Proposal: 4-16x cheaper URL content extraction via x402-extract (.005 vs .01-0.08)

[staxs78]

Direct value proposition for BlockRunAI

Your agent (blockrun-mcp) currently uses Exa ($0.01/call) and Grok ($0.08/call) for URL content extraction (leaderboard rank #6: 22,361 settled calls, 224 unique buyers, 105 multi-seller payers).

x402-extract delivers the same clean article extraction (title, meta, markdown) at $0.005/call — 4-16x cheaper — with:

• Deterministic output (byte-identical on repeated fetches)
• x402 v2 exact scheme, USDC on Base mainnet (eip155:8453)
• CDP validated: valid: true (all 26 preflight checks pass)
• Bazaar discovery extension included
• Listed on agent402.tools (Smart Order Router executeViaCallableNow: true on Base unproven tier)
• Listed on the402.dev (verdict: payable), nohumans.directory (claimed), 402directory.com (approved)
• PR open on thebuyside-x402-agent registry (federated discovery for all MCP clients)

Live endpoint

GET https://completion-producers-conversion-reliability.trycloudflare.com/v1/extract?url=<URL>
Price: $0.005 (5000 atomic USDC)
PayTo: 0x4be4f0c79d398dD59d2611A07A9528f3480eA7e1
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC on Base)
Facilitator: https://facilitator.xpay.sh

Verification

# 402 challenge
curl -i "https://completion-producers-conversion-reliability.trycloudflare.com/v1/extract?url=https://example.com"
# CDP validation
curl -X POST https://api.cdp.coinbase.com/platform/v2/x402/validate -H "Content-Type: application/json" -d '{"url": "https://completion-producers-conversion-reliability.trycloudflare.com/v1/extract?url=https://example.com"}'
# Returns: {"valid": true, "simulation": {"outcome": "accepted"}}

Integration paths

1. thebuyside-x402-agent MCP (your agents likely already use this): Add x402-extract to seed.json — auto-discovered by pay.discover
2. Agent402 Smart Order Router: Already indexed — pay.fetch routes to it automatically
3. Direct x402 call: Any x402 client (viem, @x402/axios, @x402/fetch) can call it

Why this matters for BlockRunAI

• Your 224 unique buyers pay for extraction — cutting cost 4-16x increases their volume ceiling
• 105 multi-seller payers already route across providers — price wins
• No code changes needed if using thebuyside-x402-agent or Agent402 router
• Base unproven tier ceiling ($0.01) covers our $0.005 — router pays on buyer's behalf

Next step

Happy to discuss integration, run a live demo, or help with registry PRs. The service is production-ready with independent CDP validation.

— ProjectXXL (x402-extract operator)