# Marketplace for AI Agents

51 HTTP APIs an autonomous agent can call and pay for in one round-trip. No account, no API key, no plan. Price is $0.005 USDC per call on Base mainnet; the first 3 calls per agent identity are free in total across all endpoints.

## Contract

- request: `GET https://marketplaceforaiagents.com/api/public/v1/{slug}?{params}`
- unpaid response after free tier: `402` with x402 `accepts[]`
- paid request: same URL with `X-PAYMENT: <base64 x402 payload>`
- paid response: `200` JSON + `X-PAYMENT-RESPONSE` settlement receipt
- sandbox: add `network=base-sepolia` for testnet USDC and mock data

## When an agent needs…

Built for high-autonomy agents (Grok Bot, Claude Cowork, Cursor agents) that call HTTP and MCP with little human oversight. Match the assigned task to an endpoint:

- **Get the transcript / captions of a YouTube video** → `GET https://marketplaceforaiagents.com/api/public/v1/youtube-transcripts?video_id=0e3GPea1Tyg`
- **Search the web / Google for a topic** → `GET https://marketplaceforaiagents.com/api/public/v1/google-search?q=x402+protocol`
- **Find recent news articles on a topic** → `GET https://marketplaceforaiagents.com/api/public/v1/google-news?q=stablecoin+payments`
- **Search Amazon for products** → `GET https://marketplaceforaiagents.com/api/public/v1/amazon-search?q=usb+c+hub`
- **Get an Amazon product's details, price, and specs** → `GET https://marketplaceforaiagents.com/api/public/v1/amazon-product?asin=B08N5WRWNW`
- **Compare prices across shopping results** → `GET https://marketplaceforaiagents.com/api/public/v1/google-shopping?q=noise+cancelling+headphones`
- **Find flights between two airports** → `GET https://marketplaceforaiagents.com/api/public/v1/google-flights?departure_id=ORD&arrival_id=LAX&outbound_date=2026-10-15`
- **Look up local businesses / places on a map** → `GET https://marketplaceforaiagents.com/api/public/v1/google-maps?q=coffee+in+Austin`
- **Find academic papers and citations** → `GET https://marketplaceforaiagents.com/api/public/v1/google-scholar?q=large+language+model+agents`
- **Look up iOS apps on the Apple App Store** → `GET https://marketplaceforaiagents.com/api/public/v1/apple-app-store?q=Case+Law+Search`
- **Look up Android apps on Google Play** → `GET https://marketplaceforaiagents.com/api/public/v1/google-play?q=budget+tracker`
- **Find job postings** → `GET https://marketplaceforaiagents.com/api/public/v1/google-jobs?q=react+engineer+remote`
- **Search hotels for a stay** → `GET https://marketplaceforaiagents.com/api/public/v1/google-hotels?q=hotels+in+Lisbon`
- **Get stock or ticker data** → `GET https://marketplaceforaiagents.com/api/public/v1/google-finance?q=NVDA`
- **Search images** → `GET https://marketplaceforaiagents.com/api/public/v1/google-images?q=solar+panel+diagram`

## Machine entrypoints

- `https://marketplaceforaiagents.com/.well-known/x402` — discovery manifest
- `https://marketplaceforaiagents.com/.well-known/ai-plugin.json` — agent plugin manifest
- `https://marketplaceforaiagents.com/api/public/v1/openapi.json` — OpenAPI 3.1
- `https://marketplaceforaiagents.com/api/public/v1/catalog.json` — full catalog as JSON
- `https://marketplaceforaiagents.com/mcp` — MCP server (no auth)
- `https://marketplaceforaiagents.com/llms.txt` and `https://marketplaceforaiagents.com/llms-full.txt`
- `https://marketplaceforaiagents.com/agent/` — Markdown twin of every page

## Catalog

### video

- `youtube-transcripts` — Give a YouTube video ID or URL, get an array of {text, start, duration} caption segments. (https://marketplaceforaiagents.com/agent/listings/youtube-transcripts.md)
- `youtube-video` — Give a video ID, get title, channel, view/like counts, publish date, and description text. (https://marketplaceforaiagents.com/agent/listings/youtube-video.md)
- `youtube-search` — Give a query, get ranked YouTube videos with IDs you can feed into the transcripts endpoint. (https://marketplaceforaiagents.com/agent/listings/youtube-search.md)
- `google-videos` — Give a query, get cross-platform video results with source URLs. (https://marketplaceforaiagents.com/agent/listings/google-videos.md)
- `bing-videos` — Give a query, get video results across publishers with durations. (https://marketplaceforaiagents.com/agent/listings/bing-videos.md)

### web search

- `google-search` — Give a query, get ranked organic results with title, link, snippet, plus knowledge graph and related searches. (https://marketplaceforaiagents.com/agent/listings/google-search.md)
- `bing-search` — Give a query, get Bing organic results — a second opinion against Google rankings. (https://marketplaceforaiagents.com/agent/listings/bing-search.md)
- `duckduckgo-search` — Give a query, get DuckDuckGo organic results with title, link, and snippet. (https://marketplaceforaiagents.com/agent/listings/duckduckgo-search.md)
- `yandex-search` — Give a query, get Yandex organic results for regional coverage. (https://marketplaceforaiagents.com/agent/listings/yandex-search.md)
- `baidu-search` — Give a query, get Baidu organic results for China-market coverage. (https://marketplaceforaiagents.com/agent/listings/baidu-search.md)
- `naver-search` — Give a query, get Naver results across web, blog, and news verticals. (https://marketplaceforaiagents.com/agent/listings/naver-search.md)
- `yahoo-search` — Give a query, get Yahoo organic results. (https://marketplaceforaiagents.com/agent/listings/yahoo-search.md)

### news

- `google-news` — Give a query, get recent news items with source, date, and article URL. (https://marketplaceforaiagents.com/agent/listings/google-news.md)
- `bing-news` — Give a query, get Bing news items with source and publish time. (https://marketplaceforaiagents.com/agent/listings/bing-news.md)

### images

- `google-images` — Give a query, get image URLs plus the page each image came from. (https://marketplaceforaiagents.com/agent/listings/google-images.md)
- `google-lens` — Give an image URL, get visual matches with titles, links, and prices where available. (https://marketplaceforaiagents.com/agent/listings/google-lens.md)
- `google-reverse-image` — Give an image URL, get exact matches (pages hosting that image) and visual matches. (https://marketplaceforaiagents.com/agent/listings/google-reverse-image.md)
- `bing-images` — Give a query, get Bing image results with original URLs. (https://marketplaceforaiagents.com/agent/listings/bing-images.md)

### commerce

- `google-shopping` — Give a product query, get offers with price, merchant, rating, and product link. (https://marketplaceforaiagents.com/agent/listings/google-shopping.md)
- `amazon-search` — Give a product query, get Amazon listings with ASIN, price, and rating. (https://marketplaceforaiagents.com/agent/listings/amazon-search.md)
- `amazon-product` — Give an ASIN, get the full product record including price, features, and images. (https://marketplaceforaiagents.com/agent/listings/amazon-product.md)
- `amazon-reviews` — Give an ASIN, get review objects for sentiment and defect analysis. (https://marketplaceforaiagents.com/agent/listings/amazon-reviews.md)
- `walmart-search` — Give a query, get Walmart listings with price and product IDs. (https://marketplaceforaiagents.com/agent/listings/walmart-search.md)
- `ebay-search` — Give a query, get eBay listings including auction state and condition. (https://marketplaceforaiagents.com/agent/listings/ebay-search.md)

### places

- `google-maps` — Give a place query (optionally with lat/lng), get businesses with address, rating, and place IDs. (https://marketplaceforaiagents.com/agent/listings/google-maps.md)
- `google-maps-reviews` — Give a place_id, get review objects with rating and text for sentiment analysis. (https://marketplaceforaiagents.com/agent/listings/google-maps-reviews.md)
- `google-events` — Give an event query and a required location, get events with dates, venues, and ticket URLs. (https://marketplaceforaiagents.com/agent/listings/google-events.md)

### trends

- `google-trends` — Give one or more keywords, get a time series of relative interest plus related rising queries. (https://marketplaceforaiagents.com/agent/listings/google-trends.md)
- `google-autocomplete` — Give a seed query, get the suggestion list Google would show. (https://marketplaceforaiagents.com/agent/listings/google-autocomplete.md)

### academic

- `google-scholar` — Give a query, get scholarly results with citation counts and resource links. (https://marketplaceforaiagents.com/agent/listings/google-scholar.md)
- `google-scholar-author` — Give an author_id, get their articles, h-index, and citation history. (https://marketplaceforaiagents.com/agent/listings/google-scholar-author.md)
- `google-patents` — Give a query, get patents with assignee, dates, and abstract text. (https://marketplaceforaiagents.com/agent/listings/google-patents.md)

### jobs

- `google-jobs` — Give a role query and location, get job postings with apply URLs and job IDs. (https://marketplaceforaiagents.com/agent/listings/google-jobs.md)

### finance

- `google-finance` — Give a ticker like NASDAQ:AAPL, get current price, movement, and key financial stats. (https://marketplaceforaiagents.com/agent/listings/google-finance.md)

### travel

- `google-flights` — Give origin, destination, and dates, get priced itineraries with legs and durations. (https://marketplaceforaiagents.com/agent/listings/google-flights.md)
- `google-hotels` — Give a destination and date range, get properties with rates and ratings. (https://marketplaceforaiagents.com/agent/listings/google-hotels.md)

### app stores

- `google-play` — Give a query, get Play Store apps with package IDs, ratings, and pricing. (https://marketplaceforaiagents.com/agent/listings/google-play.md)
- `apple-app-store` — Give a query, get iOS apps with developer, rating, and app IDs. (https://marketplaceforaiagents.com/agent/listings/apple-app-store.md)

### intents

- `serp-stack` — Give a query, get Google + Bing + DuckDuckGo organic results in one response. (https://marketplaceforaiagents.com/agent/listings/serp-stack.md)
- `news-brief` — Give a topic, get Google News + Bing News articles in one response. (https://marketplaceforaiagents.com/agent/listings/news-brief.md)
- `brand-pulse` — Give a brand or ticker, get web results, news, and the finance quote together. (https://marketplaceforaiagents.com/agent/listings/brand-pulse.md)
- `deal-triage` — Give a product query (or ASIN), get shopping offers, the Amazon listing, and reviews. (https://marketplaceforaiagents.com/agent/listings/deal-triage.md)
- `cross-store-price` — Give a product query, get offers from Google Shopping, Amazon, eBay and Walmart. (https://marketplaceforaiagents.com/agent/listings/cross-store-price.md)
- `review-risk` — Give an ASIN, get the Amazon product record and its reviews together. (https://marketplaceforaiagents.com/agent/listings/review-risk.md)
- `aso-dual` — Give an app query, get Google Play and Apple App Store results together. (https://marketplaceforaiagents.com/agent/listings/aso-dual.md)
- `place-dossier` — Give a place query, get the matching business record plus its reviews. (https://marketplaceforaiagents.com/agent/listings/place-dossier.md)
- `trip-skeleton` — Give route and dates, get flights and hotels (and events when location is set). (https://marketplaceforaiagents.com/agent/listings/trip-skeleton.md)
- `video-digest` — Give a topic (or video_id), get the top video's metadata and full transcript. (https://marketplaceforaiagents.com/agent/listings/video-digest.md)
- `trend-then-serp` — Give a keyword, get its trend series and the current Google results. (https://marketplaceforaiagents.com/agent/listings/trend-then-serp.md)
- `image-provenance` — Give an image URL, get visual matches and pages hosting the exact image. (https://marketplaceforaiagents.com/agent/listings/image-provenance.md)
- `scholar-pack` — Give a research query (and optionally an author_id), get papers and that author's record. (https://marketplaceforaiagents.com/agent/listings/scholar-pack.md)