> For the complete documentation index, see [llms.txt](https://even-financial.gitbook.io/developer-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://even-financial.gitbook.io/developer-center/marketplace-integrations/hybrid-api.md).

# Hybrid API

Hybrid API integrations sit between fully hosted and fully custom: you call Engine's API directly, but the two products here serve different purposes.

* **Offer Wall API** is for consumers you already have data on, it returns actual matched offers (plus a ready-made hosted results page), so you can either render those offers in your own UI or redirect to Engine's hosted experience.
* **Second Party Prefill API** doesn't return offers at all, it lets you pass whatever partial consumer data you already have into Engine's hosted or embedded application flow so the consumer isn't asked to re-enter it; the actual offers are only generated after that flow is completed

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="files"></th></tr></thead><tbody><tr><td><strong>Offer Wall API</strong></td><td>Call Engine's API to generate matched offers using consumer data you already have, then render them yourself or redirect to Engine's hosted results page.</td><td><a href="/pages/KwgbRNY5yTxc2Byf5PXo">1st &#x26; 2nd Look Marketplace ↗</a></td><td><a href="/pages/fE0IGwkJexRfGM4TOUns">New Marketplaces - Offer Carousel ↗</a></td><td><a href="/pages/KOrTDU5l608GyBGXLNT5">/pages/KOrTDU5l608GyBGXLNT5</a></td><td></td></tr><tr><td><strong>Second Party Prefill API</strong></td><td>Pass partial consumer data to Engine to pre-populate a hosted or embedded application, reducing how much the consumer has to re-enter.</td><td><a href="/pages/c931d9f13b119e10ff20ff1be3496b79bbbd30f4">Loans Marketplaces ↗</a></td><td><a href="/pages/be122c10a2a2ce5fe5a5914da2e9b37ac648490b">Credit Cards Marketplace ↗</a></td><td><a href="/pages/KOrTDU5l608GyBGXLNT5">/pages/KOrTDU5l608GyBGXLNT5</a></td><td></td></tr></tbody></table>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://even-financial.gitbook.io/developer-center/marketplace-integrations/hybrid-api.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.