marketplaceforaiagents.com
live on base mainnet · usdc settlement

APIs priced per call.
Paid by agents, not humans.

YouTube transcripts, Google web search and news, Amazon and shopping data, flights, maps, Scholar papers, jobs, and app stores — 51 endpoints an autonomous agent can call the moment it is handed a task.

Built for high-autonomy agents. Every endpoint speaks x402 — agents discover, price-check, and pay in USDC over a single HTTP round-trip. No accounts. No keys. No invoicing.

browse marketplace →integration docs
free tier
3 calls / agent
per call
$0.005
endpoints
51 live
live request → response
GET /api/public/v1/youtube-transcripts?video_id=0e3GPea1Tyg

→ 200 OK
  X-PAYMENT-RESPONSE: eyJzdWNjZXNzIjp0cnVl...

  {
    "video_id": "0e3GPea1Tyg",
    "lang": "en",
    "transcripts": [
      { "text": "Welcome back to the channel...",
        "start": 0.0, "duration": 4.2 },
      ...
    ],
    "available_languages": [
      { "name": "English", "lang": "en" }
    ]
  }

No payment header on the first 3 calls. After that, send X-PAYMENT with a signed USDC authorization and the same request returns the transcript.

trust / verifiedpayment_verified: true
  • settlement-verified

    PayAPI Market: payment_verified true, status live — a third party paid USDC on Base and got a real response. payapi.market/api/marketplace-for-ai-agents

  • listed / routable

    agent402.tools: listed and routable (health 1) with 51 tools from this origin. agent402.tools

  • settle on 2xx only

    Payment settles only after the upstream returns 2xx. Failed calls (502 upstream_error) are not charged.

  • 51 endpoints

    38 single engines + 13 named intent chains. Intent price is $0.005 x steps, with the chain in the 402.

  • public MCP

    https://marketplaceforaiagents.com/mcp — payment is the auth, no OAuth, no signup. marketplaceforaiagents.com/mcp

  • payee / asset

    payTo 0x05e82e03753c7bc99fb24d10a876cce53f24b7b7, USDC on Base 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Allowlist both before signing.

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

protocol

One request. One payment.
Zero accounts.

x402 is HTTP 402, finished. The agent calls the endpoint, gets a payment requirement, signs a USDC authorization, retries. Settlement happens on Base in the same round-trip.

  1. 01Agent sends initial requestGET /api/public/v1/...
  2. 02Server replies with payment requirements402 Payment Required
  3. 03Agent signs USDC EIP-3009 authorizationno gas, no tx wait
  4. 04Server verifies, settles, returns data200 OK + receipt
featured

51 endpoints, one payment contract

Web search, news, images, commerce, maps, travel, jobs, academic research, app stores, and video transcripts — every one metered at the same flat per-call price.

all listings →
video

YouTube Transcripts API

Give a YouTube video ID or URL, get an array of {text, start, duration} caption segments.

$0.005GET/api/public/v1/youtube-transcripts
video

YouTube Video API

Give a video ID, get title, channel, view/like counts, publish date, and description text.

$0.005GET/api/public/v1/youtube-video
video

YouTube Search API

Give a query, get ranked YouTube videos with IDs you can feed into the transcripts endpoint.

$0.005GET/api/public/v1/youtube-search
video

Google Videos API

Give a query, get cross-platform video results with source URLs.

$0.005GET/api/public/v1/google-videos
web search

Google Search API

Give a query, get ranked organic results with title, link, snippet, plus knowledge graph and related searches.

$0.005GET/api/public/v1/google-search
news

Google News API

Give a query, get recent news items with source, date, and article URL.

$0.005GET/api/public/v1/google-news
machine entrypoints

Nothing here needs
an HTML parser.

Every page has a Markdown twin under /agent/, and the whole catalog is one JSON fetch. Read the manifest, pick a slug, sign the 402.

for agents

Built for autonomous consumption

  • ·No signup, no API key provisioning, no rate-limit dashboards
  • ·Standard x402-fetch client works out of the box
  • ·Deterministic pricing returned in the 402 response — agents budget before they spend
  • ·Free tier per identity so agents can probe endpoints before paying
for sellers

Resell APIs as machine-payable endpoints

  • ·Wrap any upstream HTTP API with a per-call price
  • ·Settlement to your wallet on Base — no payout flows
  • ·Listed in a directory agents already crawl
  • ·Seller onboarding opens after the first listings prove demand