The content you requested is behind a paywall

What happened?

Your request reached the publisher's CDN edge node. The edge checked the resource's access rules and determined that this URL requires a valid AISA crawler token and sufficient balance. Since no token was provided (or the token was invalid), the edge returned a 402 status instead of the content.

How the payment model works

AISA uses a pay-per-crawl model. Publishers set prices for their content, and your crawler pays per request from a prepaid balance. There are no subscriptions, no monthly fees, and no per-site contracts. You control your spending with built-in budget modes.

• Pay-per-Crawl Pay only for pages you actually access. No wasted spend.
• One Token A single token works across all publishers on the AISA network.
• Price Discovery Every paid resource returns its price before you commit.
• Budget Control Set a maximum price per request. If the cost exceeds your cap, the request is declined — no charge.
• Edge Delivery Content is served from Alibaba Cloud ESA's global network. Verification happens at the edge with minimal latency.

Getting started

1. Create an account — register on the AISA platform to get your crawler_token.
2. Fund your wallet — add balance via crypto (Solana, Base, Polygon, Lightning, BNB) or card (Stripe).
3. Include your token — add X-AISA-Crawler-Token: <token> to your crawl requests.
4. Access content — the CDN verifies your token, deducts the price, and returns the content.

# Request with token — the CDN handles verification and payment
curl -H "X-AISA-Crawler-Token: YOUR_CRAWLER_TOKEN" \
     https://example.com/premium/article-123

# If your balance is sufficient, you get the content directly.
# If not, you get a 402 with the price so your agent can decide.

Note: the legacy Authorization: Bearer <token> header is no longer accepted (deprecated 2026-04 per Aliyun security review — generic auth headers leak through middleware). Use the custom X-AISA-Crawler-Token header instead.

Pricing modes

Your agent can choose how to handle payments on each request:

• Auto Pay Automatically pay the publisher's price if your balance covers it.
• Budget Cap Set a maximum. Pay only if the resource price is within your limit.
• Exact Match Pay only if the price matches a specific amount you expect.

For AI agents — the complete flow, copy-pasteable

Everything below uses this host's JSON APIs directly. Machine-readable companions: /llms.txt (site index) · /agent/llms.txt (this flow as plain text) · /agent/skill.md (drop-in agent skill) · /agent/docs.html (full API reference).

# 1. Register once — save crawler.crawlerToken from the response
curl -s -X POST "$BASE/api/agent/auth/register" -H "Content-Type: application/json" \
  -d '{"email":"mybot@example.com","password":"AtLeast8Chars","name":"My Crawler","crawlerType":"custom"}'
# → { "crawler": { "crawlerToken": "aisa_crawler_...", "balance": 0.10 }, "signupBonus": {...}? }
# New accounts may start with a small trial credit (see signupBonus) — if so, skip straight to step 4.

# 2. Already registered? Recover token and check balance
curl -s -X POST "$BASE/api/agent/auth/login" -H "Content-Type: application/json" \
  -d '{"email":"mybot@example.com","password":"AtLeast8Chars"}'
# → { "token": "<session token>", "crawler": { "crawlerToken": "...", "balance": 4.98 } }

# 3. Top up when the balance is low (Stripe checkout URL — open it to pay)
curl -s -X POST "$BASE/api/agent/topup/create-session" \
  -H "Content-Type: application/json" -H "Authorization: Bearer <session token from login>" \
  -d '{"amount": 5.00}'

# 4. Retry the ORIGINAL resource URL with your crawler token — the edge verifies and charges
curl -H "X-AISA-Crawler-Token: aisa_crawler_..." https://publisher-site.example/premium/data.json

$BASE is this host (the same origin that served you this page). The session token (login) is only for account APIs like top-up; the crawlerToken is what you send when crawling.

Reading the 402/403 JSON

When access is denied, the response body tells you exactly why and what to do next. Check error first:

Every denial also carries these companion fields: