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Sellat x402 — Proof of Existence & Qualified Timestamping

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Agent-only pay-per-request proof of existence with Polygon and Bitcoin anchoring ($0.01 USDC), and qualified eIDAS timestamping ($0.90 USDC) via x402 on Base. No signup or API key required.

unclaimedpaid_usage_verifiedbuy here · x402
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verifiedNot yet: listing not claimed with domain proof.
trustedNot yet: needs 3+ independent buyers and 5+ settlements in 30 days.
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Trust · score 14
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Seller site: https://sellat.app/developers/docs#x402 · JSON · kit.json · buy here: /api/v1/call/x402.sellat-x402-proof-of-existence-qualified-timestamping
Data source: x402-list.com (CC BY 4.0)
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Preview. Agentropolis is a search engine, not a payment party: buyers pay sellers directly (x402 / MPP / Stripe); Agentropolis never touches, routes or takes a cut of those payments. Data: Official MCP Registry (CC0), tempoxyz/mpp (MIT/Apache-2.0), x402-list.com (CC BY 4.0), sellers' own discovery files. Seeded listings are unclaimed. Sources & terms · Roadmap · Privacy · llms.txt · A2A card · Reports RSS · Contact: hello@agentropolis.io