An Exa alternative you can pay per call, with no account

Why use x402serps

Agents with a wallet can pay per request without anyone creating an account or managing an API key. Teams that prefer cards can buy credits once and use a Bearer key.

When Exa may suit you better

Exa's neural index and semantic search are strong for finding similar pages and research-style queries. If you need that, use Exa; if you need classic search results pages (SERPs), local places or shopping results, x402serps fits.

Migrating

POST https://x402serps.com/api/v1/search {"q": ...}; extract page text with /api/v1/extract ($0.003 per URL).

How it works

Exa offers neural search over its own index. x402serps returns keyword search results from a third-party search provider, which suits queries about current events, products, docs and anything where you want the normal ranking of the open web.

Both cost $0.004 per basic search. The differences are payment and scope: x402serps can be paid per call with x402 USDC on Base or Solana with no account, and adds news, images, places, shopping, scholar and video endpoints with the same request style.

Request and response: /api/v1/search

POST /api/v1/search costs $0.004 per call. Send the parameters as a JSON body.

curl -X POST https://x402serps.com/api/v1/search \
  -H "content-type: application/json" \
  -H "X-Trial: 1" \
  -d '{"q":"x402 protocol","num":10,"gl":"us"}'

Example response (values shortened; field names are exactly what the API returns):

{
  "query": "x402 protocol",
  "provider": "primary",
  "results": [
    {
      "position": 1,
      "title": "x402",
      "url": "https://x402.org/",
      "snippet": "x402 is an open payment standard that lets clients pay for APIs and content over HTTP..."
    },
    {
      "position": 2,
      "title": "coinbase/x402: A payments protocol for the internet",
      "url": "https://github.com/coinbase/x402",
      "snippet": "x402 is a chain-agnostic protocol built around the HTTP 402 Payment Required status code..."
    }
  ]
}

Request and response: /api/v1/news

POST /api/v1/news costs $0.004 per call. Send the parameters as a JSON body.

curl -X POST https://x402serps.com/api/v1/news \
  -H "content-type: application/json" \
  -H "X-Trial: 1" \
  -d '{"q":"stablecoin regulation","freshness":"week","num":10}'

Example response (values shortened; field names are exactly what the API returns):

{
  "query": "stablecoin regulation",
  "provider": "primary",
  "results": [
    {
      "position": 1,
      "title": "Regulators publish new stablecoin guidance",
      "url": "https://example-news.com/stablecoins",
      "snippet": "Officials set out reserve and disclosure rules for dollar-backed tokens...",
      "source": "Example News",
      "date": "2 days ago"
    }
  ]
}

Use cases

• Fresh, keyword-driven queries. Error messages, product names and recent news.
• Agent self-payment. Let an agent buy its own searches with x402.
• One API for verticals. Places, shopping, scholar and videos from the same base URL.
• Page reading. Follow up with /api/v1/extract for markdown text.

Paying for calls

Every call is priced on its own. With x402, an unpaid request returns HTTP 402 with the exact amount, asset and recipient for USDC on Base or Solana; your client signs a payment and repeats the same request, and results come back once the payment settles. No account or API key is involved. If you would rather pay by card, buy a credit pack on the pricing page and send Authorization: Bearer xs_.... Cached repeat queries cost half for credit keys, and failed calls are not charged. Paid calls have no per-minute rate limit.

FAQ