# Marketplace — 51 machine-payable APIs

Every endpoint shares one contract, one price ($0.003 USDC per call), and one settlement path (Base mainnet USDC to `0x05e82e03753c7bc99fb24d10a876cce53f24b7b7`).

## Trust / verified

- **Settlement-verified on PayAPI Market** — `payment_verified: true`, `status: live`. A third party paid real USDC on Base and received a real response. Listing: https://payapi.market/api/marketplace-for-ai-agents (agent API: https://payapi.market/agent/get?id=marketplace-for-ai-agents).
- **Listed / routable on agent402.tools** — listed with `routable: true`, `health: 1`, origin `https://marketplaceforaiagents.com`, 51 tools.
- **Settle only on upstream 2xx** — a failed upstream call returns `502 upstream_error` and is not charged.
- **51 endpoints** — 38 single engines + 13 named intent chains. Intent price is $0.003 x steps and the billed chain is advertised in the 402 response.
- **Public MCP** — https://marketplaceforaiagents.com/mcp. Payment is the auth; there is no OAuth and no signup.
- **Payee and asset** — payTo `0x05e82e03753c7bc99fb24d10a876cce53f24b7b7`, USDC on Base `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. Allowlist both before signing.

x402 Bazaar validate passes; the CDP discovery index may lag (CDP issue #2207).


## video (5)

- **YouTube Transcripts API** — `GET /api/public/v1/youtube-transcripts`. Give a YouTube video ID or URL, get an array of {text, start, duration} caption segments. Required: `video_id`. Results key: `transcripts`. Spec: https://marketplaceforaiagents.com/agent/listings/youtube-transcripts.md
- **YouTube Video API** — `GET /api/public/v1/youtube-video`. Give a video ID, get title, channel, view/like counts, publish date, and description text. Required: `video_id`. Results key: `video_results`. Spec: https://marketplaceforaiagents.com/agent/listings/youtube-video.md
- **YouTube Search API** — `GET /api/public/v1/youtube-search`. Give a query, get ranked YouTube videos with IDs you can feed into the transcripts endpoint. Required: `q`. Results key: `video_results`. Spec: https://marketplaceforaiagents.com/agent/listings/youtube-search.md
- **Google Videos API** — `GET /api/public/v1/google-videos`. Give a query, get cross-platform video results with source URLs. Required: `q`. Results key: `video_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-videos.md
- **Bing Videos API** — `GET /api/public/v1/bing-videos`. Give a query, get video results across publishers with durations. Required: `q`. Results key: `video_results`. Spec: https://marketplaceforaiagents.com/agent/listings/bing-videos.md

## web search (7)

- **Google Search API** — `GET /api/public/v1/google-search`. Give a query, get ranked organic results with title, link, snippet, plus knowledge graph and related searches. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-search.md
- **Bing Search API** — `GET /api/public/v1/bing-search`. Give a query, get Bing organic results — a second opinion against Google rankings. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/bing-search.md
- **DuckDuckGo Search API** — `GET /api/public/v1/duckduckgo-search`. Give a query, get DuckDuckGo organic results with title, link, and snippet. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/duckduckgo-search.md
- **Yandex Search API** — `GET /api/public/v1/yandex-search`. Give a query, get Yandex organic results for regional coverage. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/yandex-search.md
- **Baidu Search API** — `GET /api/public/v1/baidu-search`. Give a query, get Baidu organic results for China-market coverage. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/baidu-search.md
- **Naver Search API** — `GET /api/public/v1/naver-search`. Give a query, get Naver results across web, blog, and news verticals. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/naver-search.md
- **Yahoo Search API** — `GET /api/public/v1/yahoo-search`. Give a query, get Yahoo organic results. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/yahoo-search.md

## news (2)

- **Google News API** — `GET /api/public/v1/google-news`. Give a query, get recent news items with source, date, and article URL. Required: `q`. Results key: `news_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-news.md
- **Bing News API** — `GET /api/public/v1/bing-news`. Give a query, get Bing news items with source and publish time. Required: `q`. Results key: `news_results`. Spec: https://marketplaceforaiagents.com/agent/listings/bing-news.md

## images (4)

- **Google Images API** — `GET /api/public/v1/google-images`. Give a query, get image URLs plus the page each image came from. Required: `q`. Results key: `images_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-images.md
- **Google Lens API** — `GET /api/public/v1/google-lens`. Give an image URL, get visual matches with titles, links, and prices where available. Required: `url`. Results key: `visual_matches`. Spec: https://marketplaceforaiagents.com/agent/listings/google-lens.md
- **Google Reverse Image API** — `GET /api/public/v1/google-reverse-image`. Give an image URL, get exact matches (pages hosting that image) and visual matches. Required: `image_url`. Results key: `exact_matches`. Spec: https://marketplaceforaiagents.com/agent/listings/google-reverse-image.md
- **Bing Images API** — `GET /api/public/v1/bing-images`. Give a query, get Bing image results with original URLs. Required: `q`. Results key: `images_results`. Spec: https://marketplaceforaiagents.com/agent/listings/bing-images.md

## commerce (6)

- **Google Shopping API** — `GET /api/public/v1/google-shopping`. Give a product query, get offers with price, merchant, rating, and product link. Required: `q`. Results key: `shopping_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-shopping.md
- **Amazon Search API** — `GET /api/public/v1/amazon-search`. Give a product query, get Amazon listings with ASIN, price, and rating. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/amazon-search.md
- **Amazon Product API** — `GET /api/public/v1/amazon-product`. Give an ASIN, get the full product record including price, features, and images. Required: `asin`. Results key: `product`. Spec: https://marketplaceforaiagents.com/agent/listings/amazon-product.md
- **Amazon Reviews API** — `GET /api/public/v1/amazon-reviews`. Give an ASIN, get review objects for sentiment and defect analysis. Required: `asin`. Results key: `reviews`. Spec: https://marketplaceforaiagents.com/agent/listings/amazon-reviews.md
- **Walmart Search API** — `GET /api/public/v1/walmart-search`. Give a query, get Walmart listings with price and product IDs. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/walmart-search.md
- **eBay Search API** — `GET /api/public/v1/ebay-search`. Give a query, get eBay listings including auction state and condition. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/ebay-search.md

## places (3)

- **Google Maps API** — `GET /api/public/v1/google-maps`. Give a place query (optionally with lat/lng), get businesses with address, rating, and place IDs. Required: `q`. Results key: `local_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-maps.md
- **Google Maps Reviews API** — `GET /api/public/v1/google-maps-reviews`. Give a place_id, get review objects with rating and text for sentiment analysis. Required: none. Results key: `reviews`. Spec: https://marketplaceforaiagents.com/agent/listings/google-maps-reviews.md
- **Google Events API** — `GET /api/public/v1/google-events`. Give an event query and a required location, get events with dates, venues, and ticket URLs. Required: `q`. Results key: `events`. Spec: https://marketplaceforaiagents.com/agent/listings/google-events.md

## trends (2)

- **Google Trends API** — `GET /api/public/v1/google-trends`. Give one or more keywords, get a time series of relative interest plus related rising queries. Required: `q`. Results key: `interest_over_time`. Spec: https://marketplaceforaiagents.com/agent/listings/google-trends.md
- **Google Autocomplete API** — `GET /api/public/v1/google-autocomplete`. Give a seed query, get the suggestion list Google would show. Required: `q`. Results key: `suggestions`. Spec: https://marketplaceforaiagents.com/agent/listings/google-autocomplete.md

## academic (3)

- **Google Scholar API** — `GET /api/public/v1/google-scholar`. Give a query, get scholarly results with citation counts and resource links. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-scholar.md
- **Google Scholar Author API** — `GET /api/public/v1/google-scholar-author`. Give an author_id, get their articles, h-index, and citation history. Required: `author_id`. Results key: `articles`. Spec: https://marketplaceforaiagents.com/agent/listings/google-scholar-author.md
- **Google Patents API** — `GET /api/public/v1/google-patents`. Give a query, get patents with assignee, dates, and abstract text. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-patents.md

## jobs (1)

- **Google Jobs API** — `GET /api/public/v1/google-jobs`. Give a role query and location, get job postings with apply URLs and job IDs. Required: `q`. Results key: `jobs`. Spec: https://marketplaceforaiagents.com/agent/listings/google-jobs.md

## finance (1)

- **Google Finance API** — `GET /api/public/v1/google-finance`. Give a ticker like NVDA:NASDAQ (SYMBOL:EXCHANGE; NASDAQ:NVDA and bare NVDA are normalized), get current price, movement, and key financial stats. Required: `q`. Results key: `summary`. Spec: https://marketplaceforaiagents.com/agent/listings/google-finance.md

## travel (2)

- **Google Flights API** — `GET /api/public/v1/google-flights`. Give origin, destination, and dates, get priced itineraries with legs and durations. Required: `departure_id`, `arrival_id`, `outbound_date`. Results key: `best_flights`. Spec: https://marketplaceforaiagents.com/agent/listings/google-flights.md
- **Google Hotels API** — `GET /api/public/v1/google-hotels`. Give a destination and date range, get properties with rates and ratings. Required: `q`, `check_in_date`, `check_out_date`. Results key: `properties`. Spec: https://marketplaceforaiagents.com/agent/listings/google-hotels.md

## app stores (2)

- **Google Play API** — `GET /api/public/v1/google-play`. Give a query, get Play Store apps with package IDs, ratings, and pricing. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/google-play.md
- **Apple App Store API** — `GET /api/public/v1/apple-app-store`. Give a query, get iOS apps with developer, rating, and app IDs. Required: `q`. Results key: `organic_results`. Spec: https://marketplaceforaiagents.com/agent/listings/apple-app-store.md

## intents (13)

- **SERP Stack Intent** — `GET /api/public/v1/serp-stack`. Give a query, get Google + Bing + DuckDuckGo organic results in one response. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/serp-stack.md
- **News Brief Intent** — `GET /api/public/v1/news-brief`. Give a topic, get Google News + Bing News articles in one response. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/news-brief.md
- **Brand Pulse Intent** — `GET /api/public/v1/brand-pulse`. Give a brand or ticker, get web results, news, and the finance quote together. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/brand-pulse.md
- **Deal Triage Intent** — `GET /api/public/v1/deal-triage`. Give a product query (or ASIN), get shopping offers, the Amazon listing, and reviews. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/deal-triage.md
- **Cross-Store Price Intent** — `GET /api/public/v1/cross-store-price`. Give a product query, get offers from Google Shopping, Amazon, eBay and Walmart. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/cross-store-price.md
- **Review Risk Intent** — `GET /api/public/v1/review-risk`. Give an ASIN, get the Amazon product record and its reviews together. Required: `asin`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/review-risk.md
- **Dual App Store Intent** — `GET /api/public/v1/aso-dual`. Give an app query, get Google Play and Apple App Store results together. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/aso-dual.md
- **Place Dossier Intent** — `GET /api/public/v1/place-dossier`. Give a place query, get the matching business record plus its reviews. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/place-dossier.md
- **Trip Skeleton Intent** — `GET /api/public/v1/trip-skeleton`. Give route and dates, get flights and hotels (and events when location is set). Required: `departure_id`, `arrival_id`, `outbound_date`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/trip-skeleton.md
- **Video Digest Intent** — `GET /api/public/v1/video-digest`. Give a topic (or video_id), get the top video's metadata and full transcript. Required: none. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/video-digest.md
- **Trend Then SERP Intent** — `GET /api/public/v1/trend-then-serp`. Give a keyword, get its trend series and the current Google results. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/trend-then-serp.md
- **Image Provenance Intent** — `GET /api/public/v1/image-provenance`. Give an image URL, get visual matches and pages hosting the exact image. Required: `image_url`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/image-provenance.md
- **Scholar Pack Intent** — `GET /api/public/v1/scholar-pack`. Give a research query (and optionally an author_id), get papers and that author's record. Required: `q`. Results key: `results`. Spec: https://marketplaceforaiagents.com/agent/listings/scholar-pack.md