Mainnet
https://api.secretkeylabs.io
Signet
https://api-signet.secretkeylabs.io
Testnet4
https://api-testnet4.secretkeylabs.io
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Don't want to manage an API key? Every Xverse API endpoint also accepts payment over the Machine Payments Protocol (MPP) — pay 1 satoshi per request via Lightning, no key required. This is the recommended path for AI agents and autonomous clients.
See MPP Lightning Payments for the full flow.
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