38 production APIs in one format: search results, scraping with anti-bot bypass, 17 captcha types, OCR in 100+ languages, consistent browser fingerprints. Pay per request with USDC — no subscription, no registration, no minimum.
curl -X POST https://api.serp-base.com/v1/query \
-H "Content-Type: application/json" \
-d '{"tool":"google_web","query":"best crm"}'
# HTTP 402 → pay $0.001 in USDC on Base
# Repeat with X-PAYMENT header → 200 OKAll services take JSON in, JSON out. Prices are per 1,000 requests. Pay per call with USDC via x402, or top up a balance and use an API key.
Google and Yandex web, images, maps, news, shopping, positions and Wordstat — one normalized JSON.
Fetch and parse any page. Heavy JS sites handled by a real stealth browser.
Read a form before you touch it, then send an application — no logins, no payments.
Read text from images and PDFs. Multilingual — no language setting needed.
Give a URL and the fields you want — get validated JSON, not raw HTML.
Consistent fingerprints from real browsers — not synthetic templates.
Full-page or viewport screenshots of any URL, including protected ones.
Dedicated IPv4, IPv6 or MTproto by country and period — for our API or any tool of yours.
17 captcha types with a 100% accuracy mode — from simple images to Cloudflare Turnstile and Yandex SmartCaptcha.
Plug the whole catalog into your AI agent over MCP — tools discovered automatically.
Most providers hand you a browser and leave the hard part to you. We solve the hard part: 17 captcha types, stealth browser rendering, and profiles that already passed Cloudflare, DataDome and Yandex.
Browserbase charges $20–99/month plus $0.10–0.12 per browser hour. SerpApi and similar charge $7–15 per 1,000 searches. We charge $1 for the same search, $2 for a scrape.
Agents pay per request with USDC on Base via the x402 protocol. Nothing to register, no card, no monthly fee. Prefer a dashboard with a balance? Create an account and use an API key.
Search, scrape, captcha, OCR, extraction and fingerprints all speak the same simple JSON contract. Learn it once, use it across the whole catalog.
An agent or a script sends the request, gets HTTP 402 with the price,
signs a USDC payment on Base, and repeats the call. Money moves, data comes back.
No registration anywhere in the flow.
POST /v1/query {"tool":"google_web","query":"..."}
← 402 Payment Required (price, network, address)
POST /v1/query + X-PAYMENT: <signed>
← 200 {"ok":true,"data":...}Create an account with your email, confirm it, top up with USDC and get an API key. One key for all services, or separate keys per service with their own limits — your choice. Usage, spend and history live in the dashboard.
No monthly fee. You only pay for what you call. Volume pricing available on request.
| Service | Endpoint | Price / 1,000 |
|---|---|---|
| Search results | google_web, yandex_web, … | $1.00 |
| Page fetch & parse (plain HTTP) | parse_page | $2.00 |
| Forms: read, submit, submit with captcha | form_action — inspect / submit | $1.00 / $2.00 |
| OCR — images | ocr_document | $3.00 |
| Data by schema (validated JSON) | extract_schema | $6.00 |
| Browser fingerprints (24 fields) | fingerprint | $6.00 |
| Screenshots (full page) | screenshot_page | $10.00 |
| Browser rendering + anti-bot | parse_page_pro | $7.00 |
| Captcha solving — any type | captcha_* | $7.00 |
| Proxy — dedicated IPv4 (per 30 days) | proxy_buy | $1.77 |
| OCR — PDF documents (up to 10 pages) | ocr_pdf | $20.00 |
Payment: USDC on Base (mainnet) via x402. Test the whole flow free on Base Sepolia.
| serp-base | Browserbase | SerpApi / Exa | |
|---|---|---|---|
| Search per 1,000 | $1.00 | — | $7–15 |
| Monthly subscription | $0 | $20–99 | $50–500 |
| Signup required | No | Yes + card | Yes + card |
| Captcha solving | 17 types | ✗ | ✗ |
| Anti-bot / stealth browser | Yes | Basic | ✗ |
| Pay per request in crypto | USDC / x402 | ✗ | ✗ |
No. Every service can be called with pay-per-request via x402 — you pay in USDC on Base and get your data. An account is only needed if you want a prepaid balance, API keys and a usage dashboard.
You (or your agent) receive HTTP 402 with the price, the network and our address, sign a USDC payment on Base, and repeat the request with the X-PAYMENT header. Gas is paid by the facilitator, so you only need USDC.
17 types: reCAPTCHA v2 and v3, hCaptcha, Cloudflare Turnstile, Geetest (v3 and v4), DataDome, Amazon WAF, Yandex SmartCaptcha, VK, Prosopo, Lemin, Capy and classic image captchas.
Yes — that is the primary use case. Agents can call the API with x402 directly, or connect over MCP to discover all services automatically. Works with Claude Code, Cursor, CrewAI and any MCP-capable client.
We execute the work first and charge only if data is returned. If a service fails to produce a result, no payment is taken — nothing is settled on-chain.
Yes, on testnet. The full payment flow including all six service families can be exercised on Base Sepolia with free test USDC from the Circle faucet.
No signup for pay-per-request. Create an account only if you want a balance dashboard.