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Duo Data Utilities

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33 small deterministic data utilities for agents and developers, each a plain GET at $0.05 paid over x402 (USDC on Base). Identifier check digits (national IDs, IBAN, GS1, ISIN/CUSIP/SEDOL/FIGI), dates, calendars and time zones, text and Unicode, URL/IDN/semver/hash/JWT parsing, geohash and plus codes, geodesic distance, blockchain address and selector primitives, reference tables (NUTS, airports, currencies, countr…

unclaimedpaid_usage_verifiedbuy here · x402
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Seller site: https://duoleads.com · JSON · kit.json · buy here: /api/v1/call/x402.duo-data-utilities
Data source: x402-list.com (CC BY 4.0)
GET https://api.duoleads.com/v1/id/iban-build
GET https://api.duoleads.com/v1/id/iban
GET https://api.duoleads.com/v1/num/allocate
GET https://api.duoleads.com/v1/num/stats
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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