is stateless. If you need isolation from the shared cache, get in touch.
READY WHEN YOU ARE

Ask every AI model your first question.

$1 free on signup. No subscription. No sales call.

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Cite42 + MCP - Ask Every AI Model One Question, Get Every Answer | Cite42 | Cite42